Upload LingBot fast chunk-size ablation

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/logs/example05_chunk01_seed6200.log

@@ -0,0 +1,23 @@
+Command: torchrun --nproc_per_node 4 --master_port 54584 generate_fast.py --task i2v-A14B --size '480*832' --ckpt_dir models/lingbot-world-base-cam --image examples/05/image.jpg --action_path examples/05 --dit_fsdp --t5_fsdp --ulysses_size 4 --frame_num 141 --base_seed 6200 --save_file experiments/fast_chunk_ablation_20260528/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4 --prompt 'A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.' --chunk_size 1
+W0528 22:14:50.260000 927363 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] 
+W0528 22:14:50.260000 927363 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+W0528 22:14:50.260000 927363 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed. 
+W0528 22:14:50.260000 927363 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+[2026-05-28 22:15:15,623] INFO: offload_model is not specified, set to False.
+[2026-05-28 22:15:15,671] INFO: Generation job args: Namespace(task='i2v-A14B', size='480*832', frame_num=141, ckpt_dir='models/lingbot-world-base-cam', offload_model=False, ulysses_size=4, t5_fsdp=True, t5_cpu=False, dit_fsdp=True, save_file='experiments/fast_chunk_ablation_20260528/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4', prompt='A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.', prompt_b=None, switch_frame=None, prompt_switch_case=None, use_prompt_extend=False, base_seed=6200, image='examples/05/image.jpg', action_path='examples/05', sample_shift=10.0, convert_model_dtype=False, local_attn_size=-1, sink_size=0, max_attention_size=None, chunk_size=1, save_dir='output')
+[2026-05-28 22:15:15,671] INFO: Generation model config: {'__name__': 'Config: Wan I2V A14B', 't5_model': 'umt5_xxl', 't5_dtype': torch.bfloat16, 'text_len': 512, 'param_dtype': torch.bfloat16, 'num_train_timesteps': 1000, 'sample_fps': 16, 'sample_neg_prompt': '画面突变，色调艳丽，过曝，静态，细节模糊不清，字幕，风格，作品，画作，画面，静止，整体发灰，最差质量，低质量，JPEG压缩残留，丑陋的，残缺的，多余的手指，画得不好的手部，画得不好的脸部，畸形的，毁容的，形态畸形的肢体，手指融合，静止不动的画面，杂乱的背景，三条腿，背景人很多，倒着走，镜头晃动，画面闪烁，模糊，噪点，水印，签名，文字，变形，扭曲，液化，不合逻辑的结构，卡顿，PPT幻灯片感，过暗，欠曝，低对比度，霓虹灯光感，过度锐化，3D渲染感，人物，行人，游客，身体，皮肤，肢体，面部特征，汽车，电线', 'frame_num': 81, 't5_checkpoint': 'models_t5_umt5-xxl-enc-bf16.pth', 't5_tokenizer': 'google/umt5-xxl', 'vae_checkpoint': 'Wan2.1_VAE.pth', 'vae_stride': (4, 8, 8), 'patch_size': (1, 2, 2), 'dim': 5120, 'ffn_dim': 13824, 'freq_dim': 256, 'num_heads': 40, 'num_layers': 40, 'window_size': (-1, -1), 'qk_norm': True, 'cross_attn_norm': True, 'eps': 1e-06, 'low_noise_checkpoint': 'low_noise_model', 'high_noise_checkpoint': 'high_noise_model', 'fast_noise_checkpoint': 'lingbot_world_fast', 'sample_shift': 10.0, 'sample_steps': 70, 'boundary': 0.947, 'sample_guide_scale': (5.0, 5.0)}
+NCCL version 2.21.5+cuda12.4
+[2026-05-28 22:15:18,285] INFO: Input prompt: A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.
+[2026-05-28 22:15:18,341] INFO: Input image: examples/05/image.jpg
+[2026-05-28 22:15:18,341] INFO: Creating WanI2VFast pipeline.
+[2026-05-28 22:16:07,788] INFO: loading models/lingbot-world-base-cam/models_t5_umt5-xxl-enc-bf16.pth
+[2026-05-28 22:16:24,615] INFO: loading models/lingbot-world-base-cam/Wan2.1_VAE.pth
+[2026-05-28 22:16:25,271] INFO: Creating WanModelFast from models/lingbot-world-base-cam
+
+[2026-05-28 22:26:55,307] INFO: Generating video ...
+
  0%|          | 0/36 [00:00<?, ?it/s]
  0%|          | 0/36 [00:00<?, ?it/s]
  0%|          | 0/36 [00:00<?, ?it/s]
  0%|          | 0/36 [00:00<?, ?it/s]
  3%|▎         | 1/36 [00:03<01:54,  3.28s/it]
  3%|▎         | 1/36 [00:03<01:55,  3.29s/it]
  3%|▎         | 1/36 [00:03<01:54,  3.27s/it]
  3%|▎         | 1/36 [00:03<01:54,  3.28s/it]
  6%|▌         | 2/36 [00:04<01:09,  2.06s/it]
  6%|▌         | 2/36 [00:04<01:10,  2.07s/it]
  6%|▌         | 2/36 [00:04<01:10,  2.06s/it]
  6%|▌         | 2/36 [00:04<01:09,  2.06s/it]
  8%|▊         | 3/36 [00:05<00:55,  1.68s/it]
  8%|▊         | 3/36 [00:05<00:55,  1.68s/it]
  8%|▊         | 3/36 [00:05<00:55,  1.68s/it]
  8%|▊         | 3/36 [00:05<00:55,  1.68s/it]
 11%|█         | 4/36 [00:06<00:48,  1.51s/it]
 11%|█         | 4/36 [00:06<00:48,  1.51s/it]
 11%|█         | 4/36 [00:06<00:48,  1.51s/it]
 11%|█         | 4/36 [00:06<00:48,  1.51s/it]
 14%|█▍        | 5/36 [00:08<00:43,  1.42s/it]
 14%|█▍        | 5/36 [00:08<00:43,  1.42s/it]
 14%|█▍        | 5/36 [00:08<00:43,  1.42s/it]
 14%|█▍        | 5/36 [00:08<00:44,  1.42s/it]
 17%|█▋        | 6/36 [00:09<00:41,  1.37s/it]
 17%|█▋        | 6/36 [00:09<00:41,  1.37s/it]
 17%|█▋        | 6/36 [00:09<00:41,  1.37s/it]
 17%|█▋        | 6/36 [00:09<00:41,  1.37s/it]
 19%|█▉        | 7/36 [00:10<00:39,  1.35s/it]
 19%|█▉        | 7/36 [00:10<00:39,  1.35s/it]
 19%|█▉        | 7/36 [00:10<00:39,  1.35s/it]
 19%|█▉        | 7/36 [00:10<00:39,  1.35s/it]
 22%|██▏       | 8/36 [00:12<00:37,  1.34s/it]
 22%|██▏       | 8/36 [00:12<00:37,  1.34s/it]
 22%|██▏       | 8/36 [00:12<00:37,  1.34s/it]
 22%|██▏       | 8/36 [00:12<00:37,  1.34s/it]
 25%|██▌       | 9/36 [00:13<00:36,  1.34s/it]
 25%|██▌       | 9/36 [00:13<00:36,  1.34s/it]
 25%|██▌       | 9/36 [00:13<00:36,  1.34s/it]
 25%|██▌       | 9/36 [00:13<00:36,  1.34s/it]
 28%|██▊       | 10/36 [00:14<00:34,  1.35s/it]
 28%|██▊       | 10/36 [00:14<00:34,  1.34s/it]
 28%|██▊       | 10/36 [00:14<00:34,  1.35s/it]
 28%|██▊       | 10/36 [00:14<00:34,  1.34s/it]
 31%|███       | 11/36 [00:16<00:33,  1.35s/it]
 31%|███       | 11/36 [00:16<00:33,  1.35s/it]
 31%|███       | 11/36 [00:16<00:33,  1.35s/it]
 31%|███       | 11/36 [00:16<00:33,  1.35s/it]
 33%|███▎      | 12/36 [00:17<00:32,  1.37s/it]
 33%|███▎      | 12/36 [00:17<00:32,  1.37s/it]
 33%|███▎      | 12/36 [00:17<00:32,  1.37s/it]
 33%|███▎      | 12/36 [00:17<00:32,  1.37s/it]
 36%|███▌      | 13/36 [00:19<00:31,  1.38s/it]
 36%|███▌      | 13/36 [00:19<00:31,  1.38s/it]
 36%|███▌      | 13/36 [00:18<00:31,  1.38s/it]
 36%|███▌      | 13/36 [00:19<00:31,  1.38s/it]
 39%|███▉      | 14/36 [00:20<00:30,  1.40s/it]
 39%|███▉      | 14/36 [00:20<00:30,  1.40s/it]
 39%|███▉      | 14/36 [00:20<00:30,  1.40s/it]
 39%|███▉      | 14/36 [00:20<00:30,  1.40s/it]
 42%|████▏     | 15/36 [00:21<00:29,  1.42s/it]
 42%|████▏     | 15/36 [00:21<00:29,  1.42s/it]
 42%|████▏     | 15/36 [00:21<00:29,  1.42s/it]
 42%|████▏     | 15/36 [00:21<00:29,  1.42s/it]
 44%|████▍     | 16/36 [00:23<00:28,  1.43s/it]
 44%|████▍     | 16/36 [00:23<00:28,  1.43s/it]
 44%|████▍     | 16/36 [00:23<00:28,  1.43s/it]
 44%|████▍     | 16/36 [00:23<00:28,  1.43s/it]
 47%|████▋     | 17/36 [00:24<00:27,  1.45s/it]
 47%|████▋     | 17/36 [00:24<00:27,  1.45s/it]
 47%|████▋     | 17/36 [00:24<00:27,  1.45s/it]
 47%|████▋     | 17/36 [00:24<00:27,  1.45s/it]
 50%|█████     | 18/36 [00:26<00:26,  1.47s/it]
 50%|█████     | 18/36 [00:26<00:26,  1.47s/it]
 50%|█████     | 18/36 [00:26<00:26,  1.47s/it]
 50%|█████     | 18/36 [00:26<00:26,  1.47s/it]
 53%|█████▎    | 19/36 [00:27<00:25,  1.49s/it]
 53%|█████▎    | 19/36 [00:27<00:25,  1.49s/it]
 53%|█████▎    | 19/36 [00:27<00:25,  1.49s/it]
 53%|█████▎    | 19/36 [00:27<00:25,  1.49s/it]
 56%|█████▌    | 20/36 [00:29<00:24,  1.51s/it]
 56%|█████▌    | 20/36 [00:29<00:24,  1.51s/it]
 56%|█████▌    | 20/36 [00:29<00:24,  1.51s/it]
 56%|█████▌    | 20/36 [00:29<00:24,  1.51s/it]
 58%|█████▊    | 21/36 [00:31<00:22,  1.53s/it]
 58%|█████▊    | 21/36 [00:31<00:22,  1.53s/it]
 58%|█████▊    | 21/36 [00:31<00:22,  1.53s/it]
 58%|█████▊    | 21/36 [00:31<00:22,  1.53s/it]
 61%|██████    | 22/36 [00:32<00:21,  1.54s/it]
 61%|██████    | 22/36 [00:32<00:21,  1.55s/it]
 61%|██████    | 22/36 [00:32<00:21,  1.54s/it]
 61%|██████    | 22/36 [00:32<00:21,  1.54s/it]
 64%|██████▍   | 23/36 [00:34<00:20,  1.56s/it]
 64%|██████▍   | 23/36 [00:34<00:20,  1.56s/it]
 64%|██████▍   | 23/36 [00:34<00:20,  1.56s/it]
 64%|██████▍   | 23/36 [00:34<00:20,  1.56s/it]
 67%|██████▋   | 24/36 [00:35<00:18,  1.58s/it]
 67%|██████▋   | 24/36 [00:35<00:18,  1.58s/it]
 67%|██████▋   | 24/36 [00:35<00:18,  1.58s/it]
 67%|██████▋   | 24/36 [00:35<00:18,  1.58s/it]
 69%|██████▉   | 25/36 [00:37<00:17,  1.60s/it]
 69%|██████▉   | 25/36 [00:37<00:17,  1.60s/it]
 69%|██████▉   | 25/36 [00:37<00:17,  1.60s/it]
 69%|██████▉   | 25/36 [00:37<00:17,  1.60s/it]
 72%|███████▏  | 26/36 [00:39<00:16,  1.62s/it]
 72%|███████▏  | 26/36 [00:39<00:16,  1.62s/it]
 72%|███████▏  | 26/36 [00:39<00:16,  1.62s/it]
 72%|███████▏  | 26/36 [00:39<00:16,  1.62s/it]
 75%|███████▌  | 27/36 [00:40<00:14,  1.64s/it]
 75%|███████▌  | 27/36 [00:40<00:14,  1.64s/it]
 75%|███████▌  | 27/36 [00:40<00:14,  1.64s/it]
 75%|███████▌  | 27/36 [00:40<00:14,  1.64s/it]
 78%|███████▊  | 28/36 [00:42<00:13,  1.66s/it]
 78%|███████▊  | 28/36 [00:42<00:13,  1.66s/it]
 78%|███████▊  | 28/36 [00:42<00:13,  1.66s/it]
 78%|███████▊  | 28/36 [00:42<00:13,  1.66s/it]
 81%|████████  | 29/36 [00:44<00:11,  1.68s/it]
 81%|████████  | 29/36 [00:44<00:11,  1.68s/it]
 81%|████████  | 29/36 [00:44<00:11,  1.68s/it]
 81%|████████  | 29/36 [00:44<00:11,  1.68s/it]
 83%|████████▎ | 30/36 [00:46<00:10,  1.70s/it]
 83%|████████▎ | 30/36 [00:46<00:10,  1.70s/it]
 83%|████████▎ | 30/36 [00:46<00:10,  1.70s/it]
 83%|████████▎ | 30/36 [00:46<00:10,  1.70s/it]
 86%|████████▌ | 31/36 [00:47<00:08,  1.72s/it]
 86%|████████▌ | 31/36 [00:47<00:08,  1.72s/it]
 86%|████████▌ | 31/36 [00:47<00:08,  1.72s/it]
 86%|████████▌ | 31/36 [00:47<00:08,  1.72s/it]
 89%|████████▉ | 32/36 [00:49<00:06,  1.74s/it]
 89%|████████▉ | 32/36 [00:49<00:06,  1.74s/it]
 89%|████████▉ | 32/36 [00:49<00:06,  1.74s/it]
 89%|████████▉ | 32/36 [00:49<00:06,  1.74s/it]
 92%|█████████▏| 33/36 [00:51<00:05,  1.75s/it]
 92%|█████████▏| 33/36 [00:51<00:05,  1.75s/it]
 92%|█████████▏| 33/36 [00:51<00:05,  1.75s/it]
 92%|█████████▏| 33/36 [00:51<00:05,  1.75s/it]
 94%|█████████▍| 34/36 [00:53<00:03,  1.77s/it]
 94%|█████████▍| 34/36 [00:53<00:03,  1.77s/it]
 94%|█████████▍| 34/36 [00:53<00:03,  1.77s/it]
 94%|█████████▍| 34/36 [00:53<00:03,  1.77s/it]
 97%|█████████▋| 35/36 [00:55<00:01,  1.79s/it]
 97%|█████████▋| 35/36 [00:55<00:01,  1.79s/it]
 97%|█████████▋| 35/36 [00:55<00:01,  1.79s/it]
 97%|█████████▋| 35/36 [00:55<00:01,  1.79s/it]
+
+
+
+[2026-05-28 22:28:12,079] INFO: Saving generated video to experiments/fast_chunk_ablation_20260528/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4
+[2026-05-28 22:28:14,530] INFO: Finished.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/logs/example05_chunk02_seed6200.log

@@ -0,0 +1,23 @@
+Command: torchrun --nproc_per_node 4 --master_port 17599 generate_fast.py --task i2v-A14B --size '480*832' --ckpt_dir models/lingbot-world-base-cam --image examples/05/image.jpg --action_path examples/05 --dit_fsdp --t5_fsdp --ulysses_size 4 --frame_num 141 --base_seed 6200 --save_file experiments/fast_chunk_ablation_20260528/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4 --prompt 'A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.' --chunk_size 2
+W0528 22:14:50.260000 927364 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] 
+W0528 22:14:50.260000 927364 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+W0528 22:14:50.260000 927364 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed. 
+W0528 22:14:50.260000 927364 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+[2026-05-28 22:15:15,623] INFO: offload_model is not specified, set to False.
+[2026-05-28 22:15:15,671] INFO: Generation job args: Namespace(task='i2v-A14B', size='480*832', frame_num=141, ckpt_dir='models/lingbot-world-base-cam', offload_model=False, ulysses_size=4, t5_fsdp=True, t5_cpu=False, dit_fsdp=True, save_file='experiments/fast_chunk_ablation_20260528/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4', prompt='A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.', prompt_b=None, switch_frame=None, prompt_switch_case=None, use_prompt_extend=False, base_seed=6200, image='examples/05/image.jpg', action_path='examples/05', sample_shift=10.0, convert_model_dtype=False, local_attn_size=-1, sink_size=0, max_attention_size=None, chunk_size=2, save_dir='output')
+[2026-05-28 22:15:15,671] INFO: Generation model config: {'__name__': 'Config: Wan I2V A14B', 't5_model': 'umt5_xxl', 't5_dtype': torch.bfloat16, 'text_len': 512, 'param_dtype': torch.bfloat16, 'num_train_timesteps': 1000, 'sample_fps': 16, 'sample_neg_prompt': '画面突变，色调艳丽，过曝，静态，细节模糊不清，字幕，风格，作品，画作，画面，静止，整体发灰，最差质量，低质量，JPEG压缩残留，丑陋的，残缺的，多余的手指，画得不好的手部，画得不好的脸部，畸形的，毁容的，形态畸形的肢体，手指融合，静止不动的画面，杂乱的背景，三条腿，背景人很多，倒着走，镜头晃动，画面闪烁，模糊，噪点，水印，签名，文字，变形，扭曲，液化，不合逻辑的结构，卡顿，PPT幻灯片感，过暗，欠曝，低对比度，霓虹灯光感，过度锐化，3D渲染感，人物，行人，游客，身体，皮肤，肢体，面部特征，汽车，电线', 'frame_num': 81, 't5_checkpoint': 'models_t5_umt5-xxl-enc-bf16.pth', 't5_tokenizer': 'google/umt5-xxl', 'vae_checkpoint': 'Wan2.1_VAE.pth', 'vae_stride': (4, 8, 8), 'patch_size': (1, 2, 2), 'dim': 5120, 'ffn_dim': 13824, 'freq_dim': 256, 'num_heads': 40, 'num_layers': 40, 'window_size': (-1, -1), 'qk_norm': True, 'cross_attn_norm': True, 'eps': 1e-06, 'low_noise_checkpoint': 'low_noise_model', 'high_noise_checkpoint': 'high_noise_model', 'fast_noise_checkpoint': 'lingbot_world_fast', 'sample_shift': 10.0, 'sample_steps': 70, 'boundary': 0.947, 'sample_guide_scale': (5.0, 5.0)}
+NCCL version 2.21.5+cuda12.4
+[2026-05-28 22:15:18,285] INFO: Input prompt: A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.
+[2026-05-28 22:15:18,341] INFO: Input image: examples/05/image.jpg
+[2026-05-28 22:15:18,341] INFO: Creating WanI2VFast pipeline.
+[2026-05-28 22:16:06,920] INFO: loading models/lingbot-world-base-cam/models_t5_umt5-xxl-enc-bf16.pth
+[2026-05-28 22:16:24,072] INFO: loading models/lingbot-world-base-cam/Wan2.1_VAE.pth
+[2026-05-28 22:16:25,335] INFO: Creating WanModelFast from models/lingbot-world-base-cam
+
+[2026-05-28 22:26:57,990] INFO: Generating video ...
+
  0%|          | 0/18 [00:00<?, ?it/s]
  0%|          | 0/18 [00:00<?, ?it/s]
  0%|          | 0/18 [00:00<?, ?it/s]
  0%|          | 0/18 [00:00<?, ?it/s]
  6%|▌         | 1/18 [00:03<01:04,  3.77s/it]
  6%|▌         | 1/18 [00:03<01:03,  3.76s/it]
  6%|▌         | 1/18 [00:03<01:04,  3.77s/it]
  6%|▌         | 1/18 [00:03<01:04,  3.77s/it]
 11%|█         | 2/18 [00:05<00:42,  2.63s/it]
 11%|█         | 2/18 [00:05<00:42,  2.63s/it]
 11%|█         | 2/18 [00:05<00:42,  2.63s/it]
 11%|█         | 2/18 [00:05<00:42,  2.63s/it]
 17%|█▋        | 3/18 [00:07<00:34,  2.29s/it]
 17%|█▋        | 3/18 [00:07<00:34,  2.29s/it]
 17%|█▋        | 3/18 [00:07<00:34,  2.29s/it]
 17%|█▋        | 3/18 [00:07<00:34,  2.29s/it]
 22%|██▏       | 4/18 [00:09<00:30,  2.16s/it]
 22%|██▏       | 4/18 [00:09<00:30,  2.15s/it]
 22%|██▏       | 4/18 [00:09<00:30,  2.15s/it]
 22%|██▏       | 4/18 [00:09<00:30,  2.15s/it]
 28%|██▊       | 5/18 [00:11<00:27,  2.10s/it]
 28%|██▊       | 5/18 [00:11<00:27,  2.10s/it]
 28%|██▊       | 5/18 [00:11<00:27,  2.10s/it]
 28%|██▊       | 5/18 [00:11<00:27,  2.10s/it]
 33%|███▎      | 6/18 [00:13<00:25,  2.09s/it]
 33%|███▎      | 6/18 [00:13<00:25,  2.09s/it]
 33%|███▎      | 6/18 [00:13<00:25,  2.09s/it]
 33%|███▎      | 6/18 [00:13<00:25,  2.09s/it]
 39%|███▉      | 7/18 [00:15<00:23,  2.10s/it]
 39%|███▉      | 7/18 [00:15<00:23,  2.10s/it]
 39%|███▉      | 7/18 [00:15<00:23,  2.10s/it]
 39%|███▉      | 7/18 [00:15<00:23,  2.10s/it]
 44%|████▍     | 8/18 [00:17<00:21,  2.13s/it]
 44%|████▍     | 8/18 [00:17<00:21,  2.13s/it]
 44%|████▍     | 8/18 [00:17<00:21,  2.13s/it]
 44%|████▍     | 8/18 [00:17<00:21,  2.13s/it]
 50%|█████     | 9/18 [00:20<00:19,  2.16s/it]
 50%|█████     | 9/18 [00:20<00:19,  2.16s/it]
 50%|█████     | 9/18 [00:20<00:19,  2.16s/it]
 50%|█████     | 9/18 [00:20<00:19,  2.16s/it]
 56%|█████▌    | 10/18 [00:22<00:17,  2.21s/it]
 56%|█████▌    | 10/18 [00:22<00:17,  2.21s/it]
 56%|█████▌    | 10/18 [00:22<00:17,  2.21s/it]
 56%|█████▌    | 10/18 [00:22<00:17,  2.21s/it]
 61%|██████    | 11/18 [00:24<00:15,  2.25s/it]
 61%|██████    | 11/18 [00:24<00:15,  2.25s/it]
 61%|██████    | 11/18 [00:24<00:15,  2.25s/it]
 61%|██████    | 11/18 [00:24<00:15,  2.25s/it]
 67%|██████▋   | 12/18 [00:27<00:13,  2.31s/it]
 67%|██████▋   | 12/18 [00:27<00:13,  2.31s/it]
 67%|██████▋   | 12/18 [00:27<00:13,  2.31s/it]
 67%|██████▋   | 12/18 [00:27<00:13,  2.31s/it]
 72%|███████▏  | 13/18 [00:29<00:11,  2.36s/it]
 72%|███████▏  | 13/18 [00:29<00:11,  2.36s/it]
 72%|███████▏  | 13/18 [00:29<00:11,  2.36s/it]
 72%|███████▏  | 13/18 [00:29<00:11,  2.36s/it]
 78%|███████▊  | 14/18 [00:32<00:09,  2.43s/it]
 78%|███████▊  | 14/18 [00:32<00:09,  2.43s/it]
 78%|███████▊  | 14/18 [00:32<00:09,  2.43s/it]
 78%|███████▊  | 14/18 [00:32<00:09,  2.43s/it]
 83%|████████▎ | 15/18 [00:34<00:07,  2.48s/it]
 83%|████████▎ | 15/18 [00:34<00:07,  2.48s/it]
 83%|████████▎ | 15/18 [00:34<00:07,  2.48s/it]
 83%|████████▎ | 15/18 [00:34<00:07,  2.48s/it]
 89%|████████▉ | 16/18 [00:37<00:05,  2.54s/it]
 89%|████████▉ | 16/18 [00:37<00:05,  2.54s/it]
 89%|████████▉ | 16/18 [00:37<00:05,  2.54s/it]
 89%|████████▉ | 16/18 [00:37<00:05,  2.54s/it]
 94%|█████████▍| 17/18 [00:40<00:02,  2.60s/it]
 94%|█████████▍| 17/18 [00:40<00:02,  2.60s/it]
 94%|█████████▍| 17/18 [00:40<00:02,  2.60s/it]
 94%|█████████▍| 17/18 [00:40<00:02,  2.60s/it]
+
+
+
+[2026-05-28 22:27:58,166] INFO: Saving generated video to experiments/fast_chunk_ablation_20260528/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4
+[2026-05-28 22:28:00,893] INFO: Finished.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/logs/example05_chunk03_seed6200.log

@@ -0,0 +1,23 @@
+Command: torchrun --nproc_per_node 4 --master_port 37172 generate_fast.py --task i2v-A14B --size '480*832' --ckpt_dir models/lingbot-world-base-cam --image examples/05/image.jpg --action_path examples/05 --dit_fsdp --t5_fsdp --ulysses_size 4 --frame_num 141 --base_seed 6200 --save_file experiments/fast_chunk_ablation_20260528/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4 --prompt 'A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.' --chunk_size 3
+W0528 22:28:20.233000 938938 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] 
+W0528 22:28:20.233000 938938 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+W0528 22:28:20.233000 938938 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed. 
+W0528 22:28:20.233000 938938 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+[2026-05-28 22:28:28,830] INFO: offload_model is not specified, set to False.
+[2026-05-28 22:28:28,845] INFO: Generation job args: Namespace(task='i2v-A14B', size='480*832', frame_num=141, ckpt_dir='models/lingbot-world-base-cam', offload_model=False, ulysses_size=4, t5_fsdp=True, t5_cpu=False, dit_fsdp=True, save_file='experiments/fast_chunk_ablation_20260528/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4', prompt='A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.', prompt_b=None, switch_frame=None, prompt_switch_case=None, use_prompt_extend=False, base_seed=6200, image='examples/05/image.jpg', action_path='examples/05', sample_shift=10.0, convert_model_dtype=False, local_attn_size=-1, sink_size=0, max_attention_size=None, chunk_size=3, save_dir='output')
+[2026-05-28 22:28:28,845] INFO: Generation model config: {'__name__': 'Config: Wan I2V A14B', 't5_model': 'umt5_xxl', 't5_dtype': torch.bfloat16, 'text_len': 512, 'param_dtype': torch.bfloat16, 'num_train_timesteps': 1000, 'sample_fps': 16, 'sample_neg_prompt': '画面突变，色调艳丽，过曝，静态，细节模糊不清，字幕，风格，作品，画作，画面，静止，整体发灰，最差质量，低质量，JPEG压缩残留，丑陋的，残缺的，多余的手指，画得不好的手部，画得不好的脸部，畸形的，毁容的，形态畸形的肢体，手指融合，静止不动的画面，杂乱的背景，三条腿，背景人很多，倒着走，镜头晃动，画面闪烁，模糊，噪点，水印，签名，文字，变形，扭曲，液化，不合逻辑的结构，卡顿，PPT幻灯片感，过暗，欠曝，低对比度，霓虹灯光感，过度锐化，3D渲染感，人物，行人，游客，身体，皮肤，肢体，面部特征，汽车，电线', 'frame_num': 81, 't5_checkpoint': 'models_t5_umt5-xxl-enc-bf16.pth', 't5_tokenizer': 'google/umt5-xxl', 'vae_checkpoint': 'Wan2.1_VAE.pth', 'vae_stride': (4, 8, 8), 'patch_size': (1, 2, 2), 'dim': 5120, 'ffn_dim': 13824, 'freq_dim': 256, 'num_heads': 40, 'num_layers': 40, 'window_size': (-1, -1), 'qk_norm': True, 'cross_attn_norm': True, 'eps': 1e-06, 'low_noise_checkpoint': 'low_noise_model', 'high_noise_checkpoint': 'high_noise_model', 'fast_noise_checkpoint': 'lingbot_world_fast', 'sample_shift': 10.0, 'sample_steps': 70, 'boundary': 0.947, 'sample_guide_scale': (5.0, 5.0)}
+NCCL version 2.21.5+cuda12.4
+[2026-05-28 22:28:30,330] INFO: Input prompt: A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.
+[2026-05-28 22:28:30,340] INFO: Input image: examples/05/image.jpg
+[2026-05-28 22:28:30,340] INFO: Creating WanI2VFast pipeline.
+[2026-05-28 22:29:18,913] INFO: loading models/lingbot-world-base-cam/models_t5_umt5-xxl-enc-bf16.pth
+[2026-05-28 22:29:23,264] INFO: loading models/lingbot-world-base-cam/Wan2.1_VAE.pth
+[2026-05-28 22:29:23,417] INFO: Creating WanModelFast from models/lingbot-world-base-cam
+
+[2026-05-28 22:30:05,128] INFO: Generating video ...
+
  0%|          | 0/12 [00:00<?, ?it/s]
  0%|          | 0/12 [00:00<?, ?it/s]
  0%|          | 0/12 [00:00<?, ?it/s]
  0%|          | 0/12 [00:00<?, ?it/s]
  8%|▊         | 1/12 [00:03<00:34,  3.12s/it]
  8%|▊         | 1/12 [00:03<00:35,  3.22s/it]
  8%|▊         | 1/12 [00:03<00:33,  3.01s/it]
  8%|▊         | 1/12 [00:03<00:34,  3.12s/it]
 17%|█▋        | 2/12 [00:05<00:27,  2.76s/it]
 17%|█▋        | 2/12 [00:05<00:27,  2.72s/it]
 17%|█▋        | 2/12 [00:05<00:26,  2.68s/it]
 17%|█▋        | 2/12 [00:05<00:27,  2.72s/it]
 25%|██▌       | 3/12 [00:08<00:24,  2.67s/it]
 25%|██▌       | 3/12 [00:08<00:23,  2.62s/it]
 25%|██▌       | 3/12 [00:08<00:23,  2.65s/it]
 25%|██▌       | 3/12 [00:08<00:23,  2.65s/it]
 33%|███▎      | 4/12 [00:10<00:21,  2.67s/it]
 33%|███▎      | 4/12 [00:10<00:21,  2.66s/it]
 33%|███▎      | 4/12 [00:10<00:21,  2.66s/it]
 33%|███▎      | 4/12 [00:10<00:21,  2.64s/it]
 42%|████▏     | 5/12 [00:13<00:19,  2.72s/it]
 42%|████▏     | 5/12 [00:13<00:18,  2.70s/it]
 42%|████▏     | 5/12 [00:13<00:18,  2.71s/it]
 42%|████▏     | 5/12 [00:13<00:18,  2.71s/it]
 50%|█████     | 6/12 [00:16<00:16,  2.79s/it]
 50%|█████     | 6/12 [00:16<00:16,  2.77s/it]
 50%|█████     | 6/12 [00:16<00:16,  2.78s/it]
 50%|█████     | 6/12 [00:16<00:16,  2.78s/it]
 58%|█████▊    | 7/12 [00:19<00:14,  2.87s/it]
 58%|█████▊    | 7/12 [00:19<00:14,  2.86s/it]
 58%|█████▊    | 7/12 [00:19<00:14,  2.87s/it]
 58%|█████▊    | 7/12 [00:19<00:14,  2.87s/it]
 67%|██████▋   | 8/12 [00:22<00:11,  2.96s/it]
 67%|██████▋   | 8/12 [00:22<00:11,  2.96s/it]
 67%|██████▋   | 8/12 [00:22<00:11,  2.96s/it]
 67%|██████▋   | 8/12 [00:22<00:11,  2.96s/it]
 75%|███████▌  | 9/12 [00:26<00:09,  3.06s/it]
 75%|███████▌  | 9/12 [00:25<00:09,  3.06s/it]
 75%|███████▌  | 9/12 [00:25<00:09,  3.06s/it]
 75%|███████▌  | 9/12 [00:25<00:09,  3.06s/it]
 83%|████████▎ | 10/12 [00:29<00:06,  3.17s/it]
 83%|████████▎ | 10/12 [00:29<00:06,  3.17s/it]
 83%|████████▎ | 10/12 [00:29<00:06,  3.17s/it]
 83%|████████▎ | 10/12 [00:29<00:06,  3.17s/it]
 92%|█████████▏| 11/12 [00:33<00:03,  3.28s/it]
 92%|█████████▏| 11/12 [00:32<00:03,  3.28s/it]
 92%|█████████▏| 11/12 [00:32<00:03,  3.28s/it]
 92%|█████████▏| 11/12 [00:32<00:03,  3.28s/it]
+
+
+
+[2026-05-28 22:30:58,348] INFO: Saving generated video to experiments/fast_chunk_ablation_20260528/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4
+[2026-05-28 22:31:00,772] INFO: Finished.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/logs/example05_chunk04_seed6200.log

@@ -0,0 +1,23 @@
+Command: torchrun --nproc_per_node 4 --master_port 37113 generate_fast.py --task i2v-A14B --size '480*832' --ckpt_dir models/lingbot-world-base-cam --image examples/05/image.jpg --action_path examples/05 --dit_fsdp --t5_fsdp --ulysses_size 4 --frame_num 141 --base_seed 6200 --save_file experiments/fast_chunk_ablation_20260528/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200.mp4 --prompt 'A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.' --chunk_size 4
+W0528 22:46:21.287000 942796 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] 
+W0528 22:46:21.287000 942796 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+W0528 22:46:21.287000 942796 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed. 
+W0528 22:46:21.287000 942796 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+[2026-05-28 22:46:55,215] INFO: offload_model is not specified, set to False.
+[2026-05-28 22:46:55,269] INFO: Generation job args: Namespace(task='i2v-A14B', size='480*832', frame_num=141, ckpt_dir='models/lingbot-world-base-cam', offload_model=False, ulysses_size=4, t5_fsdp=True, t5_cpu=False, dit_fsdp=True, save_file='experiments/fast_chunk_ablation_20260528/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200.mp4', prompt='A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.', prompt_b=None, switch_frame=None, prompt_switch_case=None, use_prompt_extend=False, base_seed=6200, image='examples/05/image.jpg', action_path='examples/05', sample_shift=10.0, convert_model_dtype=False, local_attn_size=-1, sink_size=0, max_attention_size=None, chunk_size=4, save_dir='output')
+[2026-05-28 22:46:55,270] INFO: Generation model config: {'__name__': 'Config: Wan I2V A14B', 't5_model': 'umt5_xxl', 't5_dtype': torch.bfloat16, 'text_len': 512, 'param_dtype': torch.bfloat16, 'num_train_timesteps': 1000, 'sample_fps': 16, 'sample_neg_prompt': '画面突变，色调艳丽，过曝，静态，细节模糊不清，字幕，风格，作品，画作，画面，静止，整体发灰，最差质量，低质量，JPEG压缩残留，丑陋的，残缺的，多余的手指，画得不好的手部，画得不好的脸部，畸形的，毁容的，形态畸形的肢体，手指融合，静止不动的画面，杂乱的背景，三条腿，背景人很多，倒着走，镜头晃动，画面闪烁，模糊，噪点，水印，签名，文字，变形，扭曲，液化，不合逻辑的结构，卡顿，PPT幻灯片感，过暗，欠曝，低对比度，霓虹灯光感，过度锐化，3D渲染感，人物，行人，游客，身体，皮肤，肢体，面部特征，汽车，电线', 'frame_num': 81, 't5_checkpoint': 'models_t5_umt5-xxl-enc-bf16.pth', 't5_tokenizer': 'google/umt5-xxl', 'vae_checkpoint': 'Wan2.1_VAE.pth', 'vae_stride': (4, 8, 8), 'patch_size': (1, 2, 2), 'dim': 5120, 'ffn_dim': 13824, 'freq_dim': 256, 'num_heads': 40, 'num_layers': 40, 'window_size': (-1, -1), 'qk_norm': True, 'cross_attn_norm': True, 'eps': 1e-06, 'low_noise_checkpoint': 'low_noise_model', 'high_noise_checkpoint': 'high_noise_model', 'fast_noise_checkpoint': 'lingbot_world_fast', 'sample_shift': 10.0, 'sample_steps': 70, 'boundary': 0.947, 'sample_guide_scale': (5.0, 5.0)}
+NCCL version 2.21.5+cuda12.4
+[2026-05-28 22:46:57,166] INFO: Input prompt: A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.
+[2026-05-28 22:46:57,251] INFO: Input image: examples/05/image.jpg
+[2026-05-28 22:46:57,251] INFO: Creating WanI2VFast pipeline.
+[2026-05-28 22:47:48,686] INFO: loading models/lingbot-world-base-cam/models_t5_umt5-xxl-enc-bf16.pth
+[2026-05-28 22:48:08,625] INFO: loading models/lingbot-world-base-cam/Wan2.1_VAE.pth
+[2026-05-28 22:48:10,029] INFO: Creating WanModelFast from models/lingbot-world-base-cam
+
+[2026-05-28 22:58:09,406] INFO: Generating video ...
+
  0%|          | 0/9 [00:00<?, ?it/s]
  0%|          | 0/9 [00:00<?, ?it/s]
  0%|          | 0/9 [00:00<?, ?it/s]
  0%|          | 0/9 [00:00<?, ?it/s]
 11%|█         | 1/9 [00:04<00:35,  4.44s/it]
 11%|█         | 1/9 [00:04<00:35,  4.48s/it]
 11%|█         | 1/9 [00:04<00:35,  4.46s/it]
 11%|█         | 1/9 [00:04<00:35,  4.43s/it]
 22%|██▏       | 2/9 [00:07<00:25,  3.70s/it]
 22%|██▏       | 2/9 [00:07<00:25,  3.69s/it]
 22%|██▏       | 2/9 [00:07<00:25,  3.70s/it]
 22%|██▏       | 2/9 [00:07<00:25,  3.68s/it]
 33%|███▎      | 3/9 [00:11<00:21,  3.55s/it]
 33%|███▎      | 3/9 [00:10<00:21,  3.54s/it]
 33%|███▎      | 3/9 [00:10<00:21,  3.54s/it]
 33%|███▎      | 3/9 [00:10<00:21,  3.54s/it]
 44%|████▍     | 4/9 [00:14<00:17,  3.55s/it]
 44%|████▍     | 4/9 [00:14<00:17,  3.55s/it]
 44%|████▍     | 4/9 [00:14<00:17,  3.55s/it]
 44%|████▍     | 4/9 [00:14<00:17,  3.55s/it]
 56%|█████▌    | 5/9 [00:18<00:14,  3.63s/it]
 56%|█████▌    | 5/9 [00:18<00:14,  3.63s/it]
 56%|█████▌    | 5/9 [00:18<00:14,  3.63s/it]
 56%|█████▌    | 5/9 [00:18<00:14,  3.63s/it]
 67%|██████▋   | 6/9 [00:22<00:11,  3.75s/it]
 67%|██████▋   | 6/9 [00:22<00:11,  3.74s/it]
 67%|██████▋   | 6/9 [00:22<00:11,  3.74s/it]
 67%|██████▋   | 6/9 [00:22<00:11,  3.74s/it]
 78%|███████▊  | 7/9 [00:26<00:07,  3.89s/it]
 78%|███████▊  | 7/9 [00:26<00:07,  3.88s/it]
 78%|███████▊  | 7/9 [00:26<00:07,  3.88s/it]
 78%|███████▊  | 7/9 [00:26<00:07,  3.88s/it]
 89%|████████▉ | 8/9 [00:30<00:04,  4.04s/it]
 89%|████████▉ | 8/9 [00:30<00:04,  4.04s/it]
 89%|████████▉ | 8/9 [00:30<00:04,  4.04s/it]
 89%|████████▉ | 8/9 [00:30<00:04,  4.04s/it]
+
+
+
+[2026-05-28 22:59:06,451] INFO: Saving generated video to experiments/fast_chunk_ablation_20260528/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200.mp4
+[2026-05-28 22:59:09,381] INFO: Finished.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/logs/example05_chunk06_seed6200.log

@@ -0,0 +1,23 @@
+Command: torchrun --nproc_per_node 4 --master_port 55131 generate_fast.py --task i2v-A14B --size '480*832' --ckpt_dir models/lingbot-world-base-cam --image examples/05/image.jpg --action_path examples/05 --dit_fsdp --t5_fsdp --ulysses_size 4 --frame_num 141 --base_seed 6200 --save_file experiments/fast_chunk_ablation_20260528/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200.mp4 --prompt 'A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.' --chunk_size 6
+W0528 22:29:02.368000 940843 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] 
+W0528 22:29:02.368000 940843 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+W0528 22:29:02.368000 940843 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed. 
+W0528 22:29:02.368000 940843 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+[2026-05-28 22:29:11,261] INFO: offload_model is not specified, set to False.
+[2026-05-28 22:29:11,277] INFO: Generation job args: Namespace(task='i2v-A14B', size='480*832', frame_num=141, ckpt_dir='models/lingbot-world-base-cam', offload_model=False, ulysses_size=4, t5_fsdp=True, t5_cpu=False, dit_fsdp=True, save_file='experiments/fast_chunk_ablation_20260528/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200.mp4', prompt='A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.', prompt_b=None, switch_frame=None, prompt_switch_case=None, use_prompt_extend=False, base_seed=6200, image='examples/05/image.jpg', action_path='examples/05', sample_shift=10.0, convert_model_dtype=False, local_attn_size=-1, sink_size=0, max_attention_size=None, chunk_size=6, save_dir='output')
+[2026-05-28 22:29:11,277] INFO: Generation model config: {'__name__': 'Config: Wan I2V A14B', 't5_model': 'umt5_xxl', 't5_dtype': torch.bfloat16, 'text_len': 512, 'param_dtype': torch.bfloat16, 'num_train_timesteps': 1000, 'sample_fps': 16, 'sample_neg_prompt': '画面突变，色调艳丽，过曝，静态，细节模糊不清，字幕，风格，作品，画作，画面，静止，整体发灰，最差质量，低质量，JPEG压缩残留，丑陋的，残缺的，多余的手指，画得不好的手部，画得不好的脸部，畸形的，毁容的，形态畸形的肢体，手指融合，静止不动的画面，杂乱的背景，三条腿，背景人很多，倒着走，镜头晃动，画面闪烁，模糊，噪点，水印，签名，文字，变形，扭曲，液化，不合逻辑的结构，卡顿，PPT幻灯片感，过暗，欠曝，低对比度，霓虹灯光感，过度锐化，3D渲染感，人物，行人，游客，身体，皮肤，肢体，面部特征，汽车，电线', 'frame_num': 81, 't5_checkpoint': 'models_t5_umt5-xxl-enc-bf16.pth', 't5_tokenizer': 'google/umt5-xxl', 'vae_checkpoint': 'Wan2.1_VAE.pth', 'vae_stride': (4, 8, 8), 'patch_size': (1, 2, 2), 'dim': 5120, 'ffn_dim': 13824, 'freq_dim': 256, 'num_heads': 40, 'num_layers': 40, 'window_size': (-1, -1), 'qk_norm': True, 'cross_attn_norm': True, 'eps': 1e-06, 'low_noise_checkpoint': 'low_noise_model', 'high_noise_checkpoint': 'high_noise_model', 'fast_noise_checkpoint': 'lingbot_world_fast', 'sample_shift': 10.0, 'sample_steps': 70, 'boundary': 0.947, 'sample_guide_scale': (5.0, 5.0)}
+NCCL version 2.21.5+cuda12.4
+[2026-05-28 22:29:12,665] INFO: Input prompt: A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.
+[2026-05-28 22:29:12,675] INFO: Input image: examples/05/image.jpg
+[2026-05-28 22:29:12,675] INFO: Creating WanI2VFast pipeline.
+[2026-05-28 22:30:01,978] INFO: loading models/lingbot-world-base-cam/models_t5_umt5-xxl-enc-bf16.pth
+[2026-05-28 22:30:08,358] INFO: loading models/lingbot-world-base-cam/Wan2.1_VAE.pth
+[2026-05-28 22:30:08,554] INFO: Creating WanModelFast from models/lingbot-world-base-cam
+
+[2026-05-28 22:30:46,208] INFO: Generating video ...
+
  0%|          | 0/6 [00:00<?, ?it/s]
  0%|          | 0/6 [00:00<?, ?it/s]
  0%|          | 0/6 [00:00<?, ?it/s]
  0%|          | 0/6 [00:00<?, ?it/s]
 17%|█▋        | 1/6 [00:04<00:24,  4.96s/it]
 17%|█▋        | 1/6 [00:05<00:25,  5.12s/it]
 17%|█▋        | 1/6 [00:04<00:24,  4.96s/it]
 17%|█▋        | 1/6 [00:04<00:24,  4.96s/it]
 33%|███▎      | 2/6 [00:09<00:19,  4.82s/it]
 33%|███▎      | 2/6 [00:09<00:19,  4.82s/it]
 33%|███▎      | 2/6 [00:09<00:19,  4.82s/it]
 33%|███▎      | 2/6 [00:09<00:19,  4.89s/it]
 50%|█████     | 3/6 [00:14<00:14,  4.97s/it]
 50%|█████     | 3/6 [00:14<00:14,  4.97s/it]
 50%|█████     | 3/6 [00:14<00:14,  4.97s/it]
 50%|█████     | 3/6 [00:14<00:15,  5.01s/it]
 67%|██████▋   | 4/6 [00:20<00:10,  5.23s/it]
 67%|██████▋   | 4/6 [00:20<00:10,  5.21s/it]
 67%|██████▋   | 4/6 [00:20<00:10,  5.21s/it]
 67%|██████▋   | 4/6 [00:20<00:10,  5.21s/it]
 83%|████████▎ | 5/6 [00:26<00:05,  5.51s/it]
 83%|████████▎ | 5/6 [00:26<00:05,  5.50s/it]
 83%|████████▎ | 5/6 [00:26<00:05,  5.50s/it]
 83%|████████▎ | 5/6 [00:26<00:05,  5.50s/it]
+
+
+
+[2026-05-28 22:31:35,811] INFO: Saving generated video to experiments/fast_chunk_ablation_20260528/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200.mp4
+[2026-05-28 22:31:38,179] INFO: Finished.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/logs/example05_chunk12_seed6200.log

@@ -0,0 +1,23 @@
+Command: torchrun --nproc_per_node 4 --master_port 21357 generate_fast.py --task i2v-A14B --size '480*832' --ckpt_dir models/lingbot-world-base-cam --image examples/05/image.jpg --action_path examples/05 --dit_fsdp --t5_fsdp --ulysses_size 4 --frame_num 141 --base_seed 6200 --save_file experiments/fast_chunk_ablation_20260528/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200.mp4 --prompt 'A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.' --chunk_size 12
+W0528 22:31:18.606000 944637 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] 
+W0528 22:31:18.606000 944637 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+W0528 22:31:18.606000 944637 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed. 
+W0528 22:31:18.606000 944637 /lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/miniconda3/envs/lingbot_world_repro/lib/python3.10/site-packages/torch/distributed/run.py:793] *****************************************
+[2026-05-28 22:31:27,278] INFO: offload_model is not specified, set to False.
+[2026-05-28 22:31:27,297] INFO: Generation job args: Namespace(task='i2v-A14B', size='480*832', frame_num=141, ckpt_dir='models/lingbot-world-base-cam', offload_model=False, ulysses_size=4, t5_fsdp=True, t5_cpu=False, dit_fsdp=True, save_file='experiments/fast_chunk_ablation_20260528/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200.mp4', prompt='A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.', prompt_b=None, switch_frame=None, prompt_switch_case=None, use_prompt_extend=False, base_seed=6200, image='examples/05/image.jpg', action_path='examples/05', sample_shift=10.0, convert_model_dtype=False, local_attn_size=-1, sink_size=0, max_attention_size=None, chunk_size=12, save_dir='output')
+[2026-05-28 22:31:27,298] INFO: Generation model config: {'__name__': 'Config: Wan I2V A14B', 't5_model': 'umt5_xxl', 't5_dtype': torch.bfloat16, 'text_len': 512, 'param_dtype': torch.bfloat16, 'num_train_timesteps': 1000, 'sample_fps': 16, 'sample_neg_prompt': '画面突变，色调艳丽，过曝，静态，细节模糊不清，字幕，风格，作品，画作，画面，静止，整体发灰，最差质量，低质量，JPEG压缩残留，丑陋的，残缺的，多余的手指，画得不好的手部，画得不好的脸部，畸形的，毁容的，形态畸形的肢体，手指融合，静止不动的画面，杂乱的背景，三条腿，背景人很多，倒着走，镜头晃动，画面闪烁，模糊，噪点，水印，签名，文字，变形，扭曲，液化，不合逻辑的结构，卡顿，PPT幻灯片感，过暗，欠曝，低对比度，霓虹灯光感，过度锐化，3D渲染感，人物，行人，游客，身体，皮肤，肢体，面部特征，汽车，电线', 'frame_num': 81, 't5_checkpoint': 'models_t5_umt5-xxl-enc-bf16.pth', 't5_tokenizer': 'google/umt5-xxl', 'vae_checkpoint': 'Wan2.1_VAE.pth', 'vae_stride': (4, 8, 8), 'patch_size': (1, 2, 2), 'dim': 5120, 'ffn_dim': 13824, 'freq_dim': 256, 'num_heads': 40, 'num_layers': 40, 'window_size': (-1, -1), 'qk_norm': True, 'cross_attn_norm': True, 'eps': 1e-06, 'low_noise_checkpoint': 'low_noise_model', 'high_noise_checkpoint': 'high_noise_model', 'fast_noise_checkpoint': 'lingbot_world_fast', 'sample_shift': 10.0, 'sample_steps': 70, 'boundary': 0.947, 'sample_guide_scale': (5.0, 5.0)}
+NCCL version 2.21.5+cuda12.4
+[2026-05-28 22:31:28,787] INFO: Input prompt: A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.
+[2026-05-28 22:31:28,798] INFO: Input image: examples/05/image.jpg
+[2026-05-28 22:31:28,798] INFO: Creating WanI2VFast pipeline.
+[2026-05-28 22:32:19,468] INFO: loading models/lingbot-world-base-cam/models_t5_umt5-xxl-enc-bf16.pth
+[2026-05-28 22:32:37,734] INFO: loading models/lingbot-world-base-cam/Wan2.1_VAE.pth
+[2026-05-28 22:32:37,918] INFO: Creating WanModelFast from models/lingbot-world-base-cam
+
+[2026-05-28 22:33:21,545] INFO: Generating video ...
+
  0%|          | 0/3 [00:00<?, ?it/s]
  0%|          | 0/3 [00:00<?, ?it/s]
  0%|          | 0/3 [00:00<?, ?it/s]
  0%|          | 0/3 [00:00<?, ?it/s]
 33%|███▎      | 1/3 [00:09<00:18,  9.47s/it]
 33%|███▎      | 1/3 [00:09<00:19,  9.53s/it]
 33%|███▎      | 1/3 [00:09<00:19,  9.53s/it]
 33%|███▎      | 1/3 [00:09<00:18,  9.45s/it]
 67%|██████▋   | 2/3 [00:19<00:10, 10.07s/it]
 67%|██████▋   | 2/3 [00:19<00:10, 10.07s/it]
 67%|██████▋   | 2/3 [00:19<00:10, 10.04s/it]
 67%|██████▋   | 2/3 [00:19<00:10, 10.04s/it]
+
+
+
+[2026-05-28 22:34:10,362] INFO: Saving generated video to experiments/fast_chunk_ablation_20260528/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200.mp4
+[2026-05-28 22:34:12,758] INFO: Finished.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/manifest.json

@@ -0,0 +1,53 @@
+{
+  "description": "Same-prompt LingBot fast inference ablation over latent-frame chunk_size.",
+  "input_source": "repo_example_05",
+  "image": "examples/05/image.jpg",
+  "action_path": "examples/05",
+  "prompt_en": "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+  "prompt_zh": "第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。",
+  "fps": 16,
+  "frame_num": 141,
+  "effective_duration_seconds": 8.8125,
+  "seed": 6200,
+  "size": "480*832",
+  "nproc_per_node": 4,
+  "chunk_sizes": [1, 2, 3, 4, 6, 12],
+  "cases": [
+    {
+      "case_id": "example05_chunk01_seed6200",
+      "chunk_size": 1,
+      "chunk_frame_span": 4,
+      "chunk_seconds": 0.25
+    },
+    {
+      "case_id": "example05_chunk02_seed6200",
+      "chunk_size": 2,
+      "chunk_frame_span": 8,
+      "chunk_seconds": 0.5
+    },
+    {
+      "case_id": "example05_chunk03_seed6200",
+      "chunk_size": 3,
+      "chunk_frame_span": 12,
+      "chunk_seconds": 0.75
+    },
+    {
+      "case_id": "example05_chunk04_seed6200",
+      "chunk_size": 4,
+      "chunk_frame_span": 16,
+      "chunk_seconds": 1.0
+    },
+    {
+      "case_id": "example05_chunk06_seed6200",
+      "chunk_size": 6,
+      "chunk_frame_span": 24,
+      "chunk_seconds": 1.5
+    },
+    {
+      "case_id": "example05_chunk12_seed6200",
+      "chunk_size": 12,
+      "chunk_frame_span": 48,
+      "chunk_seconds": 3.0
+    }
+  ]
+}

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/metrics/example05_chunk01_seed6200.json

@@ -0,0 +1,91 @@
+{
+  "case": {
+    "case_id": "example05_chunk01_seed6200",
+    "chunk_size": 1,
+    "chunk_frame_span": 4,
+    "chunk_seconds": 0.25
+  },
+  "manifest_settings": {
+    "image": "examples/05/image.jpg",
+    "action_path": "examples/05",
+    "prompt_en": "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "prompt_zh": "第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。",
+    "fps": 16,
+    "frame_num": 141,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "size": "480*832"
+  },
+  "command": [
+    "torchrun",
+    "--nproc_per_node",
+    "4",
+    "--master_port",
+    "54584",
+    "generate_fast.py",
+    "--task",
+    "i2v-A14B",
+    "--size",
+    "480*832",
+    "--ckpt_dir",
+    "models/lingbot-world-base-cam",
+    "--image",
+    "examples/05/image.jpg",
+    "--action_path",
+    "examples/05",
+    "--dit_fsdp",
+    "--t5_fsdp",
+    "--ulysses_size",
+    "4",
+    "--frame_num",
+    "141",
+    "--base_seed",
+    "6200",
+    "--save_file",
+    "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4",
+    "--prompt",
+    "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "--chunk_size",
+    "1"
+  ],
+  "status": "ok",
+  "returncode": 0,
+  "start_time_unix": 1780031674.5294175,
+  "end_time_unix": 1780032497.1330109,
+  "wall_time_seconds": 822.6035933494568,
+  "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4",
+  "output_exists": true,
+  "output_size_bytes": 12860969,
+  "summary": {
+    "case_id": "example05_chunk01_seed6200",
+    "chunk_size": 1,
+    "chunk_frame_span": 4,
+    "chunk_seconds": 0.25,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 822.604,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 12860969,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk01_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk01_seed6200.json",
+    "nproc_per_node": 4
+  },
+  "gpu": {
+    "peak_total_memory_used_mib": 142300,
+    "peak_single_gpu_memory_used_mib": 42025,
+    "peak_by_gpu_mib": {
+      "0": 42025,
+      "1": 33347,
+      "2": 33543,
+      "3": 33385
+    },
+    "mean_gpu_utilization_percent": 9.234,
+    "mean_nonzero_gpu_count": 0.399
+  },
+  "gpu_sample_count": 706
+}

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/metrics/example05_chunk02_seed6200.json

@@ -0,0 +1,91 @@
+{
+  "case": {
+    "case_id": "example05_chunk02_seed6200",
+    "chunk_size": 2,
+    "chunk_frame_span": 8,
+    "chunk_seconds": 0.5
+  },
+  "manifest_settings": {
+    "image": "examples/05/image.jpg",
+    "action_path": "examples/05",
+    "prompt_en": "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "prompt_zh": "第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。",
+    "fps": 16,
+    "frame_num": 141,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "size": "480*832"
+  },
+  "command": [
+    "torchrun",
+    "--nproc_per_node",
+    "4",
+    "--master_port",
+    "17599",
+    "generate_fast.py",
+    "--task",
+    "i2v-A14B",
+    "--size",
+    "480*832",
+    "--ckpt_dir",
+    "models/lingbot-world-base-cam",
+    "--image",
+    "examples/05/image.jpg",
+    "--action_path",
+    "examples/05",
+    "--dit_fsdp",
+    "--t5_fsdp",
+    "--ulysses_size",
+    "4",
+    "--frame_num",
+    "141",
+    "--base_seed",
+    "6200",
+    "--save_file",
+    "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4",
+    "--prompt",
+    "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "--chunk_size",
+    "2"
+  ],
+  "status": "ok",
+  "returncode": 0,
+  "start_time_unix": 1780031674.5293832,
+  "end_time_unix": 1780032483.5115461,
+  "wall_time_seconds": 808.9821629524231,
+  "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4",
+  "output_exists": true,
+  "output_size_bytes": 12947094,
+  "summary": {
+    "case_id": "example05_chunk02_seed6200",
+    "chunk_size": 2,
+    "chunk_frame_span": 8,
+    "chunk_seconds": 0.5,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 808.982,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 12947094,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk02_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk02_seed6200.json",
+    "nproc_per_node": 4
+  },
+  "gpu": {
+    "peak_total_memory_used_mib": 141858,
+    "peak_single_gpu_memory_used_mib": 42021,
+    "peak_by_gpu_mib": {
+      "0": 42021,
+      "1": 33327,
+      "2": 33327,
+      "3": 33183
+    },
+    "mean_gpu_utilization_percent": 7.697,
+    "mean_nonzero_gpu_count": 0.356
+  },
+  "gpu_sample_count": 696
+}

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/metrics/example05_chunk03_seed6200.json

@@ -0,0 +1,91 @@
+{
+  "case": {
+    "case_id": "example05_chunk03_seed6200",
+    "chunk_size": 3,
+    "chunk_frame_span": 12,
+    "chunk_seconds": 0.75
+  },
+  "manifest_settings": {
+    "image": "examples/05/image.jpg",
+    "action_path": "examples/05",
+    "prompt_en": "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "prompt_zh": "第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。",
+    "fps": 16,
+    "frame_num": 141,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "size": "480*832"
+  },
+  "command": [
+    "torchrun",
+    "--nproc_per_node",
+    "4",
+    "--master_port",
+    "37172",
+    "generate_fast.py",
+    "--task",
+    "i2v-A14B",
+    "--size",
+    "480*832",
+    "--ckpt_dir",
+    "models/lingbot-world-base-cam",
+    "--image",
+    "examples/05/image.jpg",
+    "--action_path",
+    "examples/05",
+    "--dit_fsdp",
+    "--t5_fsdp",
+    "--ulysses_size",
+    "4",
+    "--frame_num",
+    "141",
+    "--base_seed",
+    "6200",
+    "--save_file",
+    "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4",
+    "--prompt",
+    "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "--chunk_size",
+    "3"
+  ],
+  "status": "ok",
+  "returncode": 0,
+  "start_time_unix": 1780032497.8438754,
+  "end_time_unix": 1780032662.2073214,
+  "wall_time_seconds": 164.36344599723816,
+  "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4",
+  "output_exists": true,
+  "output_size_bytes": 14589858,
+  "summary": {
+    "case_id": "example05_chunk03_seed6200",
+    "chunk_size": 3,
+    "chunk_frame_span": 12,
+    "chunk_seconds": 0.75,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 164.363,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 14589858,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk03_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk03_seed6200.json",
+    "nproc_per_node": 4
+  },
+  "gpu": {
+    "peak_total_memory_used_mib": 143526,
+    "peak_single_gpu_memory_used_mib": 41973,
+    "peak_by_gpu_mib": {
+      "0": 41973,
+      "1": 34019,
+      "2": 33839,
+      "3": 33695
+    },
+    "mean_gpu_utilization_percent": 37.346,
+    "mean_nonzero_gpu_count": 1.702
+  },
+  "gpu_sample_count": 141
+}

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/metrics/example05_chunk04_seed6200.json

@@ -0,0 +1,91 @@
+{
+  "case": {
+    "case_id": "example05_chunk04_seed6200",
+    "chunk_size": 4,
+    "chunk_frame_span": 16,
+    "chunk_seconds": 1.0
+  },
+  "manifest_settings": {
+    "image": "examples/05/image.jpg",
+    "action_path": "examples/05",
+    "prompt_en": "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "prompt_zh": "第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。",
+    "fps": 16,
+    "frame_num": 141,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "size": "480*832"
+  },
+  "command": [
+    "torchrun",
+    "--nproc_per_node",
+    "4",
+    "--master_port",
+    "37113",
+    "generate_fast.py",
+    "--task",
+    "i2v-A14B",
+    "--size",
+    "480*832",
+    "--ckpt_dir",
+    "models/lingbot-world-base-cam",
+    "--image",
+    "examples/05/image.jpg",
+    "--action_path",
+    "examples/05",
+    "--dit_fsdp",
+    "--t5_fsdp",
+    "--ulysses_size",
+    "4",
+    "--frame_num",
+    "141",
+    "--base_seed",
+    "6200",
+    "--save_file",
+    "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200.mp4",
+    "--prompt",
+    "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "--chunk_size",
+    "4"
+  ],
+  "status": "ok",
+  "returncode": 0,
+  "start_time_unix": 1780033557.2467349,
+  "end_time_unix": 1780034352.8034408,
+  "wall_time_seconds": 795.5567059516907,
+  "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200.mp4",
+  "output_exists": true,
+  "output_size_bytes": 15530802,
+  "summary": {
+    "case_id": "example05_chunk04_seed6200",
+    "chunk_size": 4,
+    "chunk_frame_span": 16,
+    "chunk_seconds": 1.0,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 795.557,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 15530802,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk04_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk04_seed6200.json",
+    "nproc_per_node": 4
+  },
+  "gpu": {
+    "peak_total_memory_used_mib": 144140,
+    "peak_single_gpu_memory_used_mib": 42039,
+    "peak_by_gpu_mib": {
+      "0": 42039,
+      "1": 34017,
+      "2": 34211,
+      "3": 33873
+    },
+    "mean_gpu_utilization_percent": 7.076,
+    "mean_nonzero_gpu_count": 0.323
+  },
+  "gpu_sample_count": 744
+}

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/metrics/example05_chunk06_seed6200.json

@@ -0,0 +1,91 @@
+{
+  "case": {
+    "case_id": "example05_chunk06_seed6200",
+    "chunk_size": 6,
+    "chunk_frame_span": 24,
+    "chunk_seconds": 1.5
+  },
+  "manifest_settings": {
+    "image": "examples/05/image.jpg",
+    "action_path": "examples/05",
+    "prompt_en": "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "prompt_zh": "第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。",
+    "fps": 16,
+    "frame_num": 141,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "size": "480*832"
+  },
+  "command": [
+    "torchrun",
+    "--nproc_per_node",
+    "4",
+    "--master_port",
+    "55131",
+    "generate_fast.py",
+    "--task",
+    "i2v-A14B",
+    "--size",
+    "480*832",
+    "--ckpt_dir",
+    "models/lingbot-world-base-cam",
+    "--image",
+    "examples/05/image.jpg",
+    "--action_path",
+    "examples/05",
+    "--dit_fsdp",
+    "--t5_fsdp",
+    "--ulysses_size",
+    "4",
+    "--frame_num",
+    "141",
+    "--base_seed",
+    "6200",
+    "--save_file",
+    "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200.mp4",
+    "--prompt",
+    "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "--chunk_size",
+    "6"
+  ],
+  "status": "ok",
+  "returncode": 0,
+  "start_time_unix": 1780032540.0052245,
+  "end_time_unix": 1780032699.6453283,
+  "wall_time_seconds": 159.64010381698608,
+  "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200.mp4",
+  "output_exists": true,
+  "output_size_bytes": 12875361,
+  "summary": {
+    "case_id": "example05_chunk06_seed6200",
+    "chunk_size": 6,
+    "chunk_frame_span": 24,
+    "chunk_seconds": 1.5,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 159.64,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 12875361,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk06_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk06_seed6200.json",
+    "nproc_per_node": 4
+  },
+  "gpu": {
+    "peak_total_memory_used_mib": 145216,
+    "peak_single_gpu_memory_used_mib": 42059,
+    "peak_by_gpu_mib": {
+      "0": 42059,
+      "1": 34369,
+      "2": 34369,
+      "3": 34419
+    },
+    "mean_gpu_utilization_percent": 36.496,
+    "mean_nonzero_gpu_count": 1.562
+  },
+  "gpu_sample_count": 137
+}

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/metrics/example05_chunk12_seed6200.json

@@ -0,0 +1,91 @@
+{
+  "case": {
+    "case_id": "example05_chunk12_seed6200",
+    "chunk_size": 12,
+    "chunk_frame_span": 48,
+    "chunk_seconds": 3.0
+  },
+  "manifest_settings": {
+    "image": "examples/05/image.jpg",
+    "action_path": "examples/05",
+    "prompt_en": "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "prompt_zh": "第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。",
+    "fps": 16,
+    "frame_num": 141,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "size": "480*832"
+  },
+  "command": [
+    "torchrun",
+    "--nproc_per_node",
+    "4",
+    "--master_port",
+    "21357",
+    "generate_fast.py",
+    "--task",
+    "i2v-A14B",
+    "--size",
+    "480*832",
+    "--ckpt_dir",
+    "models/lingbot-world-base-cam",
+    "--image",
+    "examples/05/image.jpg",
+    "--action_path",
+    "examples/05",
+    "--dit_fsdp",
+    "--t5_fsdp",
+    "--ulysses_size",
+    "4",
+    "--frame_num",
+    "141",
+    "--base_seed",
+    "6200",
+    "--save_file",
+    "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200.mp4",
+    "--prompt",
+    "A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.",
+    "--chunk_size",
+    "12"
+  ],
+  "status": "ok",
+  "returncode": 0,
+  "start_time_unix": 1780032676.2576113,
+  "end_time_unix": 1780032854.2995791,
+  "wall_time_seconds": 178.04196786880493,
+  "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200.mp4",
+  "output_exists": true,
+  "output_size_bytes": 13578543,
+  "summary": {
+    "case_id": "example05_chunk12_seed6200",
+    "chunk_size": 12,
+    "chunk_frame_span": 48,
+    "chunk_seconds": 3.0,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 178.042,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 13578543,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk12_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk12_seed6200.json",
+    "nproc_per_node": 4
+  },
+  "gpu": {
+    "peak_total_memory_used_mib": 151852,
+    "peak_single_gpu_memory_used_mib": 42627,
+    "peak_by_gpu_mib": {
+      "0": 42627,
+      "1": 36471,
+      "2": 36501,
+      "3": 36253
+    },
+    "mean_gpu_utilization_percent": 31.639,
+    "mean_nonzero_gpu_count": 1.405
+  },
+  "gpu_sample_count": 153
+}

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:31322f812f1be9b49a1f3e6f64b566ccaa9608cd563cb1594a1f78b56b20f88e
+size 12860969

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200_subtitled.ass

@@ -0,0 +1,14 @@
+[Script Info]
+ScriptType: v4.00+
+PlayResX: 832
+PlayResY: 464
+WrapStyle: 0
+ScaledBorderAndShadow: yes
+
+[V4+ Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: Default,Arial Unicode MS,15,&H00FFFFFF,&H000000FF,&H00000000,&H98000000,0,0,0,0,100,100,0,0,3,2,0,2,30,30,24,1
+
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 0,0:00:00.00,0:00:08.81,Default,,0,0,0,,第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮\N革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。\NA first-person cinematic flight through a lush fantasy jungle, blue hands\Ngripping vibrating leather reins in the foreground as an ancient gothic castle\Ngrows clearer ahead, with floating islands and distant waterfalls in the\Nbackground.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200_subtitled.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:10ba74bdb02a53808d96d62254ffe4d703ed0d3d56f381f34ef115dd895adc11
+size 4773447

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200_subtitled.srt

@@ -0,0 +1,8 @@
+1
+00:00:00,000 --> 00:00:08,812
+第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮
+革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。
+A first-person cinematic flight through a lush fantasy jungle, blue hands
+gripping vibrating leather reins in the foreground as an ancient gothic castle
+grows clearer ahead, with floating islands and distant waterfalls in the
+background.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:efa7679885e1c2e99409c2ab82dd6eae9a34811cccc25fb14c7d97fda4577c8d
+size 12947094

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200_subtitled.ass

@@ -0,0 +1,14 @@
+[Script Info]
+ScriptType: v4.00+
+PlayResX: 832
+PlayResY: 464
+WrapStyle: 0
+ScaledBorderAndShadow: yes
+
+[V4+ Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: Default,Arial Unicode MS,15,&H00FFFFFF,&H000000FF,&H00000000,&H98000000,0,0,0,0,100,100,0,0,3,2,0,2,30,30,24,1
+
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 0,0:00:00.00,0:00:08.81,Default,,0,0,0,,第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮\N革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。\NA first-person cinematic flight through a lush fantasy jungle, blue hands\Ngripping vibrating leather reins in the foreground as an ancient gothic castle\Ngrows clearer ahead, with floating islands and distant waterfalls in the\Nbackground.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200_subtitled.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5bd95e5b1a94bdf39b79707c25c6759a4d0d61a33e5274fcd739b4967062c998
+size 4792056

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200_subtitled.srt

@@ -0,0 +1,8 @@
+1
+00:00:00,000 --> 00:00:08,812
+第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮
+革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。
+A first-person cinematic flight through a lush fantasy jungle, blue hands
+gripping vibrating leather reins in the foreground as an ancient gothic castle
+grows clearer ahead, with floating islands and distant waterfalls in the
+background.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:146627b3ad54697fc7824633d2889e9fc8cc624a180a5292b48db7e1b55e3ad8
+size 14589858

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200_subtitled.ass

@@ -0,0 +1,14 @@
+[Script Info]
+ScriptType: v4.00+
+PlayResX: 832
+PlayResY: 464
+WrapStyle: 0
+ScaledBorderAndShadow: yes
+
+[V4+ Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: Default,Arial Unicode MS,15,&H00FFFFFF,&H000000FF,&H00000000,&H98000000,0,0,0,0,100,100,0,0,3,2,0,2,30,30,24,1
+
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 0,0:00:00.00,0:00:08.81,Default,,0,0,0,,第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮\N革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。\NA first-person cinematic flight through a lush fantasy jungle, blue hands\Ngripping vibrating leather reins in the foreground as an ancient gothic castle\Ngrows clearer ahead, with floating islands and distant waterfalls in the\Nbackground.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200_subtitled.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:74f028f16076fe3c317c1c48508e8944a3a85a511116c7feda58d3bfd6f6e566
+size 5791493

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200_subtitled.srt

@@ -0,0 +1,8 @@
+1
+00:00:00,000 --> 00:00:08,812
+第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮
+革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。
+A first-person cinematic flight through a lush fantasy jungle, blue hands
+gripping vibrating leather reins in the foreground as an ancient gothic castle
+grows clearer ahead, with floating islands and distant waterfalls in the
+background.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1fd65e657bdc2d3fc700f6da2ec6585f9059e4535bdc7564003798ccbdce3bb8
+size 15530802

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200_subtitled.ass

@@ -0,0 +1,14 @@
+[Script Info]
+ScriptType: v4.00+
+PlayResX: 832
+PlayResY: 464
+WrapStyle: 0
+ScaledBorderAndShadow: yes
+
+[V4+ Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: Default,Arial Unicode MS,15,&H00FFFFFF,&H000000FF,&H00000000,&H98000000,0,0,0,0,100,100,0,0,3,2,0,2,30,30,24,1
+
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 0,0:00:00.00,0:00:08.81,Default,,0,0,0,,第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮\N革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。\NA first-person cinematic flight through a lush fantasy jungle, blue hands\Ngripping vibrating leather reins in the foreground as an ancient gothic castle\Ngrows clearer ahead, with floating islands and distant waterfalls in the\Nbackground.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200_subtitled.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a32f91ae8d992124e15491a3a98fdc391ce12523e3bf20a79de56da57efea292
+size 6187437

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200_subtitled.srt

@@ -0,0 +1,8 @@
+1
+00:00:00,000 --> 00:00:08,812
+第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮
+革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。
+A first-person cinematic flight through a lush fantasy jungle, blue hands
+gripping vibrating leather reins in the foreground as an ancient gothic castle
+grows clearer ahead, with floating islands and distant waterfalls in the
+background.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ca31a0028b50ed7ad7350e5048d4dcc07a9559143c408cbdc8defcba16766705
+size 12875361

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200_subtitled.ass

@@ -0,0 +1,14 @@
+[Script Info]
+ScriptType: v4.00+
+PlayResX: 832
+PlayResY: 464
+WrapStyle: 0
+ScaledBorderAndShadow: yes
+
+[V4+ Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: Default,Arial Unicode MS,15,&H00FFFFFF,&H000000FF,&H00000000,&H98000000,0,0,0,0,100,100,0,0,3,2,0,2,30,30,24,1
+
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 0,0:00:00.00,0:00:08.81,Default,,0,0,0,,第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮\N革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。\NA first-person cinematic flight through a lush fantasy jungle, blue hands\Ngripping vibrating leather reins in the foreground as an ancient gothic castle\Ngrows clearer ahead, with floating islands and distant waterfalls in the\Nbackground.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200_subtitled.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:58221a405a7519af948f6511209bbf572ee2a6dab0dbfd425f88576bd587b082
+size 4769040

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200_subtitled.srt

@@ -0,0 +1,8 @@
+1
+00:00:00,000 --> 00:00:08,812
+第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮
+革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。
+A first-person cinematic flight through a lush fantasy jungle, blue hands
+gripping vibrating leather reins in the foreground as an ancient gothic castle
+grows clearer ahead, with floating islands and distant waterfalls in the
+background.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ccdfd8c51a72b2930862dac34cb54dd3ef4a15255b954f8d81d5ebbef136fb4f
+size 13578543

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200_subtitled.ass

@@ -0,0 +1,14 @@
+[Script Info]
+ScriptType: v4.00+
+PlayResX: 832
+PlayResY: 464
+WrapStyle: 0
+ScaledBorderAndShadow: yes
+
+[V4+ Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: Default,Arial Unicode MS,15,&H00FFFFFF,&H000000FF,&H00000000,&H98000000,0,0,0,0,100,100,0,0,3,2,0,2,30,30,24,1
+
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 0,0:00:00.00,0:00:08.81,Default,,0,0,0,,第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮\N革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。\NA first-person cinematic flight through a lush fantasy jungle, blue hands\Ngripping vibrating leather reins in the foreground as an ancient gothic castle\Ngrows clearer ahead, with floating islands and distant waterfalls in the\Nbackground.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200_subtitled.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3327067da12501b8628452a051f6b443df55b89d2129303545132b1f7f138a4f
+size 5150744

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200_subtitled.srt

@@ -0,0 +1,8 @@
+1
+00:00:00,000 --> 00:00:08,812
+第一人称电影镜头飞越茂密的幻想丛林，前景中蓝色双手握着震动的皮
+革缰绳，前方古老哥特城堡逐渐清晰，背景有漂浮岛屿和远处瀑布。
+A first-person cinematic flight through a lush fantasy jungle, blue hands
+gripping vibrating leather reins in the foreground as an ancient gothic castle
+grows clearer ahead, with floating islands and distant waterfalls in the
+background.

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/report.md

@@ -0,0 +1,17 @@
+# LingBot Fast Chunk Size Ablation
+
+- Prompt: A first-person cinematic flight through a lush fantasy jungle, blue hands gripping vibrating leather reins in the foreground as an ancient gothic castle grows clearer ahead, with floating islands and distant waterfalls in the background.
+- Image: `examples/05/image.jpg`
+- Camera/action path: `examples/05`
+- Seed: `6200`
+- Frame num / FPS: `141` / `16`
+- Effective duration: `8.8125` seconds
+
+| chunk_size | chunk seconds | status | wall time s | peak single GPU MiB | mean GPU util % | output |
+| ---: | ---: | --- | ---: | ---: | ---: | --- |
+| 1 | 0.25 | ok | 822.6 | 42025 | 9.234 | `experiments/fast_chunk_ablation_20260528/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4` |
+| 2 | 0.5 | ok | 809.0 | 42021 | 7.697 | `experiments/fast_chunk_ablation_20260528/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4` |
+| 3 | 0.75 | ok | 164.4 | 41973 | 37.346 | `experiments/fast_chunk_ablation_20260528/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4` |
+| 4 | 1.0 | ok | 795.6 | 42039 | 7.076 | `experiments/fast_chunk_ablation_20260528/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200.mp4` |
+| 6 | 1.5 | ok | 159.6 | 42059 | 36.496 | `experiments/fast_chunk_ablation_20260528/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200.mp4` |
+| 12 | 3.0 | ok | 178.0 | 42627 | 31.639 | `experiments/fast_chunk_ablation_20260528/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200.mp4` |

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/run_fast_chunk_ablation_4gpu.sbatch

@@ -0,0 +1,35 @@
+#!/bin/bash
+#SBATCH -A nvr_elm_llm
+#SBATCH -p batch_block1,batch_block2,batch_block3,batch_block4
+#SBATCH -t 04:00:00
+#SBATCH -N 1
+#SBATCH --gpus-per-node=4
+#SBATCH -J nvr_elm_llm:fast-chunk-ablation
+#SBATCH --array=0-5%2
+#SBATCH -o experiments/fast_chunk_ablation_20260528/slurm/%x_%A_%a.out
+#SBATCH -e experiments/fast_chunk_ablation_20260528/slurm/%x_%A_%a.err
+
+set -euo pipefail
+
+REPO_ROOT="/lustre/fs11/portfolios/nvr/projects/nvr_elm_llm/users/shyang/lingbot"
+CONDA_SH="/lustre/fsw/portfolios/nvr/users/shyang/miniconda3/etc/profile.d/conda.sh"
+LOCAL_ROOT="${LOCAL_ROOT:-experiments/fast_chunk_ablation_20260528}"
+NPROC="${NPROC_PER_NODE:-4}"
+MASTER_PORT=$((20000 + (SLURM_ARRAY_JOB_ID % 20000) + SLURM_ARRAY_TASK_ID * 100))
+
+cd "${REPO_ROOT}"
+mkdir -p "${LOCAL_ROOT}/slurm"
+source "${CONDA_SH}"
+conda activate lingbot_world_repro
+
+python "${LOCAL_ROOT}/run_fast_chunk_case.py" \
+  --manifest "${LOCAL_ROOT}/manifest.json" \
+  --case-index "${SLURM_ARRAY_TASK_ID}" \
+  --output-root "${LOCAL_ROOT}/outputs" \
+  --metrics-dir "${LOCAL_ROOT}/metrics" \
+  --log-dir "${LOCAL_ROOT}/logs" \
+  --ckpt-dir models/lingbot-world-base-cam \
+  --nproc-per-node "${NPROC}" \
+  --master-port "${MASTER_PORT}" \
+  --monitor-interval "${MONITOR_INTERVAL:-1.0}" \
+  --resume

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/run_fast_chunk_case.py

@@ -0,0 +1,319 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import argparse
+import csv
+import json
+import os
+import shlex
+import subprocess
+import sys
+import threading
+import time
+from pathlib import Path
+
+
+OOM_MARKERS = [
+    "CUDA out of memory",
+    "torch.OutOfMemoryError",
+    "out of memory",
+    "CUBLAS_STATUS_ALLOC_FAILED",
+]
+
+
+def load_manifest(path: Path) -> dict:
+    return json.loads(path.read_text(encoding="utf-8"))
+
+
+def query_gpu():
+    cmd = [
+        "nvidia-smi",
+        "--query-gpu=index,utilization.gpu,memory.used",
+        "--format=csv,noheader,nounits",
+    ]
+    try:
+        result = subprocess.run(
+            cmd,
+            check=True,
+            text=True,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+        )
+    except (FileNotFoundError, subprocess.CalledProcessError):
+        return []
+
+    rows = []
+    for line in result.stdout.splitlines():
+        parts = [part.strip() for part in line.split(",")]
+        if len(parts) != 3:
+            continue
+        try:
+            rows.append(
+                {
+                    "index": int(parts[0]),
+                    "utilization_gpu_percent": int(parts[1]),
+                    "memory_used_mib": int(parts[2]),
+                }
+            )
+        except ValueError:
+            continue
+    return rows
+
+
+def monitor_gpu(stop_event: threading.Event, samples: list[dict], interval: float) -> None:
+    while not stop_event.is_set():
+        readings = query_gpu()
+        if readings:
+            samples.append({"time": time.time(), "gpus": readings})
+        stop_event.wait(interval)
+
+
+def summarize_gpu(samples: list[dict]) -> dict:
+    if not samples:
+        return {
+            "peak_total_memory_used_mib": None,
+            "peak_single_gpu_memory_used_mib": None,
+            "peak_by_gpu_mib": {},
+            "mean_gpu_utilization_percent": None,
+            "mean_nonzero_gpu_count": None,
+        }
+
+    peak_total = 0
+    peak_single = 0
+    peak_by_gpu: dict[str, int] = {}
+    util_values = []
+    nonzero_counts = []
+    for sample in samples:
+        total = 0
+        nonzero = 0
+        for gpu in sample["gpus"]:
+            idx = str(gpu["index"])
+            used = gpu["memory_used_mib"]
+            util = gpu["utilization_gpu_percent"]
+            total += used
+            peak_single = max(peak_single, used)
+            peak_by_gpu[idx] = max(peak_by_gpu.get(idx, 0), used)
+            util_values.append(util)
+            if util > 0:
+                nonzero += 1
+        nonzero_counts.append(nonzero)
+        peak_total = max(peak_total, total)
+    return {
+        "peak_total_memory_used_mib": peak_total,
+        "peak_single_gpu_memory_used_mib": peak_single,
+        "peak_by_gpu_mib": peak_by_gpu,
+        "mean_gpu_utilization_percent": round(sum(util_values) / len(util_values), 3)
+        if util_values
+        else None,
+        "mean_nonzero_gpu_count": round(sum(nonzero_counts) / len(nonzero_counts), 3)
+        if nonzero_counts
+        else None,
+    }
+
+
+def detect_oom(log_file: Path) -> bool:
+    if not log_file.exists():
+        return False
+    text = log_file.read_text(encoding="utf-8", errors="ignore")
+    return any(marker in text for marker in OOM_MARKERS)
+
+
+def build_command(args: argparse.Namespace, manifest: dict, case: dict, output_file: Path) -> list[str]:
+    return [
+        "torchrun",
+        "--nproc_per_node",
+        str(args.nproc_per_node),
+        "--master_port",
+        str(args.master_port),
+        "generate_fast.py",
+        "--task",
+        "i2v-A14B",
+        "--size",
+        manifest["size"],
+        "--ckpt_dir",
+        args.ckpt_dir,
+        "--image",
+        manifest["image"],
+        "--action_path",
+        manifest["action_path"],
+        "--dit_fsdp",
+        "--t5_fsdp",
+        "--ulysses_size",
+        str(args.nproc_per_node),
+        "--frame_num",
+        str(manifest["frame_num"]),
+        "--base_seed",
+        str(manifest["seed"]),
+        "--save_file",
+        str(output_file),
+        "--prompt",
+        manifest["prompt_en"],
+        "--chunk_size",
+        str(case["chunk_size"]),
+    ]
+
+
+def write_summary_csv(path: Path, rows: list[dict]) -> None:
+    if not rows:
+        return
+    path.parent.mkdir(parents=True, exist_ok=True)
+    fieldnames = list(rows[0].keys())
+    with path.open("w", encoding="utf-8", newline="") as handle:
+        writer = csv.DictWriter(handle, fieldnames=fieldnames)
+        writer.writeheader()
+        writer.writerows(rows)
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--manifest", type=Path, default=Path("experiments/fast_chunk_ablation_20260528/manifest.json"))
+    parser.add_argument("--case-index", type=int, default=None)
+    parser.add_argument("--case-id", default=None)
+    parser.add_argument("--ckpt-dir", default="models/lingbot-world-base-cam")
+    parser.add_argument("--output-root", type=Path, default=Path("experiments/fast_chunk_ablation_20260528/outputs"))
+    parser.add_argument("--metrics-dir", type=Path, default=Path("experiments/fast_chunk_ablation_20260528/metrics"))
+    parser.add_argument("--log-dir", type=Path, default=Path("experiments/fast_chunk_ablation_20260528/logs"))
+    parser.add_argument("--nproc-per-node", type=int, default=4)
+    parser.add_argument("--master-port", type=int, default=None)
+    parser.add_argument("--monitor-interval", type=float, default=1.0)
+    parser.add_argument("--resume", action="store_true", default=False)
+    args = parser.parse_args()
+
+    if args.master_port is None:
+        job_id = int(os.environ.get("SLURM_JOB_ID", os.getpid()))
+        task_id = int(os.environ.get("SLURM_ARRAY_TASK_ID", "0"))
+        args.master_port = 17000 + ((job_id * 97 + task_id * 7919 + os.getpid()) % 45000)
+
+    manifest = load_manifest(args.manifest)
+    cases = manifest["cases"]
+    if args.case_index is not None:
+        case = cases[args.case_index]
+    else:
+        matches = [item for item in cases if item["case_id"] == args.case_id]
+        if len(matches) != 1:
+            raise SystemExit(f"Expected one matching case, found {len(matches)}")
+        case = matches[0]
+
+    output_dir = args.output_root / f"chunk_size_{case['chunk_size']:02d}"
+    output_dir.mkdir(parents=True, exist_ok=True)
+    args.metrics_dir.mkdir(parents=True, exist_ok=True)
+    args.log_dir.mkdir(parents=True, exist_ok=True)
+    output_file = output_dir / f"fast_chunk_ablation_{case['case_id']}.mp4"
+    metrics_file = args.metrics_dir / f"{case['case_id']}.json"
+    log_file = args.log_dir / f"{case['case_id']}.log"
+
+    if args.resume and metrics_file.exists() and output_file.exists():
+        old = json.loads(metrics_file.read_text(encoding="utf-8"))
+        if old.get("status") == "ok" and old.get("output_exists"):
+            print(f"Case already completed: {output_file}")
+            return 0
+
+    cmd = build_command(args, manifest, case, output_file)
+    env = os.environ.copy()
+    env.setdefault("PYTHONUNBUFFERED", "1")
+    env.setdefault("TOKENIZERS_PARALLELISM", "false")
+    env.setdefault("NCCL_DEBUG", "WARN")
+
+    samples: list[dict] = []
+    stop_event = threading.Event()
+    monitor = threading.Thread(
+        target=monitor_gpu,
+        args=(stop_event, samples, args.monitor_interval),
+        daemon=True,
+    )
+
+    start = time.time()
+    monitor.start()
+    with log_file.open("w", encoding="utf-8") as log:
+        log.write("Command: " + " ".join(shlex.quote(part) for part in cmd) + "\n")
+        log.flush()
+        proc = subprocess.run(
+            cmd,
+            cwd=Path.cwd(),
+            env=env,
+            stdout=log,
+            stderr=subprocess.STDOUT,
+            text=True,
+        )
+    stop_event.set()
+    monitor.join(timeout=5)
+    end = time.time()
+
+    output_exists = output_file.exists()
+    status = "ok" if proc.returncode == 0 and output_exists else "failed"
+    if status == "failed" and detect_oom(log_file):
+        status = "oom"
+    summary = {
+        "case_id": case["case_id"],
+        "chunk_size": case["chunk_size"],
+        "chunk_frame_span": case["chunk_frame_span"],
+        "chunk_seconds": case["chunk_seconds"],
+        "frame_num": manifest["frame_num"],
+        "fps": manifest["fps"],
+        "effective_duration_seconds": manifest["effective_duration_seconds"],
+        "seed": manifest["seed"],
+        "status": status,
+        "returncode": proc.returncode,
+        "wall_time_seconds": round(end - start, 3),
+        "output_file": str(output_file),
+        "output_exists": output_exists,
+        "output_size_bytes": output_file.stat().st_size if output_exists else 0,
+        "log_file": str(log_file),
+        "metrics_file": str(metrics_file),
+        "nproc_per_node": args.nproc_per_node,
+    }
+    metrics = {
+        "case": case,
+        "manifest_settings": {
+            key: manifest[key]
+            for key in [
+                "image",
+                "action_path",
+                "prompt_en",
+                "prompt_zh",
+                "fps",
+                "frame_num",
+                "effective_duration_seconds",
+                "seed",
+                "size",
+            ]
+        },
+        "command": cmd,
+        "status": status,
+        "returncode": proc.returncode,
+        "start_time_unix": start,
+        "end_time_unix": end,
+        "wall_time_seconds": end - start,
+        "output_file": str(output_file),
+        "output_exists": output_exists,
+        "output_size_bytes": output_file.stat().st_size if output_exists else 0,
+        "summary": summary,
+        "gpu": summarize_gpu(samples),
+        "gpu_sample_count": len(samples),
+    }
+    metrics_file.write_text(json.dumps(metrics, indent=2, ensure_ascii=False) + "\n", encoding="utf-8")
+
+    rows = []
+    for path in sorted(args.metrics_dir.glob("*.json")):
+        try:
+            data = json.loads(path.read_text(encoding="utf-8"))
+        except Exception:
+            continue
+        row = dict(data.get("summary", {}))
+        gpu = data.get("gpu", {})
+        row["peak_single_gpu_memory_used_mib"] = gpu.get("peak_single_gpu_memory_used_mib")
+        row["peak_total_memory_used_mib"] = gpu.get("peak_total_memory_used_mib")
+        row["mean_gpu_utilization_percent"] = gpu.get("mean_gpu_utilization_percent")
+        row["mean_nonzero_gpu_count"] = gpu.get("mean_nonzero_gpu_count")
+        rows.append(row)
+    write_summary_csv(args.manifest.parent / "run_manifest.csv", rows)
+
+    if status != "ok":
+        print(f"Case {status}; see {log_file}", file=sys.stderr)
+        return proc.returncode if proc.returncode != 0 else 1
+    print(f"Case completed: {output_file}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/run_manifest.csv

@@ -0,0 +1,7 @@
+case_id,chunk_size,chunk_frame_span,chunk_seconds,frame_num,fps,effective_duration_seconds,seed,status,returncode,wall_time_seconds,peak_single_gpu_memory_used_mib,peak_total_memory_used_mib,mean_gpu_utilization_percent,mean_nonzero_gpu_count,output_file,output_size_bytes,nproc_per_node
+example05_chunk01_seed6200,1,4,0.25,141,16,8.8125,6200,ok,0,822.604,42025,142300,9.234,0.399,experiments/fast_chunk_ablation_20260528/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4,12860969,4
+example05_chunk02_seed6200,2,8,0.5,141,16,8.8125,6200,ok,0,808.982,42021,141858,7.697,0.356,experiments/fast_chunk_ablation_20260528/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4,12947094,4
+example05_chunk03_seed6200,3,12,0.75,141,16,8.8125,6200,ok,0,164.363,41973,143526,37.346,1.702,experiments/fast_chunk_ablation_20260528/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4,14589858,4
+example05_chunk04_seed6200,4,16,1.0,141,16,8.8125,6200,ok,0,795.557,42039,144140,7.076,0.323,experiments/fast_chunk_ablation_20260528/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200.mp4,15530802,4
+example05_chunk06_seed6200,6,24,1.5,141,16,8.8125,6200,ok,0,159.64,42059,145216,36.496,1.562,experiments/fast_chunk_ablation_20260528/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200.mp4,12875361,4
+example05_chunk12_seed6200,12,48,3.0,141,16,8.8125,6200,ok,0,178.042,42627,151852,31.639,1.405,experiments/fast_chunk_ablation_20260528/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200.mp4,13578543,4

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/run_manifest.json

@@ -0,0 +1,140 @@
+[
+  {
+    "case_id": "example05_chunk01_seed6200",
+    "chunk_size": 1,
+    "chunk_frame_span": 4,
+    "chunk_seconds": 0.25,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 822.604,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 12860969,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk01_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk01_seed6200.json",
+    "nproc_per_node": 4,
+    "peak_single_gpu_memory_used_mib": 42025,
+    "peak_total_memory_used_mib": 142300,
+    "mean_gpu_utilization_percent": 9.234,
+    "mean_nonzero_gpu_count": 0.399
+  },
+  {
+    "case_id": "example05_chunk02_seed6200",
+    "chunk_size": 2,
+    "chunk_frame_span": 8,
+    "chunk_seconds": 0.5,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 808.982,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 12947094,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk02_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk02_seed6200.json",
+    "nproc_per_node": 4,
+    "peak_single_gpu_memory_used_mib": 42021,
+    "peak_total_memory_used_mib": 141858,
+    "mean_gpu_utilization_percent": 7.697,
+    "mean_nonzero_gpu_count": 0.356
+  },
+  {
+    "case_id": "example05_chunk03_seed6200",
+    "chunk_size": 3,
+    "chunk_frame_span": 12,
+    "chunk_seconds": 0.75,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 164.363,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 14589858,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk03_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk03_seed6200.json",
+    "nproc_per_node": 4,
+    "peak_single_gpu_memory_used_mib": 41973,
+    "peak_total_memory_used_mib": 143526,
+    "mean_gpu_utilization_percent": 37.346,
+    "mean_nonzero_gpu_count": 1.702
+  },
+  {
+    "case_id": "example05_chunk04_seed6200",
+    "chunk_size": 4,
+    "chunk_frame_span": 16,
+    "chunk_seconds": 1.0,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 795.557,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_04/fast_chunk_ablation_example05_chunk04_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 15530802,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk04_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk04_seed6200.json",
+    "nproc_per_node": 4,
+    "peak_single_gpu_memory_used_mib": 42039,
+    "peak_total_memory_used_mib": 144140,
+    "mean_gpu_utilization_percent": 7.076,
+    "mean_nonzero_gpu_count": 0.323
+  },
+  {
+    "case_id": "example05_chunk06_seed6200",
+    "chunk_size": 6,
+    "chunk_frame_span": 24,
+    "chunk_seconds": 1.5,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 159.64,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_06/fast_chunk_ablation_example05_chunk06_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 12875361,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk06_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk06_seed6200.json",
+    "nproc_per_node": 4,
+    "peak_single_gpu_memory_used_mib": 42059,
+    "peak_total_memory_used_mib": 145216,
+    "mean_gpu_utilization_percent": 36.496,
+    "mean_nonzero_gpu_count": 1.562
+  },
+  {
+    "case_id": "example05_chunk12_seed6200",
+    "chunk_size": 12,
+    "chunk_frame_span": 48,
+    "chunk_seconds": 3.0,
+    "frame_num": 141,
+    "fps": 16,
+    "effective_duration_seconds": 8.8125,
+    "seed": 6200,
+    "status": "ok",
+    "returncode": 0,
+    "wall_time_seconds": 178.042,
+    "output_file": "experiments/fast_chunk_ablation_20260528/outputs/chunk_size_12/fast_chunk_ablation_example05_chunk12_seed6200.mp4",
+    "output_exists": true,
+    "output_size_bytes": 13578543,
+    "log_file": "experiments/fast_chunk_ablation_20260528/logs/example05_chunk12_seed6200.log",
+    "metrics_file": "experiments/fast_chunk_ablation_20260528/metrics/example05_chunk12_seed6200.json",
+    "nproc_per_node": 4,
+    "peak_single_gpu_memory_used_mib": 42627,
+    "peak_total_memory_used_mib": 151852,
+    "mean_gpu_utilization_percent": 31.639,
+    "mean_nonzero_gpu_count": 1.405
+  }
+]

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/slurm/nvr_elm_llm:fast-chunk-ablation_9936290_0.out

@@ -0,0 +1 @@
+Case completed: experiments/fast_chunk_ablation_20260528/outputs/chunk_size_01/fast_chunk_ablation_example05_chunk01_seed6200.mp4

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/slurm/nvr_elm_llm:fast-chunk-ablation_9936290_1.out

@@ -0,0 +1 @@
+Case completed: experiments/fast_chunk_ablation_20260528/outputs/chunk_size_02/fast_chunk_ablation_example05_chunk02_seed6200.mp4

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/slurm/nvr_elm_llm:fast-chunk-ablation_9936290_2.out

@@ -0,0 +1 @@
+Case completed: experiments/fast_chunk_ablation_20260528/outputs/chunk_size_03/fast_chunk_ablation_example05_chunk03_seed6200.mp4

fast-inference/chunk-size-ablation/2026-05-28_same_prompt/20260528_230433/slurm/nvr_elm_llm:fast-chunk-ablation_9936290_3.err

@@ -0,0 +1 @@
+Case failed; see experiments/fast_chunk_ablation_20260528/logs/example05_chunk04_seed6200.log