# synth_captioning

Captioning pipeline for the synthetic PinPan datasets (`enrue1893/PinPan_Train_Syn`), extracted
from `JointGen-backup`. Perspective-crop rendering happens upstream (external simulator); this
bundle only covers the **captioning stage**: pulling pre-rendered panorama + 5 perspective clips
per sample and generating structured JSON captions with a locally-served Qwen VLM
(`Qwen/Qwen3.6-27B`).

## Files

```
data/dataset_streaming_template/
    stream_process_pinpan_train_syn_captions_only.py   # entry point — run this
    stream_process.py                                  # generic streaming template (reference)
    README.md                                           # streaming pattern docs
data/_5traj_4view_analysis/
    pano_conditioning.py                                # provides equi2pers() (ERP -> pinhole)
qwen36_test/
    caption_qwen36_8k_5traj.py                          # caption_9view_qwen() engine
    caption_qwen36_pano_perspective_pair.py             # low-level ERP/pinhole + Qwen helpers
    vllm_serve_wrapper.py                               # `vllm serve` wrapper (GEMM kernel workaround)
    README.md                                           # vLLM server launch instructions
requirements/
    qwen36_env.txt                                      # pinned Python deps
```

Import chain: `stream_process_pinpan_train_syn_captions_only.py` -> `caption_qwen36_8k_5traj.py`
(`q5`) -> `caption_qwen36_pano_perspective_pair.py` -> `pano_conditioning.py` (`equi2pers`).

## Setup

1. `python -m venv venv && source venv/bin/activate && pip install -r requirements/qwen36_env.txt`
2. Serve the captioning model: see `qwen36_test/README.md`
   (`python qwen36_test/vllm_serve_wrapper.py serve Qwen/Qwen3.6-27B --host 0.0.0.0 --port 8000 ...`).
3. **Fix the hardcoded conditioning path.** `caption_qwen36_pano_perspective_pair.py` defines:
   ```python
   DEFAULT_PANO_CONDITIONING_PATH = (
       "/home/work/.local/khs/Projects/PanoWorld/cosmos_predict2/_src/predict2/utils/pano_conditioning.py"
   )
   ```
   That absolute path won't exist on a new machine. Point it at the copy included in this bundle
   (`data/_5traj_4view_analysis/pano_conditioning.py`), e.g. edit the constant or symlink it into
   place before running.
4. Put an HF **write** token at `data/dataset_streaming_template/.hftoken` (gitignored, not
   included here) — used to upload results to `OUTPUT_REPO`. Override the input/output repos,
   `QWEN36_TEST_DIR`, `VLLM_BASE_URLS`, `VLLM_MODEL`, etc. via env vars (see the top of
   `stream_process_pinpan_train_syn_captions_only.py`).
5. Run:
   ```bash
   cd data/dataset_streaming_template
   python stream_process_pinpan_train_syn_captions_only.py
   ```

Source: `JointGen-backup` (khs2001d), `data/dataset_streaming_template/` and `qwen36_test/`.