| {"segment": "08_Spring_fl_vn_seg005", "family": "urmp", "layout": "concert", "duration_s": 4.52, "fps": 25, "num_frames": 113, "width": 768, "height": 512, "captions": {"semantic": {"scene": "Two musicians perform a duet on a concert-hall stage, a flute player standing on the left and a violin player on the right, both fully in frame in a static, locked-off wide two-shot. The flautist raises the instrument and blows a sustained phrase, fingers moving over the keys, while the violinist draws the bow smoothly across the strings, the left hand shifting position; both read from sheet music and glance at one another to stay in time. Even warm stage lighting, wooden backdrop, realistic documentary video. Two distinct acoustic instruments playing together, a live unaccompanied duet recorded close and dry — the clear breathy tone of a flute weaving against the bright singing tone of a bowed violin, the two lines answering one another in the same key and tempo, the flute carrying the higher line. No singing, no speech, no accompaniment, no backing track.", "scene_audio": "Two musicians perform a duet on a concert-hall stage, a flute player standing on the left and a violin player on the right, both fully in frame in a static, locked-off wide two-shot. The flautist raises the instrument and blows a sustained phrase, fingers moving over the keys, while the violinist draws the bow smoothly across the strings, the left hand shifting position; both read from sheet music and glance at one another to stay in time. Even warm stage lighting, wooden backdrop, realistic documentary video. Two distinct acoustic instruments playing together, a live unaccompanied duet recorded close and dry — the clear breathy tone of a flute weaving against the bright singing tone of a bowed violin, the two lines answering one another in the same key and tempo, the flute carrying the higher line. No singing, no speech, no accompaniment, no backing track.", "stem0": "A flute, playing.", "stem1": "A violin, playing."}}, "stem_boxes": null, "source": {"dataset": "URMP", "piece": "08_Spring_fl_vn", "video": "Vid_08_Spring_fl_vn.mp4", "ensemble_parts": 2, "piece_start_s": 26.2, "stems": [{"stem": 0, "dataset": "URMP", "side": "left", "instrument": "flute", "part": 1, "track": "AuSep_1_fl_08_Spring.wav"}, {"stem": 1, "dataset": "URMP", "side": "right", "instrument": "violin", "part": 2, "track": "AuSep_2_vn_08_Spring.wav"}]}, "mix": {"type": "sum of the two stems (mix = stem0 + stem1)", "stems_are_urmp_separated_tracks": true}} | |
| {"segment": "celebvhq_overlap_c1149_c1415_seg000_slot0f-left", "family": "celebvhq", "layout": "split-screen", "duration_s": 4.52, "fps": 25, "num_frames": 113, "width": 768, "height": 512, "captions": {"positional": {"scene": "A person on the left, speaking, and a person on the right, speaking.", "scene_audio": "A person on the left, speaking, and a person on the right, speaking.", "stem0": "The person on the left, speaking.", "stem1": "The person on the right, speaking."}}, "stem_boxes": null, "source": {"dataset": "CelebV-HQ", "speech": "overlapping speech", "stems": [{"stem": 0, "dataset": "CelebV-HQ", "side": "left", "celebvhq_clip_id": "Dl8me9oZC2E_3", "youtube_id": "Dl8me9oZC2E", "chunk_index": 2, "source_start_s": 0.0, "source_end_s": 4.36, "in_segment_start_s": 0.16, "in_segment_end_s": 4.52, "transcript": "And then one day, another woman came into rehab."}, {"stem": 1, "dataset": "CelebV-HQ", "side": "right", "celebvhq_clip_id": "yxp7jICX80U_3", "youtube_id": "yxp7jICX80U", "chunk_index": 0, "source_start_s": 0.0, "source_end_s": 2.56, "in_segment_start_s": 0.16, "in_segment_end_s": 2.72, "transcript": "You could start by using less electricity."}]}, "mix": {"type": "sum of the two stems (mix = stem0 + stem1)", "peak_gain": 1.0}} | |
| {"segment": "celebvhq_turntaking_c115_c150_seg001_slot0f-left-first0", "family": "celebvhq", "layout": "split-screen", "duration_s": 4.52, "fps": 25, "num_frames": 113, "width": 768, "height": 512, "captions": {"semantic": {"scene": "A split-screen video with two people shown side by side. On the left: A close-up shot of a young woman with dark hair, dimly lit in a dark environment. Her expression shifts from concerned or slightly resigned to wide-eyed and startled. On the right: A close-up shot of a man, indoors or in a very dark environment. He has dark, short hair and is wearing a dark, possibly greenish or blueish crew-neck shirt. The woman says, \"It's not over.\" Then the man replies, \"They're bad people.\" Two distinct voices. Quiet indoor room tone; no music, no singing.", "scene_audio": "A split-screen video with two people shown side by side. On the left: A close-up shot of a young woman with dark hair, dimly lit in a dark environment. Her expression shifts from concerned or slightly resigned to wide-eyed and startled. On the right: A close-up shot of a man, indoors or in a very dark environment. He has dark, short hair and is wearing a dark, possibly greenish or blueish crew-neck shirt. The woman says, \"It's not over.\" Then the man replies, \"They're bad people.\" Two distinct voices. Quiet indoor room tone; no music, no singing.", "stem0": "A woman, speaking. She says, \"It's not over.\"", "stem1": "A man, speaking. He says, \"They're bad people.\""}}, "stem_boxes": null, "source": {"dataset": "CelebV-HQ", "speech": "turn-taking", "stems": [{"stem": 0, "dataset": "CelebV-HQ", "side": "left", "celebvhq_clip_id": "EAd7cMSm4Ng_4", "youtube_id": "EAd7cMSm4Ng", "chunk_index": 0, "source_start_s": 0.36, "source_end_s": 1.48, "in_segment_start_s": 0.16, "in_segment_end_s": 1.28, "transcript": "It's not over."}, {"stem": 1, "dataset": "CelebV-HQ", "side": "right", "celebvhq_clip_id": "CVvEauIwLec_4", "youtube_id": "CVvEauIwLec", "chunk_index": 2, "source_start_s": 0.44, "source_end_s": 1.72, "in_segment_start_s": 1.56, "in_segment_end_s": 2.84, "transcript": "They're bad people."}]}, "mix": {"type": "sum of the two stems (mix = stem0 + stem1)", "peak_gain": 1.0}} | |
| {"segment": "splitscreen-0065", "family": "vgg_composite", "layout": "split-screen", "duration_s": 4.52, "fps": 25, "num_frames": 113, "width": 768, "height": 512, "captions": {"short": {"scene": "A video with two separate sound sources visible at the same time. One is An acoustic guitar. The other is Sea waves.", "scene_audio": "A video with two separate sound sources visible at the same time. One is An acoustic guitar. The other is Sea waves.", "stem0": "Sea waves.", "stem1": "An acoustic guitar."}}, "stem_boxes": {"format": "normalized xyxy, [stem][latent_frame][4]", "boxes": [[[0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707], [0.0195, 0.0293, 0.4805, 0.9707]], [[0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707], [0.5195, 0.0293, 0.9805, 0.9707]]], "valid": [true, true], "method": "split-screen halves"}, "source": {"dataset": "VGGSound / MUSIC-21 composite", "stems": [{"stem": 0, "dataset": "VGGSound", "youtube_id": "1K1hxgzudsM", "vggsound_start_s": 47, "window_offset_s": 4.5, "local_download_duration_s": 10.005, "youtube_start_s_approx": 51.5, "label": "sea waves", "visible": true, "side": "left"}, {"stem": 1, "dataset": "MUSIC-21", "music21_class": "acoustic_guitar", "youtube_id": "HGlIImajcRI", "window_offset_s": 75.0, "local_download_duration_s": 176.042, "youtube_start_s_approx": 95.0, "label": "playing acoustic guitar", "visible": true, "side": "right"}]}, "mix": {"type": "sum of the two stems (mix = stem0 + stem1)", "stem_level_dbfs": [-21.94, -21.94], "peak_gain": 1.0, "max_abs_mix_minus_stems": 0.0}} | |
| {"segment": "val-x71m-0002", "family": "generated", "layout": "generated", "duration_s": 4.52, "fps": 25, "num_frames": 113, "width": 768, "height": 512, "captions": {"positional": {"scene": "An instrument on the right, playing, and a sound on the left.", "scene_audio": "An instrument on the right, playing, and a sound on the left.", "stem0": "The instrument on the right, playing.", "stem1": "The sound on the left."}}, "stem_boxes": null, "source": {"dataset": "generated composite", "group": "generated clip + URMP player", "motion": "moving", "canvas_wh": [768, 512], "stems": [{"stem": 0, "side_at_start": "right", "kind": "urmp_player", "origin_segment": "07_GString_tpt_tbn_seg030", "origin_stem": 1, "dataset": "URMP", "piece": "07_GString_tpt_tbn", "instrument": "trombone", "part": 2, "track": "AuSep_2_tbn_07_GString.wav", "piece_start_s": 147.2, "window_start_s": 0.0, "description": "a musician playing the trombone, alone, no other instrument audible"}, {"stem": 1, "side_at_start": "left", "kind": "generated", "subject": "tractor", "generator": "LTX-2.3 22B (dev)", "generation_prompt": "A tractor drives steadily from the left edge to the right edge across the field, its diesel engine rumbling loudly as it crosses, no camera movement, still shot, crossing an open farm field. Nothing else in the frame moves. The tractor is the only sound source, realistic directional audio, no music.", "seed": 13004, "generation_steps": 30, "generation_resolution_wh": [768, 512], "generation_frames": 121, "generation_fps": 24.0, "window_start_s": 0.0, "description": "A tractor drives steadily across the field, its diesel engine rumbling loudly as it crosses, no camera movement, still shot, crossing an open farm field. Nothing else in the frame moves. The tractor is the only sound source, realistic directional audio, no music."}]}, "mix": {"type": "sum of the two stems (mix = stem0 + stem1)", "stem_gain_db": [14.27, -6.65], "stem_level_dbfs": [-21.94, -21.94], "peak_gain": 1.0, "max_abs_mix_minus_stems": 0.0}} | |
| {"segment": "val-x71s-0002", "family": "generated", "layout": "generated", "duration_s": 4.52, "fps": 25, "num_frames": 113, "width": 768, "height": 512, "captions": {"short": {"scene": "A video with two separate sound sources visible at the same time. One is A medium close-up shot features a young woman with long, wavy brown hair, partially pulled back from her face, revealing her forehead. She has fair skin, blue eyes, and is wearing pink/magenta lipstick. The other is A lawnmower is pushed steadily across the lawn, its engine droning loudly as it crosses, no camera movement, still shot, crossing an open grassy lawn. Nothing else in the frame moves.", "scene_audio": "A video with two separate sound sources visible at the same time. One is A medium close-up shot features a young woman with long, wavy brown hair, partially pulled back from her face, revealing her forehead. She has fair skin, blue eyes, and is wearing pink/magenta lipstick. The other is A lawnmower is pushed steadily across the lawn, its engine droning loudly as it crosses, no camera movement, still shot, crossing an open grassy lawn. Nothing else in the frame moves.", "stem0": "A young woman.", "stem1": "A lawnmower."}}, "stem_boxes": null, "source": {"dataset": "generated composite", "group": "generated clip + CelebV-HQ speaker", "motion": "static", "canvas_wh": [768, 512], "stems": [{"stem": 0, "side_at_start": "left", "kind": "celebvhq_speaker", "origin_segment": "celebvhq_turntaking_c1581_c940_seg001_slot0m-right-first1", "origin_stem": 1, "dataset": "CelebV-HQ", "celebvhq_clip_id": "EDEeyk50nDQ_1", "youtube_id": "EDEeyk50nDQ", "chunk_index": 2, "source_start_s": 0.0, "source_end_s": 1.0, "in_segment_start_s": 0.16, "in_segment_end_s": 1.16, "transcript": "I don't know.", "window_start_s": 0.0, "description": "A medium close-up shot features a young woman with long, wavy brown hair, partially pulled back from her face, revealing her forehead. She has fair skin, blue eyes, and is wearing pink/magenta lipstick. She is wearing a white, sleeveless top with a small, repeating geometric pattern. Her expression is animated as if speaking directly to the camera. The background is brightly lit, with a turquoise/teal element on the left and out-of-focus bokeh lights, possibly from string lights, in gold and other soft colors on the right, suggesting a colorful, possibly decorated, indoor setting."}, {"stem": 1, "side_at_start": "right", "kind": "generated", "subject": "lawnmower", "generator": "LTX-2.3 22B (dev)", "generation_prompt": "A lawnmower is pushed steadily from the left edge to the right edge across the lawn, its engine droning loudly as it crosses, no camera movement, still shot, crossing an open grassy lawn. Nothing else in the frame moves. The lawnmower is the only sound source, realistic directional audio, no music.", "seed": 13005, "generation_steps": 30, "generation_resolution_wh": [768, 512], "generation_frames": 121, "generation_fps": 24.0, "window_start_s": 0.0, "description": "A lawnmower is pushed steadily across the lawn, its engine droning loudly as it crosses, no camera movement, still shot, crossing an open grassy lawn. Nothing else in the frame moves. The lawnmower is the only sound source, realistic directional audio, no music."}]}, "mix": {"type": "sum of the two stems (mix = stem0 + stem1)", "stem_gain_db": [6.55, -5.31], "stem_level_dbfs": [-26.66, -26.66], "peak_gain": 0.580554, "max_abs_mix_minus_stems": 5.960464477539063e-08}} | |
| {"segment": "val-x71x-0003", "family": "generated", "layout": "generated", "duration_s": 4.52, "fps": 25, "num_frames": 113, "width": 768, "height": 512, "captions": {"short": {"scene": "A video with two separate sound sources visible at the same time. One is A drummer sits in an empty rehearsal room, no camera movement, still shot, even studio light across the otherwise empty frame. The drummer stays in place, tapping a steady pattern on a snare drum. The other is A motorbike rides steadily down the road, its engine buzzing loudly as it crosses, no camera movement, still shot, an empty coastal road. Nothing else in the frame moves.", "scene_audio": "A video with two separate sound sources visible at the same time. One is A drummer sits in an empty rehearsal room, no camera movement, still shot, even studio light across the otherwise empty frame. The drummer stays in place, tapping a steady pattern on a snare drum. The other is A motorbike rides steadily down the road, its engine buzzing loudly as it crosses, no camera movement, still shot, an empty coastal road. Nothing else in the frame moves.", "stem0": "A motorbike.", "stem1": "A drummer."}}, "stem_boxes": null, "source": {"dataset": "generated composite", "group": "generated clip + generated clip", "motion": "moving", "canvas_wh": [768, 512], "stems": [{"stem": 0, "side_at_start": "right", "kind": "generated", "subject": "motorbike", "generator": "LTX-2.3 22B (dev)", "generation_prompt": "A motorbike rides steadily from the right edge to the left edge down the road, its engine buzzing loudly as it crosses, no camera movement, still shot, an empty coastal road. Nothing else in the frame moves. The motorbike is the only sound source, realistic directional audio, no music.", "seed": 12004, "generation_steps": 30, "generation_resolution_wh": [768, 512], "generation_frames": 121, "generation_fps": 24.0, "window_start_s": 0.0, "description": "A motorbike rides steadily down the road, its engine buzzing loudly as it crosses, no camera movement, still shot, an empty coastal road. Nothing else in the frame moves. The motorbike is the only sound source, realistic directional audio, no music."}, {"stem": 1, "side_at_start": "left", "kind": "generated", "subject": "snare drum", "generator": "LTX-2.3 22B (dev)", "generation_prompt": "A drummer sits in the left third of an empty rehearsal room, no camera movement, still shot, even studio light across the otherwise empty frame. The drummer stays in place, tapping a steady pattern on a snare drum. The rest of the scene stays empty and still. The snare drum is the only sound source, realistic directional audio, no music.", "seed": 12011, "generation_steps": 30, "generation_resolution_wh": [768, 512], "generation_frames": 121, "generation_fps": 24.0, "window_start_s": 0.0, "description": "A drummer sits in an empty rehearsal room, no camera movement, still shot, even studio light across the otherwise empty frame. The drummer stays in place, tapping a steady pattern on a snare drum. The rest of the scene stays empty and still. The snare drum is the only sound source, realistic directional audio, no music."}]}, "mix": {"type": "sum of the two stems (mix = stem0 + stem1)", "stem_gain_db": [-0.56, 7.89], "stem_level_dbfs": [-26.94, -26.94], "peak_gain": 0.562151, "max_abs_mix_minus_stems": 5.960464477539063e-08}} | |