{
"fps": 24.0,
"canvas_config": { "width": 1280, "height": 720, "ratio": "16:9" },
"materials": { "videos": [ { "id": "v1", "type": "video", "path": "clip.mov", "duration": 5000000 } ] },
"tracks": [ { "type": "video", "segments": [
{ "id": "S1", "material_id": "v1", "source_timerange": { "start": 0, "duration": 2000000 },
"target_timerange": { "start": 0, "duration": 2000000 } } ] } ]
}