{
"fps": 25,
"canvas_config": { "width": 1080, "height": 1920, "ratio": "9:16" },
"materials": {
"videos": [ { "id": "v1", "type": "video", "path": "/abs/a.mp4", "duration": 10000000 } ]
},
"tracks": [
{ "type": "video", "segments": [
{ "id": "ok", "material_id": "v1", "source_timerange": { "start": 0, "duration": 1000000 },
"target_timerange": { "start": 0, "duration": 1000000 }, "extra_material_refs": [ "nope" ] },
{ "id": "lost", "material_id": "missing", "source_timerange": { "start": 0, "duration": 1000000 },
"target_timerange": { "start": 1000000, "duration": 1000000 } }
] },
{ "type": "hologram", "segments": [] }
]
}