File size: 2,697 Bytes
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"schema_name": "stats_media_json",
"schema_version": 1,
"artifact": "stats/media.json",
"format": "json",
"description": "Physical media/storage summary and validation for released MP4 variants. Dataset scale is counted once in stats/summary.json.",
"source_artifacts": [
"sample_index.parquet",
"row_index.parquet",
"manifest.parquet",
"shards_manifest_720p.json",
"shards_manifest_360p.json",
"schema/media.json"
],
"fields": [
{
"name": "schema_version",
"json_type": "integer",
"value": 1
},
{
"name": "generated_at_utc",
"json_type": "string"
},
{
"name": "dataset_media",
"json_type": "object",
"description": "Resolution-agnostic media constants for the released dataset."
},
{
"name": "by_resolution",
"json_type": "object",
"description": "Physical storage and MP4 validation summary keyed by media variant, e.g. 720p and 360p."
},
{
"name": "validation",
"json_type": "object",
"description": "Aggregate media validation checks across all released MP4 members."
}
],
"dataset_media": {
"required_fields": [
"fps",
"tick_rate",
"audio_channels",
"available_resolutions",
"canonical_resolution",
"training_resolution"
]
},
"by_resolution_entry": {
"required_fields": [
"role",
"video_width",
"video_height",
"video_codec",
"pixel_format",
"audio_codec",
"audio_profile",
"audio_channels",
"sample_count",
"video_member_count",
"shard_count",
"shard_bytes",
"mp4_bytes",
"mean_mp4_bytes",
"median_mp4_bytes"
],
"optional_fields": [
"derived_from"
]
},
"validation_fields": [
"all_videos_decode",
"all_videos_have_stereo_audio",
"all_videos_faststart",
"all_videos_yuv420p",
"missing_video_members",
"missing_audio_streams",
"duration_mismatch_count"
],
"validation": [
"dataset_media.available_resolutions includes 720p and 360p",
"dataset_media.canonical_resolution == 720p",
"dataset_media.training_resolution == 360p",
"by_resolution.720p.role == canonical_render",
"by_resolution.360p.role == training_convenience_derivative",
"by_resolution.360p.derived_from == 720p",
"sample_count is identical across released resolutions",
"video_member_count == sample_count for each released resolution",
"validation.all_videos_decode is true",
"validation.all_videos_have_stereo_audio is true",
"validation.missing_video_members == 0",
"validation.missing_audio_streams == 0"
]
}
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