Sample output of possible IIIF AV Canvas from https://github.com/jronallo/abrizer

canvas.json

{
  "@context": "http://iiif.io/api/presentation/3/context.json",
  "id": "http://localhost:8088/v/pets/canvas.json",
  "type": "Canvas",
  "width": 720,
  "height": 540,
  "duration": 35.603,
  "thumbnail": {
    "id": "http://localhost:8088/v/pets/poster.jpg",
    "type": "Image",
    "format": "image/jpeg"
  },
  "media": [
    {
      "type": "Annotation",
      "motivation": "painting",
      "target": "http://localhost:8088/v/pets/canvas.json",
      "body": {
        "type": "Choice",
        "items": [
          {
            "id": "http://localhost:8088/v/pets/fmp4/stream.mpd",
            "type": "Video",
            "format": "application/dash+xml",
            "width": 720,
            "height": 540
          },
          {
            "id": "http://localhost:8088/v/pets/hls/master.m3u8",
            "type": "Video",
            "format": "application/x-mpegURL",
            "width": 720,
            "height": 540
          },
          {
            "id": "http://localhost:8088/v/pets/progressive-vp9.webm",
            "type": "Video",
            "format": "video/webm",
            "width": 720,
            "height": 540
          },
          {
            "id": "http://localhost:8088/v/pets/progressive.mp4",
            "type": "Video",
            "format": "video/mp4",
            "width": 640,
            "height": 480
          }
        ],
        "seeAlso": [
          {
            "id": "http://localhost:8088/v/pets/vtt/captions.vtt",
            "format": "application/webvtt",
            "label": "English captions",
            "language": "en",
            "_comments": "How make explicit how whether to use these as captions or subtitles, descriptions, or chapters?"
          },
          {
            "id": "http://localhost:8088/v/pets/sprites/sprites.vtt",
            "format": "application/webvtt",
            "label": "image sprite metadata",
            "_comments": "How to include resources like video image sprites like those created by https://github.com/jronallo/video_sprites and used by various players?"
          }
        ]
      }
    }
  ]
}