Info: VODs in some rare cases can have a quality duplicated! 480p and 480p-2

[tuxayo]

It's just to have there the info about such an edge case if it happens to be an issue at some point and will be hard to reproduce.

https://twitch.tv/videos/2820808699 (expires in a day)
It's a VOD after wi-fi failed on the PC and the streamer switched to another PC to continue streaming.

It can play both 480p qualities, DL both 480p and 480p-2 qualities and it will match the same files. All good it seems :)

For long term, here is a dump of metadata with yt-dlp (so I don't know if there everything relevant for xtra, is there another tool to the dump data from a VOD besides yt-dlp?)

~ ❯❯❯ yt-dlp --dump-json https://twitch.tv/videos/2820808699 | jq
{
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  "title": "REACT / Tutelle, curatelle. (+ On teste le nouveau setup !)",
  "description": null,
  "duration": 11958,
  "thumbnails": [
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      "url": "https://static-cdn.jtvnw.net/cf_vods/d3stzm2eumvgb4/86073b6f28e9ff586f63_antipatriarcame_317242255588_1784144553//thumb/thumb0-90x60.jpg",
      "id": "0"
    },
    {
      "url": "https://static-cdn.jtvnw.net/cf_vods/d3stzm2eumvgb4/86073b6f28e9ff586f63_antipatriarcame_317242255588_1784144553//thumb/thumb0-0x0.jpg",
      "preference": 1,
      "id": "1"
    }
  ],
  "uploader": "antipatriarcame",
  "uploader_id": "antipatriarcame",
  "timestamp": 1784144558,
  "view_count": 643,
  "chapters": [
    {
      "title": "Politics",
      "start_time": 0,
      "end_time": 11958
    }
  ],
  "is_live": false,
  "was_live": true,
  "formats": [
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      "format_note": "storyboard",
      "ext": "mhtml",
      "protocol": "mhtml",
      "acodec": "none",
      "vcodec": "none",
      "url": "https://d3stzm2eumvgb4.cloudfront.net/86073b6f28e9ff586f63_antipatriarcame_317242255588_1784144553/storyboards/2820808699-low-0.jpg",
      "width": 160,
      "height": 90,
      "fps": 0.016725204883759826,
      "rows": 40,
      "columns": 5,
      "fragments": [
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          "duration": 11958.0
        }
      ],
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      "aspect_ratio": 1.78,
      "filesize_approx": null,
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        "Sec-Fetch-Mode": "navigate"
      },
      "format": "sb1 - 160x90 (storyboard)"
    },
    {
      "format_id": "sb0",
      "format_note": "storyboard",
      "ext": "mhtml",
      "protocol": "mhtml",
      "acodec": "none",
      "vcodec": "none",
      "url": "https://d3stzm2eumvgb4.cloudfront.net/86073b6f28e9ff586f63_antipatriarcame_317242255588_1784144553/storyboards/2820808699-high-0.jpg",
      "width": 220,
      "height": 124,
      "fps": 0.016725204883759826,
      "rows": 10,
      "columns": 5,
      "fragments": [
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          "url": "https://d3stzm2eumvgb4.cloudfront.net/86073b6f28e9ff586f63_antipatriarcame_317242255588_1784144553/storyboards/2820808699-high-0.jpg",
          "duration": 2989.5
        },
        {
          "url": "https://d3stzm2eumvgb4.cloudfront.net/86073b6f28e9ff586f63_antipatriarcame_317242255588_1784144553/storyboards/2820808699-high-1.jpg",
          "duration": 2989.5
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        {
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          "duration": 2989.5
        },
        {
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      ],
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        "Accept-Language": "en-us,en;q=0.5",
        "Sec-Fetch-Mode": "navigate"
      },
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    },
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      },
      "format": "Audio_Only - audio only"
    },
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      "ext": "mp4",
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      "preference": null,
      "quality": null,
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      "audio_ext": "none",
      "vbr": null,
      "abr": null,
      "resolution": "284x160",
      "aspect_ratio": 1.77,
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      "preference": null,
      "quality": null,
      "has_drm": false,
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      },
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  "webpage_url_basename": "2820808699",
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  },
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  "filename": "REACT ⧸ Tutelle, curatelle. (+ On teste le nouveau setup !) [v2820808699].mp4",
  "_type": "video",
  "_version": {
    "version": "2026.07.04",
    "current_git_head": null,
    "release_git_head": "997fa140840a08df3938b40da470c78049fef1f6",
    "repository": "yt-dlp/yt-dlp"
  }
}

[crackededed]

this vod has 2 480p qualities with different bitrates. it looks like the source quality has a lower bitrate than the other 480p quality so they probably look the exact same.

this should be handled correctly everywhere in xtra since 2c582bb except for the visual issue in DownloadDialog. normally, like when changing quality for the player, each quality has more info about them than just the name so that it's possible to select one of the qualities even if they have the same name.

the drop down quality picker in download dialog uses a text field so we only know that the selected quality is "480p" but don't know which bitrate. so the 480p-2 is there so you can pick the other quality.

is there another tool to the dump data from a VOD besides yt-dlp?

in xtra, if using the debug build and OkHttp is selected in settings, network requests will be shown in the log.

on pc web browser, you can open the dev tools, switch to network tab, open the vod page, search for usher.ttvnw.net, click on the request, switch to response tab and you can see the m3u8 playlist from there.

for other info about the video, you have to search for gql and it will be there somewhere.

here's what the qualities look like on the playlist. the BANDWIDTH value is the bitrate:

#EXT-X-STREAM-INF:BANDWIDTH=839072,CODECS="avc1.4D401F,mp4a.40.2",RESOLUTION=852x480,FRAME-RATE=30.000,STABLE-VARIANT-ID="480p",IVS-NAME="480p",IVS-VARIANT-SOURCE="source"
#EXT-X-STREAM-INF:BANDWIDTH=1438977,CODECS="avc1.4D401F,mp4a.40.2",RESOLUTION=852x480,FRAME-RATE=30.000,STABLE-VARIANT-ID="480p30",IVS-NAME="480p",IVS-VARIANT-SOURCE="transcode"
#EXT-X-STREAM-INF:BANDWIDTH=698359,CODECS="avc1.4D401E,mp4a.40.2",RESOLUTION=640x360,FRAME-RATE=30.000,STABLE-VARIANT-ID="360p30",IVS-NAME="360p",IVS-VARIANT-SOURCE="transcode"
#EXT-X-STREAM-INF:BANDWIDTH=279008,CODECS="avc1.4D400C,mp4a.40.2",RESOLUTION=284x160,FRAME-RATE=30.000,STABLE-VARIANT-ID="160p30",IVS-NAME="160p",IVS-VARIANT-SOURCE="transcode"