mpv don't show audio tracks' titles in mp4 files

[Nes-si]

Important Information

• mpv version: v0.33.0
• macOS Version: 10.14.6
• Source of the mpv binary

Reproduction steps

Open the sample file, then call Playback - Show tracks.
I haven't a config file.

Expected behavior

Showing audio track's titles like in VLC, MediaInfo.

Actual behavior

mpv don't show audio tracks' titles in mp4 files.

What I see in mpv:

And what I see in MediaInfo (I've set off track titles — MVO and ORT):

VLC also shows track titles:

Log file

Link

Sample files

Sample

[Akemi]

this isn't an issue, this is a feature request.

[jeeb]

This should get fixed as this patch gets through review and merged :) .

This sample contains the track titles in at the very least:

• handler name (which is supposed to be the description of the handler type (audio, video, subtitles etc) for debugging/inspection and not usable for media title purposes)
• In two boxes within the udta "user data" box

  [udta: User Data Box]
      position = 3991500
      size = 71
      [name]
          position = 3991508
          size = 28
      [titl]
          position = 3991536
          size = 35
  

  • If I read QTFF specification properly, name is not supposed to be a end user facing name?
  • titl is actually a proper media title box specified by 3GPP. This is what I ended up implementing :) .