Preserve audio tracks names

[danielwerg]

Describe the bug
Lossless Cut renames audio tracks names on export

Expected behavior
Preserve audio tracks names instead of renaming them to Track N

Screenshots
VLC
Before:

After:

Desktop

• OS: Windows 10

Workaround
Is there a way to batch rename videos audio tracks names with some kind of cli?

[oliko-tk]

Pienso que es irrelevante.. eso lo puedes renombrar tu mismo.

[mifi]

any chance you could provide a file that has audio tracks with different names? I've never seen such a file

[danielwerg]

@mifi I record it using obs, what would be the best way for me to share example video with you?

[danielwerg]

@mifi here is dropbox link: https://www.dropbox.com/s/umixn6nb6byi36p/2022-06-03.mp4

[mifi]

Thanks. It seems like ffmpeg and ffprobe does not support reading track names/titles from mp4:

• https://superuser.com/questions/1600254/how-to-read-the-name-of-audio-track-using-ffmpeg
• https://superuser.com/questions/1632322/ffprobe-missing-title-tag-with-mp4-files

running ffprobe 2022-06-03.mp4:

[libdav1d @ 0x7f7f08705640] libdav1d 1.0.0-1-g87f9a81
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2022-06-03.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomav01iso2mp41
    encoder         : Lavf58.76.100
  Duration: 00:00:03.32, start: 0.000000, bitrate: 755 kb/s
  Stream #0:0[0x1](und): Video: av1 (Main) (av01 / 0x31307661), yuv420p(tv, bt709), 2560x1440, 32 kb/s, 60 fps, 60 tbr, 15360 tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 321 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 2 kb/s
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
  Stream #0:3[0x4](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 57 kb/s
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
  Stream #0:4[0x5](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 309 kb/s
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
  Stream #0:5[0x6](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 2 kb/s
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
  Stream #0:6[0x7](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 2 kb/s
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
[libdav1d @ 0x7f7f08719300] libdav1d 1.0.0-1-g87f9a81

However I tried recording with a custom audio track name from OBS using matroska instead of mp4, and importing to losslesscut, then exporting from losslesscut, and I can see that the audio track name is then preserved.

so maybe you can use mkv instead? then possibly use losslesscut to change it to mp4 and it might preserve the track names

[danielwerg]

@mifi Just tested and mkv indeed preserves track names. Thank you!