Changes between Version 1 and Version 3 of Ticket #11223


Ignore:
Timestamp:
Oct 2, 2024, 10:43:50 PM (2 years ago)
Author:
markshw2222
Comment:

Legend:

Unmodified
Added
Removed
Modified

  • Ticket #11223 – Description

    v1 v3  
    11IPhone 16 introduced spatial audio. They use multiple audio tracks to carry audio. One track is enabled the other is disabled. When specifying -map 0:a ALL audio tracks are iterated including disabled tracks.
    22In this case, the disable track also have no audio codec set, so conversion fails
     3
     4Apple spec: https://developer.apple.com/documentation/quicktime-file-format/preparing_sound_and_subtitle_alternate_groups_for_use_with_apple_devices/
    35
    46./ffmpeg -y -i ~/Downloads/spatial_audio_test.MOV -map 0:v -map 0:a -c:v copy -c:a aac ~/multiaudio.mp4