#11223: -map 0:a does not skip disabled tracks
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Reporter: markshw2222 | Owner: (none)
Type: defect | Status: new
Priority: normal | Component:
| undetermined
Version: unspecified | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Description changed by markshw2222:
Old description:
> IPhone 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.
> In this case, the disable track also have no audio codec set, so
> conversion fails
>
> ./ffmpeg -y -i ~/Downloads/spatial_audio_test.MOV -map 0:v -map 0:a -c:v
> copy -c:a aac ~/multiaudio.mp4
>
> Failure:
> [aist#0:2/none @ 0x14a709b50] Decoding requested, but no decoder found
> for: none
New description:
IPhone 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.
In this case, the disable track also have no audio codec set, so
conversion fails
Apple spec: https://developer.apple.com/documentation/quicktime-file-
format/preparing_sound_and_subtitle_alternate_groups_for_use_with_apple_devices/
./ffmpeg -y -i ~/Downloads/spatial_audio_test.MOV -map 0:v -map 0:a -c:v
copy -c:a aac ~/multiaudio.mp4
Failure:
[aist#0:2/none @ 0x14a709b50] Decoding requested, but no decoder found
for: none
--
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Ticket URL: <https://trac.ffmpeg.org/ticket/11223#comment:3>
FFmpeg <https://ffmpeg.org>
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