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The audio track to use in decodeAudioData isn't specified #2375

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padenot opened this issue Jun 24, 2021 · 6 comments
Closed

The audio track to use in decodeAudioData isn't specified #2375

padenot opened this issue Jun 24, 2021 · 6 comments
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padenot commented Jun 24, 2021

At least Firefox and Chrome both pick the first track, respectively:

https://searchfox.org/mozilla-central/source/dom/media/webaudio/MediaBufferDecoder.cpp#257
https://source.chromium.org/chromium/chromium/src/+/main:media/filters/audio_file_reader.cc;l=71;drc=570d2d089d1d822d8b29111ea92d7e2e12cce67b;bpv=1;bpt=1
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rtoy commented Jun 28, 2021

I think the answer is that you can't select the track, and decodeAudioData won't be changed to allow for that. Use WebCodecs if you need this kind of control.

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rtoy commented Jun 29, 2021

I think what @padenot is saying is that we need to codify what track is used. We won't supply a way for the user to specify the track.

@padenot can provide more info about WebCodecs; I have not looked its capabilities.

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hoch commented Jul 22, 2021

7/22 Teleconf: write the spec text for the behavior which picks the first track.

@padenot padenot self-assigned this Jul 29, 2021
@padenot padenot transferred this issue from WebAudio/web-audio-api-v2 Aug 31, 2021
padenot added a commit that referenced this issue Aug 31, 2021
@padenot
decodeAudioData only returns the first track of a multi-track media file
15077f0 
This fixes issue #2375.
padenot added a commit that referenced this issue Aug 31, 2021
@padenot
decodeAudioData only returns the first track of a multi-track media file
02481df 
This fixes issue #2375.
@padenot padenot mentioned this issue Aug 31, 2021
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hoch commented Sep 3, 2021

Closed per #2376.

@hoch hoch closed this as completed Sep 3, 2021
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