How can I convert an audio channel inside an AVAssetTrack to PCM?

Question

I'm trying to build an MTAudioProcessingTap that remixes the surround track of a video file. In order for that to work, I need to be able to convert each channel to PCM no matter what the source format is.

Do you guys know how can I identify each channel (figuring out what's left, center, surround left, etc) and attach a converter to each so it works inside my MTAudioprocessingTap?

Thank you so much. I can't find any info on this.

How did you go about getting all 6+ channels of audio into the MTAudioProcessingTap? I'm finding it mixes down to two (i.e., processingFormat->mChannelsPerFrame = 2 in the prepare callback). — Rogare, Apr 08 '16 at 21:23

score 0 · Answer 1 · answered Sep 12 '14 at 15:58

0

Figured out Core Audio takes care of everything with Audio Converter Services.

answered Sep 12 '14 at 15:58

awfulcode

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How can I convert an audio channel inside an AVAssetTrack to PCM?

1 Answers1