Thanks a lot for quick response Nicolas! Yes, I remember our earlier conversation on thread "FFmpeg channel layouts".
Today, actually after a gap I was resuming on mapping the decoded data as per metadata info (as per the codec standard) and FFmpeg provided channel layout. In my case, I know the exact input codec standard so I was thinking to map standard defined channel order with FFmpeg provided one with a sort of custom implementation as we had concluded last. However, just then I came across AV_CH_LAYOUT_NATIVE option which seems to do something as well with a couple of 6ch AAC streams I tried with. I could see the channel ordering being changed in Audacity by looking at the waveform of decoded PCM. Hence today's questions. Being more involved in video, I do not have much idea in audio encoding. So my sincere apologies for repeating our last conversation in this thread a bit. When you say that "When the audio is compressed, there is no order of channels, the channels are encoded together to use the fact that they contain usually a lot of similarity.". My question is what are the standard defined channel order then? Example: As per ATSC A/52:2012, *coded channel layout* in a 5.1 E-AC3 stream is [L, C, R, Ls, Rs, LFE] ?
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