I had a need to split a stream with multi-channel audio into several streams with 1 stereo track.
The source stream comes as SRT and contains 4 stereo tracks (8 audio channels). It is necessary to transcode it into 4 streams containing 1 stereo track each (1 stream - audio channels 1+2, 2 stream - audio channels 3+4, etc.) Video in all streams is the same. transcoded streams are taken from Wowza via rtmp.
Best regards, Eugene