SRT multichannel audio

[topdog360]

Is it possible to have more than 2 audio channels(L+R) in an SRT stream from OBS? I have everything working between OBS and vMix with 2 channels(1 OBS track), but would like to test using 8 channels(4 x OBS tracks). I am using the advanced output record mode to URL. I have checked the boxes for audio tracks 1,2,3,4 and have 4 independent stereo sources assigned to those tracks. I however only receive 2 channels(OBS track 1) in vMix. If I change OBS to 7.1 vMix "sees" 8 channels but there is only audio on 1 and 2(OBS track 1). Am I missing something? Is there something that needs to be added in the encoder settings to trigger FFMpeg to encode more than 2 channels?

 

[topdog360]

I confirmed OBS is properly constructing the Mpeg TS stream by recording and verifying with MediaInfo. It appears to be a problem with how it is passing the TS to FFMPEG for SRT.

 

[topdog360]

Scratch that, I think the problem is with vMix not seeing the other audio PID's. I have found a work around though. Setting OBS to 7.1 and using the rematrix plugin to route your sources vMix receives 8 channels.