When I send 4 videos though SRT or TCP to vMIX, all of them with audio track or all of them without audio track, everything works well in terms of inputs synchronization. Frames are well synchronized amongst all inputs.

The problem appears when I combine some inputs with audio track with others without audio track. The inputs with the audio track are delayed between 4 and 6 frames respect to the video without audio track.

I don't know where the problem can come from. Is it a known vMIX issue? any suggestion apart from sending all with or all without an audio track?

Thanks in advance.

Marcel.