We have boads that have many audio input channels (e.g. 8), see "Source #2" in this listing https://gist.github.com/krieger-od/27824ae4e36f30655ac0 How should i specify a channel for Pulseaudio source name, particularly for FFmpeg Pulseaudio input? In other words, what value should i supply for "-i" parameter in my case? FFmpeg uses fourth parameter of pa_simple_new() to pass that: http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavdevice/pulse_audio_dec.c;h=ec94fe1b4ad3b455c9aa858dc47c94af845f9ae0;hb=HEAD#l78 Thanks in advance. -- Bluecherry developer.