> > > Why are you adding -async 1000 ? > > To make sure sample count in packet will match packet DTS/PTS/Duration. I mean, if audio packet pts is 0...40ms...80ms... ==> packet duration is 40ms ==> 25 packets per second. If my audio is 48khz, stereo, pcm_s16le, I want every packet to contain 48000/25=1920 samples for every channel.