[FFmpeg-user] Recording sound on FreeBSD 8

Victor Sudakov vas at mpeks.tomsk.su
Fri Sep 16 04:48:25 CEST 2011


My next goal is to multicast live sound. All my attemps to record
sound from a USB audio interface have resulted in a severely distorted
growl instead of normal voice. I have tried various parameters around

ffmpeg -f oss -i /dev/dsp1 -acodec libmp3lame -re -f rtp rtp://

or even simply 

ffmpeg -f oss -i /dev/dsp1 out.wav 

I suppose I need to adjust sampling rate or something like this. What
is the way to determine the correct parameters? Is there a way to
analyze the audio interface input? "cat /dev/sndstat" does not
give anything really useful.

The audio interface is not to blame because I use it all the time with
linphone for SIP calls.

TIA for any ideas.

Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov at sibptus.tomsk.ru

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