[FFmpeg-user] ffmpeg - equivalent of mencoder's immediatemode=0
paziu at yahoo.com
Tue Jul 10 00:39:39 CEST 2012
> Mike F <paziu <at> yahoo.com> writes:
>> if I try to use ffmpeg, I get no sound:
>> ffmpeg -y -f video4linux2 -i /dev/video0 -f alsa -i hw:1,0
This is the fourth day I am trying to find what is causing ffmpeg not to be able to capture audio from Pinnacle - v4l2...
mencoder has no issues, but I >>need<< to use ffmpeg along with ffserver
Although I could pipe output from mencoder to ffmpeg to ffserver via FIFO or 'bfr', but too much overhead, buffer underruns, etc....
Finally I ran 'v4lctl list' and I found out, that it is.... MUTED by default.
mute | bool | on | on |
It was not my suspicion, since:
1> alsamixer did not show MUTE, level was good
2> mencoder was able to capture without any problems, every time....
3> ffmpeg was able to capture audio ONLY if I did not include v4l2 to also get the video.....
# v4lctl volume mute off
ffmpeg started capturing audio and video...
Is there any way, to send a v4l2 cmd as a ffmpeg argument - similar to what mencoder does with forceaudio and immediatemode=0 or similar to 'v4lctl volume mute off' ?
ps: I cannot believe that this took me 4 days... sounds like a bad joke
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