2009/6/19 Igor Chernenko <[email protected]> > This works (ffmpeg, alsa, USB): > > ffmpeg -f alsa -ar 44100 -ac 1 -i plughw:1,0 -acodec pcm_s16le > alsa-exp-1.wav > > arecord -D plughw:1,0 -d 10 -r 44100 -c 1 -f S16_LE -t wav alsa-exp-2.wav > > > On Fri, Jun 19, 2009 at 11:46 AM, Nicolas Krieger <[email protected]> > wrote: > > > 2009/6/19, Stefano Sabatini <[email protected]>: > > > > > > On date Wednesday 2009-06-17 17:14:54 +0200, Nicolas Krieger encoded: > > > > > > > Hi, > > > > > > > > I need some help about audio grabbing. > > > > > > > > I would like to know what doess ffmpeg uses to grab audio. Does it > uses > > > oss > > > > or alsa ? > > > > > > > > > FFmpeg/libavdevice can grab from ALSA, OSS or jack. > > > > > > As an example of the latter: > > > ffmpeg -f jack -i JACK_READABLE_CLIENT_ID jackout.wav > > > > > > The same can be done programmatically using the libavdevice API. > > > > > > > > > > What I do is to open /dev/dsp with oss format (av_find_input_format). > > So, > > > I > > > > think that I'm using oss. > > > > > > > > How to do to use alsa ? > > > > > > > > > I think you need to explicitely specify the demuxer, alsa in this > > > case, I'm not sure FFmpeg is smart enough to figure it out by itself > > > from the name of the device. > > > > > > HTH, regards. > > > > > > > > > > Yes, that's it, I would like to use alsa programmatically, but I haven't > > found how to do. > > But I am not recording from an usb sound card, I just want to record from > > the "default" sound card. > > > > Thanks for the answers > > Nicolas Krieger >
I realize that I didn't told you that I am not using latest version of ffmpeg and I have just seen that ALSA support has been added in version 0.5... I can't change the version of ffmpeg I am using. But I have already done some updates in my code for playing, and I don't think it will be difficult to update for grabbing. Thanks Nicolas Krieger _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
