[MPlayer-users] record from TV ( v4l ) with sound

Jindrich Makovicka makovick at kmlinux.fjfi.cvut.cz
Tue Oct 22 00:13:03 CEST 2002


root wrote:

>[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>It is very easy to record sound from a TV-input-source ( v4l ). The only
>thing you need is a soundcard that supports FULL DUPLEX!!! Your
>soundcard must be able to record sound while it is playing. If you
>already tryed to record from your tuner ( not composite ) you would hear
>the sound of the TV but it doesn't record at the same time. You have to
>check out if your soundcard offers the two  following options : "
>snd_dma1 and snd_dma2 " Y
>( You need two direct memory access channels for recording and playing
>at the same time )
>Even older soundcards often support full duplex. I have got an AMD
>InterWave soundcard from 1995 and recording works fine. 
>Further you have to enable the full duplex option of your soundserver
>under KDE ( I'm using KDE 3.0.2 and SuSE 7.3 ) There is a special
>application in my preference menu called "soundserver" to activate this
>option. I'm sure you'll find it! I used the following commandline:
>
>mencoder -tv on:driver=v4l:width=480:height=200:input=0:outfmt=i420 -vc
>rawi420 -vop yuv2 -oac mp3lame -ovc divx4 -o file.avi
>  
>Good Luck, enjoy your first self-recorded TV-spot!!!!
>Tobias Burkert
>
>_______________________________________________
>RTFM!!!  http://www.MPlayerHQ.hu/DOCS
>Search:  http://www.MPlayerHQ.hu/cgi-bin/htsearch
>http://mplayerhq.hu/mailman/listinfo/mplayer-users
>
This is rather an issue of the KDE sound server. There's no reason why 
mencoder shouldn't work with half duplex cards when there's no other app 
holding /dev/dsp. But thanks for info anyway.

-- 
Jindrich Makovicka





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