[MPlayer-users] Recording sound from line-in when grabbing tv

[mail-lists+mpu at dogphilosophy.net]

On my own system (also ALSA) I have to do the following to get sound:

Set "Line" to capture, MUTE "Line-In" (I don't know why), and have a positive
value in the "capture" channel.

If "alsamixer" reports both a "Line" and a "line-in", make sure "Line-in" in 
muted, and Line is set as the 'capture' port (and the "Line" volume is >0 ).

If you have a different sound chipset, the channel names may be different, but
I'm guessing your situation is similar to mine - it took me a while to figure
out that I needed to mute "Line-In" and record from "Line".

On Tuesday 09 September 2003 03:32 pm, JF L. wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>
> Hi,
>
> I have a problem with mencoder and I don't find an answer searching all
> archives... I am able to grabb video from my v4l device (rivatv driver) but
> I can't record sound. The sound comes from line-in, so I tried to use
> "forceaudio" and "adevice" like this:
>
> mencoder tv:// -tv
> driver=v4l:norm=SECAM:input=0:width=352:height=288:adevice=/dev/
> dsp:forceaudio -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=900 -oac mp3lame 
> -o output.avi -v
>
> or
>
> mencoder tv:// -tv
> driver=v4l:norm=SECAM:input=0:width=352:height=288:adevice=hw.0:alsa:forcea
>udio -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=900 -oac mp3lame  -o
> output.avi -v
>
> because I am using alsa. [...]