[Mageia-discuss] audio recording (from Line In) doesn't work in Mageia 2

[AL13N]

Op zaterdag 29 december 2012 14:07:23 schreef David Walser:
> David Walser wrote:
> > Christiaan Welvaart wrote:
> >> On Sat, 29 Dec 2012, David Walser wrote:
> >>> I have an ATI TV Wonder VE video card which doesn't handle audio
> >>> internally, it just pipes it out a 1/8" audio cable which you plug into
> >>> the Line In input in the sound card, and you record the audio from that.
> >>> For years, I've been using the script below to record TV from it.  The
> >>> aumix command sets the IGain mixer channel, which controls the volume of
> >>> the audio that gets recorded.  Up through Mageia 1, this worked fine.
> >>> Now in Mageia 2, I get no sound.
> >>> 
> >>> aumix -i 60
> >>> mencoder -tv
> >>> driver=v4l2:width=640:height=480:adevice=/dev/dsp:norm=ntsc:input=0
> >>> tv:// -o tv.avi -oac mp3lame -ovc lavc -lavcopts> 
> > acodec=libmp3lame:abitrate=64:vbitrate=1800:vhq -lameopts vbr=3:br=64
> > -srate 44100 -vf crop=608:456:14:10 > /dev/null 2>&1> 
> >>> aumix -i 0
> >> 
> >> Well all kinds of things can be wrong. Does the TV card output sound?
> > 
> > The TV card is fine, all that's changed is upgrading to mga2.
> > 
> >> Maybe the input selector of the sound card is set to microphone.
> > 
> > How would you check/change that?  Why would it get messed up all of a
> > sudden?> 
> >> Why are you using OSS instead of alsa directly?
> > 
> > That's what mencoder uses.  It should work fine.
> 
> I tried changing adevice=/dev/dsp to the following things, which all also
> didn't work: alsa:adevice=hw.0,0
> alsa:adevice=hw.0,1
> alsa:adevice=hw.0,2
> 
> Here are the sound and TV devices from lspcidrake.  This is smelling like a
> kernel bug to me. snd_hda_intel   : Intel Corporation|82801JI (ICH10
> Family) HD Audio Controller bt878           : Brooktree Corporation|Bt878
> Audio Capture [MULTIMEDIA_OTHER] (rev: 11) bttv            : Brooktree
> Corporation|Bt878 Video Capture [MULTIMEDIA_VIDEO] (rev: 11)
> >> Try to get things working with alsamixer if aumix doesn't work...
> > 
> > aumix seems to be working fine, it still sees the IGain channel and can
> > set it just fine.  I think something else is wrong.

it could still be that channels are being changed in kernel driver, perhaps 
you can with alsamixer try to select the correct line-in function, and up the 
volumes that could maybe have effect?