[MPlayer-users] Can't record tv audio

[Paulo Cavalcanti]

snd_bt87x is broken in kernels 2.6.13, 2.614, and 2.6.15. They do not create
/dev/dsp2 or /dev/audio2, although the modules are loaded. In kernel
2.6.16they seem to be back, but I did not test. A guy from the alsa
project told
me that this problem is fixed in alsa 1.0.11.rc3, and will be available in
kernel 2.6.17.

I had the same problem you are having now with kernel 2.6.15. I upgraded
mplayer to a recent cvs version (March 25, 2006) and video4linux to a
snapshot from March 30, 2006, and got the sound back in mplayer.  But in my
case, if I used kernel 2.6.14 or below, I  had no problem with mplayer sound
while watching TV. However, my distro is Fedora 4.

If you are compiling the kernel, I think it is easier for you to compile
just the video4linux modules from Mercurial, and update the modules.

/Paulo Roma.

On 4/4/06, Jorge Peixoto de Morais Neto <JorgePeixoto at redecasd.ita.br>
wrote:
>
> I have tried 2.6.14 but it still does not work. Besides, I compiled 2.6.14with snd_bt87x support built in (not as a module, but built-in) , and the
> command  arecord -D hw:2,1 -r 128000 -f S16_LE -t wav | aplay results only
> in the message
> ALSA lib pcm_hw.c:1305:(_snd_pcm_hw_open) Invalid value for card
> arecord: main:544: audio open error: No such device
> aplay: playback:2006: read error
>
> This error message appears with tvtime running or not.
>
>
> Interestingly, there is no mention to snd_bt87x in dmesg ; nor in arecord
> -l. Is there something wrong?
>
>
> On Tue, 4 Apr 2006 09:12:55 -0300
> "Paulo Cavalcanti" <promac at gmail.com> wrote:
>
> > What kernel are you using?
> >
> > bttv (video4linux module) from kernel 2.6.15 has problems, and you will
> not
> > have audio in mplayer/mencoder, indeed. Try an older kernel (2.6.14),
> > or update your video4linux modules to a recent snapshot.
> >
> > Since I think you read portuguese, you can check the link below where I
> > explain how to
> > make a pixelview card work, get vide4linux from Mercurial repositories (
> > http://linuxtv.org/hg/),
> > etc...
> >
> > http://orion.lcg.ufrj.br/~roma/LCG_computadores.html#captura
> >
> >  /Paulo Roma.
> >
> > On 4/4/06, Jorge Peixoto de Morais Neto <JorgePeixoto at redecasd.ita.br>
> > wrote:
> > >
> > > I have a tuner card working perfectly with tvtime, but I can't get
> audio
> > > out of it in mplayer or mencoder ; I can only get the picture. I have
> tried
> > > different commands like
> > > "gmplayer -tv driver=v4l2:norm=pal-m:channel=5 tv://". I have already
> > > googled a lot and would appreciate some help. Some technical
> information:
> > > Distro: latest gentoo
> > > mplayer version: mplayer-1.0.20060217
> > >
> > > kernel compiled whithout oss emulation
> > >
> > > The card is a Pixelview Playtv (don't know which exact model). Output
> of
> > > lspci:
> > > 00:0b.0 Multimedia video controller: Brooktree Corporation Bt878 Video
> > > Capture (rev 11)
> > > 00:0b.1 Multimedia controller: Brooktree Corporation Bt878 Audio
> Capture
> > > (rev 11)
> > > 00:0c.0 Multimedia audio controller: C-Media Electronics Inc CM8738
> (rev
> > > 10)
> > >
> > > I use with the module bttv ; the parameters to bttv are "card=37
> > > tuner=43".
> > >
> > > The audio output of the card is connected to the line in of the sound
> > > card.
> > > --
> > > Software is like sex: it is better when it is free. --Linus Torvalds
> > >
> > > _______________________________________________
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> > > MPlayer-users at mplayerhq.hu
> > > http://mplayerhq.hu/mailman/listinfo/mplayer-users
> > >
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>
>
> --
> Software is like sex: it is better when it is free. --Linus Torvalds
>
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