Re: [gentoo-user] Re: audio with TV crd

[Nick Rout]

On Sun, 23 Jul 2006 12:19:46 +0100
Uwe Thiem wrote:

> On 23 July 2006 02:38, Nick Rout wrote:
> > On Sat, 22 Jul 2006 10:18:48 +0100
>
> > I find that tv:// doesn't work at all when using composite in, but
> > /dev/video0 does.
>
> So far, I have to agree.
>
> >
> > My device also has one physical line in (two plugs, red=right, white=left),
> > but ivtvctl -A shows four line-ins! I find that all of -q1, -q2, -q3 work
> > with the line-in. -q0 is the tuner and -q4 is static.
> >
> > nick@media:~$ ivtvctl -A
> > ioctl: VIDIOC_ENUMAUDIO
> >         Input   : 0
> >         Name    : Tuner Audio In
> >
> >         Input   : 1
> >         Name    : Audio Line 1
> >
> >         Input   : 2
> >         Name    : Audio Line 2
> >
> >         Input   : 3
> >         Name    : Audio Line 3
> >
> >         Input   : 4
> >         Name    : Audio Line 4
> >
> > Are you really sure that there is an audio signal coming out the line thats
> > plugged into the line-in? (Obvious I know!)
>
> Yes. If I plug that line into Line IN of my soundcard I get audio. I actually
> tried to feed composite into the TV card and audio into my soundcard.
> Used "mplayer /dev/video0" and it kind of worked. But it isn't a solution for
> two reasons:
>
> 1.
> Audio and video are far out of sync that way.
>
> 2.
> My goal isn't to watch tapes but to burn old tapes to DVDs. For that, I need
> the MPEG2 stream coming out of /dev/video0 to be combined video and audio.
>
> Uwe

Yes, exactly. There is a delay for buffering or processing or something
inherent in the pvr card. There is no such delay through the sound card.

I suppose the card could be broken. Sometimes they are. Any chance of
taking it back to the shop and asking for another one?

Or *cough* trying it in windows?

I also wonder whether you should try either the mythtv-users list or the
ivtv-dev mailing lists. Probably the first thing they will ask for is
the log information from dmesg between these two lines:

ivtv:  ==================== START INIT IVTV ====================

necessary info

ivtv:  ====================  END INIT IVTV  ====================

Just looking at this I see mine contains:

tveeprom 0-0050: audio processor is CX25843 (idx 37)
tveeprom 0-0050: decoder processor is CX25843 (idx 30)


Also I note via lsmod that I have a cx25840 module loaded. Presumably
that takes care of the sound. It may pay to look at your output - there
are many variations of chipsets on these cards, particularly between PAL
and NTSC models. 


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Nick Rout <nick@×××××××.nz>

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