[MPlayer-users] Re: recording from video tapes (a novice question) NOVIRUS

[Wieslaw Kierbedz]

Uz.ytkownik Janusz S. Bien' napisa?:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
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> On 11 Aug 2003  Erik Slagter <erik at oldconomy.com> wrote:
> 
> [...]
> 
> Many thanks for long and detailed answer.
> 
> 
>>Keep in mind that your tv capturing card also has a mixer, which is
>>accessible via the v4l interface, not via /dev/mixer etc. Xawtv is able
>>to manipulate the settings, as the supplied command line util v4lctl.
> 
> 
> I had a look at the man pages of v4lctl but don't see its relevance to
> my problem.
> 
> 
>>Depending on the type of card you need to set up a loop from the tv
>>capturing card to an input of your sound card (makes easy testing) or
>>read your audio from the corresponding audio device.
> 
> 
> This is the first case, as I wrote in my previous posting of 11 Aug
> 2003:
> 
> 
>>My TV card is connected by a cable to Line input
>>of the sound card.
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> 
> 
> On 11 Aug 2003  Erik Slagter <erik at oldconomy.com> wrote:
> 
> 
>>To examplify:
>>
>>If you have an bt848 card, you only have analogue audio output, so you
>>need to connect the audio output to an input on your soundcard. Using
>>xawtv you should be able to check if your setup is ok. On xawtv set the
>>volume to max and make sure audio is not muted.
> 
> 
> I've done this already, as I wrote on 10 Aug 2003:
> 
> 
>>Please note I have no problem with sound when just watching TV with
>>mplayer, zapping or xawtv.
> 
> 
> On 11 Aug 2003  Erik Slagter <erik at oldconomy.com> wrote:
> 
> 
>>If your have a philips card, you will want to fetch the audio over the
>>pci bus, because the card goes through great lengths to ensure the video
>>and audio are deliverd synchronously. In that case also use xawtv to set
>>the v4l volume settings, and locate the extra sound and mixer devices.
>>Usually they are /dev/dsp1 and /dev/mixer1, but this may vary depending
>>on your setup. Now use sox to copy the input from /dev/dsp1 using
>>samplerate 32 Khz (!) to /dev/dsp and you should be able to hear the
>>audio via the "pcm" output of your soundcard. If that works, you can try
>>to record video and audio with e.g. mencoder, making sure that audio is
>>grabbed from your "extra" sound device (/dev/dsp1).
> 
> 
> My card has a Philips tuner but I guess this is not what you mean.
> Moreover I don't use the btaudio driver which, if I understand
> correctly, would provide the sound directly from the TV card.
> 
> I just noticed that a tvaudio driver is loaded, but I don't know what
> is its function.
> 
> 
> 
>>Also check the options "forchechans" and "forceaudio", the are required
>>on some v4l2 modules.
> 
> 
> Do you mean the parameters which are listed by modinfo -p... ?
> 
> 
>>If none of this works, try, while running xawtv, "cat -tv /dev/dsp" and
>>"cat -tv /dev/dsp1", etc. This will tell you which audio devices are
>>available and which actually deliver sound data.
> 
> 
> I get some output only from 
> 
>         cat -tv /dev/dsp
> 
> However, I get it also without running xawtv. Does it explain
> anything?
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> 
>>What capturing card do you have (or better: what chip is on it?)
> 
> 
> I wrote already on 10 Aug 2003:
> 
> [...]
> 
> 
>>I use an on-board sound card and my mainboard is ECS K7S5A. The
>>capture card is AverTV Studio 203.
> 
> 
> I enclose as attachment (I hope they are allowed on this list):
> 
> the output of v4l-info
> the output of lsmod
> the fragments of dmesg which seemed relevant to me
> 
> Best regards
> 
> Janusz
> 
> 


-- 
Wies?aw Kierbedz'
gg  2128870
www.v4l.prv.pl (video4linux - podstawy)