For the Video guys, Mark?

Dave Andruczyk djandruczyk at yahoo.com
Wed Aug 27 17:07:18 EDT 2003


turn down any other unused channels.  an uunused channel with the mixer turned
up will amplify noise,  onboard sound is particularily noisy due to the
proximity to high freq circuitry and the switching regulators for the CPU(s)

--- Cyber Source <peter at thecybersource.com> wrote:
> One other question with this,
>   I can record from the tuner card into an avi file and the video and
> sound work now but there is alot of noise on the sound, really annoying
> interference noise. I have tried all sorts of sound formats, 8bit mono,
> 16bit mono, stereo, nothing seems to change the sound quality, but the
> files size change so it must be changing the sound format. After alot of
> trial and error, I found that it will not record sound with igain muted
> and it will not play sound via mplayer with pcm muted (i did see that
> mplayer uses pcm as it's output so that is understandable) but I dont
> understand this igain. I have tried lowering the volumes to help but the
> noise is unchanged. Any ideas on this interference noise?
> btw, this is using onboard sound (via8233) with ALSA.
> I know about using onboard anything but all the mb's today come with
> sound and using ALSA, they have been working flawlessly 
> 
> 
> On Tue, 2003-08-26 at 22:30, Dave Andruczyk wrote:
> 
> > run "alsamixer" from a terminal window (or console),  use the arrows to
> move to
> > "Line in" and hit the spacebar to toggle the record flag..
> > 
> > 
> > --- Cyber Source <peter at thecybersource.com> wrote:
> > > I am using ALSA, and I am using the line-on on my sound card. Where
> > > would one tell it to record sound from line-in?
> > > On Tue, 2003-08-26 at 21:54, Mark Musone wrote:
> > > 
> > > > You unless you have btaudio enabled (most likely not) you need to
> > > > connect the audio out of your tv tuner card to  the line-in of your
> > > > soundcard..
> > > > 
> > > >  
> > > > 
> > > > you can only watch tv with sound because the tv tuner card does a
> > > > “pssthru” directly to your speakers…it doesn’t go to your CPU
> (and
> > > > therefore it can’t be recorded)
> > > > 
> > > >  
> > > > 
> > > > in order to record something, you need to pipe sound to the line-in of
> > > > your soundcard..
> > > > 
> > > >  
> > > > 
> > > > IF you already have it going to the line-in of your soundcard, you
> > > > then need to make sure that the soundcard settings are setup to
> > > > 
> > > > RECORD from line-in. I’m not sure if your using alsa or oss for
> sound,
> > > > but whatever you use to adjust the sound settings,
> > > > 
> > > > you should be able to use that to tell it to record from line-in
> > > > 
> > > >  
> > > > 
> > > > -Mark
> > > > 
> > > > (the video guy :&) )
> > > > 
> > > >  
> > > > 
> > > >  
> > > > 
> > > >  
> > > > 
> > > > -----Original Message-----
> > > > From: owner-nflug at nflug.org [mailto:owner-nflug at nflug.org] On Behalf
> > > > Of Cyber Source
> > > > Sent: Tuesday, August 26, 2003 7:58 PM
> > > > To: nflug at nflug.org
> > > > Subject: For the Video guys, Mark?
> > > > 
> > > >  
> > > > 
> > > > Ok, I have one for the video guys. I have been getting ALOT of
> > > > requests for DVD and AVI's for Linux, that is people want to use there
> > > > Linux boxes to create DVD's, AVI's, etc. Just to keep it simple for
> > > > now, I would like to limit my question to this,
> > > > I have installed an AverTV TV Tuner Card, works great! I have all the
> > > > config's the way I think they should be but I probably have something
> > > > wrong due to the lack of info in the man page (xawtvrc). Anywho, my
> > > > problem is this, I have never been able to create an avi file with the
> > > > xawtv program until now, actually works great with very nice capture,
> > > > however, I cannot for the life of me get the sound to get recorded.
> > > > The sound works great using the TV part of it. I will include a copy
> > > > of my ‾/.xawtv file below.
> > > > Also, one thing of note, could be important or at least a clue, I have
> > > > to start xawtv with "xawtv -c /dev/video0" instead of just with
> > > > "xawtv". I read the man page and it says that /dev/video0 is the
> > > > default anyway, so I really don't see why I need to specify the whole
> > > > thing with the -c option.
> > > > Here is an excerpt from the man page on xawtv (notice how it says that
> > > > Xvideo support would be lost, is that why my sound isn't being
> > > > recorded?)
> > > > ‐c, ‐device device
> > > >               set video4linux device (default is  /dev/video0).  
> > > > This  option
> > > >               also disables Xvideo support.
> > > >               Resource: xawtv.device (string).
> > > > Here is the ‾/.xawtv file I am using
> > > > 
> > > > [global]
> > > > freqtab = us-cable
> > > > keypad-ntsc = on
> > > > fullscreen = 1024 x 768
> > > > input = Television
> > > > mixer = line
> > > > mov-driver = avi
> > > > mov-video = rgb24
> > > > mov-audio = stereo
> > > > 
> > > > [defaults]
> > > > norm = ntsc
> > > > audio = stereo
> > > > capture = grabdisplay
> > > > 
> > > > Thanks in advance to anyone who can help!!!
> > > > 
> > > > -- 
> > > > Cyber Source <peter at thecybersource.com> 
> > > > 
> > > > 
> > > >  
> > > > 
> > > > 
> > > > ---
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> > > > 
> > > > 
> > > > 
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> > > 
> > > -- 
> > > Cyber Source <peter at thecybersource.com>
> > > 
> > 
> > =====
> > Dave J. Andruczyk
> > 
> > __________________________________
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> 
> -- 
> Cyber Source <peter at thecybersource.com>
> 


=====
Dave J. Andruczyk

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