Re: Capturing audio with mencoder and alsa

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Carl Weidling wrote:
> I have an abit av8 MB running slackware 10.1 (just build a
> new 2.6.18 kernel for it).  I am using the built-in
> VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio
> controller.
> 
> All I am trying to do is get stuff from my VCR onto the computer
> using mencoder (part of the MPlayer suite) and my TV capture
> card.  Now I also built Linux From Scratch on a different partition,
> using the old OSS sound system, and that works just find.  I use
> the ancient xmix program to select CD as my input and I record
> sound and video with mencoder.

So I guess the TV card is connected to the CD input on your
motherboard?

> I can even play back the files I capture under slackware using
> mplayer or xine.  But, when I capture videos under slackware with
> alsa, I get no sound.  I used:
> amixer set CD capture, and GUIs like kmix and alsamixer to try
> to select CD input for sound.  When I run alsamixer it shows
> CD as capture (only after using the amixer command, I haven´t
> figured out how to actually switch on capture in alsamixer),

Press Space when the input is selected.

> but it always shows volume as zero.  When I use kmix it shows CD
> as input with a high volume, but when I go to switches it only gives
> me input1 and input2 as input source select.  Why can it not be
> as simple as with xmix and oss?

An AC'97 codec has more controls than OSS is aware of.

Please show the output of "amixer contents".


Regards,
Clemens

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