Re: Philips webcam questions

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On Tue, 24 Jul 2001, Greg Hosler wrote:

> I'm trying to get a USB Philips webcam working with either xawtv, webcam,
> and ultimately gnomemeeting. And I'm not having alot of luck.

The module returns only the camera native palette - YUV420/YUV420P.

> I can also load the philips decompression module (pwcx), which supposedly
> gains me access to add'l palettes, sizes, and frame rates.

It adds compression, but not palettes.

> xawtv

Use the latest (at least 3.56 works with my philips 680K)

> webcam
>
>         When I run webcam, I get the message:
>
>                 can't get rgb24 data
>
>         Well, it turns out that the default palettes available when you
>         load the module are: yuv420, yuv420p - addl pallets, including
>         rgb24 are only available once the decompressor is loaded, and
>         apparently need to be selected via an ioctl. but I cannot locate
>         a utility that will send this ioctl to the driver.

Really ?  I did not believe the compressor added palettes.  You need
to add 420(p) support to webcam.  See the ccvt library that Nemosoft
have on the philips camera pages at http://www.smcc.demon.nl/webcam/.

> gnomemeeting
>
>         gnomemeeting simply refuses to see the video device. No idea what's
>         going on yet, but I'm suspecting it might be related to the fact that
>         neither xawtv and/or webcam will work w/ this webcam.

If this is based on openh323, then try CVS openh323, and I have some
additional mods to openh323 for the philips.

> Question: has anyone successfully gotten a philips webcam to work w/ ANY of
> the above applications ?

Yes. *grin*

Mark

-- 
+-------------------------------------------------------------------------+
Mark Cooke                  The views expressed above are mine and are not
Systems Programmer          necessarily representative of university policy
University Of Birmingham    URL: http://www.sr.bham.ac.uk/~mpc/
+-------------------------------------------------------------------------+





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