Re: [MLUG] Failed Webcam Install + Also Jpeg Encoding

[Nimrod Levy <EMAIL:PROTECTED>]

This is really interesting because I have a Logitech Quickcam
Messenger that would only work in Windows (except on one XP machine,
but that's a different story).  I recently (2 days ago) switched
entirely from FreeBSD to Arch Linux just so I could compile and a
driver I found for this camera.

I don't know what kind of camera you have, but this works reasonably
well on mine.  Not the best quality, but it seems to work with
gnomemeeting fine.  Microphone too.  I think the top button even shows
up as an input device.

Here's the URL for the driver.
http://home.mag.cx/messenger/

--
Nimrod

On Fri, 11 Feb 2005 14:43:37 -0600, Christian M. Cepel
<EMAIL:PROTECTED> wrote:
> After educating myself a bit last night, I learned that there is no hope
> of using my Logitech QuickCam IM with *nix.  There are no drivers
> available, and it's beyond the scope of this hobby for me to sit down
> and write drivers.
> 
> There are drivers for lots of other QuickCam cams, but not this newer
> one that has some special hardware for recording video.
> 
> In hindsight this was the first thing I should have done, not the
> last... I guess I just saw 'QuickCam' support and figured....  well... I
> figured wrongly.
> 
> Also, I posted a while back wondering why I was getting macropixeling on
> images that were 100% quality Jpegs.
> 
> Turns out it's not the software.  It's the chip in the cam.  It's
> applying huffman encoding and quantizing every 4th or 8th bit before the
> image data leaves the cam.  The reason for this?  Less bandwidth across
> the USB cable... Considering that even with this turned on it pretty
> much sucks down all the available bandwith across the USB buss (You
> can't have another device on that buss and expect it to function),
> having it NOT turned on would make video at 640x480 impossible.
> Unfortunately I don't want video... I want a snapshot every 15 - 30
> seconds, but alas, it's not a configurable option.
> 
> I did find one gentleman who had reverse engineered what had previously
> been an unknown encoding algorithm, and as far as I can tell wrote a
> driver to prevent the encoding (or is it just to decode it?  I didn't
> completely understand).
> 
> Anyways.. I guess I get to take it back to Win2k tonight.
> --
> 
> |Christian Marcus Cepel           | And the wrens have returned &
> EMAIL:PROTECTED icq:12384980 | are nesting; In the hollow of
> 371 Crown Point, Columbia, MO    | that oak where his heart once
> 65203-2202 573.999.2370          | had been; And he lifts up his
> Computer Support Specialist, Sr. | arms in a blessing; For being
> University of Missouri-Columbia  | born again. --Rich Mullins|
> 
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