[GEM-dev] webcam logitech quickcam pro 5000 w/ linux

[Thoralf Schulze]

hi mathieu,

thank you for your answer ...

[quickcam pro 5000 with uvc]
> driver. The uvc driver is still very new, and last
> time I checked, it 
> seemed a bit flaky, though maybe this has already
> changed (?).
it seemed to be quite stable with the few applications
that support its v4l2-interface - namely, ekiga and
its very own uvcview.

[v4l/v4l2]
> redefining ioctl to be something else, so as far as
> V4L2 goes, there's no 
> difference between the user and the userspace,
> because it's just a kernel 
> interface.

> This basically means that V4L2 is difficult to
> support because one is 
> supposed to be supporting all of its color models.
> (Is it me, or the 
> smiley makes it sound worse than without a smiley?)

phew, that might be okay from a kernel programmers
viewpoint - it really sucks for anyone else. as long
as there is no tried-and-tested middleware that does
color conversations, decodes mjpeg streams and all
those things, it's up to the developers of
v4l2-applications to reinvent those wheels for every
usb camera and every colour space out there. that's
plain - inefficient. gstreamer might be able to do
exactly this one day, hopefully. the loopback device
for v4l looked promising as well, but is not
maintained anymore.

> The quickcam 4000 pro stops at 15 fps for that
> resolution. At 320x240 it 
> goes up to 30 fps but limited to increments of 5
> fps.
blimey. i kind of came to terms with using a dv cam
already and live with the 50% performance penalty ... 

with kind regards,
thoralf.


		
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