[PD] Re: [GEM-dev] Re: pix_video and dv1394 capture on Edgy

[Ivica Ico Bukvic]

Thanks for the info. However, ADVC-100 that I use is a firewire A/V device
so the default behavior is 30fps at 720x480 (NTSC) with the only bottleneck
being the quality of the camcorder (which in this case is still better than
a webcam). But all this is moot as Gem worked just fine a month ago when I
was working on Hoary 5.04 and now on 6.10 it doesn't (either the extended
nightly builds or my own build). And this worries me since my project
depends upon transportability/transparency which is currently sorely missing
in this setup...

Best wishes,

Ico

On 12/28/06, Mathieu Bouchard <matju at artengine.ca> wrote:
>
> On Thu, 28 Dec 2006, Ivica Ico Bukvic wrote:
>
> > Thanks for the advice but I am hoping to avoid webcam due to inherent
> > quality/fps decrease.
>
> USB2 is 40 times faster than USB1: at 400 mbps, in 720x576, full color 24
> bits per pixel, cameras could do 40 fps... but typically they don't, they
> use half the data rate (decimation of chroma columns, as in most broadcast
> video) and have a cap at 30 fps because anyway the motion is already
> blurry enough at 30 fps.
>
> You may also need a special program to unlock the framerate of the camera.
> For Philips cameras (most of the modern Logitech/Labtec) the setpwc
> program will allow you to get away from the default framerate of 10 fps.
>
>   _ _ __ ___ _____ ________ _____________ _____________________ ...
> | Mathieu Bouchard - tél:+1.514.383.3801 - http://artengine.ca/matju
> | Freelance Digital Arts Engineer, Montréal QC Canada
>
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