Can you put your camera in YUV mode? This can be 1/2 amount of data per frame as RGB, and eliminates the RGB-to-YUV conversion required before compression (which is very cpu intensive for fast frame rates). On Monday 28 January 2002 05:46 pm, you wrote: > Quoting Jeff Anderson <stonejanderson@xxxxxxxxx>: > > I am working on a project which requires fast image > > capture speed for color 640x480 level. But I could > > only get around 1.5 fps. Is it possible to increase > > the fps in the software domain? > > > > We intend to use limited hardware (without any TV > > card.. ) because finally the project will be moved > > to laptops. DOes anybody get more fps using any > > Video Cameras. > > > > I used Creative labs ct6840 USB WebCam. And the test > > was run on a dual CPU (800M) 512 MB mem Linux box > > (kernel 2.4.9-12smp). > > USB, by design, is not capable of what you need. It can transfer up to > 12Mbps per controller, if you count overhead then it wil be something like > 8Mbps or 1MBps. Each 640x480 frame probably needs about 3 bytes per pixel, > so total is 640x480x3 = 921.6 KB, yielding 1 FPS. It all computes. > > For your project you need a FireWire camera. But check with FireWire > people first and get their recommendation. > > Dmitri ---------------------------------------- Content-Type: application/pgp-signature; charset="us-ascii"; name="Attachment: 1" Content-Transfer-Encoding: 7bit Content-Description: ----------------------------------------
