Jeff Anderson wrote: >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? > As Dmitri said, that is the maximum (uncompressed) frame rate (except that in this case, there are 1.5 bytes per YUV420 pixel, so you will get slightly less than 2 FPS)
>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). > That camera is capable of compression, which will yield 10-15 FPS in exchange for a moderate loss of quality. To use it, you need a more recent ov511 driver than the one included with the 2.4 kernels, and the ov511_decomp module. See http://alpha.dyndns.org/ov511/ for more information. For the best quality, you might want to buy a decent CCD-based camera with composite output, and an ov511-based USB TV capture box (eg. Lifeview USB Capview). The only drawback is that the video will be interlaced at 640x480, but otherwise the quality is much better than with the cheap CMOS sensor in the ct6840. As Dmitri mentioned, a firewire camera may be the best choice in your case. -- Mark McClelland [EMAIL PROTECTED] _______________________________________________ Video4linux-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/video4linux-list
