Hi, I can only capture 8-10 fps regardless of image size using the bttv drivers and the v4l interface. The type of card I have is an Osprey 100. The device driver does not support read captures, so I have to use mmap. Here is the gist of my code: fd = open(/dev/video0, O_RDONLY); video_picture.depth = 24; video_picture.format = VIDEO_PALETTE_RGB24 ioctl (fd, VIDIOCGPICT, *video_picture); video_window.width = 176; video_window.height = 144; ioctl (fd, VIDIOCSWIN, *video_window); //MMAP will only grant me enough memory for 2 frames //no matter what my arguments are unsigned char* data = mmap(0, 152064,PROT_READ,MAP_SHARED,fd,0); //Capture Loop ioctl(fd,VIDIOCMCAPTURE, *video_mmap); ioctl(fd,VIDIOCSYNC, &ONE); <memcpy buffer 1> ioctl(fd,VIDIOCMCAPTURE, *video_mmap); ioctl(fd,VIDIOCSYNC, &TWO); <memcpy buffer 2> After each second I check the number of frames I have been able to copy. Its always 8-10. If anyone sees a problem, please let me know. Thanks. -kali
