用的是ov的摄像头,在用xawtv打开时,可以看到捕获的画面还算流畅.

自己改编了一个video4linux的程序,但是效率很低

从ioctl (dev, VIDIOCMCAPTURE, &vid_mmap)

到ioctl (dev, VIDIOCSYNC, &vid_mmap.frame)

程序运行一共用了0.25s左右-use the ov cameras, on the xawtv opened, can see the screen capture fairly fluent. their adaptation of a video4linux procedures, However, the low efficiency from the ioctl (dev, VIDIOCMCAPTURE.