Andrew Wilson <a_wilson@xxxxxxx> writes: > Hello, > I'm trying to grab a 640x480 BW frame as fast as possible, it > currently takes roughly 100milliseconds per grab. The live video > feed straight to the monitor runs smoothly at 60fps though, shouldn't > a frame grab be 17 milliseconds? Is there a way to boost the frame > grab rate? I only need to grab a couple of frames, its just that I > want the grab to occur very quickly. 17 milliseconds is one field, makes 33 ms capture time for a full 640x480 frame composed by interleaving two fields. Should give you 66 ms worst-case and 50 ms average latency (+ syscall overhead) until a frame is returned ... 100 ms is alot. What driver you are talking about? Gerd -- Michael Moore for president!
