I try to accquire the video frame of camera wih QT timer. But Grab() can not work any more after one while. I can not figure out what is wrong .
My program timer setting is 200msec based on 5 frame/s. the source code
when grab() is stoped, there is have some information:
[h264 @ 0000024d2258d580] left block unavailable for requested intra mode
[h264 @ 0000024d2258d580] error while decoding MB 0 23, bytestream 202
[h264 @ 0000024d22579a80] top block unavailable for requested intra mode
[h264 @ 0000024d22579a80] error while decoding MB 77 0, bytestream 1634
[h264 @ 0000024d250ba840] error while decoding MB 52 22, bytestream -13
please give me some advise,thanks.