1V4L2_BUF_FLAG_MAPPED 2V4L2_BUF_FLAG_QUEUED 3V4L2_BUF_FLAG_DONE 4V4L2_BUF_FLAG_KEYFRAME 5V4L2_BUF_FLAG_PFRAME 6V4L2_BUF_FLAG_BFRAME 7V4L2_BUF_FLAG_TIMECODE 8V4L2_BUF_FLAG_INPUT 9V4L2_BUF_FLAG_PREPARED 10V4L2_BUF_FLAG_NO_CACHE_INVALIDATE 11V4L2_BUF_FLAG_NO_CACHE_CLEAN 12V4L2_BUF_FLAG_TIMESTAMP_MASK 13V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN 14V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC 15V4L2_BUF_FLAG_TIMESTAMP_COPY 16V4L2_BUF_FLAG_TSTAMP_SRC_MASK 17V4L2_BUF_FLAG_TSTAMP_SRC_EOF 18V4L2_BUF_FLAG_TSTAMP_SRC_SOE 19V4L2_BUF_FLAG_LAST 20