1V4L2_BUF_TYPE_VIDEO_CAPTURE
2V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
3V4L2_BUF_TYPE_VIDEO_OUTPUT
4V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE
5V4L2_BUF_TYPE_VIDEO_OVERLAY
6V4L2_BUF_TYPE_VBI_CAPTURE
7V4L2_BUF_TYPE_VBI_OUTPUT
8V4L2_BUF_TYPE_SLICED_VBI_CAPTURE
9V4L2_BUF_TYPE_SLICED_VBI_OUTPUT
10V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY
11