ff_v4l2_format_avfmt_to_v4l2  482 libavcodec/v4l2_context.c     v4l2_fmt = ff_v4l2_format_avfmt_to_v4l2(pixfmt);
ff_v4l2_format_avfmt_to_v4l2   32 libavcodec/v4l2_fmt.h uint32_t ff_v4l2_format_avfmt_to_v4l2(enum AVPixelFormat avfmt);