message: Fix missing FFmpeg include needed for av_get_pix_fmt_name
diff: @@ -114,6 +114,8 @@ extern "C" {
  #include <libavcodec/bsf.h>
  #endif
  +#include <libavutil/pixdesc.h>
  +
  // https://github.com/FFmpeg/FFmpeg/blob/b6af56c034759b81985f8ea094e41cbd5f7fecfb/doc/APIchanges#L208-L210
  #if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(59, 0, 100)
  # define CV_FFMPEG_FMT_CONST const
  