This matches the matroska defintion of stereo_mode, with no metadata written if no info exist in sei
8710a63 h264: add frame packing as stereo_mode frame metadata
libavcodec/h264.c | 3 ++
libavcodec/h264.h | 36 ++++++++++++++++++-
libavcodec/h264_parser.c | 1 +
libavcodec/h264_sei.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 125 insertions(+), 1 deletion(-)