[FFmpeg-user] A query on FFmpeg's s12m timecode in H264 NVENC

[Dennis Mungai]

Hello there,

In FFmpeg's HEVC & AV1 encoder wrappers, the private codec option -s12m_tc
, documented as  "Use timecode (if available)", is present, but unmapped in
the H.264 encode wrapper.

This, however, should also be present in h264_nvenc, as indicated in
ffnvcodec's
https://github.com/FFmpeg/nv-codec-headers/blob/master/include/ffnvcodec/nvEncodeAPI.h#L2432

Is there a reason why this timecode SEI is omitted in h264_nvenc?