Le 03/05/2025 à 12:57, BloodMan a écrit :
Hello Christian,
OK. right.
But in general you have answer in error description: " Only audio,
video, and subtitles are supported for Matroska." This means that
timecodes was not supported by matroska.
Tiny correction: not (yet) supported by FFmpeg for Matroska
In RFC you have confirmation: https://datatracker.ietf.org/doc/rfc9559/
"11. Timestamps - Historically, timestamps in Matroska were
mistakenly called timecodes."
So, or at least that's how I understand it, Matroska doesn't have
timecode support, only timestamp support - which is not the same and
apparently "doesn't convert" - or at least that's not the role of the
encoder.
It is relatively new but there is now a support timecodes in Matroska:
https://github.com/ietf-wg-cellar/matroska-specification/blob/master/cellar-codec/block_additional_mappings/smpte-st12-1-timecode.md
We are working on implementing that, we plan to send a patch to
ffmpeg-devel when it is ready.
Jérôme
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