[FFmpeg-user] retain timecode stream when transcoding v210 to FFV1/MKV

[Gema Grueso]

Hi everyone,
I've been reviewing IASA TC06 about that subject and I recall something
about transcoding legacy timecodes to other kind of data and include it in
the mkv wrapper, but not completely sure. You can check it here
https://www.iasa-web.org/tc06/guidelines-preservation-video-recordings
Hope it helps!

El sáb, 3 may 2025, 12:58, BloodMan <bloodman at gmail.com> escribió:

> 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.
>
> 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.
>
>
>
>
> W dniu 2025-05-03 o 12:01, Christian Sievers via ffmpeg-user pisze:
> > Thanks!
> >
> > @BloodMan Yes I had seen that hint.
> >
> > @John Curtis
> >
> > Both commands throw up the same error message:
> >
> > [matroska @ 0x7fdaabf0a2c0] Only audio, video, and subtitles are
> supported for Matroska.
> > [out#0/matroska @ 0x7fdaabf07340] Could not write header (incorrect
> codec parameters ?): Invalid argument
> > [af#0:1 @ 0x7fdaabf0fec0] Error sending frames to consumers: Invalid
> argument
> > [af#0:1 @ 0x7fdaabf0fec0] Task finished with error code: -22 (Invalid
> argument)
> > [af#0:1 @ 0x7fdaabf0fec0] Terminating thread with return code -22
> (Invalid argument)
> > [out#0/matroska @ 0x7fdaabf07340] Nothing was written into output file,
> because at least one of its streams received no packets.
> >
> > I can’t post a link to an example file here because I don’t have the
> rights to do that, and I can’t make an excerpt that still has the timecode
> track … it’s a catch 22 :)
>
>
> --
> Pozdrawiam,
> bloodman at gmail.com
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