[FFmpeg-devel] [PATCH] matroskadec, matroskadec, srtenc: Read/Write duration for subtitles. (v2)

[Hendrik Leppkes]

On Sun, Aug 5, 2012 at 6:17 PM, Philip Langdale <philipl at overt.org> wrote:

> > There are files with such a timebase. It may not be common, but they
> > do exist and they are valid according to the MKV spec.
> > So, yes, it is needed for such files, until such a day when the real
> > duration is converted to int64 (if ever)
>
> Ugh. This is such a mess. If we really can't move mkv to use duration,
> then we've got to go in the other direction.
>
> Maybe:
>
> #define SUBTITLE_DURATION convergence_duration
>
> and use pkg->SUBTITLE_DURATION for now and switch the
> define when we can finally break compatibility.
>
>
As an alternative, could detect such timebases and scale them by factor
1000 to microseconds (1/1000000), with a slight loss of precision, of
course.