[FFmpeg-devel] [PATCH] WebVTT demuxer - save cue id and settings as side data

Matthew Heaney matthewjheaney at google.com
Sat Jun 1 01:32:18 CEST 2013


OK, thanks for the tips.  I determined that there was indeed a small
problem: the webvtt demuxer must specify the AVFMT_FLAG_KEEP_SIDE_DATA flag
in order to prevent the side data from being merged into the packet data.
 This error didn't show up when copying a vtt input file to a webm output
file text track, but it did manifest when converting a vtt to an ass.


On Fri, May 31, 2013 at 12:41 PM, Clément Bœsch <ubitux at gmail.com> wrote:

> On Fri, May 31, 2013 at 12:32:20PM -0700, Matthew Heaney wrote:
> > On Fri, May 31, 2013 at 11:18 AM, Clément Bœsch <ubitux at gmail.com>
> wrote:
> > >
> > > If you have a md5 mismatch,
> > >
> > >   make fate-sub-webvtt V=1
> >
> > This still fails.
> >
>
> Sure, the idea is just to get an idea of what's failing (by showing the
> command run by the test).
>
> >
> > > Replace "md5:" with "ref.ass", then retry the same command with a
> > > different output after your changes and compare the two outputs.
> >
> > I have only run the fate test suite, but without understanding its
> > architecture, so I'm not quite following this advice.  Should I be
> > modifying a script or some such, or merely executing a different
> > command line?
> >
>
> I was suggesting a modification of the command shown with the debug.
>
> FATE depends on sample you sync regularly (see
> http://ffmpeg.org/fate.html#Using-FATE-from-your-FFmpeg-source-directory)
>
> Then you have a bunch of tests, mainly defined in tests/fate directory.
>
> --
> Clément B.
>
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>


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