[FFmpeg-devel] subtitle filter

[Iliya Bunov]

It is still not working.
With  -itsoffset 00:10:57 subs taken from 0,0:10:47.78,0:10:51.23.



2014-04-14 23:03 GMT+04:00 Calvin Walton <calvin.walton at kepstin.ca>:

> On Sun, 2014-04-13 at 00:39 +0400, Iliya Bunov wrote:
> > It is impossible to make a screenshot with hardsubs.
> > ffmpeg -ss 00:10:57 -t 1 -i m.mkv -vf "ass=m.ass" -f mjpeg image01.png
> > Subtitles always start from the beginning (00:00 not 00:10:57).
> >
> > Adding "ss" option can solve this problem.
> > ffmpeg -ss 00:10:57 -t 1 -i m.mkv -vf "ass=m.ass:ss='10\:57'" -f mjpeg
> > image01.png
>
> Setting the timestamp offset on the video input should do the trick here
> with none of the other side-effects of using -copyts; something like:
>
> ffmpeg -ss 00:10:57 -itsoffset 00:10:57 -t 1 -i m.mkv -vf  ass=m.ass -f
> mjpeg image01.png
>
> (If you're encoding to a new video stream rather than a single snapshot
> and want the output timestamps to start at 0, you would have to add a
> setpts filter after the ass filter)
>
> --
> Calvin Walton <calvin.walton at kepstin.ca>
>
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