[Bug 687625] Subtitles (ssa/vobsub) not showing on matroska video with playback-test

Mon Nov 24 05:03:06 PST 2014

https://bugzilla.gnome.org/show_bug.cgi?id=687625
  GStreamer | gst-plugins-base | 1.0.2

--- Comment #5 from Arnaud Vrac <rawoul at gmail.com> 2014-11-24 13:03:03 UTC ---
In master it does not work, no subtitle is shown. I'm not sure what's wrong
with dvdspu here.

The subtitles are shown with my dvdspu branch that uses
GstVideoOverlayComposition (see Bug #685282). Unfortunately the subtitles
bottom line is clipped: the original dvd video frame had black borders, and
originally part of the subtitles was displayed the black borders region. The
black borders were cropped during encoding.

I'm not sure how to handle this case, I think mplayer just scaled the SPU
overlay to match the video frame. We could also move SPU objects to fit them in
the video frame, but that's harder to do.

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