[Bug 766978] mpeg-2 decoding broken

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=766978

Scott D Phillips <scott.d.phillips at intel.com> changed:

           What    |Removed                     |Added
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                 CC|                            |scott.d.phillips at intel.com

--- Comment #15 from Scott D Phillips <scott.d.phillips at intel.com> ---
(In reply to Tim-Philipp Müller from comment #14)
> I also noticed that the subtitles are stretched horizontally with vaapi
> compared to software rendering, perhaps that's related?
> 
> The other clip I tested was MPEG-2 after all actually, not H264, but without
> subs.

The vaapidecodebin within the decodebin scales the video for 1/1 p-a-r and
deinterlaces the video. I think the scaling is interfering with the later
subtitle overlay in the playbin. I'm not yet familiar enough with dvb subtitles
to know what the right thing to do is, but I'll look into it.

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