[Bug 770474] Vaapisink plugin does not play 1920 x 1080 video file properly

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=770474

--- Comment #2 from Gautham Kantharaju <gautham.kantharaju at gmail.com> ---
Did more analysis, there found the below issues,

1) When h264 related video is played, most of the time container and decoder
(vaapidecode) retrieves "correct" size "1920 x 1080" but vaapi h264parser SPS
width x height is "1920 x 1088" because of this notify_codec_state_changed() is
called, vaapidecode sink pad caps are updated, thus calling
gstvappi_set_caps(), second time.

2) Video size retrieved in set_caps is 1920 x 1088, out rectangle size
calculated is "1786 x 1080".

3) While you are testing, did you set below vaapisink plugin property,
fullscreen=true and force-aspect-ratio=false? if set then size is preserved.

4) Even, I used the same video file used by you for testing.

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