[Bug 732351] Bogus bottom line when decoding using xvimagesink

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=732351
  GStreamer | gst-libav | git

Vincent Penquerc'h <vincent.penquerch> changed:

           What    |Removed                     |Added
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                 CC|                            |vincent.penquerch at collabora
                   |                            |.co.uk

--- Comment #1 from Vincent Penquerc'h <vincent.penquerch at collabora.co.uk> 2014-07-02 13:06:50 UTC ---
It seems to be a x264enc thing:

gst-launch-1.0 videotestsrc pattern=6 ! "video/x-raw, format=(string)I420,
width=(int)16, height=(int)16,framerate=(fraction)1/1" ! x264enc ! avdec_h264 !
xvimagesink

I see a grey square with colored right/bottom lines.

Without the enc/dec, I see a filled blue square.

With gst-launch-1.0 videotestsrc pattern=6 num-buffers=1000 ! "video/x-raw,
format=(string)I420, width=(int)16, height=(int)16,framerate=(fraction)1/1" !
x264enc ! qtmux ! filesink location=/tmp/test-16x16.mov

the file plays back as grey with both ffplay and gst (pattern=6 is solid blue).

Not sure why this does not happen with ximagesink, however. It is unlikely to
be different clipping since it's 16x16.

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