[Bug 758344] New: avdec_h264 generates video frames with height that doesn't match the height in the caps

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=758344

            Bug ID: 758344
           Summary: avdec_h264 generates video frames with height that
                    doesn't match the height in the caps
    Classification: Platform
           Product: GStreamer
           Version: 1.6.1
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-libav
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: m.olbrich at pengutronix.de
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 315893
  --> https://bugzilla.gnome.org/attachment.cgi?id=315893&action=edit
test file to reproduce the issue

With the attached file avdec_h264 negotiates height=1080 and then sends a
buffer with height=1088 in the video meta.
vaapisink tries to copy the frame into a buffer from it's own buffer pool and
fails with:
** (gst-launch-1.0:12515): CRITICAL **: gst_video_frame_copy: assertion
'dinfo->width == sinfo->width && dinfo->height == sinfo->height' failed

Tested with:
gst-launch-1.0 filesrc location=test.mov ! qtdemux ! avdec_h264 ! vaapisink

I'm not sure which side is wrong here. The real height is 1080 but the buffer
is 1088 (rounded to the next full macro block). How should a decoder handle
this?

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