[Bug 746087] New: GstVideoCropMeta implementation is inconsistent

GStreamer (GNOME Bugzilla) bugzilla at gnome.org
Thu Mar 12 05:14:47 PDT 2015


https://bugzilla.gnome.org/show_bug.cgi?id=746087

            Bug ID: 746087
           Summary: GstVideoCropMeta implementation is inconsistent
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: blocker
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: thaytan at noraisin.net
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: mduponchelle1 at gmail.com,
                    nicolas.dufresne at collabora.co.uk, slomo at coaxion.net,
                    t.i.m at zen.co.uk, thaytan at noraisin.net,
                    vincent.penquerch at collabora.co.uk
        Depends on: 741030
     GNOME version: ---

Currently GstVideoCropMeta implementation is problematic - caps width/height
values and GstVideoMeta settings are a bit jumbled, and things need fixing and
documenting across the board.

>From slomo in bug #74010, it should work like this:

- CAPS event contains the display width/height (otherwise applications will
become unhappy, GstDiscoverer reports wrong information, etc)
- caps inside the ALLOCATION query contain the memory width/height
- GstVideoMeta contains the memory width/height
- GstVideoCropMeta contains how much should be cropped relative to the values
inside the video meta and the ALLOCATION query caps

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