[gstreamer-bugs] [Bug 635304] New: [opencv] fix caps issues and extend supported caps for some elements [PATCH]

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=635304
  GStreamer | gst-plugins-bad | unspecified

           Summary: [opencv] fix caps issues and extend supported caps for
                    some elements [PATCH]
    Classification: Desktop
           Product: GStreamer
           Version: unspecified
        OS/Version: Windows
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: josh at joshdoe.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


Created an attachment (id=174887)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=174887)
Patch to fix and extend caps for opencv elements

Some elements had vague caps, such as "video/x-raw-rgb", which caused problems
at least with textwrite. For other elements, the underlying OpenCV functions
support more than just one image type, so I increased the number of supported
caps.

I created a utility function "gst_opencv_caps_from_cv_image_type", so each
element creates caps directly from OpenCV image types, such as CV_8UC1 for
8-bit grayscale. This function uses gstvideo to create uniform caps.

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