[Bug 724899] New: v4l2src does not set interlaced flag on buffers

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=724899
  GStreamer | gst-plugins-good | 1.2.2

           Summary: v4l2src does not set interlaced flag on buffers
    Classification: Platform
           Product: GStreamer
           Version: 1.2.2
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: simon.farnsworth at onelan.co.uk
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


v4l2src does not set GST_VIDEO_BUFFER_FLAG_INTERLACED on the buffers it pushes
upstream; gstreamer-vaapi relies on this flag to determine whether to
deinterlace the buffer or not.

The attached patch sets GST_VIDEO_BUFFER_FLAG_INTERLACED whenever we're setting
or unsetting GST_VIDEO_BUFFER_FLAG_TFF.

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