[Bug 735423] New: [gsttvideodecoderbase] Haven't set caps to downstream when select another video track.

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=735423
  GStreamer | gst-plugins-base | 1.2.3

           Summary: [gsttvideodecoderbase] Haven't set caps to downstream
                    when select another video track.
    Classification: Platform
           Product: GStreamer
           Version: 1.2.3
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: kevinbing.song at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=284469)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=284469)
patch to fix the issue.

Video decoder base haven't set caps to down-streamer plugin when video track
selection. But video sink should know the new pad caps link with video sink
when video track selection. And video sink will prepare new buffer pool for new
pad caps.

Video decoder base should set caps even if caps is same with previews as
video sink should know the new caps and prepare new buffer pool when
select another video track.

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