[Bug 735423] videodecoder: 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

--- Comment #12 from kevin <kevinbing.song at gmail.com> 2014-08-29 03:14:51 UTC ---
Thank you again.

I have test above method and it works. So the issue can be resolved without my
patch.

I found one thing, video sink will deactive preview buffer pool and free all
video buffer memory even if the video tracks has same caps. It seems must do it
as video decoder maybe change video buffer pool configure, so video buffer pool
need in inactive state. Do GStreamer has any method to avoid video sink
reallocate memory when caps is same?

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