[Bug 735804] smpte: Pipeline throws "Internal dataflow error"

Mon Sep 1 22:05:09 PDT 2014

https://bugzilla.gnome.org/show_bug.cgi?id=735804
  GStreamer | gst-plugins-good | git

--- Comment #3 from RaviKiran <ravi.kiran at samsung.com> 2014-09-02 05:05:04 UTC ---
Thanks for the review. Here is my understanding -

>>why caps negotiation fails
caps nego failed because videotestsrc produced caps including properties
"pixel-aspect-ratio" and "interlace-mode"
however in smpte we create hard-wired caps without those 2 properties. When I
added those properties, pipeline worked.
Is it a good idea to modify the pad template and implement query function to
handle QUERY_CAPS ?

>>Why not just forward the caps directly from the setcaps function by calling gst_pad_set_caps() from there?
When we receive caps event, stream-start event isn't initated yet. So, that
would cause sticky-event misordering.

>> Also what do you do if both sinkpads have different caps that are nonetheless compatible for the smpte element?
SMPTE documentation says - smpte can accept I420 video streams with the *same*
width, height and framerate. 

Please let me know if got something wrong.

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