[gstreamer-bugs] [Bug 609792] [pitivi] [transitions] black frame flashing in rendered files when using transitions

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=609792
  GStreamer | gst-plugins-good | 0.10.26

Sebastian Dröge <slomo> changed:

           What    |Removed                     |Added
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                 CC|                            |brandon_lewis at alum.berkeley
                   |                            |.edu

--- Comment #2 from Sebastian Dröge <slomo at circular-chaos.org> 2010-02-19 05:17:18 UTC ---
Ok, so apparently pitivi plugs a videotestsrc here, which outputs black frames.
This is causing the black frames because  at the time when the video stream
goes EOS the first time there's still some duration left of the black stream,
which then gets a black frame rendered.

Unfortunately this black stream is necessary to force videomixer to a constant
framerate if using inputs with multiple framerates (as long as the black stream
has the highest framerate). Was this the reason why you have it in pitivi,
Brandon?

Anyway, the black stream should be removed from pitivi in any case. If problems
arise because the downstream framerate changes the solution would be, to let
videomixer choose the downstream framerate instead of always using the highest
input framerate. This should be quite easy to implement.

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