[gstreamer-bugs] [Bug 609274] [regression] [decodebin2] massive slowness in importing clips in pitivi

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=609274
  GStreamer | don't know | 0.10.25

Edward Hervey <bilboed> changed:

           What    |Removed                     |Added
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             Status|UNCONFIRMED                 |NEW
                 CC|                            |bilboed at gmail.com
     Ever Confirmed|0                           |1

--- Comment #4 from Edward Hervey <bilboed at gmail.com> 2010-02-09 10:25:02 UTC ---
A quick look at what time is spent in discovering a 10s DV-in-AVI file (i.e.
720x576 DV which is fast to decode, and an AVI container which is fast to
parse) gives me the following:

Total discovery time : 845ms
 * time spent between discovery start and avidemux finishes parsing file : 27ms
 * time spent for encoding a png file : 26ms
 * time spent between discovery start and pngenc pushes out encoded buffer :
271ms
 * time spent between pngenc pushes out encoded buffer and avidemux stops its
streaming thread : 571ms (!?!?!??!?!)

The problem therefore lies between the moment pngenc has finished encoding the
buffer and the moment avidemux stops streaming.

My guess at this point lies in multiqueue taking aeons to forward the
GST_FLOW_UNEXPECTED back to avidemux. Will investigate this a bit more in a
couple of hours.

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