[gstreamer-bugs] [Bug 572275] New: Make theoraenc expose the new "Speed level" property

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: git
           Summary: Make theoraenc expose the new "Speed level" property
           Product: GStreamer
           Version: git
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: bens at alum.mit.edu
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unversioned Enhancement
   GNOME milestone: Unspecified


The attached patch exposes the Speed Level property, new in the Theora 1.0
series, in theoraenc as "speed-level".  This property, if set to a value
of 2, accelerates encoding by disabling motion vectors entirely.

The attached patch is tested to enable control of the speed-level property
in theoraenc.  This patch does not break backwards compatibility, nor does
it change default behaviors.  (The speed-level knob will simply have no
effect on old versions of libtheora.)

My motivation, which is entirely irrelevant, is to encode video in real
time on the XO, especially for video chat.  In my completely arbitrary
test, I observed an 18% speedup at fixed quality, at a cost of 25%
increased bitrate.  (Frankly, I was hoping for a much larger speedup, but
never mind.)


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