[Bug 749122] New: Vp8enc target bitrate is not working as expected

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=749122

            Bug ID: 749122
           Summary: Vp8enc target bitrate is not working as expected
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: santoscadenas at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

When using this pipeline:

gst-launch-1.0 v4l2src num-buffers=300 ! vp8enc resize-allowed=true
target-bitrate=100000 deadline=1000000 threads=1 cpu-used=16 end-usage=cbr !
video/x-vp8 ! webmmux ! filesink location=/tmp/test_1.4.webm

Output bitrate of output file is about the a half (or the third part sometimes)
of the target-bitrate, but using the same pipeline in with gstreamer 1.4.5 the
bitrate is closer to the target bitrate.

* With gstreamer 1.5 I get a file of 274772
* With gstreamer 1.4.5 I get a file of 411905

The duration of the file is the same in both cases 33.3 seconds

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