Please describe the problem:
When executing sample pipeline from multipartdemux documentation (http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-multipartdemux.html),
the ximagesink element doesn't display enything.



Steps to reproduce:
1)
Create /tmp/test.multipart file using the following command (sample pipeline from multipartmux documentation with "num-buffers=500" added):
$ gst-launch videotestsrc num-buffers=500 ! video/x-raw-yuv, framerate=\(fraction\)5/1 ! jpegenc ! multipartmux ! filesink location=/tmp/test.multipart

2)
Execute the following command (from multipartdemux documentation):
$ gst-launch filesrc location=/tmp/test.multipart ! multipartdemux ! jpegdec ! video/x-raw-yuv, framerate=\(fraction\)5/1 ! ffmpegcolorspace ! ximagesink

There's no error reported, but the commad doesn't open any window with ximagesink output.

3)
Execute the same command without setting framerate:
$ gst-launch filesrc location=/tmp/test.multipart ! multipartdemux ! jpegdec ! ffmpegcolorspace ! ximagesink

This time ximagesink works as expected.


Actual results:


Expected results:


Does this happen every time?


Other information:
This is GStreamer 0.10.9 from Garnome:
$ gst-launch --version
gst-launch-0.10 version 0.10.9
GStreamer 0.10.9
Unknown package origin