[Bug 696692] Change rate on streamable files

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=696692
  GStreamer | gstreamer (core) | git

--- Comment #5 from Nicola <lists at svrinformatica.it> 2013-03-27 21:44:57 UTC ---
this partially work in qtdemux with something like this:

gst_element_seek (pipe, rate, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
          GST_SEEK_TYPE_SET, pos, GST_SEEK_TYPE_NONE,
          GST_CLOCK_TIME_NONE)

however a new http request is done, 

the expected behaviour should be that something like this:

gst_element_seek (pipe, rate, GST_FORMAT_TIME, GST_SEEK_FLAG_NONE,
          GST_SEEK_TYPE_NONE, pos, GST_SEEK_TYPE_NONE,
          GST_CLOCK_TIME_NONE)

change only the rate without doing any new network request, this does not work
at all in both qtdemux and matroskademux

the pipeline used is:

souphttpsrc ! matroska/qtdemux ! avdec_h264 ! xvimagesink

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