[gstreamer-bugs] [Bug 504760] New: Videoscale element keeps renegotiating endlessly

[GStreamer (bugzilla.gnome.org)]

If you have any questions why you received this email, please see the text at
the end of this email. Replies to this email are NOT read, please see the text
at the end of this email. You can add comments to this bug at:
  http://bugzilla.gnome.org/show_bug.cgi?id=504760

  GStreamer | gstreamer (core) | Ver: HEAD CVS
           Summary: Videoscale element keeps renegotiating endlessly
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: vortex at wolpzone.de
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


Introduction:

I was developing a gstreamer-enabled player application in python using the
gst-python bindings when I discovered that my application does not work with
video sinks that lack hardware scaling and hence require a videoscale element.

I did add a videoscale element to the pipeline, but it's not doing it's job
correctly: as soon as you resize the video window it will start to renegotiate
endlessly and does not scale at all anymore.

I have extracted the core player part from my application so you can reproduce
this bug.

Steps to reproduce:

1. download my code from http://wolpzone.de/dir/vortex/azure_minimal.tar.gz and
extract the archive

2. run wrapper.py with "/some/file" as argument

3. resize the video window

4. watch what happens

Expected result:

The Video is resized nicely along with the window.

Actual result:

The Video is not resized at all. Framerate drops to 0 and CPU load raises to
100%.

Additional information:

The player code is contained in azure_core.py. Take a look at the Videobin
class there, it contains the videoscale element and video sink.


-- 
See http://bugzilla.gnome.org/page.cgi?id=email.html for more info about why you received
this email, why you can't respond via email, how to stop receiving
emails (or reduce the number you receive), and how to contact someone
if you are having problems with the system.

You can add comments to this bug at http://bugzilla.gnome.org/show_bug.cgi?id=504760.