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[Rocko <rockorequin@xxxxxxxxxxx>]

The Natty plugins are the files in the /usr/lib/gstreamer-0.10 directory
in a Natty installation, while the Oneiric plugins are the files in the
/usr/lib/gstreamer-0.10 directory. A diff isn't much help, because they
are binaries of different versions of gstreamer.

I unfortunately also don't have the Natty version of ~/.gstreamer-0.10,
because I deleted it and it got regenerated. I imagine it would be
possible to make one easily enough from a live installation disk,
though.

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https://bugs.launchpad.net/bugs/856988

Title:
  totem cannot play quicktime file after upgrade to oneiric

Status in “gstreamer0.10” package in Ubuntu:
  Confirmed

Bug description:
  Totem can't play quicktime files on a PC upgraded from natty to
  oneiric. On a VM with oneiric installed from scratch, however, totem
  can play the same files, so it seems to be a configuration error. Both
  the PC and VM run 64 bit oneiric, have the same kernel version, and
  both have ia32 libs installed

  A sample file that fails to play can be found in comment 5 of bug
  #851481.

  On the PC that fails to play the files, totem prompts to install the
  plugin for 'Quicktime demuxer' but then gnome-codec-install can't find
  a suitable plugin.

  On the VM that *can* play the files, totem prompted to install the
  same plugin and gnome-codec-install found and installed
  gstreamer0.10-ffmpeg and gstreamer0.10-plugins-bad. (These are both
  already installed on the PC that cannot play the files.)

  The output from gst-launch-0.10 uridecodebin=file:///<file in
  question> is:

  Setting pipeline to PAUSED ...
  Pipeline is PREROLLING ...
  WARNING: from element /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0: No decoder available for type 'video/quicktime, variant=(string)iso'.
  Additional debug info:
  gsturidecodebin.c(867): unknown_type_cb (): /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0
  ERROR: from element /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20: Your GStreamer installation is missing a plug-in.
  Additional debug info:
  gstdecodebin2.c(3233): gst_decode_bin_expose (): /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20:
  no suitable plugins found
  ERROR: pipeline doesn't want to preroll.
  Setting pipeline to NULL ...
  Freeing pipeline ...

  I have tried reinstalling all the installed gstreamer packages as well
  totem, but to no avail.

  How does gstreamer match plugins against the video type, eg
  'video/quicktime, variant=(string)iso'?

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: gstreamer-tools 0.10.35-1
  Uname: Linux 3.1.0-rc7-git-20110923.0546 x86_64
  ApportVersion: 1.23-0ubuntu1
  Architecture: amd64
  Date: Fri Sep 23 10:13:28 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110330)
  SourcePackage: gstreamer0.10
  UpgradeStatus: Upgraded to oneiric on 2011-09-22 (0 days ago)

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