Comment 19 for bug 508123

I don´t have Medibuntu repository, but I do have the ubuntu-restricted-extras from the multiverse repository. Is Medibuntu necessary? I also checked the dependencies and ffmpeg was missing, so I installed that, but that didn´t help. Also, I applied the patch, but again, no luck.
The codecs do not show up in the AV Formats window under preferences (see screenshot), but as far as I know they are installed.

Thanks for your help!