Ошибка импорта Rhythmbox в 12.04

Rhythmbox не может установить плагин MPEG-4, когда я импортирую в него файлы mp4. Он идентифицирует плагин (Gstreamer), но не может установить его, ссылаясь на ошибки зависимостей пакета, как показано ниже:

 The following packages have unmet dependencies:

gstreamer0.10-ffmpeg: Depends: libavcodec-extra-53 (>= 4:0.7.3-1) but 4:0.8.1ubuntu1 is to be installed
                      Depends: libavformat-extra-53 (>= 4:0.7.3-1) but 4:0.8.1ubuntu1 is to be installed
                      Depends: libavutil-extra-51 (>= 4:0.7.3-1) but 4:0.8.1ubuntu1 is to be installed
                      Depends: libc6 (>= 2.7) but 2.15-0ubuntu10 is to be installed
                      Depends: libglib2.0-0 (>= 2.31.2) but 2.32.1-0ubuntu2 is to be installed
                      Depends: libgstreamer-plugins-base0.10-0 (>= 0.10.31) but 0.10.36-1 is to be installed
                      Depends: libgstreamer0.10-0 (>= 0.10.31) but 0.10.36-1ubuntu1 is to be installed
                      Depends: liborc-0.4-0 (>= 1:0.4.16) but 1:0.4.16-1ubuntu2 is to be installed
                      Depends: libpostproc-extra-52 (>= 4:0.7.3-1) but 4:0.8.1ubuntu1 is to be installed
                      Depends: libswscale-extra-2 (>= 4:0.7.3-1) but 4:0.8.1ubuntu1 is to be installed
gstreamer0.10-ffmpeg:i386: Depends: libavcodec-extra-53 (>= 4:0.7.3-1) but 4:0.8.1ubuntu1 is to be installed
                           Depends: libavformat-extra-53 (>= 4:0.7.3-1) but 4:0.8.1ubuntu1 is to be installed
                           Depends: libavutil-extra-51 (>= 4:0.7.3-1) but 4:0.8.1ubuntu1 is to be installed
                           Depends: libc6 (>= 2.7) but 2.15-0ubuntu10 is to be installed
                           Depends: libglib2.0-0 (>= 2.31.2) but 2.32.1-0ubuntu2 is to be installed
                           Depends: libgstreamer-plugins-base0.10-0 (>= 0.10.31) but 0.10.36-1 is to be installed
                           Depends: libgstreamer0.10-0 (>= 0.10.31) but 0.10.36-1ubuntu1 is to be installed
                           Depends: liborc-0.4-0 (>= 1:0.4.16) but 1:0.4.16-1ubuntu2 is to be installed
                           Depends: libpostproc-extra-52 (>= 4:0.7.3-1) but 4:0.8.1ubuntu1 is to be installed
                           Depends: libswscale-extra-2 (>= 4:0.7.3-1) but 4:0.8.1ubuntu1 is to be installed