GStreamer 설치에 플러그인이 없습니다.

Linux (SL)의 뮤직 플레이어 (Rhythmbox Music Player)에이 문제가 있습니다.

그것은 말한다 :

Couldn't start playback
Your GStreamer installation is missing a plug-in

시스템에 모든 플러그인이 설치되어 있습니다

[alexus@wcmisdlin02 ~]$ yum list gstreamer-plugins-*
Loaded plugins: refresh-packagekit
http://10.52.208.221/yum/extras/repodata/repomd.xml: [Errno 14] PYCURL ERROR 7 - "couldn't connect to host"
Trying other mirror.
Installed Packages
gstreamer-plugins-bad-free.i686                                                                                0.10.19-2.el6                                                                   @sl                                          
gstreamer-plugins-bad-free.x86_64                                                                              0.10.19-2.el6                                                                   @anaconda-ScientificLinux-201107271550.x86_64
gstreamer-plugins-bad-free-extras.i686                                                                         0.10.19-2.el6                                                                   @sl                                          
gstreamer-plugins-bad-free-extras.x86_64                                                                       0.10.19-2.el6                                                                   @sl                                          
gstreamer-plugins-base.i686                                                                                    0.10.29-1.el6                                                                   @sl                                          
gstreamer-plugins-base.x86_64                                                                                  0.10.29-1.el6                                                                   @anaconda-ScientificLinux-201107271550.x86_64
gstreamer-plugins-good.i686                                                                                    0.10.23-1.el6                                                                   @sl                                          
gstreamer-plugins-good.x86_64                                                                                  0.10.23-1.el6                                                                   @anaconda-ScientificLinux-201107271550.x86_64
Available Packages
gstreamer-plugins-bad-free-devel.i686                                                                          0.10.19-2.el6                                                                   sl                                           
gstreamer-plugins-bad-free-devel.x86_64                                                                        0.10.19-2.el6                                                                   sl                                           
gstreamer-plugins-bad-free-devel-docs.x86_64                                                                   0.10.19-2.el6                                                                   sl                                           
gstreamer-plugins-base-devel.i686                                                                              0.10.29-1.el6                                                                   sl                                           
gstreamer-plugins-base-devel.x86_64                                                                            0.10.29-1.el6                                                                   sl                                           
gstreamer-plugins-base-devel-docs.noarch                                                                       0.10.29-1.el6                                                                   sl                                           
gstreamer-plugins-good-devel.i686                                                                              0.10.23-1.el6                                                                   sl                                           
gstreamer-plugins-good-devel.x86_64                                                                            0.10.23-1.el6                                                                   sl                                           
[alexus@wcmisdlin02 ~]$ 

유일하게 빠진 패키지는 개발 패키지입니다 ... 어떤 아이디어?

이것이 누락 된 것입니다 ...

[alexus@wcmisdlin02 ~]$ sudo tail -1 /var/log/yum.log 
Nov 15 12:43:38 Installed: gstreamer-ffmpeg-0.10.11-1.el6.rf.x86_64
[alexus@wcmisdlin02 ~]$