G'day Folks
In the hopes of perhaps helping someone else I am describing how I was able to get my Centos6.2 system to play AVI files

When Centos 6.2 is installed it includes "totem movie player" but when I tried to play any "avi" files I would get error messages
saying it needed decoders. The search would return unable to find gstreamer-plugins-ugly and gstreamer-ffmpeg.

There is doco, that I found about RPMforge at http://wiki.centos.org/AdditionalResources/Repositories/RPMForge#head-f0c3ecee3dbb407e4eed79a56ec0ae92d1398e01 about installing extra media packages.
But the doco does not mention the gstreamer packages, even though, after testing/research, I found RPMforge makes them available.

To verify what I did works cleanly I
I - installed centos6.2 onto a brand new partition and followed my standard install process, which I have previously posted in these forums,
II - installed Adobe Flash player.
III - Installed as follows


Mostly I followed their instructions.

0: Open a terminal and switch to root useridMaking Totem Movie Player wok with avi files.
1: Download file rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm
2: rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt
3: rpm -K rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm
4: rpm -i rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm


At this point I deviated from their instructions and did these 2 steps
5: yum install gstreamer-plugins-ugly
6: yum install gstreamer-ffmpeg

And verified that Totem Movie Player was able to open a couple of my .avi files.




(For those interested before I started /etc/yum.repos.d was
adobe-linux-x86_64.repo
CentOS-Base.repo
CentOS-Debuginfo.repo
CentOS-Media.repo

after step 4 the following had been added
mirrors-rpmforge
mirrors-rpmforge-extras
mirrors-rpmforge-testing
rpmforge.repo


The actual packages added were
a52dec.x86_64 0:0.7.4-8.el6.rf will be installed
lame.x86_64 0:3.99.4-2.el6.rf will be installed
libdvdread.x86_64 0:4.1.4-0.2.svn1183.el6 will be installed
libid3tag.x86_64 0:0.15.1b-11.el6 will be installed
libmad.x86_64 0:0.15.1b-4.el6.rf will be installed
libmpeg2.x86_64 0:0.5.1-2.el6.rf will be installed
libsidplay.x86_64 0:1.36.60-1.el6.rf will be installed
opencore-amr.x86_64 0:0.1.2-1.el6.rf will be installed
orc.x86_64 0:0.4.11-1.el6.rf will be installed
twolame.x86_64 0:0.3.13-1.el6.rf will be installed
x264.x86_64 0:0.0.0-0.4.20101111.el6.rf will be installed

gstreamer-ffmpeg.x86_64 0:0.10.11-1.el6.rf will be installed)

Cheers Zach

http://wiki.centos.org/TipsAndTricks/MultimediaOnCentOS

Could use an update for CentOS-6 but pretty close.