First add the repository :
[root@stizzo etc]# rpm -Uvh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm
Retrieving http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm
Retrieving http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm
warning: /var/tmp/rpm-tmp.j0X0rD: Header V3 RSA/SHA256 Signature, key ID 865cc9ea: NOKEY
warning: /var/tmp/rpm-tmp.4DMH1t: Header V3 RSA/SHA256 Signature, key ID f09d8368: NOKEY
Preparing… ########################################### [100%]
1:rpmfusion-free-release ########################################### [ 50%]
2:rpmfusion-nonfree-relea########################################### [100%]
[root@stizzo etc]#
Install flvtool2:
[root@stizzo etc]# yum install flvtool2
Repository base is listed more than once in the configuration
base | 4.3 kB 00:00
updates-released | 4.7 kB 00:00
Setting up Install Process
Resolving Dependencies
There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them.
The program yum-complete-transaction is found in the yum-utils package.
–> Running transaction check
—> Package flvtool2.noarch 0:1.0.6-4.fc11 set to be installed
–> Processing Dependency: /usr/bin/ruby for package: flvtool2-1.0.6-4.fc11.noarch
–> Running transaction check
—> Package ruby.i686 0:1.8.7.334-1.fc14 set to be installed
–> Finished Dependency Resolution
Dependencies Resolved
=================================================================================================================================================================================
Package Arch Version Repository Size
=================================================================================================================================================================================
Installing:
flvtool2 noarch 1.0.6-4.fc11 rpmfusion-free 23 k
Installing for dependencies:
ruby i686 1.8.7.334-1.fc14 updates-released 343 k
Transaction Summary
=================================================================================================================================================================================
Install 2 Package(s)
Total download size: 366 k
Installed size: 1.1 M
Is this ok [y/N]: y
Downloading Packages:
(1/2): flvtool2-1.0.6-4.fc11.noarch.rpm | 23 kB 00:00
(2/2): ruby-1.8.7.334-1.fc14.i686.rpm | 343 kB 00:00
———————————————————————————————————————————————————————————
Total 4.6 MB/s | 366 kB 00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : ruby-1.8.7.334-1.fc14.i686 1/2
Installing : flvtool2-1.0.6-4.fc11.noarch 2/2
Installed:
flvtool2.noarch 0:1.0.6-4.fc11
Dependency Installed:
ruby.i686 0:1.8.7.334-1.fc14
Complete!
[root@stizzo etc]#
Done, have fun 
