no available decoder MP3 / M4a playback

Hello,
Apologies if a solution to this has already been posted. I've searched this forum but found no answers. I'm a complete beginner at Linux, being used to OSX. I'm trying to play audio files copied from my iTunes library with the .M4a extension, but cannot get them to work with the AA1 supplied media player. I downloaded Amarok which seems to have installed correctly but is also unable to play my files due to 'no available decoder'.
Can anyone help me with this?
Many thanks!

 

viewtopic.php?f=17&t=7693&p=50493

If you've already installed it, then leaving out the install amarok line is the obvious call. The rest of the lines set you up for mp3/m4a

 

Many thanks for your reply. I followed all your instructions in viewtopic.php?f=17&t=7693&p=50493 but got the following response in terminal:

No package rpmfusion-free-release available.
No package rpmfusion-nonfree-release available.
Nothing to do

and

No package amarok-extras-nonfree available.
Nothing to do

This seems very strange, as others have reported success with this method. Any suggestions gratefully received!

 

Terribly sorry - if you read further down, you'll see you need to run sudo yum update fedora-release before any of those lines.

 

Thank you so much, it works perfectly now!