I am not sure what changed, but my Amarok install has stopped playing my existing m4a library.

I'm running amarok 1.4.8 on Fedora 8 64 bit.

I've installed the xine_non_free_extras as well as the amarok_non_free_extras.

I've previously had the ability to play this library and now can not with the "No suitable demux plugin" message.

I'm a complete noob with command line instructions so I'll need everything in baby steps!

I have the same problem as parent poster.  2 days ago, my m4a files played fine on two different machines running amarok 1.4.7 using the xine engine.
One is an Acer laptop with an AMD Mobile Sempron, the other is a Core2Quad system.  Both are running Amarok on Fedora 8.  Everything was all good 2 days ago, and I don't recall any package updates in the last 2 days.

If there's any debugging I can try to do that would be helpful, or any other information I can provide, feel free to ask and I'll do my best to get it.

I'll look for the yum update log to see if any new packages got installed in the last few days and I just didn't notice.

Just a follow up, it is actually not 1.4.7 anymore, my yum log shows an update to 1.4.8 last week.  The laptop that showed the last played for my m4a files 3 days ago didn't get updated until the 9th.  As above, both systems are running Fedora 8, and the package version is 1.4.8-4.fc8.i386.

Also changed in the same update were some xine packages, namely xine-lib 1.1.11-fc8.i386 and xine-lib-arts-fc8.i386.  So I suppose either of those could have caused the m4a/aac breakage.

I have yet to try compiling from the SVN source, so I don't know if it works or is fixed there.  I did read on some suse linux mailing list some other complaints of m4a breaking after upgrading to 1.4.8.

I'm also having the same problem.
Fedora 8 x64 - Intel Core 2 Duo
Everything was working as late as April 1 2008 (no clue what day it actually stopped working).

Any ideas?

Also... Xine will no longer play m4a, but RealPlayer/Helix will.

Thanks!

Update... I've been messing around installing / uninstalling packages to no avail.

My home PC (also running F8) is playing fine, but I have not pulled the latest package updates.  It looks like there are updates to xine-lib and xine-lib-extras-nonfree that introduce breaking changes.

I can't figure out how to get the older packages back.  They previous version no longer shows as an option in package manager.

Please help a newbie out!!  I can't go another day without my tunes.