Missing Codec in Fedora 13

[Marvin Kosmal]

Hi

Just installed Fedora 13.  Upgraded from 12..

My movie player will not work.

Error message below..

The playback of this movie requires a Advanced Streaming Format (ASF)
demuxer plugin which is not installed.


Neither yum or the package manager could find it.


I googled and got a 1000 hits..  After checking I am not sure who/what
to trust...

Is there a trusted Fedora site where I can get this codec??

TIA

Marvin