I had been stuck for months trying to get VLC installed. Numerous dependency errors with Yum. After losing sleep trying to track down each missing library, I gave up.....until last week.
The solution for me:
1) Edit the Livna.repo file and comment out the "#exclude=mplayer* mencoder* ffmpeg*". (Added the "#")
2) I could then install VLC ("yum install vlc")
3) Returned to the Livna.repo file and edited the file back to it's original state. (remove the "#")
Hope this helps at least one person out there.