Sorry, but I have the same problem, am trying the same solution, but I'm getting "E: Version '2:0.123.2189+git35cf912-1' for 'libx264-123' was not found". Is it the wrong repositories?
Specifically: andrius@Ramblys:/etc/apt$ cat sources.list ############################################################# ################### OFFICIAL UBUNTU REPOS ################### ############################################################# ###### Ubuntu Main Repos deb http://us.archive.ubuntu.com/ubuntu/ saucy main restricted universe multiverse ###### Ubuntu Update Repos deb http://us.archive.ubuntu.com/ubuntu/ saucy-security main restricted universe multiverse deb http://us.archive.ubuntu.com/ubuntu/ saucy-updates main restricted universe multiverse ###### Ubuntu Partner Repo deb http://archive.canonical.com/ubuntu saucy partner deb-src http://archive.canonical.com/ubuntu saucy partner # one more, for DVD stuff. I think deb http://www.gtlib.gatech.edu/pub/ubuntu saucy main multiverse andrius@Ramblys:/etc/apt$ sudo apt-get install libx264-123=2:0.123.2189+git35cf912-1 Reading package lists... Done Building dependency tree Reading state information... Done E: Version '2:0.123.2189+git35cf912-1' for 'libx264-123' was not found -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1242215 Title: mencoder crashes with segmentation fault To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mplayer/+bug/1242215/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs