can not install mythtv

[Robert Roth]

Can not install mythtv on Quantal, as mythtv packages depend on libmyth-0.25-0, which in turn depends on libx264-120, which is not available in the Quantal repositories, only in Precise, as Quantal already has libx264-123.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: mythtv (not installed)
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Sat Nov 17 23:18:21 2012
InstallationDate: Installed on 2012-11-17 (0 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: mythtv
UpgradeStatus: Upgraded to quantal on 2012-11-17 (0 days ago)