I'm facing the same issue. The point where the conversion of the MPEG-4 video stops is not always the same. Tried also on another machine with Ubuntu 10.04 and Brasero 2.30.2. There this error did not occur.
** Attachment added: "backtrace file" https://bugs.launchpad.net/ubuntu/+source/brasero/+bug/793216/+attachment/2431956/+files/gdb-brasero.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to brasero in Ubuntu. https://bugs.launchpad.net/bugs/793216 Title: Brasero hangs when trying to burn mpeg4 file to DVD as NTSC Status in “brasero” package in Ubuntu: Incomplete Bug description: Binary package hint: brasero Brasero hangs when trying to burn mpeg4 file to DVD as NTSC. Hangs at 8 MiB of 2344 MiB. Also shows "converting video file to mpeg2" within the same pane. ProblemType: Bug DistroRelease: Ubuntu 11.04 Package: brasero 2.32.1-0ubuntu2 ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2 Uname: Linux 2.6.38-8-generic i686 Architecture: i386 Date: Sun Jun 5 13:11:44 2011 ExecutablePath: /usr/bin/brasero InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1) ProcEnviron: LANGUAGE=en_US:en LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: brasero UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/brasero/+bug/793216/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp