I still have the same problem, too .mp4 and several .flv files are also not playable.
I checked out the video codecs and found out that all files, no matter if they were a .mp4 .mkv .flv, used the h264 video codec. I got this from the information ffmpeg gave me. I added an .flv video as attachment, but it should do as well. ** Attachment added: "video.flv" http://launchpadlibrarian.net/23755722/video.flv -- nautilus crashed with SIGSEGV in memset(), when clicking proprieties menu https://bugs.launchpad.net/bugs/332860 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs