the previews come from totem, if totem can't play them that's probably normal that it can't thumbnail them, you might need gstreamer0.10-ffmpeg or something
** Package changed: nautilus (Ubuntu) => totem (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to totem in Ubuntu. https://bugs.launchpad.net/bugs/967920 Title: nautilus is unable to load some video previews Status in “totem” package in Ubuntu: New Bug description: Nautilus is unable to load some MP4 video files previews. I also noticed that Totem cannot playback these videos but other video players can, like gnome-mplayer for example. I send a screenshot ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: nautilus 1:3.3.92-0ubuntu2 ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12 Uname: Linux 3.2.0-20-generic x86_64 NonfreeKernelModules: fglrx ApportVersion: 1.95-0ubuntu1 Architecture: amd64 Date: Wed Mar 28 22:22:33 2012 EcryptfsInUse: Yes InstallationMedia: Xubuntu 12.04 "Precise Pangolin" - Beta amd64 (20120228) ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: nautilus UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/totem/+bug/967920/+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
