With .mp4 can add another that will cause this - video/x-m4v So for example if a user sets Videos as default thru "Default Applications" then these 3 are entered in mimeapps.list video/mp4= video/mp4v-es= video/x-m4v=
Nautilus only sets the first one so if the other 2 exist then the default for .mp4 cannot be altered thru nautilus until they are removed or edited to intended new default. Also if another player is set thru Default Applications & the above 3 are in mimeapps.list then the default for .mp4 will only be changed if that player has all 3 in it's .desktop's MimeType= line -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/1280794 Title: Can't change default "Open with" application Status in “nautilus” package in Ubuntu: Confirmed Bug description: I am on Ubuntu 13.10 using nautilus 1:3.8.2-0ubuntu2.2. I am trying to change default application to open .avi files. I right- click an .avi file select "Properties", go to "Open With". There is a default application there (banshee) and recommended (VLC media player). I select VLC media player and click "Set as default" button, selection jumps back to banshee, "Set as default" button disabled and nothing else happens. Nautilus still opens .avi files with banshee. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: nautilus 1:3.8.2-0ubuntu2.2 ProcVersionSignature: Ubuntu 3.11.0-15.25-generic 3.11.10 Uname: Linux 3.11.0-15-generic x86_64 ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 Date: Sun Feb 16 21:45:45 2014 GsettingsChanges: b'org.gnome.nautilus.window-state' b'geometry' b"'1497x873+0+171'" InstallationDate: Installed on 2013-11-17 (91 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MarkForUpload: True SourcePackage: nautilus UpgradeStatus: No upgrade log present (probably fresh install) mtime.conffile..etc.xdg.autostart.nautilus.autostart.desktop: 2013-11-20T19:34:55.419627 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1280794/+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