Just upgraded to trusty. there is no package "gstreamer0.10-ffmpeg": # apt-get install gstreamer0.10-ffmpeg Package gstreamer0.10-ffmpeg is not available, but is referred to by another package.
It is rumoured that one has to use libav nowadays. It would have been nice if the upgrade process had taken care of that. # apt-get install gstreamer1.0-libav But that doesnt help. The previous comment suggest that firefox-30 might be needed. # apt-get remove firefox Removing firefox (29.0+build1-0ubuntu0.12.10.3) ... # apt-get install firefox Setting up firefox (32.0+build1-0ubuntu0.14.04.1) ... Maybe the version is 32 now. But no mp4 videos are played. Maybe someone can publish a sequence of steps to follow in order to get a trusty with firefox that plays mp4? -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1280905 Title: firefox on ubuntu 14.04 does not play mp4 files Status in “firefox” package in Ubuntu: Fix Released Bug description: On xubuntu 14.04 the package gstreamer0.10-ffmpeg_0.10.13-5_amd64.deb is not available, so I could not use mp4 h264 files in html5 tags. I used the .deb package from ubuntu 13.10 and after an apt-get -f install everything works fine. I don't know why the gstreamer0.10-ffmpeg package is not available anymore, it looks like firefox could use gstreamer1.0-libav. I don't know if the h264 decoder is enabled in gstreamer1.0-libav package. I hope that this bug report will help people get html5 video working. Tested with firefox 25 and 29. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1280905/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

