Firefox 30 has been released with support for GStreamer 1.0. It should be available in Ubuntu Precise, Saucy and Trusty in a day or two. Can you test with Firefox 30 and see if this bug is fixed?
** Changed in: firefox (Ubuntu) Status: Confirmed => Incomplete -- 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: Incomplete 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 : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp