For me the issue was solved by changing hdmi audio output from hdmi to analog in sound settings...
-- 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/1412700 Title: YouTube Vimeo Amazon Playback broken Status in firefox package in Ubuntu: Fix Released Bug description: In Mozilla Firefox, Google Chrome and Chromium (probably HTML5 based) video and audio playback is broken. Vimeo: Video has no sound, runs too fast or hangs Youtube: Video has no sound, runs too fast or hangs Amazon: MP3 Previews not working anymore (no sound but time display correct) System sound is working fine in all other places. Behavior is the same when using a new user account. When all these services where flash based, no issues where observed. A long search around found no reason so far. Suspect might be a video codec/decoder issue? Description: Ubuntu 14.04.1 LTS Release: 14.04 firefox: Installed: 35.0+build3-0ubuntu0.14.04.2 Candidate: 35.0+build3-0ubuntu0.14.04.2 Version table: *** 35.0+build3-0ubuntu0.14.04.2 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 500 http://us.archive.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages 100 /var/lib/dpkg/status 28.0+build2-0ubuntu2 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1412700/+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
