Just to clarify... I do not know if firefox is expected to be able to play mp4 or not. What is not nice is that it pretends to play, only to deliver a black box. If mp4 is not supported, a box saying so should be used instead.
-- 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/1451404 Title: mp4 video shows a black box, and audio only Status in firefox package in Ubuntu: New Bug description: Seen on Kubuntu 14.10, Intel Haswell laptop, 64bit distro. Try: https://www.airbus-fyi.com/medias/best-videos I am getting the audio, but a black box instead of video. Google chrome plays the video just fine. Please propagate upstream if necessary. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: firefox 37.0.2+build1-0ubuntu0.14.10.1 ProcVersionSignature: Ubuntu 3.16.0-36.48-generic 3.16.7-ckt9 Uname: Linux 3.16.0-36-generic x86_64 ApportVersion: 2.14.7-0ubuntu8.4 Architecture: amd64 BuildID: 20150417180024 CurrentDesktop: KDE Date: Mon May 4 12:53:53 2015 EcryptfsInUse: Yes InstallationDate: Installed on 2013-12-12 (507 days ago) InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) SourcePackage: firefox UpgradeStatus: Upgraded to utopic on 2014-10-30 (185 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1451404/+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