Just to be sure I read this right, you're saying that the file generated in Precise plays okay? If not, make sure you have gstreamer0.10-plugins-bad installed on your Trusty install: http://www.webmproject.org/tools/
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1323822 Title: Firefox can not play some WebM videos generated by avconv on Trusty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1323822/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs