Possibly relevant: https://code.google.com/p/chromium/issues/detail?id=130313 Default duration is not used anymore, so newer avconv may not bother setting it to a valid value. Of course, if FIrefox still expects that value to be valid, it could cause problems..
** Bug watch added: code.google.com/p/chromium/issues #130313 http://code.google.com/p/chromium/issues/detail?id=130313 -- 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/firefox/+bug/1323822/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs