Ubuntu
firefox package

  1. Bug #1323822
  2. Comment #21

Comment 21 for bug 1323822

Kevin Shenk (batonac) wrote :

As this is fixed in libav upstream, it is possible to fix webm files on trusty using a libav update PPA:
https://launchpad.net/~motumedia/+archive/libav10-trusty

After enabling the PPA and updating libav, you can use this command to fix the webm files:
avconv -i input.webm -codec copy output.webm