[CentOS] MP4/H.264 codec for Firefox?

Tue Sep 26 19:26:07 UTC 2017
Roman Kennke <roman at kennke.org>


I am trying to get MP4/H.264 playback in Firefox to work on my CentOS 
laptop (for vimeo).

I installed the gstreamer plugins as described here:


(No, I did not install Flash, VLC and all the other stuff. I only want 
HTML5 MP4 playback..)

I enabled the nux repos. I did install all available gstreamer plugins, 
i.e. -good -bad -ugly -ffmpeg etc. No success.

Has anybody got mp4 playback working?

Here's a test page:


Help would be appreciated!

Best regards, Roman