Currently running Opera 49.0.2725.39 with ffmpeg 2.8.11-0ubuntu0.16.04.1 on Ubuntu 16.04. When I updated Ubuntu from 4.4.0.101-generic to 4.4.103-generic it broke the video playback in Opera. Now I get a message install flash or H.264 decoder to support player. I've tried everything I can find regarding installing flash or updating ffmpeg, but all that stuff is out of date and none of it works. Thanks in advance for any help that actually works. 
1 Answers
I had a similar problem that might be what is happening to you. What happened was that Ubuntu updated the package chromium-codecs-ffmpeg-extra to version 63, of which Opera needs a specific version, without which codec H.264 doesn't work.
You can check in Synaptic Manager which version of chromium-codecs-ffmpeg-extra you have installed. Then, on Opera's address bar enter opera://about/ where you can check the Chromium version it needs.
Then, you could try installing version 61 of the chromium package. That worked for me. You can download it here: http://security.ubuntu.com/ubuntu/pool/universe/c/chromium-browser/
After version 61 is installed, in Synaptic Manager find and select the package and on the menu go to Package > Force Version, there select version 61. Apply changes to downgrade from version 63.
I hope that helps.
 
    
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