One more thing is that in the Opera 30, the PPAPI version is 17,0,0,188. Meanwhile in Chromium it's 18,0,0,160.
Okay, so now your problem is solved. I guess there are different versions because Chrome use another installation then the one Opera use. You will just have to wait for an update.
did installed version 30. But what I don't like in it is that Opera keeps starting a lot of instance in my system.
It has one "instance" for every tab, which actually increases the performance (so it's a good thing).
Opera 29 did not crash
Chrome does not have a problem with ffmpeg (does not crash)
crashes are not related to playing videos, for example, Gmail just crashed in the background...
I left Chrome because it's lack of support for hiDPI displays. But that is no longer a problem, so it seems to make sense to go back... it's more stable now, and does not have a problem with my remapped Caps-Lock key...
I have imported them from opera 12, those were gone, the one I typed afterwards in new opera, that one got saved. Maybe it is the imported ones that get lost.
Okay, so the problem is with Opera 30. Reverting to Opera 29 solved the issue. You can see the solution in the thread named "How to downgrade opera 30 to opera 29".
I agree with you. Although compiling ffmpeg yourself isn't hard, it's not for regular users. Also, most users don't even know about this and wont get a working solution at all, which is very sad. At least I think info about this problem with ffmpeg should be pinned (an announcement) in this forum category.
You have to reload every page you had open before you installed the extension, in order to get it to work.
On some pages extensions doesn't work, like on internal pages and on addons.opera.com.