- download https://github.com/iteufel/nwjs-ffmpeg-prebuilt/releases/tag/0.20.3
- unzip
- move and restart browser:
cd /usr/lib64/opera
sudo mv libffmpeg.so libffmpeg.so.orig
cd ~/downloads
sudo cp libffmpeg.so /usr/lib64/opera
cd /usr/lib64/opera
sudo mv libffmpeg.so libffmpeg.so.orig
cd ~/downloads
sudo cp libffmpeg.so /usr/lib64/opera