Same problem with dev tools. Every open it resets theme to light...

ffmpeg --version

ffmpeg version 3.0.2 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
configuration: --disable-yasm
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
Unrecognized option '-version'.
Error splitting the argument list: Option not found

Although the application was installed, but this query is the same result.

"dpkg -s libffmpeg" - 'this package not installed' in this query!
Already installing...

OS - Linux Mint 17.3
https://jsfiddle.net/mb8pv6tn/3/ - not playing in Opera with this OS.

In Mozzila Firefox everything works fine, but I do not like this browser!

In English. Can't play audio in "<audio src =" ... "controls> </ audio>" In 'src' is connected Mp3-file. The player isn't active, javascript can't run it too. It's the latest ver Opera for Linux.

Не воспроизводится аудио через "< audio src="..." controls >< /audio >"
Вставляется mp3-файл. Плеер не активен, javascript тоже не может запустить.
Наблюдается в последней версии Opera для Linux.