Problem with version 2.6.12

[eumagga0x2a]

Yes, confirmed fixed by https://github.com/mean00/avidemux2/commit/e9287b0f902916a15946d6c8b7def251e05a10d6, thanks! The main roadblock for using avidemux3_qt5 on Fedora seems to be removed

I'll start new threads for remaining qt5 related issues I see, one at a time (unless you wish to stick to this one).