https://bugs.kde.org/show_bug.cgi?id=455386

--- Comment #7 from Eoin O'Neill <eoinoneill1...@gmail.com> ---
Alvin, 

I think I may have solved this issue, but I would like you to test it on
Windows to see if the problem persists for you (I don't have a windows test
environment atm) and if they do, please reopen the bug.

Diving into the FFMPEGWrapper code, there are issues with how we are treading
the subprocess. By having a "blocking" ffmpeg process, we are preventing the UI
from updating. This is a bad design and we should be approaching this with a
"Futures" based approach (I.E. schedule a task to occur after process has
concluded.)

At some point I plan to redo parts of how our exporter works, which would be a
good time to change this approach.

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