I have a very similar situation
My os details are:
ROSA Desktop Fresh R8.1 2014.1
KDE Plasma Version 5.7.2
KDE Frameworks Version 5.24.0
Qt Version: 5.6.1
Kernel Version: 4.1.38
Os Type: 64 Bit
Hardware details are:
Intel Core2 Duo E8400 @ 3ghz on Gigabyte GA-EP45-DS3R, with
7.8 gb ram &
GeForce Gt 630 as a display driver
Here’s my application log file from my bigger project (~9min) that has a pretty complex structure. To check that the problem wasn’t in the complexity of the project, I tried to export just one short&unedited mp4 file from the timeline without success. It just pends forever no matter what I do.
Job log remains blank as it is doing nothing during that pending I guess.
I begun my project with OpenShot, but it is terribly prone to crash in my system. However, I was able to export from it and it did not fail during the export process. With Shotcut, it seems to be the exact opposite: everything else works almost flawlessly, but… Now I wish that I could import my Shotcut project into the OpenShot and export it from there. I guess it can’t be done, though.