I have made a 1:30 hour long video. Its made up of a series of mlt clips.
There are 2 issues after exporting:
1: Near the end of each clip, the video freezes till next clip starts.
2: Most of the mlt clips used make use of 2 video timelines, the top timeline in those does not start at the correct time, where the cut should start. When watching and exporting those mlt seperately they work fine.
I use Windows 10, latest Shotcut, and exported using h.264 main profile