The problem I'm having is when I export my 2 and a half hours project into an MP4 File, the file only plays for maybe the first 60% then it's becomes darkness afterwards [after 1hr-37min-50seconds] video becomes black with no audio or video, but playing still.
I get dark screen with no audio/video in my media player. I can't play the remaining 40% of the video in VLC/MediaPlayerClassic/ even inside Videostudio itself. When my exported 2.5hrs video reaches 1hr-37min-50seconds] it continues to play but total darkness with no audio.
Project contains multiple MTS files from my camera memory that I brightened up and increased exposure and merge into one big MP4 file.
Using Corel Videostudio X8 Version 18.6.0.6 and is supposedly fully updated because I have updated it recently and when I check for updates it says there's no available updates.
Project source is multiple MTS files from Camera memory. Here is a sample MTS PROPERTIES image:


Here's the exported MP4 properties:


The project renders successfully, but the MP4 is partially corrupt of course.
Here is my rendering output configurations:

My system properties:

I tried enabling/disabling hardware encoder acceleration but didn't help
When rendering a shorter video [1hr for example] I am not facing any issues with exported MP4. But when it's long +2hrs this problem occurs.
Please let me know how to solve this. Any help is very much appreciated.
