I don't know if this helps finding the solution.
Lagging is most likely related to the format of the video files you are using. Crashing is possibly something else. What format are your video files, and what codec do they use?
For the crashing (not while exporting), what seems to cause the crash? Is it related to using a specific tool or function? Is it linked to having the software running for a certain period of time, or importing a certain amount of video files?
@AxelWilkinson When i crash exporting it always happens at a certain point and i have good specs.
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