When using OFS to open 4K or higher-definition videos, there will be a lot of lag and it is difficult to modify the funscript. Is there any good solution?

[HeelsLover69]

Or even better, use IFramer by CertainlyWicked with GPU support to create i-frame versions of your videos:

Fun Expander 2.5.3 - Video converter with ffmpeg to i-frames added [Updated 2025-09-17]

With his or mine? I’ll see what I can do, just want to finish the set of scripts I’m working on currently before I get to it. Stay tuned, will be back.