Source Recorder Small Lags

So I followed another tutorial on here how to record via the Source Recorder in Garry’s Mod. I chose Uncompressed, and i had a 4gig unplayable avi file.
I compressed it with a Video converter, and watched it.
It was a very good result BUT…

I had like 50 NPCs and took the RPG and shot at them, somehow in the video when the NPCs where about to fly away, the NPCs like lagged one or two frames so they flyed out quicker but after those 2 frames they were back on their original position, when they’re gonna fly away.
So how do I fix this problem?

It’s kinda hard to explain, cause i’m not very good at english :stuck_out_tongue: but hopefully you’ll understand.

Thx