* This wasn’t a problem with the older QuickTime capture QuickTime movies can have variable framerate. When you play back the AVI, motion will be in “normal time” and will be frame-perfect, even if you’ve picked a high framerate, large movie size, and heavy rendering settings.** If you’ve picked very high rendering settings, you’ll see X-Plane running in what appears to be slow motion while capturing an AVI in replay mode. When you record an AVI movie in replay, X-Plane slows down its playback of the replay as necessary to guarantee that it can render and compress each frame at the framerate you have selected for your AVI. There is another way to make a movie, however, that will give you much better quality: record your replay. If X-Plane’s framerate is fluctuating, the AVI movie can’t record that properly, because AVI files run at a fixed framerate.*.X-Plane itself might not be able to hit the framerate you’ve selected in the AVI capture settings.(This isn’t a huge problem because the AVI compressor is multi-core, so it can usually keep up on modern machines.) In this case you’ll see a message on screen about dropped frames. X-Plane might not be able to compress and save the frames to disk as fast as they’re being recorded.When you capture an AVI movie in X-Plane, a few things can make the video capture look bad:

X plane 11 video rending options