A few months ago, I was trying to create a film of various images and clips of footage. However, all the footage was in various speeds – some in 6 frames per second (is that speed a crime in the film world?) and some in 30 frames per second. So when I added in the 30 frames per second bits, it was in super slow motion.
Today, the issue came up again, but I searched a bit and I figured out how to get around this in Blender’s video sequence editor. I’m pretty happy to have discovered this! And it was super easy, ALTHOUGH I messed it up the first couple of times.
It also took me a few times searching to find the simple solution (for my case). I found this stack exchange Q&A, from which this was the important tip (the tip was actually in the question being asked) …
The method I have been using, up until now, is to import all the movie strips. Then set the frame rate for the project to 30f/s and on the 120f/s strips, add a speed control effect strip, to change the speed to that of the audio.
So I learned about the whole speed control thing, lovely!
Still took me a while to get it to work right. You think you’ve done it right, but then you add a ‘transform’ strip and it messes up. Or you try to edit down your video, not for the sake of speed control but because you want to chop a piece of it off, and it messes up again. This speed control has to be done with tender gloves.
I found some tutorials to help out, but they were both super annoying! One of them, you couldn’t hear the audio. The other had to give a whole introduction and blab on before he got to the point. But when he finally got around to it, I was able to see a demonstration of how the speed control works.