I tried rendering to avi and mp4 but each time it ends up making the video glitch like the gif above.
I change the frame rate and the resolution but nothing fixes this. How do I fix this. I am using the dev version on windows if you are wondering.
Which version of Synfig did you use? This happened to me when I exported directly as mp4 in the development version. The best way would be to export as png image sequence then use a video editor to make it into a video
Have you tried rendering with the command line interface instead?
What is exactly the glitch ?
Lateral movement?
Changes of colors?
Did you try to export as MP4 LossLess?
Did you try a Linux AppImage in WSL2? (see here)
A specific use of a converter or layer?
Does it work in another version of Synfig?