I've been masking all day today and everything has worked perfectly up until now. I did my usual mask and then rendered it but upon render everything screwed up. I have tried multiple times and I've even gone as far as to re-import the clip and mask it all over again. The results were different but only in the pattern of the glitch. Im busy uploading the clips of the glitch right now so I'll just have to explain it for now. Basically everything looks perfectly fine in the ram preview window but when I render it, it separates the video around and the mask is completely messed up. Can someone please help me with this? It's incredibly frustrating when everything else today has gone smoothly. Im using After Effects CC
Ram Preview Window: http://i.gyazo.com/5b9f5829fec0509130ba471c57691705.png
After Render: http://i.gyazo.com/bcc1038e25171d4491f09b613bfe3b4c.png
P.S. Yes please don't judge I am doing an anime video we're all editors here aren't we?
This is not masking, you are using the Rotobrush which by its very nature is unsuitable for the kind of work you are using it for. since the comic was drawn artificially in the first place, there are no fine detail patterns to recognize and temporal consistency is limited. You need to forget about it and use real masks.
Actually I solved the problem by freezing all of it.