Roto brush propagation is much slower in 18.4.1 version
Propagation slows down drastically as it goes, and after a couple seconds worth of footage rendering, it basically stops and becomes unusable. Using default settings when roto is applied.
After rolling back to Ae 18.1, propagation is literally thousands of times faster. On my system it will propagate a 30sec clip in a couple minutes. Still slows down over time, but something is happening in the new versions of Ae that it gets hung up on very quickly. System specs are attached below.
Jakob Eriksen commented
Roto brush v2 is major game changer. That is why it is so important that adobe fixes all the bugs. This need to be reliable even on long sequences with highres footage. It is important to have the ability to have a rotobrush v2 sequence to render overnight to extract a mask, without memory leaks an craches.
Rotobrush code should be optimised for GPU.
James Landy commented
Thanks for reporting the performance slowdown when propagating frames. I'm sorry you had to encounter that. We have made several performance enhancements to RB and fixed multiple issues.
The fix is in 22.1 beta (builds 5 and higher). It’s also in 22.0 which is slated for public release later this month (Oct.). Please give it a try when ready and let me know how things are looking on your system.