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| Hi all, I’m having some serious performance issues with EXRs and I thought I’d check to see if anyone else could help. I’m working on a fairly big project, all renders are supplied as EXR sequences with lots of channels. I’m working in 32bit float, linear. I have downloaded the latest Open EXR plugins from the fnord website (Hey Brendan! You there?) including Cryptomatte, which is a core tool. After Effects will work with a single EXR file quite well. Surprisingly well. If I import an EXR it opens and displays as quickly as any other format. If I use the ProEXR make comps feature (100% awesome) then it takes about 8 seconds to extract all the channels and display the contact sheet result. Cryptomatte and Extractor work very quickly. So basically - if I have a single exr frame in After Effects then all works fine. Cryptomatte alone has the potential to be a complete game changer... But as soon as I import an EXR sequence into AE then it all goes horribly wrong. Using the Pro EXR make comps feature now takes several minutes. Using Extractor to isolate a channel from the EXR now takes 30 - 60 seconds per frame. In some cases AE can take 5 - 10 minutes to show an image. And here’s the thing - this is for exactly the same exr file. If I manually import just the first frame of a sequence (or any frame) then one frame is great. As soon as I work with an exr sequence then everything becomes almost unworkable. It’s probably cache related. Yes I have the EXR cache enabled, but I have a suspicion that AE is wanting to cache every channel of the entire sequence before it displays a single frame. I’m about to make a screen recording of this for Adobe, as this is a significant problem for me and the project I’m on now. Any suggestions? -Chris |
