I'm working for a client that gives me around 45 minute videos and I have to hide his face throughout the entire video, hence the tracking. The only thing I found that speeds it up a tiny bit is emptying the disk cache but few minutes later it's bogged down again and obviously as it's a 45 minute video I can't keep constantly emptying it all the time.
This is what my tracking area looks like untitled.png
I heard that the best way is to make the tracking area smaller but as I'm trying to track the head movement for a long time I don't think this will work well. Unless someone can look at that image and has an idea?
The video was a 4k mp4 vid and I already encoded it into this quicktime format: 1.png
Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
NVIDIA GeForce GTX 1060Ti
1 SDD (where the disk cache for AE is in preferences) and 2 HDD's
Using Adobe After Effects 2019
It looks like you're choosing a really bad intermediate file. Use ProRes, Cineform, or DNxHD. The intermediate format you're using is an outdated codec and way, way too tiny if your client is going to want HD or 4k when you return it to them.
As far as tracking goes, have you considered using Mocha AE? It comes included with After Effects and could be a bit faster.
King Pin tracker from Red Giant, if you have access to their software is really fast. You could easily use that. (I think they still have the sale for half off of Red Giant Complete, but today's the last day this code works RGC50 )
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