I am sure you guys get this question a lot, but i hope my case is little different.
I have an ae project and i often just need to change pictures and re-render. I don't even change the project file at all as i just update jpeg files that the project references.
Is there a way to pre-process the part of video that does not involve the picture and save it somewhere, so AE doesn't have to re-think very hard?
Another question is which video format would have the shortest amount of rendering time?
I have been using WMV and i am trying out h264 but was wondering if there is a better option.
For output codecs, I generally recommend to a lossless or mastering codec (using the Lossless preset, or a high-quality lossy codec like CineForm, DNxHD, or ProRes) and then compressing from there.
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