Update renderer#63

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ILW8 wants to merge 9 commits intoLeaPhant:mainfrom

ILW8:update-renderer

Commits on Oct 13, 2021

make frame renderer and video encoder work in parallel, use IPC rather than temporary files for communication (WIP)
ILW8
committed
add render throttling
ILW8
committed

Commits on Dec 25, 2021