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I am rendering Scene strip from VSE in OpenGL mode and only 1 of 16 threads (AMD Ryzen 1700) is fully loaded, others are just around 5-10%. Overall CPU usage is about 15-20%.

Firstly I thought low perfomance could be caused by the fact that VSE is not multithreaded. But tested it with Cycles Scene strip and everything is fine - all threads are busy.

Need to speed up this OpenGL thing somehow, preferably without instancing of Blender app itself.

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    $\begingroup$ VSE does not support multithreading. It's completely independent from any of the render engines because its only purpose is to edit videos composed of already rendered images (or otherwise acquired images). $\endgroup$
    – metaphor_set
    Jan 23, 2019 at 15:04
  • $\begingroup$ @metaphor_set, VSE doesn't support multithreading on image/movie sequence, NOT Scene strips. I've tested Cycles scene strip and it works as like normal render, but not OpenGL. $\endgroup$
    – Serge L
    Jan 23, 2019 at 15:58

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