I am using shotcut version 21.03.21, because I was having bugs on running both of the may versions.
But having bugs is not my problem, I just want to know how to use my GPU for decoding and encoding, So there is less load on my CPU and I can render fast on blender.
And I am using an Intel® Core™ i9-10900X X-series Processor (19.25M Cache, 3.70 GHz) with 256 GB Ram (Shotcut was not running before on 256GB but when I re-installed windows it started working), And I have a single GeForce GTX 1660 SUPER on the motherboard and the motherboard is msi creator X299.