I have questioned this before but have received no direct answer. Colorizing is extremely slow, around 96 hours for a 480p resolution video. The CPU is not used at all (stays 1-3%) and the GPU is used in sporadic, short bursts, sometimes over 90%, but not continuously. I have NVIDIA RTX 4070 Super 12GB, Intel Core i9 14900K Raptor Lake 10nm Technology, and 64GB RAM. What is going on?
On another note, I could not get 3.0.2.9 to run until I disabled Hyperthreading on the CPU in the bios.