[Feature request] *batch upscale, but once upscaled, encode all at the same time.*

[DuckersMcQuack]

Is your feature request related to a problem? Please describe.
Not a problem, but a nifty feature for us with many cpu cores (8 or more)

Describe the solution you'd like
batch upscale videos, it interpolates say 2 at a time. RTX upscale solution only uses 50% gpu usage. Don't know if that's just max output of the tensor cores or the RTX cores, which equals 50% cuda load though.
but simultaneously encode the upscaled frames per cpu thread all at once once all of them has been upscaled individually.
In handbrake, i convert movies to AV1 for tiny 1GB sized outputs, and it's done by opening one handbrake instance per movie, 7 at a time, and set affinity for each cpu thread. So i have say 6 cores spare, so i set each handbrake for each their cpu thread to give the best quality possible per movie, all running at once.

Describe alternatives you've considered
A frame assembler/photoshop/premiere pro, but same principle. 7 instanes, each given 1 thread each, and export the upscaled png sequence in each, and combinding all at the same time.

Additional context
Add any other context or screenshots about the feature request here.