Speed up the OCR labels script

[rafelafrance]

The is very slow and, currently, only runs on a single process because because my GPU is so small; even a 1080Ti could run two processes. It's EasyOCR that is using the GPU.

Ideas:

• Muti-process every thing except for the EasyOCR part.
• Run the GPU logic (or everything) on multiple machines. I have 2 and this could roughly double the speed.
• Of course I could also try to find a bigger GPU. Colab?
• Replace EasyOCR with...