The original author here is using a Pi 4 which is well known for being pretty fast and hot. One easier way to solve the power usage problem would just be to not

The original author here is using a Pi 4 which is well known for being pretty fast and hot. One easier way to solve the power usage problem would just be to not use a Pi 4. Something like a Zero 2W might be able to pull it off since it has a quad core cortex A53 SoC which runs with dramatically less power. The Cortex A72 in the Pi 4 is great but it is a comparatively very large processor compared to the A53 (you even often see A72-A53 big-little SoC configurations for this reason. GPU acceleration might become necessary for high performance video streaming but iirc the VideoCore IV on the Pi is pretty okay, especially for transcoding.