Scrypted on Gigabyte BRIX Celeron J3160 Braswell - no HW transcoding

[trojantomasz]

Hi, it is my first post here so ..
Like in the topic - Scrypted in Docker, with docker-compose following the official specification, uncommented /dev/dri and /dev/bus/usb, persistent storage configured. Everything works fine, I can add any cameras without a problem. But, it is heavily loaded (in Portainer, I can see 60-90% CPU load with just one camera added, without transcoding, just standard config, no Homekit yet). Cameras are rather standard, with H264: 2880x1620 @ 2101 Kb/s, h264/pcm_alaw, 2.0 keyframe intewrval, detected oddities: {"fuab":false,"stapb":false,"mtap16":false,"mtap32":false,"sei":false,"reserved0":false,"reserved30":false,"reserved31":false}

PC is a mini Gigabyte BRIX GB-BACE-3160 with Intel Celeron J3160 Braswell (8th gen ?) 4-core CPU. Host - Ubuntu Server 22.04 latest version.
I have tried all possible settings in both Scrypted container (in transcoding, encoding, decoding) and there are two possible scenarios: works with CPU heavily loaded or no picture / no picture and momentary load on VIDEO (for a second) and a bunch of errors in the console.
I am right that this hardware should without any issues work with 8-10 cameras, without transcoding, just prebuffering for homekit or am I completely wrong and adding like 8 cameras (same spec like the one I have mentioned) likely will kill the performance of this small Brix PC? With 8 cameras, regular CPU load showed in Portainer is like 400-500%...
Is it not possible to offload in somehow using f.ex. VAAPI acceleration?
Appreciate any suggestions / explanations.