Motion detection with GPU instead of CPU

[lkadar2015]

Hello everybody,

Is there a way to use the GPU for motion detection instead of the CPU? I'm not into the details regarding GPU programming, that is why I'm asking and I'm not sure this is even possible, but it is worth asking.

[NickM-27]

It's not possible with Frigate, and we've explored the idea but Frigate's motion detection is designed to be very efficient so it likely wouldn't be more efficient running on GPU given the extra data transfer

[lkadar2015]

Thanks for the the quick reply!

I thought it would reduce the CPU usage a bit.

[noitman]

I have the same question with frigate . Motion detection consumes a large amount of CPU resources, Is there a plan to switch it to GPU operation? #18917

[Solear]

I understand Frigate's motion detection is very efficient. But - is there a way to set a motion-detection stream? Or is it always the detection stream?
Maybe it would make sense to:

• motion detect on sub stream
• if motion detected, run detect objects and record on a better stream.

I have the highest success with detect on my 4k-stream with 640 frigate+ model. But this is permanent stressing my CPU for motion-detection. Would it be better to detect motion on a low stream, and object detect and record on a better stream?
Thank you!

[NickM-27]

Running motion detection on the sub stream and object detection on the record stream would not make sense. That would just increase the decoding load even further as multiple streams would have to be continuously decoded. You would also have the problem that streams are never perfectly in sync so the data would be less accurate as well.

I have the highest success with detect on my 4k-stream with 640 frigate+ model.

There's always the middle ground of using 4K but changing the detect resolution to something like 1080p via the detect config.