Reasonable cpu loading with two 8 mp cameras?

[RubberDucky]

Hi,

I'm getting 70% cpu loading with only two 8MP cameras (hfw1831E) running at 20 fps (330mp/s).

Seems high but I'm trying the demo version. I've seen the comments on past demo versions about high loading, do we know how v5 demo behaves in this regard? I ask because direct to disc appears to be working given that turning it off pegs the loading to well over 100%.

Anyway, I'm using a dedicated PC (i5-8400 with 2x8gb ram writing to 1TB Sata drive with a 50" 4K monitor) and am not sure what would be a reasonable expectation for the licensed version.

Thanks.

 

[fenderman]

It’s the demo and the 4K monitor.

 

[RubberDucky]

OK, thanks. Didn't think about the effect of the 4k monitor. Minimizing the GUI drops the loading down to 22% (from 70%). Wow.

Does the "limit live preview rate" refer to the limit on each camera stream? Help file doesn't say and I found no posts on the subject. I ask because any value less than about 35 fps starts making a difference on cpu loading even though none of my cameras run faster than 20 fps! Seems odd to me but maybe it makes sense to someone.

 

[RubberDucky]

So....the licensed version dropped the cpu loading by about 7% across the board (to about 63% with GUI open). Changing "scaling" to Fast (from Bilinear) reduced further down to about 43%.

Some investigating indicates base loading for streaming/decoding one camera is about 7% cpu and 9% gpu. Recording (direct-to-disc) is negligible. The second camera doubles those numbers. Activating the 4K GUI adds the remaining 30% cpu loading.

Yup, displaying 4K cameras on a 4K monitor takes a boatload of processing power.