30fps sub-stream on DS-2CD2042WD-I and others...

[Moonshine]

Hello..

I've been installing a variety of HIKVision cameras at home, but curious about sub-stream performance on some. For some reason my 4MP cams like the DS-2CD2042WD-I (v5.3.8) seem to have a max sub-stream frame rate of 15fps where other cheap cams like my 3MP DS-2CD2432F-IW (v5.3.0) can do 30fps. Just seems like an odd limitation but I guess that's just the case?

When I ssh to the DS-2CD2042WD-I cams they seem to have plenty of cpu left (running at like 12% with my 1080p main stream), although maybe the stream processing is done with other encoding chips I guess.

Anyway, just curious if anyone has any insight here. I'd like to run all my sub-steams at 30fps for a nice smooth multi-view display, but it's looking that that will be impossible with what I have currently.

Thanks...

 

[Del Boy]

You can set it to 20fps on the DS-2CD2042WD-I

They should run 3MP @ 30fps, but why? 20fps is plenty. 15fps is a sweet-spot if you need lots of storage and 25fps is real-time.

 

[Moonshine]

You can set it to 20fps on the DS-2CD2042WD-I

They should run 3MP @ 30fps, but why? 20fps is plenty. 15fps is a sweet-spot if you need lots of storage and 25fps is real-time.

Well I'm talking about the sub-stream here (used for live multi-views), not main-stream (which I'm recording). Sub stream frame rate options on the DS-2CD2042WD-I seem to max out at 15fps for me:

 

[Del Boy]

Sorry, mis-read that. Let me check mine. I know the 3MP cameras are better for substream.

 

[eckirchn]

I have the same question. IMO the DS-2CD2042WD-I is crap compared to the older DS-2CD2032-I. I am much happier with the 2032. I think the image is cleaner both day and night with the 2032. My firmware:



I attached how I rip both my cameras and both sets of streams. The top two windows are the 2032 and the bottom two are the 2042.

 

[tr098a]

What resolution does the 2042 support on the sub stream?

the 2032 does 704*576 @ 25FPS max