Dahua 4MP IP Camera setting look poor

[bigredfish]

Turn OFF Smart Codec
Change compression to h.264 (Not h.265)

Now try your bitrate

 

[RDB85]

I’ve changed my camera setting to what has been suggested but when I do view 4 only two are showing? But when am viewing them the top menu says that they are all in main stream and then if I enable smart codec on one they all work?

 

[redfive]

Which NVR are you using ?

 

[RDB85]

Image of the NVR

 

[redfive]

Check its Decoding Capability

 

[RDB85]

Check its Decoding Capability

What would I need to do to change that?

 

[redfive]

You cannot change the decoding capability of the NVR, you can only adjust the FPS of your cams for don't exceed it (or use a more powerful NVR)

 

[RDB85]

You cannot change the decoding capability of the NVR, you can only adjust the FPS of your cams for don't exceed it (or use a more powerful NVR)

Right okay. I’ve lowered it to 15fps on the Main and Substream. I don’t have the option to change the Substream. Just seems odd that it display on the split screen as the Main Stream.

 

[redfive]

How many cameras do you have ? All 4 Mp ?

 

[RDB85]

How many cameras do you have ? All 4 Mp ?

I have 4x 4MP Cameras.

 

[redfive]

In theory, you should be able to get, with all AI disabled 4-channel 4MP@20 fps, with AI enabled, 4-channel 4MP@15 fps ........ from the NVR directly.

 

[RDB85]

In theory, you should be able to get, with all AI disabled 4-channel 4MP@20 fps, with AI enabled, 4-channel 4MP@15 fps ........ from the NVR directly.

I currently have the second option. It’s just odd that on the split screen it’s trying to show all on the main stream.

 

[paul@austins.tv]

It is allways wise to download the user manual for your Dahua NVR. It will hopefully explain the basic workings of the unit you have acquired. It will also hopefully explain the display options your camera views.

 

[RDB85]

It is allways wise to download the user manual for your Dahua NVR. It will hopefully explain the basic workings of the unit you have acquired. It will also hopefully explain the display options your camera views.

I will have a look.

 

[CCTVCam]

As above. Alos considering mounting those cameras lower.

 

[RDB85]

As above. Alos considering mounting those cameras lower.

I can’t mount them any lower as they are in place behind them fascia’s. Also any lower and can jut be turned.

 

[mydanielcreg_3]

TV and mobile devices. Most here run at 10-15FPS. These are not Hollywood movies we are making. The purpose is to get a clean still image. Shutter speed is much more important than FPS.

vps server germany​

 

[RDB85]

TV and mobile devices. Most here run at 10-15FPS. These are not Hollywood movies we are making. The purpose is to get a clean still image. Shutter speed is much more important than FPS.

The quality does seem to be better. I’ve not had a chance yet to have a look in the camera menu. How do you do it?

 

[Mars Bar]

You do not want to run these cameras on auto/default settings. When the perp comes by in the middle of the night, auto settings will fail you. That is not as good as it gets.

Here is my "standard" post that many use as a start for dialing in day and night that helps get the clean captures. These are done within the camera GUI thru a web browser.

Every field of view is different, but I have found you need contrast to usually be 6-8 higher than the brightness number at night.

We want the ability to freeze frame capture a clean image from the video at night, and that is only done with a shutter of 1/60 or faster. At night, default/auto may be on 1/12s shutter or worse to make the image bright.

In my opinion, shutter (exposure) and gain are the two most important parameters and then base the others off of it. Shutter is more important than FPS. It is the shutter speed that prevents motion blur, not FPS. 15 FPS is more than enough for surveillance cameras as we are not producing Hollywood movies. Match iframes to FPS. 15FPS is all that is usually needed.

Many people do not realize there is manual shutter that lets you adjust shutter and gain and a shutter priority that only lets you adjust shutter speed but not gain. The higher the gain, the bigger the noise and see-through ghosting start to appear because the noise is amplified. Most people select shutter priority and run a faster shutter than they should because it is likely being done at 100 gain, so it is actually defeating their purpose of a faster shutter.

Go into shutter settings and change to manual shutter and start with custom shutter as ms and change to 0-8.3ms and gain 0-50 (night) and 0-4ms exposure and 0-30 gain (day)for starters. Auto could have a shutter speed of 100ms or more with a gain at 100 and shutter priority could result in gain up at 100 which will contribute to significant ghosting and that blinding white you will get from the infrared or white light.

Now what you will notice immediately at night is that your image gets A LOT darker. That faster the shutter, the more light that is needed. But it is a balance. The nice bright night static image results in Casper blur and ghost during motion LOL. What do we want, a nice static image or a clean image when there is motion introduced to the scene?

In the daytime, if it is still too bright, then drop the 4ms down to 3ms then 2ms, etc. You have to play with it for your field of view.

Then at night, if it is too dark, then start adding ms to the time. Go to 10ms, 12ms, etc. until you find what you feel is acceptable as an image. Then have someone walk around and see if you can get a clean shot. Try not to go above 16.67ms (but certainly not above 30ms) as that tends to be the point where blur starts to occur. Conversely, if it is still bright, then drop down in time to get a faster shutter.

You can also adjust brightness and contrast to improve the image.

You can also add some gain to brighten the image - but the higher the gain, the more ghosting you get. Some cameras can go to 70 or so before it is an issue and some can't go over 50.

But adjusting those two settings will have the biggest impact. The next one is noise reduction. Want to keep that as low as possible. Depending on the amount of light you have, you might be able to get down to 40 or so at night (again camera dependent) and 20-30 during the day, but take it as low as you can before it gets too noisy. Again this one is a balance as well. Too smooth and no noise can result in soft images and contribute to blur.

Do not use backlight features until you have exhausted every other parameter setting. And if you do have to use backlight, take it down as low as possible.

After every setting adjustment, have someone walk around outside and see if you can freeze-frame to get a clean image. If not, keep changing until you do. Clean motion pictures are what we are after, not a clean static image.

I followed these settings and its just black. What am I doing wrong?????

 

[Hans*2]