AHD camera, moving objects blurry at night

Hi all,

I've got this chinese camera :

- 1080P

- Sony IMX323 sensor

- All in One : AHD CVI TVI CVBS

- 2.8-12mm lens (zoom)

- OSD menu with different parameters

Link : https://fr.aliexpress.com/item/Outdoor-2-0MP-1080P-AHD-TVI-CVI-CVBS-CCTV-camera-4-in-1-Cameras-SONY-imx323/32734292665.html

It is placed outdoor, and in AHD mode all moving vehicles are blurry at night, tested at 2.8mm and other zoom positions.

My old 540TVL analog camera has no blurry objects at night, but during the day the AHD camera is better and no blurry.

I've tried to make some setup at night (exposure, night mode), vehicles are not blury any more, but this setup is too bright during the day so it does not work 24h without any human intervention on setup.

What is the problem ?

I've got 2 cameras that have this behaviour.

One is manual zoom, the other has electric zoom.

Other specs are the same.

Should I try a fixed lens (3.6mm) to have a better aperture, and also more shutter speed ?

Please help !

Thanks

Hi what recorder format are you using ?

H264 DVR on AHD mode (1080P 12FPS)

But the problem is not the FPS because analog camera on 960H mode has also 12FPS

I have no experience with ahd systems but I can tell you that all other technologies(hd-tvi, hd-cvi, hd-sdi &ip) will look jittery ,blurry or not smooth at 12fps .that's why they make dvr's that record/display in real time 25/30fps.

Also if you are viewing your cam's at a monitor that is hooked up directly to your dvr then you will be able to see the full frame rate the dvr has to offer .

If you are viewing your cam's remotely ,ie...computer,tablet,smartphone phone then you are most likely viewing them over the sub stream which usually has even less frames per second which will make the video even more jittery,blurry or not smooth .

Sorry but FPS has nothing to do with blurry effect.

My analog camera on same DVR with 12FPS is not blurry...

Hi do you still see the blurre on playback ??

Did you install the hard drive?

Blurry is on playback, especially on still image.

Blurry is on playback, especially on still image.

Hard drive type and recorder make

What is the shutter speed set at on your cameras?

I had trouble similar to this a few months ago where a customer had these cheapie no name motorized zoom & auto focus cams. All the cams were sharp and clear in the daytime but when the ir kicked on the autofocus would drift slightly out of focus .I replaced the camera and the trouble was gone .

It is not a focus issue.

It is a zoom 2.8-12mm autofocus chinese camera with Sony board and OSD menu.

The shutter speed is set to auto.

If I set a shutter speed value OK for night, it is not blurry but during the day it is not OK.

I think the problem could be the aperture of the zoom lens, even @2.8mm.

Probably a fixed lens would have a better aperture ?

It is not a focus issue.

It is a zoom 2.8-12mm autofocus chinese camera with Sony board and OSD menu.

 

The shutter speed is set to auto.

If I set a shutter speed value OK for night, it is not blurry but during the day it is not OK.

 

I think the problem could be the aperture of the zoom lens, even @2.8mm.

Probably a fixed lens would have a better aperture ?

What are you setting the shutter to at night?

I think it was the Flicker Mode of the Shutter in the Exposure menu

I think it was the Flicker Mode of the Shutter in the Exposure menu

Shutter/exposure would be AUTO, 1/15, 1/30, 1/60.... what is yours set at?

It is set to auto. Because it is an outdoor camera, I can't set a fixed value

Here are 2 still pictures from video :

It is not the same angle, analog camera has 6mm lens, and AHD camera has zoom lens 2.8-12mm set at about 3,6mm.

Look at the car, it is blurry with AHD camera.

Especially, look at the wheels, rearview mirror and rear lights.

I've reduced the brightness and AGC of the AHD camera to have a higher shutter speed, but it seems to give no benefit.

ANALOG : https://i37.servimg.com/u/f37/16/29/02/16/analog10.jpg

AHD : https://i37.servimg.com/u/f37/16/29/02/16/ahd10.jpg

Well that is good as your going to get unless you add a lot more light or get a better camera.

If I add more light, I have the same blurry effect on moving cars or persons.

But now, please explain me why my analog camera is not blurry on moving objects ?

The analog camera is a 30USD chinese camera 540TVL with SONY effio sensor.

If I add more light, I have the same blurry effect on moving cars or persons.

 

But now, please explain me why my analog camera is not blurry on moving objects ?

The analog camera is a 30USD chinese camera 540TVL with SONY effio sensor.

Most likely Analog and AHD have different shutter speed

Can u control shutter on AHD camera?

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