Dahua NVR4116H playback too fast on dark recordings

[oh6hfx 0]

I have Dahua NVR4116H with 8 different cameras running. 3 x 4300s, 3 x HDB3200CP, 1 x HDBW4300E, and 1 x Zavio B5210.

 

I have manually set exposure settings in HDB3200CPs this way:

 

Exposure: manual

Shutter: 0-300ms

Gain: 0-80

 

If max shutter is applied during dark time, recordings are played also faster (makes sense when exposing a frame is taking longer time).

It only happens in HDB3200CP cameras recordings.

 

Any setting (other than setting exposure back auto) to prevent this? HDB3200CP is quite sensitive in dark and those exposure settings make

it lot better in dark than auto settings.

 

Johannes