This field has certain limitations when used for non-local devices.
Failure to adhere to these limitations will cause a delay in live video, irregular frame skipping, and missed events
For streaming IP cameras, do not use this field to reduce the frame rate. Set the frame rate in the camera, instead. In the past it was advised to set a value higher than the frame rate of the camera but this is no longer needed or a good idea. Some, mostly older, IP cameras support snapshot mode. In this case ZoneMinder is actively polling the camera for new images. In this case, it is safe to use the field.