Enable keyframe recording

You can enable keyframe recording for MPEG-4/H.264/H.265 streams. It means that the system switches between recording keyframes only and recording all frames depending on your rule settings.

You can, for example, let the system record keyframes when there is no motion in the view and switch to all frames only in case of motion detection to save storage.

Select the Record keyframes only box.
Set up a rule that activates the function, see Actions and stop actions (explained).