Video and audio streams are recorded synchronously.
Binding a camera to an archive determines the archive to which a video stream will be recorded and how.
You can bind a single camera to an archive or bind a group of cameras by using the same settings.
To bind a camera to an archive:
In the Depth, days field, specify a video footage retention time value for the given camera in days (3). Zero value means unlimited retention.
Attention!
If your footage archive includes videos from one or more cameras with unlimited retention, the archive will run out of free space at some point, and FIFO based re-recording will be automatically started regardless of retention time settings. In this case, we cannot guarantee that the actual retention time settings will be preserved for other cameras.
Therefore, if you set unlimited retention time for at least one camera, you may find it pointless to limit retention time for other cameras.
To avoid retention time collisions between cameras, please make sure to provide enough storage capacity for your footage archive (see Disk storage subsystem requirements).
Attention!
Further, if you are increasing the available archive retention time, or setting the parameter to 0, please note that this setting may be not applied to earlier records. Older footage falling outside the initial retention time may become inaccessible.
Note
When setting a retention time parameter for a particular camera archive, please note that global retention time limits have higher priority (see Configuring access restrictions to older footage).
If your entire archive is set to, say, 10 days, and the camera retention time is set to 20 days, camera footage will be actually retained for 10 days only.
In the Prerecord, sec field (4), enter the buffering time of the video stream from the camera in seconds. This value should be in the range [0, 30].
Note
Prerecord is the period of pre-event recording that will be added to the beginning of an alarm event recording.
Attention!
If a macro starts recording, the prerecord time may be longer, according to your settings (see Record to archive).
If you want to record pruned, decimated video, choose By keyframes from Recording frame key only (5). This applies to all video streams except MJPEG. With MJPEG codec, please use the explicit value of frame rate. Video pruning by frame dropping reduces the size of recorded video and saves storage, but video with skipped frames feels like the movement is delayed, and motion feels more choppy.
Attention!
When you prune by frame dropping, in all video streams except MJPEG, only I-fames (Intra-Coded Frame or Key Frames) are saved. Different codecs feature various compression levels with key frames rates going down from 3 to under 1 I-frames per second.
MJPEG video contains only I‑frames (Intra-coded pictures with a complete image), so it makes sense to set a desired frame rate here.
In the Camera stream field select a stream for archive recording (6).
Note
This setting is relevant for cameras that support multistreaming.
Binding of the camera to the archive is now complete.
To bind multiple cameras:
The camera is now bound to the archive.