Follow one person across every camera
Litmus NVR turns each person your cameras record into a card. Open the card and you see that person’s path across all your cameras in time order, without scrubbing through hours of footage.
How it works
- While recording, Litmus detects people and groups the appearances of the same person into one card, by appearance (clothing and build). Face recognition is not required.
- Open History > Cards, choose People and the time range. Each card shows a photo, when the person appeared and how many times.
- Click a card. The journey list shows one tile per stay, in time order, on whichever camera it happened.
- Click a tile to play that part of the video.
What the journey list shows
- When and where. Each tile shows the time of the stay (such as 14:02:10 – 14:05:42) and the camera name.
- How long. The duration from when the camera first detected the person until it last detected them.
- The gap between cameras. Above each tile, the time since the previous tile, such as 5m later. Overlapping times show Same time.
- Short breaks stay together. Appearances on one camera with gaps of 60 seconds or less are one tile, even across separate recordings.
When cards are not perfect
Cards are grouped automatically, so sometimes two people end up in one card or one person is split across cards. You can fix both in a few clicks.
- Someone else mixed in: select that tile and click Not this person. It moves to a card of its own.
- One person split across cards: select the cards and click Merge. When cards look like the same person, Litmus suggests merging them.
- Not a person: select the card and click Hide.
Vehicles too
Vehicles get cards the same way, and license plates can be searched even with only part of the number.
Questions
Do I need face recognition?
No. People cards are grouped by appearance, which also works from behind or at a distance. If you turn on face recognition, you can also view cards grouped by face.
Does it work with my existing cameras?
Yes. Litmus NVR connects to IP cameras over RTSP or ONVIF and to USB cameras, and analyzes the video on your own computer.
Is Litmus NVR really free?
Yes. Every feature is free with no camera limit. Live View over a direct connection is unlimited.