Verifying Watermark; Accessing Avi Files; Running Watermark Proof - GeoVision GV-IP Speed User Manual

6.4 Verifying Watermark

The watermark is an encrypted and digital signature embedded in the video stream during the
compression stage, protecting the video from the moment of creation. Watermarking ensures
that an image is not edited or damaged after it is recorded. To enable the watermark function,
see [Watermark Setting], 5.1.1 Video Settings.
The Watermark Proof is a watermark-checking program. It can verify the authenticity of the
recording before you present it in court.

6.4.1 Accessing AVI Files

To verify watermark, access the recorded AVI files by one of the following methods:
1. Use the File Save function (No. 6, Figure 3-3) to start recording on the local computer.
2. Locate recorded files on the GV-System.

6.4.2 Running Watermark Proof

1. Install Watermark Proof from the Software DVD. After installation, a WMProof icon is
created on your desktop.
2. Double-click the created icon. The Water Mark Proof window appears.
3. Click File from the menu bar, select Open and locate the recording (.avi). The selected
recording is then listed on the window. Alternatively, you can drag the recording directly
from the storage folder to the window.
4. If the recording is unmodified, a check mark will appear in the Pass column. On the
contrary, if the recording is modified or does not contain watermark during recording, a
check mark would appear in the Failed column. To review the recording, double-click the
listed file on the window.
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