Verifying Watermark; Accessing Avi Files; Running Watermark Proof - GeoVision GV-Compact DVR V2 User Manual

8.5 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], 6.1.1 Video Settings.
The Watermark Proof is a watermark-checking program. It can verify the authenticity of the
recording before you present it in court.

8.5.1 Accessing AVI Files

To verify watermark, first you can access the recorded AVI files by one of these methods:
1. Use the File Save function on the Live View window (Figure 5-5) to start recording on
the local computer.
2. Use the Act as FTP Server function to download AVI files from the GV-Compact DVR
V2. See 6.3.2 FTP.
3. Use the files recorded on the hard drive. Since the files saved on the hard drive are of
Linux file system, remember to run IFS Drives from the Software DVD to convert the
Linux-based files to Windows-based files. For the instructions, see Steps 1 to 2 in 7.2.1
Playback Using Hard Drive.

8.5.2 Running Watermark Proof

1. Install Watermark Proof from the Software DVD. After installment, 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 recorded file (.avi). The
selected file is then listed on the window. Alternatively, you can drag the file directly
from the storage folder to the window.
4. If the recording is unmodified, a check mark will appear in the Pass column. In the
contrary, if the recording is modified or the Watermark function is not enabled, a check
mark will appear in the Failed column. To play back the recording, double-click the
listed file on the window.
Advanced Applications
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