Using the Tool Menu Options

bTamper Detection (required user access level: ID2/3/4)

It is possible to appraise whether or not video or date and time information of files downloaded from DVR to external recording media has been tampered with by the following procedure.

1

Click [Browse..].

 

A dialog opens that displays a list of

 

referenced files.

2

Select the video file you want to check

 

for tampering, and click [Open].

The [FILENAME] box is populated with your specified file name.

You cannot load a video file (.mp2) unless it is stored together with the index file (.idx) of the same file name in the same folder.

3 Click .

The system starts checking the video file for any altered frames. During this process, the progress bar in the dialog shows the status.

 

 

 

To cancel the process in progress,

4

 

 

click [CANCEL] on the dialog.

 

 

 

 

 

 

Review the results of tamper

 

detection.

If no altered frames are detected: The “No altered frames are found.” message appears in the dialog.

If altered frames are detected:

The [ALTERED] window appears that lists the time stamps of the altered frames. You can display any altered frame by clicking the corresponding row on the [ALTERED] window.

Click [Previous] or [Next] to move the selected row up or down on the [ALTERED] window and automatically switch the altered frame.

To display an altered frame, click the corresponding row.

If tampering of date and time information is detected:

The “Found time-stamp is altered.” message appears in the dialog.

Tampering of date and time information can only be detected when the DVR from which video data was downloaded is DSR-M810(P)/DSR-M814(P) and the firmware version is 2.30-00 or higher.

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Sanyo VA-SW8000LITE instruction manual Tamper Detection required user access level ID2/3/4

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