Sanyo VA-SW8000 User Manual download pdf (Page 73)

English 72

Using the Tool Menu Options

b Tamper 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.

Click [Browse..].

A dialog opens that displays a list of

referenced files.

Select the video file you want to check

for tampering, and click [Open].

The [FILENAME] box is populated with

your specified file name.

Click .

The system starts checking the video file

for any altered frames. During this

process, the progress bar in the dialog

shows the status.

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.

• If tampering of date and time

information is detected:

The “Found time-stamp is altered.”

message appears in the dialog.

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.

To cancel the process in progress,

click [CANCEL] on the dialog.

Click [Previous] or [Next] to

move the selected row up or

down on the [ALTERED]

window and automatically

switch the altered frame.

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.

To display an altered frame, click the

corresponding row.

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Sanyo VA-SW8000 User Manual Page 73

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