Video Status Bar Code Analysis
<p>[TOC]</p>
<h3>I. Problem Phenomenon</h3>
<h4>1、Query phenomenon on the CMSV6</h4>
<p>When querying the video in CMSV6, there is the phenomenon of discontinuous and intermittent video, and when it is displayed by time, it is similar to the following state.</p>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=55ca53c7d1b9bb8f43a52dfd9cda3da6" alt="" /></p>
<h4>2、Query phenomenon on the MDVR Player</h4>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=dd524c310a4675c62d385f159d8b2e6b" alt="" /></p>
<h4>3、Query phenomenon on the Device Menu</h4>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=226a95d512550142bcda8cf308dd6dc4" alt="" /></p>
<h3>II. Analysis Steps</h3>
<p>The following steps can be followed to troubleshoot the causes of the problem one by one:</p>
<p>1、Check whether the device is frequently switched on and off.
2、Check whether the device ACC is frequently started.
3、Check whether the flameout delay video setting is reasonable.
4、Check the fault information of the storage log.
5、Check whether the disk speed meets the video recording requirements.
6、Scanning the disk for the existence of bad blocks.</p>
<h3>III. Operating Instruction</h3>
<h4>1、Check the switching frequency</h4>
<p>In the log query of the device, search the system log to see if there is frequent switching on and off, and compare it with the time period of the lost video to confirm whether the lost time period is the time period of the shutdown.</p>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=dd7669d4a9253824d02490f77ddab482" alt="" /></p>
<h4>2、Check the ACC start frequency</h4>
<p>In the log query of the device, search the stored log to see if there is frequent switching of ACC and compare it with the time period of the lost video to confirm if the lost time period is the same as the ACC switching time period.</p>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=4381fc563683cbd663e65a454c7db0ba" alt="" /></p>
<h4>3、Check the flameout delay video parameters</h4>
<p>Check the flameout delay video parameters to make sure that the flameout delay video is valid and the corresponding channel has flameout delay video selected. If the delay parameter is 0, or the corresponding channel is unchecked, there is no video after the flameout and before the device is turned off.</p>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=043e3a751542033c72817bd27323bf4f" alt="" /></p>
<h4>4、Check storage log status</h4>
<p>In the log query of the device, search the storage log to see if there is information such as disk failure, if the information exists, it means that the disk has abnormalities that will cause video loss. Compare the point in time when the failure occurred with the time period when the video was lost to confirm if it is consistent.</p>
<h4>5、Testing disk speed</h4>
<p>You can refer to [Disk Recommendation and Independent Selection](<a href="http://118.195.179.210:9000/web/#/11/305">http://118.195.179.210:9000/web/#/11/305</a> "Disk Recommendation and Independent Selection").</p>
<h4>6、Scan for bad blocks on disk</h4>
<p>If the disk has been used for a long time, there may exist bad blocks in some areas of the disk, causing an intermittent situation at a certain time. You can scan the disk through the PC disk scanning tool to check whether there are bad blocks, and if there are red areas in the figure below, you need to replace the disk.</p>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=080103f936fc20bf8bee68f6c9f8e6b6" alt="" /></p>
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