No Video Problem
<p>[TOC]</p>
<h3>I. Problem Phenomenon</h3>
<p>Device access to the disk, but can not record, the display does not show the video red dot.</p>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=b08ec1a2787a5f5063e98cbcb144d932" alt="" /></p>
<p>Web-system status page-Record status is 0.</p>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=befed51213c1c2b76dfabf47516a67fe" alt="" /></p>
<h3>II. Analysis Steps</h3>
<p>The following steps can be followed to troubleshoot the causes of the problem one by one:
1, Check whether the video input is normal.
2, Check the video parameters settings.
3, Check the status of the disk.
4, Check if the SD card is in write-protected status.
5, Whether the disk speed measurement is meets the video needs.
6, Scanning the hard disk for the presence of bad blocks.</p>
<h3>III. Operating Instruction</h3>
<h4>1, Check whether the video input is normal</h4>
<ul>
<li>
<p>Check whether the video input has an image, there is a display device, through the display to view the preview of the channel, whether the image is normal. Part of the equipment without display, connect the preview through the APP to confirm whether there is an image. If there is no image, please check whether the status of the camera is good, whether the camera has been powered, and whether the camera resolution, standard, etc. is consistent with what the device supports.</p>
</li>
<li>Check whether the device has Flash screen, splash screen and other phenomena. If the problem exists, you need to replace the camera to check whether it is caused by the camera. If the problem also exists without the camera, you need to restore the factory settings, and then observe. If there is still a problem, the device may have a hardware failure.</li>
</ul>
<h4>2, Check the video parameters settings</h4>
<p>video parameters settings can be specifically referred to [Launch Video](<a href="http://118.195.179.210:9000/web/#/11/260">http://118.195.179.210:9000/web/#/11/260</a> "Launch Video") section.</p>
<h4>3, Check the disk status</h4>
<ul>
<li>
<p>Whether the disk is normally identified, if the disk is accessed, the status display does not exist, you need to confirm whether the disk is normal, you can replace the disk to confirm again.</p>
</li>
<li>Whether the disk status shows normal, if the status shows error, etc., the disk partition format is incorrect or disk failure, you need to wait for automatic formatting or choose manual formatting, and then observe whether it can show normal.</li>
</ul>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=182c54a1300ebbbc244efd658517057b" alt="" /></p>
<ul>
<li>The partition information of the new disk is not consistent with the one required by the device video, when accessing the new disk, the device will handle it cautiously and will automatically format the disk after powering up and down the disk several times and confirming it as a new disk, the process needs to last about 2~5 minutes. You can also choose to format the disk manually to achieve quick use of the disk.</li>
</ul>
<p><img src="http://118.195.179.210:9000/server/index.php?s=/api/attachment/visitFile&amp;sign=5568defd74f1617c0330635aa5aab423" alt="" /></p>
<h4>4, Check if the SD card is in write-protected status</h4>
<p>When the SD card is in write-protected status, no data can be written, resulting in no video recording. You can access the disk to the computer, right-click on the disk and then select "Properties", look at the file properties of the three read-only, hidden and archive, see if the check mark (√) on the "read-only" (example: √ read-only) if this proves that it is indeed write If this is the case, it proves that it is indeed protected by write, because in normal state, all three items are not ticked.</p>
<h4>5, Does disk speed measurement meet video needs</h4>
<p>Disk speed can not meet the video recording requirements, there will be frequent stop video phenomenon, 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") section.</p>
<h4>6, Scan the hard disk for bad blocks</h4>
<p>If the disk has been used for a long time, there may be bad blocks in some areas of the disk, causing a certain period of time to appear intermittently. You can scan the disk through the PC disk scanning tool to check whether there are bad blocks, if there is a red area 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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