Easynvr shows that the channel is online but cannot be played. Troubleshooting (non video streaming)

Many users have encountered EasyNVR The video channel is online but cannot be played , There are many reasons for this problem . Through the investigation of various projects, we can sum up , Most of the time , This problem is caused by the problem of the original video stream , But if we can't find the problem from the video stream , It's time to check from other aspects .

In a project , The user encountered a video channel online , But the problem of not playing , Ask us for help . We first checked the system log , After searching the log, it is found that the stream is connecting state , When the backend listens for event status, it does not listen connecting state , Added monitoring connecting After the status code connecting All channels in the state are offline ：

But this is just connecting Will become offline , In the actual test, it is found that some streams often break and reconnect in a short time , Switch back and forth between offline and online , So we need to change it to connecting Those that can be connected immediately do not display offline .

The logic is changed to judge for three consecutive times connecting Set offline , Reset the number of times to as long as other states occur 0, Write as follows ：

Later, it was found that there was a simpler and more accurate way , This is to call back and set offline if an error is encountered when opening the stream , The streams that can be opened correctly are online streams ：