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When the EasyNVR platform is cascaded to the EasyCVR, why can't the video be played after a while?
2022-07-30 03:45:00 【EasyCVR】
TSINGSEE Qingxi Video's platform (EasyGBS/EasyNVR/EasyCVR) can support the cascade function. The platform can be cascaded to the upper-level platform through the national standard GB28181 protocol, or it can be used as the upper-level platform to allow the lower-level platform to cascade through the national standard GB28181 protocol.The cascading function is very important in security and other scenarios. It can realize the interconnection and sharing of data, flexible scheduling, break the data island of the system, and allow information to be efficiently exchanged.
According to user feedback, when EasyNVR is a lower-level platform, when cascaded to EasyCVR, EasyNVR platform can play video content normally, but EasyCVR cannot play video normally.
In response to this situation, the technical personnel immediately checked the package by capturing the package.Today, I will share the troubleshooting and solution process.
1) Analyze the reasons by capturing packets at the upper and lower levels together.
Lower level packets:
Superior Packet:
It is known from the information of the upper and lower data packets that when the upper platform EasyCVR requests to play, it will send an invite request.Check the upper-level and lower-level information in the data package for comparison. In the data package of the lower-level EasyNVR platform, it is found that when the flow is requested, the lower-level has already sent the flow, but in the upper-level data package, the flow has not been sent.
2) So we checked why the superior EasyCVR platform showed no streaming.First check the inbound port (UDP 50426), and then check whether the public network inbound port is open. At this time, it is found that only 30 public network inbound ports are open for UDP, and the range is 50000-50030.
3) From the platform configuration, it can be seen that the inflow range of the UDP port is 50000-50500, then the problem is clarified here.Because the upper-level EasyCVR platform requests playback ports randomly, and only 30 ports are open, no streams are received in the upper-level packet capture.Change the UDP port range to 50000-50030, and the EasyCVR platform will resume normal playback.
TSINGSEE focuses on the research and development and expansion of video streaming media technology. At present, it has launched a variety of video platforms for the market, such as EasyCVR, EasyGBS, EasyDSS, EasyNVR, etc., which can realize multi-type device access and multi-protocol support, multi-format video stream output, multi-terminal platform compatibility, the platform can be applied in scenarios such as smart construction sites, smart campuses, smart factories, smart water conservancy, and smart communities.Interested users can go to the demo platform for experience or deployment testing.
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