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H.265 web player supported by wasm technology brings a new window for security visualization and intelligence

2020-11-10 13:33:36 osc_zq2o0u6t

In the beginning , My idea is simple , That's the solution H.265 The problem of video playing on the web , Because it doesn't matter if you force the device to H.264 Or the server will force H.265 Transcoding into H.264, I think it's a kind of powerless, the more black . After more than a year, I have been on the right side of wasm Learn from , To R & D , To comprehend , More and more ,wasm The technology boundary that brings whole video front paragraph is widened a lot , If it's just a simple play , It might be just as good as it is , It's done when you reach your functional goals , But now ,wasm+AI It became our new goal ;

A long time ago , If you want to H5 End or web side display H.265 Camera video , R & D personnel need to go to the source and change the encoding format of the camera from H.265 Change to H.264, That's how to achieve H5 Visual display of the end , But it's a very troublesome problem , We spent a lot of money on the project H.265 The camera , In order to reduce bandwidth consumption and storage costs , however , When it comes to practical use , And it needs to be changed back H.264, This is obviously not a long-term solution ;

And then we tried transcoding , In the process of visualization , Dynamically H.265 Video turned into H.264, And then the large screen visual display , This is a temporary solution to the problem , But the real-time video transcoding process , Not only does the delay occur , And it consumes a lot of computing power of the machine , Especially in HD transcoding , Basically, it can't be transcoded a few ways , The machine can't hold on , therefore , This situation , And then it wasn't the solution , Although there are still manufacturers doing this ;

With the current major browsers on wasm Technical support , as well as w3c Yes wasm The standard is certain ,wasm Technology can perfectly solve the security visualization scene of H.265 Coding format support problem ,WebAssembly The characteristic of technology is the adoption of js/c/c++ The way the front-end decodes , Decode and play the real-time video , This is very consistent with the current popular concept of edge computing , It's just decoding and computing , but wasm Support for video decoding computing may be just H5 The beginning of video edge computing !

At present, our EasyNVR( Access RTSP/Onvif flow )、EasyDSS( Access RTMP Push flow )、EasyGBS( Access to national standards GB/T28181 equipment )、EasyCVR( Access to all kinds of public / Private agreements ), It's all fully supported wasm technology , Especially for H.265、PCMA/PCMU Support for equal tone video coding format !

  • More economical :H.265 The code rate is optimized in depth , Under the same quality , Comparable H.264 Save near 50% Bit rate , This will greatly reduce storage costs . Let's compare H.264 and H.265 Hundred roads 1080P One month storage cost of video , With H.264 Of 4M Code rate is an example : about 100 Road video ,H265 than H.264 Use less of the contract 62T disk space , With 4T Hard disk for example , It can save the average 15.5 Block hard disk , About us 1.5 Ten thousand yuan , The cost advantage is obvious .

  • Clearer : High definition security has become an inevitable trend ,720P、1080P Video has been widely used , and 4K、8K Super clear video has also begun to appear . The increase of video information brought by high resolution is much faster than that of network bandwidth .H.265 Coding can make up for the limitation of network bandwidth , Make super clear video easy to transfer , Under the same bandwidth condition ,H.265 It can improve the original picture quality 50%, Enhance the user's visual experience .

  • More intelligent : Support H.265 The codec chip is more powerful than the traditional monitoring chip , Based on these chips, more intelligent analysis applications can be expanded . With the great cause of heaven and earth 300W Pixels H265 Camera for example , The mixing line is integrated inside 、 The perimeter 、 The value post of the items left behind 、 Face detection 、 The crowd gathered 、 Audio and video abnormal diagnosis and other intelligent analysis algorithms ,H.265+ Intelligent analysis , Make your monitoring easier .

be based on wasm Video intelligence analysis

be based on wasm Intelligent video analysis does not mean to put the function of video intelligent analysis into H5 Go ahead and do it , My understanding is that :wasm It is a very good auxiliary means for front-end and back-end video analysis , Especially in the visual display of intelligent video analysis results ;
in addition , For the increasingly strong demand for video encryption ,wasm It also provides us with a lot of possibilities to solve problems ;

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