We know that CDN / bandwidth is one of the main costs of the video industry, and the emerging CDN manufacturers represented by Yunfan has always provided higher value, reducing bandwidth costs, and continuously carrying technical breakthroughs and patterns. Innovation. Its CDN + P2P fusion programs launched last year can reduce the cost of more than 50% or more, which is understood that it is more than 15 million bandwidth costs for a customer annual capital. As a CDN service provider, it does not want to make the customer to consume more traffic, but to reduce the bandwidth to make the proposal, its founder and CEO, Yong Yue, have repeatedly emphasized that Yunfan has hoped to make the video operation enterprise cost more reasonable Let more budgets are used to refine operations or launch better content, rather than being tied by CDN, do not dare to develop.
Recently, it announced that it solves the live broadcast of H.265 real-time codec, transmission, and launches a full H.265 video live transmission solution. Enterprises use their CDN to support H.265, which is convenient and fast, can reduce bandwidth by more than 30%.
What is H.265 standard
Now the requirements of the user's quality of video are also increasing, HD, 4K, etc. have become the mainstream development direction of current video services. The improvement of video clarity brings a substantial growth of the data, and the existing coding standards (such as H.264, MPEG-2, etc.) have difficult to synchronize, so many in existing network environments. Quality video has to reduce quality standards, use a variety of ways to reduce the code rate, sacrifice quality change.
In this context, the market calls for a new video coding technology capable of providing higher compression ratios to meet the development of the current video service, H.265 (standard full name "high-efficiency video code high effect video code) video coding standard pregnancy. H.265 is intended to transmit higher quality videos in a limited bandwidth environment, only about half of the bandwidth, you can play the same quality video. This also means that in an existing network environment, online video viewing will be more smooth, and companies will also pay less bandwidth costs, better video (HD, Ultra HD 4K) will also get closer to us.
The H.265 standard is used along a mixed encoding frame similar to the H.264, but on this basis, H.265 has a large number of technological improvements, including representative: based on large-size quadrushing structure, more Angle intra prediction technology, motion estimation fusion technology, adaptive motion vector prediction compensation technology, loop filter, entropy coding technology.
H.265 has excellent network adaptability, parallel processing capabilities, compression efficiency, but H.265 has increased by 2 to 10 times compared to H.264, and the real-time encoding of H.265 is added more. High requirements, although there are video platforms such as Iqiyi, LeTV and PPTV announced support for H.265 HD video playback, but the current H.265 standard has not yet realized large-scale popularization in the video industry, while mobile devices still have real-time codec, The H.265 standard is less common in the field of live broadcast. Many CDN vendors represent H.265 in publicity, but few have a complete solution.
Yunfan accelerates full considering the status of the customer's existing equipment network and the future expansion capabilities in the system. The first video live encoding code combined with the existing H.264 in China, the transport acceleration solution: H.264 encoding Lifting --> The cloud turns h.265-> Transmission H.265 code stream -> Terminal solution H.265 play. Compared to other manufacturers, the H.265 live broadcast transfer program (H.265 code live ->65 decoded viewing) is more convenient and more capable of ensuring video quality. Because the H.265 encoding is large, it is not possible to high quality encoding in real time, so it can only be shallowly encoded, resulting in poor picture quality, can be said to be a castration version of the H.265 program, did not reflect H.265 high The quality of the low bandwidth is characterized.
Yunfan accelerates H.265 program
A. The high-definition H.264 live broadcast video stream is still used in the soil flow, and the high-definition code rate flows to solve the high-definition rate of high-definition code can be used to speed up the SDK;
B. Cloud transfer code, H.264 video stream enters Yunfan accelerated live cloud server, turn on the real-time transcoding of H.264 to H.265, can output H.264, and H.265 live stream, support H .265 screenshots, H.265 Record FLV, MP4 for subsequent on demand.
CH264 \ H.265 decoded playback, via cloud rotation platform, and output H.264, H.265 Different video streams, distributed through cloud sails to the terminal, through a certain agreement specification, CDN can achieve intelligent identification and Respond to video resources in different encoding formats. Support for H.265 video andRoid, iOS, and OTT clients can access H.265 video, clients that do not support H.265 video, the Flash side can access the original H.264 stream playback. For H.265 decoding SDK, the enterprise can use the open source H.265 decoder published on the network, or you can use Yunfan H.265 to decode SDK. We optimize multiple technologies to reduce the occupation of CPUs. , Reduce the heating of the phone.
Difficulties: Real-time transcodation, H.265 encoded algorithm complexity compared to H.264 increased by 2 ~ 10 times, real-time code difficulty, Yunfan accelerated optimization achieved breakthrough, support single server to turn 100-128 Road H.265 live stream, 30% -50% compared to H.264 compression ratio.
Program advantage
1. Use cdn to support H.265 convenient and fast
Since the equipment used in the market is now supporting H.264 format, the real situation cannot be upgraded immediately, but in order to play the low code stream of H.265, high quality technical features, transfer this process in the middle With the H.265 encoding standard, through a compilation, transcoding process, high quality video signals are transmitted in low code flow, and the high quality picture is still retained, without affecting the existing H.264 system, New and old technologies are compatible with each other and completely dock. Enterprises use Yunfan accelerate CDN to implement H.265 transmission live broadcast, convenient and fast.
2. Reduce costs
The cloud transfer code realizes the H.264 real-time turn H.265, the compression ratio is approximately 20-50%. Overall, the original video quality can be maintained during the transmission, reducing nearly 30% of the bandwidth, saving the company with wide cost.
Summarize
At present, H.264 is very mature, H.265 encoding is large, can't make real-time quality coding, and H.265 does not decode does not have CPU bottleneck, using push H.265 and existing H.264 phase The combination is implemented using Yunfan accelerated CDN to support H.265 without changing other systems, which is convenient and fast. With the upgrade of hardware, technology, I believe that the next five years or even ten years, H.265 is likely to be mainstream.
Related resources: H.265 HD Wireless Tominal System Design - Live Technical Documentation Resources
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