At present, there are too many companies using audio and video technologies in the market, ranging from short videos to the whole people watching live broadcasts, and the time spent on mobile phones is occupied by video. The domestic audio and video industry can be divided into three categories.
First type short video
Short video platforms such as Douyin, Kuaishou, and Weishi use a lot of audio and video technologies, mainly video content, and have high requirements for video compression. Try to make video files as small as possible while ensuring high definition.
The second type of live streaming
Jingdong, Taobao; Douyu, Huya, etc. brought live broadcasts to a climax. The former focuses on live broadcasts to bring goods, and the latter focuses on live broadcast consumption. The technical requirements are as follows: live broadcasts start in seconds, low latency, and on weak networks It is guaranteed to watch the live broadcast normally in the environment
The third type of instant messaging
For example, mobile QQ, WeChat, Xunlei, etc. mainly use webrtc audio and video calls, and there are a large number of other niche apps for establishing p2p calls , which are not listed here.
In the current environment, if apps are only displayed in graphics and text, they are far from meeting the needs of users . In the process of 5G popularization, such apps will become less and less, so companies are constantly The transition to audio and video will inevitably spawn a large number of audio and video jobs
Short video live broadcast and audio and video calls are a new way of expressing information. It combines voice and video, which can more intuitively and three-dimensionally meet the expression and communication needs of users, and meet the demands of display and sharing among people.
In recent years, short video live broadcasts and calls have shown a blowout development. Regardless of the business, bandwidth constitutes most of the cost. Video itself consumes bandwidth and capacity. It is conceivable that under 4K or even 8K video, bandwidth costs may increase exponentially. The future video platform may not be able to bear the dilemma of high bandwidth costs. So saving bandwidth has become an important demand point.
How to save broadband costs without affecting the original business? Starting from video encoding, the previous use of H264 for encoding has the disadvantages of low compression, unclear quality, and too large encoded video files. H265 solves these pain points very well, which is why hardware manufacturers like despise cameras Often under the banner of supporting H265 encoding, he is a big selling point. There are many other manufacturers that are also popularizing H265, such as: NetEase Cloud, Tencent Cloud...
What are the advantages of H.265?
Video compression is more outstanding, and the compression efficiency is doubled compared with H.264
The new H.265 encoding method effectively improves the video compression rate, and only needs half of the original bandwidth to play the same quality video. As we all know, the bit rate of video coding can be flexibly controlled based on the same video quality. Compared with H.264 coding technology, H.265 coding technology can reduce the video capacity by about 39-74%, and it can also obtain better than H. 264 video has a better and clearer effect, which makes H.265 in the same volume and bit rate, the fineness of H.265 picture quality is doubled.
In 4K 8K video, only H265 can do better. If you want to engage in audio and video work in the future, you must learn H265. So, how do we learn?
From the above knowledge points, you can see that there is still a lot to learn to get started with audio and video. Especially the basic principles of audio and video are the most important, otherwise you will not be able to answer simple questions such as when you go to an interview and ask you why you have a blurry screen, why you have a freeze, and how to open it in seconds.
In order to help everyone learn audio and video development technologies faster and better, I specially collected and compiled a set of "Advanced Audio and Video Materials" from three senior architects from Huawei, OPPO, and Alibaba, and shared it with everyone for free. Friends who need it can [Join here to get it in free package]
At last
In the involved Android market, the survival of the fittest is the eternal rule. Only by making a career plan and improving yourself in advance can you have your own core competitiveness in the future.
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