2018 Tmall Double 11 has passed a week, various express delivery is also racing to the hands of everyone. However, for the people who cut their hands off, Tmall Double 11 is not only a simple sense of “buy buy buy”, but also a carnival feast while watching and playing.
As a must-have program of Double 11, this year’s Cat Night was broadcast live online and on TV through Youku, Zhejiang TV and Dragon TV, attracting more than 240 million viewers around the world. During the cat-night period, Youku, based on the latest broadcast level highly reliable live program of Ali Cloud, brought ultra-high DEFINITION and smooth viewing experience to nearly 25 million viewers.
You must remember that during the World Cup in Russia this year, Ali Cloud contracted 70% of the live streaming traffic of the whole network. In fact, this cat night broadcast solution brought new capabilities, such as introducing 4K and intelligent video production technology for the first time, which further improved the viewing experience.
/ Full link support /
1. Aliyunvideo cloud live broadcast service provides full-link technical support and guarantee from uplink, cloud content reproduction to distribution for this year’s Cat-night live broadcast, and the whole live broadcast system achieves broadcast-level stability.
2. The uplink adopts multi-network access and video stream merging functions to ensure high availability of the uplink.
3. The video processing center adopts remote multi-center and multi-machine room deployment, that is, a live broadcast channel is processed through the live broadcast cluster in multiple areas at the same time. Any failure in one area can be quickly switched to a new area to avoid interruption and ensure high availability of video processing.
Ali Cloud CDN is used for global live broadcast distribution, benefiting from the CDN system’s traffic prediction and real-time scheduling system for sudden events, ensuring smooth video playback.
When the continuous image changes more than 24 frames per second, according to the principle of visual persistence, the human eye sees a smooth and continuous visual effect, which is not enough if a higher resolution experience is required.
In the process of cloud content processing, live transcoding covers the resolution from 360P to 4K ultra high definition, and applies the “50 frames” technology used in the World Cup, that is, the frame rate reaches 50 frames per second, which is about two times higher than the current 25 and 30 frames of online video. The most obvious manifestation is that the details of the star’s facial skin can be clearly seen.
In the process of reaching users, relying on CDN’s 1500+ node distribution network around the world, accurate traffic prediction and real-time intelligent scheduling are carried out to ensure the speedy and accurate distribution of content to users.
/ THE first large-scale application of 4K ultra HD and intelligent video production /
As an important indicator of user experience, video sharpness is also the focus of the technical team. 4K has been applied for the first time in this cat night. Aliyun provides real-time 4K live broadcasting service, which can process 4K ultra HIGH DEFINITION and high frame rate videos in real time, and the overall picture quality has been greatly improved.
1. In 4K video processing, the live broadcast service uses GPU for video processing and transcoding on a large scale, which greatly improves the real-time video processing capacity and ensures the highest 4K HEVC real-time transcoding of live video. Li Bin, head of Aliyun’s live streaming service, said the 4K HD capability is not only used in singles’ Day, but also widely used by game livestreaming customers.
2. In terms of intelligence and efficiency, video intelligent production is also the first large-scale application in singles’ 11 live broadcast. For example, ASR technology is used to automatically recognize live subtitles and provide real-time subtitles service for Qianiu Toutiao live via cloud broadcast. Ali Cloud video intelligent product matrix also includes video intelligent audit, video DNA, video multi-modal content understanding, intelligent cover, intelligent vision, etc., is committed to enabling intelligence to the complete link of video production, transmission and consumption.
3. Aliyun Edge Node Service (ENS) also joined the escort camp of Double 11. On Hantao, ENS has built an ultra-low delay interactive live broadcast network. Facing the traffic peak of Double 11, ENS can achieve ultra-low cost, fast, safe and reliable elastic expansion. At the same time, the deep combination of video capabilities and edge computing can also directly sink video analysis and computing business to the edge, creating greater value for customers.
It is worth noting that overseas, Aliyun Video also provides exclusive live broadcasting solutions for Lazada, the largest B2C platform in Southeast Asia, helping Lazada push the Singles’ 11 gala to Thailand, Malaysia and other countries, allowing consumers in Southeast Asia to participate in the singles’ 11 carnival through entertainment, fun and interaction.
Ali Cloud video cloud general manager Shu Du said,
After the baptism of double 11, Aliyun video cloud has developed into a super-scale media processing and distribution platform connected to 1 billion devices every day. In the future, relying on the scene CDN content distribution and edge computing technology, intelligent video analysis, HD transcoding and other capabilities will be reduced to within 10 kilometers of users, which creates conditions for users to upgrade their visual experience. Ali Cloud will continue to build video services with lower latency, higher clarity and more intelligence to create more value for customers.
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