Shulou(Shulou.com)06/02 Report--

QuestMobile2020 data show that since the outbreak, the amount of time each netizen spent on the mobile Internet per day has increased by 21.5% compared with the beginning of the year, especially for video applications. The number of short video users has exceeded 850 million, and the number of users has reached 10.5% of the total time used by mobile Internet users, second only to social networking and long videos.

We have reached the era of video +, and video is becoming a basic capability:

First: video has become the mainstream way of information transmission and interaction, from the earliest words to pictures, and then to the present video, video is more and more closely related to our study, life, work and entertainment.

Second: with the continuous emergence of live video, short video, VLog and other forms, video has quickly and comprehensively penetrated from a feature originally unique in the field of pan-entertainment to vertical industries such as education, finance, e-commerce, information, health and so on. Video is closely integrated with business, giving birth to a better form of business value communication.

Third: the continuous development of interactions such as 4K, 8K, VR, AR and MR, the promotion of AI and 5G new technologies, and the deep integration of video and cloud computing provide users with a smoother, higher definition, more real-time and more realistic experience, and users are increasingly dependent on video.

But video is a special area, and enterprises will face a series of challenges if they want to build video applications from zero to one:

First, there is a large investment in resources in the early stage, and the consumption of computing resources such as bandwidth, traffic, storage and so on is much higher than that of other Internet services, which requires a lot of money to build infrastructure.

The second technology threshold is relatively high, distributed storage, computing, video codec, video encryption and high concurrent smooth playback, the whole process involves multiple technology stacks, which requires very high technical capabilities of the team.

The third is that the operating cost is relatively high, video is unstructured data, in the face of massive video, especially short video business, involving media assets management, audit, editing and other processes, these work will cost a lot of manpower.

So how to solve these problems?

Aliyun has launched an one-stop solution for video-on-demand, which integrates audio and video collection, upload, automatic transcoding processing, media resource management, efficient cloud clip processing, distribution acceleration and video playback, and integrates the reliability of OSS object storage, large-scale video processing capabilities, Aliyun AI technology and strong CDN distribution capabilities to provide end-to-end video full-link services. When using it, customers do not need to consider storage and bandwidth bottlenecks, use on demand and pay by quantity, which is a very good way to control costs and quickly build video-on-demand capabilities for applications.

The overall structure of Aliyun Video on demand

PGC videos, UGC short videos (such as Douyin and Kuaishou short videos) and live recorded files. These video resources are uploaded to the cloud, and the video processing is completed in the cloud, including media asset service, media asset management service, video content security review, video transcoding and other links. Then the content is distributed through Aliyun's CDN and finally played on the user terminal. The entire service covers the entire life cycle of video from production to consumption.

Video production

For customers who need to add a short video feature that allows users to shoot, edit and publish in the application, Aliyun

SDK provides product-level short videos. Through SDK, you can quickly realize the functions of mainstream short videos, such as recording, import, clipping, variable speed processing, beauty filter, filter, transition, stitching, etc., as well as some advanced features, such as face reduction, dynamic sticker, mv effect and so on. Because SDK UI is highly simulated and open source, customers can easily customize it according to their own business scenarios and quickly launch APP.

Media assets management

Media asset service, that is, to provide corresponding management and application for video content, including media file management, meta information management, data service. As the content generated by the UGC scenario is mixed, the content of the UGC needs to be reviewed by AI to ensure the compliance of the content. VOD service can provide rapid identification and feedback on pornography, anti-terrorism, violent terrorism and advertising content, reduce the cost of manual audit and improve audit efficiency.

The DNA of video is video fingerprint, that is, using the technology of DNA to mark a video, it will not change with the format conversion, clip splicing and compression of video files. In short video scenes, video DNA can be used to do original identification, content duplicate checking, and copyright protection. For example, if the newly uploaded content matches the DNA of the copyrighted content in the content library, you can mark the newly uploaded content and let the customer decide what to do with the content.

For the list cover images of the content in the application, the traditional method is that the operator takes screenshots manually or makes them separately. For large amounts of short video content, the cost is very high. If there is no manual participation, the display effect may be very poor (such as fuzzy, non-critical content) through system screenshots. Under the inertia of users watching the title and the cover, the video click rate will be reduced. The intelligent first image technology of video-on-demand can automatically generate the cover image by selecting the most attractive frame through the aesthetic AI model. Through the manual evaluation of various business parties, the defective rate is as low as 0.71%, and the processing time is increased by 6 times.

Media transcoding

The most important link for video in the cloud is media processing, which in popular terms is video transcoding, that is, converting multimedia data into media formats suitable for playing on the whole platform and terminals and adapting to different network conditions (such as Blu-ray, HD, SD) in the transcoding process, as well as increasing the watermark or video encryption required by the business.

In the transcoding service, Aliyun provides unique transcoding technology-narrowband HD, which intelligently analyzes every scene, action, content and texture in the video to ensure that the bit rate is lower under the same video image quality. in order to reduce storage costs and playback costs, in large-scale application video scenarios, the cost savings are very obvious.

Message notification

When uploading, transcoding, waiting for video AI processing, screenshot and other corresponding services are completed, the VOD platform has the corresponding message notification to facilitate the business layer to respond immediately and deal with the corresponding business processes.

Video distribution and playback

After the cloud processing is completed, the last step is playback. The playback here includes two layers. The first is the edge distribution of video content. Based on Aliyun's 2800 + nodes all over the world, the video content can be played smoothly. The second VOD service also provides SDK for multi-terminal playback, which not only supports basic playback capabilities, but also deeply integrates the business of Aliyun Video Cloud, such as support for encrypted video playback, secure (encrypted) download, definition switching and other capabilities.

The above is the full link service of video-on-demand from production to consumption. There is also a very important point here, that is, content security. For content security, VOD provides access restrictions, authentication of rights in the playback center, video encryption, secure download, multi-dimensional protection of video access security and protection from piracy.

On the whole, VOD includes short video solutions, covering end-to-end, cloud-to-end integrated solutions. Using this system, enterprises can build VOD business simply, at low cost and quickly, and open up a new track for the business.

The above content is selected from the LVB sharing of Aliyun VOD senior product experts on June 10. You can go to the following link "Video bold era, how to quickly build VOD capability?" "View the full content:

For more information about how to use VOD, please click to view the video details.

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