Since 2016, live broadcast software has mushroomed, and the demand for the development of live broadcast system is also further increasing. Users are also more in pursuit of smooth and perfect live broadcast experience, which requires the development of video live broadcast system. So what steps are mainly included in the development of live video broadcasting system, and what does each step represent? The development of live video system mainly includes: acquisition, pre-processing, coding, transmission, decoding, rendering and other links.
1. Collection Due to the relatively complete functions of cameras and mobile phones, video collection is correspondingly much simpler. IOS collection is easier, android needs to do a good job of model adaptation. PC side has to face different camera drivers, so the platform construction is complicated and it is difficult to deal with problems. At present, many new live broadcasting platforms give up PC side live broadcasting. Technical personnel can adjust basic parameters according to their own network conditions and handle high-end requirements such as cache management and data synchronization to get a relatively smooth live video experience
At present, the functions of live broadcast software are very powerful. Before broadcasting, the camera can be directly called for beauty beautification Settings before broadcasting, and anchors can be located and live broadcast channels can be selected. The seemingly simple beauty actually needs a powerful algorithm to support, the algorithm is designed and optimized, and the algorithm design and optimization also rely on strong professional technology. Algorithm optimization can be CPU optimization or GPU optimization. Pre-processing also needs a lot of development and debugging work, which requires strong technology and experience support.
Three, coding coding generally use hard coding, soft coding to 720P is unlikely to be realized, can barely code will increase CPU load, causing CPU overheating. Video codec technology is also associated with cost calculation and network antagonism, and the optimal balance should be found in the design of resolution, frame rate, bit rate and other parameters. It is not practical to do the transmission by yourself. Most of them will be handed over to THE CDN service provider, which provides the bandwidth and transmission between servers. Video broadcast definitely does not want to have lag, which will increase the buffer of the video. A large buffer will increase the delay of the video, which will affect the look and feel of the video and the interactivity. Therefore, lag and delay will become contradictory.
Five, decoding like coding, decoding generally also choose hard decoding, it requires technical personnel must do fault tolerant processing, must be adapted. Soft decoding and soft coding are prone to the problem of power consumption and heating.
Rendering in computer drawing refers to the process of using software to generate images from the model. The difficulty of rendering lies in the synchronization of sound and picture. The above are the steps to develop the media module of the live broadcast system. In order to achieve a smooth and perfect live broadcast experience, it is absolutely beyond the simple steps mentioned above. There are still more things to be improved, such as system login, permission management and state management. Gift system, interactive system, message promotion, background management and so on are all directions that need to be designed and optimized. The development of live broadcast system needs to be improved and developed step by step, which requires the cooperation and continuous progress of professional and technical personnel.