There are many technical difficulties used in the development of the source code of the live broadcast system, such as video and audio processing, graphics processing, video and audio compression, CDN distribution, instant messaging and other technologies. Each part contains a lot of technologies. Such a difficult task has not been a few years. A solid technical foundation is difficult to accomplish.
1. A complete set of service modules for the source code of the live broadcast system include:
1. Chat system: including chat room functions, barrage, and private chat;
2. Gift system: gift sending and receiving, gift graphics;
3. Statistics system: clicks, Revenue and traffic statistics payment system: recharge, cash withdrawal, revenue exchange;
4. Security system: real-name authentication, screenshots, automatic pornography, recording, playback, and ban;
5. Operating system: provide a live broadcast program mobile phone live broadcast source code system development tutorial .
The above functions are the most basic functions that the live broadcast platform should have. If you want to apply the live broadcast platform to market segments, you need more special features to support it.
2. The general process of audio and video processing:
data collection → data encoding → data transmission (streaming media server) → decoding data → playback display
1. Data collection:
cameras and pickups collect video and audio data, and the original data is obtained at this time.
2. Data encoding:
Use relevant hardware or software to encode (digitize) and process the original audio and video data (such as audio and video mixing, packaging, etc.) to obtain usable audio and video data.
3. Data transmission:
The audio and video data after encoding is transmitted. Early audio and video were transmitted through cables such as coaxial cables. After the development of IP networks, IP networks were used for optimal transmission.
4. Decode data:
Use relevant hardware or software to decode the received encoded audio and video data to obtain images/sounds that can be directly displayed.
5. Play display:
In the monitor (TV, monitor screen, etc.) or speakers (earphones, speakers, etc.), display the corresponding image or sound.
3. In fact, the most difficult point is to improve the premiere time and service quality, that is, Qos.
If you want to PK down other live broadcast stations technically, you can consider these solutions: 1. gop cache, to speed up the first broadcast time 2. gop frame loss, to solve the delay, why there is delay, network jitter, network The data caused by congestion cannot be sent out. All timestamps must be modified after the loss. Remember that the client will be stuck with a gop time because of dts and pts, or the player can modify dts and pts ( It’s more complicated to lose gop on the streaming end, the p frame before the p frame will be lost) 3. Pure audio loses frames, to solve the problem of audio and video unsynchronization, make the delta of the video increase after you lose the delta of the audio, and then If the audio is sent, the audio and video will not be synchronized. 4. The source station is switched between active and standby and disconnected and reconnected. 5. Intelligent scheduling is performed according to the TCP congestion window. When the congestion window is too large, the node service quality is poor, and the node needs to be switched and failed Troubleshooting 6. Increase the uplink and downlink bandwidth detection interfaces, and reduce the video quality when the bandwidth is not satisfied, that is, reduce the bit rate. 7. Obtain the best push and pull link IP at regular intervals to ensure the best service possible 8. Monitoring is necessary to monitor the Qos status of each node to optimize and schedule the resource configuration of the entire platform.