Introduction:
In the process of live broadcast APP development , building protocols to realize corresponding functions is one of the key points of development, and the protocols for live broadcast APP development are numerous and complicated, so from a while ago, I made a protocol article on live broadcast development until today I have already shared four protocols, and now I will share the fifth protocol for you: Real-time Transport Protocol RTP.
1. Introduction to Real-time Transport Protocol RTP:
The RTP protocol, also known as the real-time transmission protocol, is mainly used to transmit the audio and video data of the live APP. In the live broadcast room of the live APP, the anchor will broadcast live for the audience, and the RTP protocol can transmit the sound and image of the anchor to the microphone and camera. The audio and video data is encoded, encapsulated into RTP data packets, and transmitted to the viewer. After receiving the RTP data packets, the viewer will decode and restore the audio and video content of the host for playback.
Second, the role of the real-time transport protocol RTP:
- Real-time transmission and flow control: When the live broadcast APP provides users with live broadcast and short video services, the most important thing is real-time, and the RTP protocol is built to transmit audio and video streams in real time, and it can adjust data transmission in real time according to factors such as the network The speed ensures that data can be transmitted in real time. And the traffic of the live app is determined according to the number of users using the live app. If a certain number of users use the live app at the same time, the huge data traffic may cause traffic congestion. The RTP protocol can control the amount of live app traffic sent , to avoid data transmission failure caused by network congestion on the live broadcast platform.
- Add time and sequence numbers: The RTP protocol can record the time of audio and video transmission for the transmitted data and the sequence number of the audio and video data packets, which allows the receiving end to correctly play the continuous data packets in the correct time sequence, thus ensuring Smooth audio and video playback.
- Data format description and packet loss recovery: The RTP protocol allows some descriptive information to be included in the data packet to help the live APP receiver correctly decode and play media data. The RTP protocol can be used in conjunction with RTCP to monitor the quality of data transmission, and take some measures to deal with packet loss and other issues when necessary.
3. Simple construction of some reference codes of the real-time transport protocol RTP:
import socket
rtp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
rtp_port = 1234
rtp_socket.bind(('localhost', rtp_port))
packet_size = 1024
while True:
data, addr = rtp_socket.recvfrom(packet_size)
print("Received RTP packet:", data)in conclusion:
The real-time transmission protocol RTP is one of the things that must be done in the development of live broadcast APP. It can ensure the real-time, sequential, stability and correctness of data transmission, ensure the operation service of the platform, and the experience of users using the live broadcast APP. Real-time transmission protocol The construction of RTP has important significance.