RTSP protocol / RTMP protocol /HLS ,H.265 ,H.264, ps ,rtp, tse

Common: RTSP RTMP HTTP is an application layer. In theory RTSP, RTMP, HTTP can do live and on-demand, but generally live RTSP RTMP, doing point broadcast HTTP. When making a video conference, I originally used the SIP protocol, now basically replaced by the RTMP protocol. the difference: HTTP: The hypertext transfer protocol (FTP is a file transfer protocol). HTTP: (Real Time Streaming Protocol), real-time flow transfer protocol. HTTP full name Routing Table Maintenance Protocol (Routing Selection Table Maintenance Protocol). HTTP will work all the data as a file. The HTTP protocol is not a streaming protocol. The RTMP and RTSP protocols are streaming media protocols. RTSP, RTMP The RTMP protocol is the private protocol of Adobe, not fully disclosed, and the RTSP protocol and HTTP protocol are common agreements and have specialized agencies to do maintenance. The flow format is different a. The RTMP protocol is generally transmitted by FLV, F4V format, b. RTSP protocol is generally transmitted by TS, MP4 format. RTSP transmissions generally require 2-3 channels, commands, and data channel separation, HTTP, and RTMP generally transmit commands and data on a channel of TCP. Different RTSP + RTPs are mainly used for IPTV or low delay scenarios, such as monitoring cameras, transmit data UDP or TCP, transmit efficiency is relatively high in the case where the network environment is stable; RTMP is mainly used for Internet Audio and video transmission, it uses TCP transmission because the Internet environment is relatively poor, using RTMP to ensure the transmission quality of the video, but its transmission delay is relatively high, and the transmission efficiency is relatively low. HLS HLS is mainly delayed, and the main advantage of RTMP is low in delay. HLS can be used on the iOS system app, WeChat public account, applet, etc. can only use HLS. In live broadcast applications, RTMP and HLS can basically overwrite all client viewing. Expand: Coding, Packaging Coding format: Support H.265, H.264, MPEG4, MJPEG and other coding formats; package format: supports mainstream package formats such as PS, RTP, TS, ES; Physical sights are converted to digital information by IPC (encoding equipment), for example The encoding IPC (encoding device) is taken first, and then the picture is converted into machine data package IPC (encoding equipment) in one of the formats of "H.265, H.264, MPEG4, MJPEG, etc.". String coded data (possibly a picture, maybe multiple pictures) According to the standards in a format in the mainstream package format such as PS, RTP, TS, ES, plus the package head, and carry out the benefits of the transmission seal : Easy to decode decoder, such as telling the decoder's encoding standard, resolution, etc.

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