cisco rtp

RTP h264 PS MPEG-2 Preface: RTP analysis. I found a lot of information on the Internet, but it was not complete. So I tried to make a comprehensive analysis, I have referenced many articles and listed them at the end of the article. I would like to express my gratitude. The development of the Internet is inseparable from the selfless dedication of everyone. I decided to start from me and hope everyone can s

Warning: The original page of this article http://www.cnblogs.com/moonvan/archive/2011/09/11/2173448.htmlOn the basis of a slight modification, if there is infringement, please notify the deletion, thank you!Streaming Media Protocol There are two main ways to transfer audio and video information on the Internet today: Download and streaming. In the case of download, the user needs to download the entire media file locally before the media file can be played. Streaming refers to

1. Network Abstraction Layer Unit type (NALU)Nalu is H264 used for network transmission of the unit type, a complete Nalu unit is generally 0x000001 or 0x00000001 start, followed by Nalu head and NALU data; When we were transmitting in the network, Will remove the start 0x000001 or 0x00000001, and you will typically need to replace them with the head of the RTP payload (1 bytes);Where NALU data is rbsp data;The Nalu header consists of a byte with the

Here we will mainly analyze the content about RTP packaging and sending in live555. After the play command is processed, the RTP packet is sent. (In fact, a RTP packet will be sent before the response packet of the play command is sent, and the transfer has started here)The RTP packet is sent starting from the call of

=====================================================Audio-visual data Processing Primer series articles:Getting started with visual audio data processing: RGB, YUV pixel data processingGetting Started with AV data processing: PCM Audio sampling data processingGetting Started with AV data processing: Analysis of video stream in H.Getting Started with AV data processing: AAC audio bitstream parsingGetting Started with AV data processing: FLV Encapsulation Format parsingGetting Started with AV dat

The Header Format of RTP is as follows: Version Number (V): 2 bits, used to mark the RTP version used. Fill bit (P): 1 bit. If this position is set, the end of the RTP package contains additional fill bytes. Extended bit (x): 1 bit. If this location is used, an extended header is followed by a fixed RTP Header. CSRC co

Recently made video codec part, transmission using RTP protocol. Make a record of learning1. Introduction　　The real-time Transport protocol (real-time Transport Protocol or abbreviated RTP) is a network transport protocol, which is a multimedia transmission by the IETF Working Group 1996 in RFC Published in 1889. RTP is defined as a transport protocol for transmi

in streaming media technology.H.264/AVCIt is a new generation of video coding standards jointly developed by a Joint Video group (JVT) consisting of the ITU-T video coding Expert Group (VCEG) and the ISO/IEC dynamic image Expert Group (mPEG, its biggest advantage is its high data compression ratio. h. 264 of the compression ratio is more than 2 times of the MPEG-2, is the MPEG-4 of 1.5 ~ 2 times. At the same time, the layer design of the video encoding layer (VCL) and network extraction layer (

Session. begindataaccess (); If (session. gotofirstsource () {do {rtppacket * packet; while (packet = session. getnextpacket ())! = 0) {cout For the establishment of the jrtplib environment, I can refer to my previous summary. Now I will mainly talk about how to learn example under jrtplib3.71. I. sample is a simple IPv4 column that implements RTP data transmission on the local machine. 1. initialization. We know that

Session. begindataaccess (); If (session. gotofirstsource () {do {rtppacket * packet; while (packet = session. getnextpacket ())! = 0) {cout For the establishment of the jrtplib environment, I can refer to my previous summary. Now I will mainly talk about how to learn example under jrtplib3.71. I. sample is a simple IPv4 column that implements RTP data transmission on the local machine. 1. initialization. We know that

1 Streaming Media protocol There are two main ways to transfer audio and video information on the Internet today: Download and streaming. In the case of download, the user needs to download the entire media file locally before the media file can be played. Streaming refers to the pre-processing of multimedia (reducing quality and efficient compression) before transmission, and then using a caching system to ensure that the data is continuously and correctly transmitted. T

H. A video RTP payload format1. Network Abstraction Layer Unit type (NALU)The Nalu header consists of a byte with the following syntax:+---------------+|0|1|2|3|4|5|6|7|+-+-+-+-+-+-+-+-+| F| nri| Type |+---------------+F:1 a bit.Forbidden_zero_bit. This one must be 0, as stipulated in the H.Nri:2 a bit.NAL_REF_IDC. taking 00 ~ 11, it seems to indicate the importance of this nalu, such as 00 of the Nalu decoder can discard it without affecting the play

Play captured h263 RTP video 1. Use ethereal/Wireshark to capture RTP data packets and select the h263 filter condition to save2. Statistics/RTP streams/streams Analysis3. Save payload select to save raw data4. Use ffplay to play ffplay-F h263 File Play RTP audioHttp://www.ethereal.com/lists/ethereal-users/200401/m

RTP packet: a packet with an RTP header on the start, that is, RTP packet. Generally, in the bottom layer protocol, a packet contains only one RTP packet, but through some special encapsulation methods, the bottom layer packet can also contain more than one RTP packet.

5.3.1 RTP Header Extension The following provides an extension mechanism to allow some implementation requirements to experiment with the new load format-independent feature that carries additional information in the RTP data header. This mechanism is designed for other unscalable implementations to ignore these header extensions. Note that this header extension is intended for some limited purposes. Most o

1. Network abstraction layer unit type (NALU) The NALU header consists of one byte,Its syntax is as follows: + --------------- +| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |+-+| F | NRI | type |+ --------------- + F: 1 bit.Forbidden_zero_bit. The H.264 specification specifies that this digit must be 0. NRI: 2 bits.Nal_ref_idc. 00 ~ 11. It seems to indicate this naluFor example, 00 NALU decoder can discard it without affecting image playback. This attribute. Type: 5 bits.Nal_unit_type. Type of the NALU unit.