http://blog.csdn.net/span76/article/details/12913307Offline media only uses the HTTP protocol to read server-side files, and for live broadcast how to achieve, here will use the RTP/RTCP protocolRtp/rtcpRTP is based on UDP protocol, UDP does not have to establish a connection, more efficient, but allow packet loss, which requires more work when re-assembling the mediaRTP is only the parcel content information, and RTCP is the exchange of control infor
Https://github.com/whtang/GoRTPGORTP implements some important functions that modify the head and contents of the RTP packet. Most, however, handle only the payload and timestamp of the RTP packet.RTP Data groupingThe packet module implements a buffering mechanism that allows for missed calls, which reduces the dynamic allocation request for memory. Although not necessary, it is recommended that freepacket
This example demonstrates how to use the jrtplib library to encapsulate the RTP protocol in Linux. This routine can be used as a basic routine for streaming media transmission.
Only the source code is provided here (these can be found in the official jrtplib files)
Sender:
/** Sending Program (for Windows and Linux)* For IPv4-based transmission routines, a port number and destination address must be provided.* Reference: http://blog.csdn.net/ipromiseu
Some of the things that have been related to the low-latency transmission of the screen in recent time. Originally wanted to use GStreamer to verify that the RTP over UDP transfer h264 NAL data related, the results found that can not use Playbin to play RTP data! Admittedly, this also has its cause because RTP needs some out-of-band data, which is not simply pass
The RTP timestamp is calculated at clock rate to represent the time.
RTP timestamp represents the time per frame, since one frame (such as I-frame) may be divided into multiple RTP packets, so that multiple RTP timestamp of the same frame are equal. (The frame can be distinguished by the last
3. Dynamic Distribution and implementation of cache areas.
Based on this fact, the audio data is much smaller than the video data. Therefore, the audio buffer and the video buffer are managed separately. According to statistics, the RTP data packet size of the same media stream is similar. For example, the audio size is about several hundred bytes, and the video size is 1.3 Kbytes. The video buffer is divided into two parts. Some are in the Active Dat
We have been able to get video or camera data in the last issue, and we can get the frame data, then we will study RTP in this period and send the data to the target server.
Introduction to RTP protocol This is very good for friends: http://blog.csdn.net/bripengandre/article/details/2238818
RTP.NET.dll
Core code Explanation
Real-time Transport protocol
Real-time Streaming protocol RTSP (Realtimestreamingprotocol) is proposed by RealNetworks and Netscape, which defines how a one-to-many application can efficiently transfer multimedia data over an IP network. RTSP is located on the architecture of RTP (real-time transmission) and RTCP (real-time control), which uses TCP or RTP to complete the data transfer. HTTP transmits HTML compared to RTSP, while
FEC (Forward error Correction) forward error correction UDP\RTP used to improve wireless and other network packet loss problems
The algorithm is not introduced at this stage.
Idea: FEC ENCODE adds redundant packets, and when the wireless network drops packets, the receiver uses redundant packets to decode the lost packets.
Example: 10 packets, the code will add 2 packets, a total of 12 packets sent to the receiving end, the receiver lost the 5th an
RTP over RTSP (TCP) (i)solution for mixed delivery of RTP over RTSP packetsRTSP-RTP over TCP-to-use TCP communication, the need to request TCP connection during RTSP SETUP. The RTSP client needs to request a TCP connection in the setup phase for the sent Setup command with which you want to use a TCP connection. The Setup command should include transport in the f
Wireshark captures packets to obtain rtp ts Stream Data and saves it as a TS File
First parse the RTP stream
2. Click statistics-RTP-show all streams in the menu bar]
3. display the analyzed RTP streams in Wireshark: RTP streams and select the first MPEG-2, whi
These two days have been blocked by this problem.
The VxWorks document does not mention how the root task of RTP of VxWorks receives the event from the kernel mode.
The root Rask here refers to the task automatically generated after RTP spwan.
It is said that some other companies also use this workaround method. Currently, WinDriver is helpless.
First, we need to clarify one concept:
RTP supports shipping Steaming of different codec versions. The clock rate varies with codec versions. RTCP is required for synchronization between different media sets. Here is a brief introduction to their mechanism.
In each RTCP Sr package, there is an RTP time and an NTP time. It clearly indicates the absolute time corresponding to the RTP time, although the
In flash projects with audio/video interaction, the audio encoding can only be in speex format.
This article is divided into three parts. These are the audio interfaces provided in flex, The speex data in rtmp, and how to convert them to RTP streams.
I. audio interfaces provided in flex
The client is written using Flex. The interface provided by Flex is encapsulated. The call to the client is equivalent to a black box. The difference between the two
ubuntu9.10 Install OpenSER and use RTP Proxy to realize turn, solve the problem that symmetric NAT brings to SIP voice communication
Reprinted from Link http://hi.baidu.com/zj8la8la/blog/item/d700d8b2c11a41abd9335af9.html
Leave a note, convenient other people, online resources are not complete, I do a complete bar, at least I test through:My goal is very simple, just realize the SIP network MySQL database support.Start: Set the domain name
* If your
1 EVRC
Protocol Evolution: 3558->4788->5188
EVRC0 net charge format see 3558
EVRC-WB net charge format see 5188
EVRC codec algorithm based on loose code excitation linear prediction (RCELP) algorithm, with linear pre-and error control functions, EVRC family of various codes see the following diagram:
2 Multi-frame format
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
VLC plays the. 264 file sent by RTP package1, to have a server that sends RTP packets of 264 files;The specific code is as follows:Rtp.h#include Rtp.cpp #include "rtp.h" #include 2, download VLC;3, make the following settings:1> setting W.SDPA, open Vlc->media->open network streamb,-->network->rtp://@192.168.1.101:1234C,-->file->add...w.sdp->playHere to talk ab
First declare that the following code is in post http://topic.csdn.net/u/20090725/11/5FBC75B0-1091-4DD4-9154-3E3D59F9B6D1.html {Logclickcount (this, 111 );} "Href =" http://hi.csdn.net/ttxk "target =" _ blank ">TtxkAnnotations are added to ttxk and {Logclickcount (this, 111 );} "Href =" http://hi.csdn.net/jessiepan "target =" _ blank "> thank you ,{Logclickcount (this, 111 );} "Href =" http://hi.csdn.net/jessiepan "target =" _ blank "> the study spirit of jessiepan is very good, very responsible
Directly go to the topic. After JPEG compression, the data is transmitted to the network through the RTP/RTCP protocol. This topic uses the RTP/RTCP protocol stack of jrtplib, first, obtain the source code of the jrtplib package on the internet, decompress the configuration, compile and install the package, and OK if no bugs is available.
There are several examples in the source code package, which can be u
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