Shulou(Shulou.com)06/02 Report--

Scene

After the RTSP connection is established, the video data is received through rtp over tcp. The data stream obtained in the following example still has the problem of 2 RTP payloads apart, but from a byte point of view, the RTP load is very small and should not have any impact on the data.

Description

Masks RecvBuffer-> RecvBuffer (pszOneBytes, nRealReadLen, 1); the second parameter is the actual number of bytes read, and the third parameter specifies how many bytes are currently read

Code

Struct RTPHeader

{

Unsigned char szHeader [4]

}

Unsigned short sRTPPayLoadLen = 0 RTP / the length of the entire RTP message is determined by the two bytes after $0x00 | 0x01

Unsigned char cOneBytes = 0 Byte / save the first byte to determine whether it is $to determine whether it is a RTP payload packet or a RTSP instruction package

Char* pszOneBytes = (char*) & cOneBytes;// can only receive data through symbolic characters, so forced conversion is used.

Int nRealReadLen = 0 position / saved the number of bytes read each time

Int nRet = mSecretsock-> RecvBuffer (pszOneBytes, nRealReadLen, 1); / / after establishing the rtsp link, start reading the first byte

If (nRet RecvBuffer (pszOneBytes, nRealReadLen, 1)

If ((nRet RecvBuffer (pszOneBytes, nRealReadLen, 1); / / try to read the high load length

If ((nRet RecvBuffer (pszOneBytes, nRealReadLen, 1); / / attempt to read the low load length

If ((nRet 1500) continue;// data cannot exceed 1500, LAN transmission bandwidth requirements

Char szRTPPayLoadContent [1500] = {0}

NRealReadLen = 0

NRet = masked socks-> RecvBuffer (szRTPPayLoadContent, nRealReadLen, sRTPPayLoadLen)

RTPHeader* pHeader = (RTPHeader*) szRTPPayLoadContent

Unsigned short sRTPSeq = (pHeader- > szHeader [2] szHeader [3])

/ / std::cout

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.