效果图如下：
//-------------------------------------------------------------------------------------------------------------------------------------//
SDP日志如下：
06-06 11:13:22.326: I/RTSPServer_jni(814): [RTSPServer.cpp:432 void
RTSPServer::incomingConnectionHandler(int)]: accept()ed connection from
192.168.1.100
06-06 11:13:22.328: I/RTSPServer_jni(814): [RTSPServer.cpp:898 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
RTSPClientConnection[0x55618080]::handleRequestBytes() read 121 new
bytes:OPTIONS rtsp://192.168.1.101:8554/1 RTSP/1.0
06-06 11:13:22.328: I/RTSPServer_jni(814): CSeq: 2
06-06 11:13:22.328: I/RTSPServer_jni(814): User-Agent: LibVLC/2.2.4 (LIVE555 Streaming Media v2016.02.22)
06-06 11:13:22.328: I/RTSPServer_jni(814):
06-06 11:13:22.328: I/RTSPServer_jni(814): [RTSPServer.cpp:985 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
parseRTSPRequestString() succeeded, returning cmdName "OPTIONS",
urlPreSuffix "", urlSuffix "1", CSeq "2", Content-Length 0, with
0 bytes following the message.
06-06 11:13:22.328: I/RTSPServer_jni(814): [RTSPServer.cpp:1124 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]: sending
response: RTSP/1.0 200 OK
06-06 11:13:22.328: I/RTSPServer_jni(814): CSeq: 2
06-06 11:13:22.328: I/RTSPServer_jni(814): Date: Tue, Jun 06 2017 03:13:22 GMT
06-06 11:13:22.328: I/RTSPServer_jni(814): Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, GET_PARAMETER, SET_PARAMETER
06-06 11:13:22.328: I/RTSPServer_jni(814):
06-06 11:13:22.364: I/RTSPServer_jni(814): [RTSPServer.cpp:898 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
RTSPClientConnection[0x55618080]::handleRequestBytes() read 147 new
bytes:DESCRIBE rtsp://192.168.1.101:8554/1 RTSP/1.0
06-06 11:13:22.364: I/RTSPServer_jni(814): CSeq: 3
06-06 11:13:22.364: I/RTSPServer_jni(814): User-Agent: LibVLC/2.2.4 (LIVE555 Streaming Media v2016.02.22)
06-06 11:13:22.364: I/RTSPServer_jni(814): Accept: application/sdp
06-06 11:13:22.364: I/RTSPServer_jni(814):
06-06 11:13:22.364: I/RTSPServer_jni(814): [RTSPServer.cpp:985 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
parseRTSPRequestString() succeeded, returning cmdName "DESCRIBE",
urlPreSuffix "", urlSuffix "1", CSeq "3", Content-Length 0, with
0 bytes following the message.
06-06 11:13:22.502: I/RTSPServer_jni(814): [RTSPServer.cpp:1124 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]: sending
response: RTSP/1.0 200 OK
06-06 11:13:22.502: I/RTSPServer_jni(814): CSeq: 3
06-06 11:13:22.502: I/RTSPServer_jni(814): Date: Tue, Jun 06 2017 03:13:22 GMT
06-06 11:13:22.502: I/RTSPServer_jni(814): Content-Base: rtsp://192.168.1.101:8554/1/
06-06 11:13:22.502: I/RTSPServer_jni(814): Content-Type: application/sdp
06-06 11:13:22.502: I/RTSPServer_jni(814): Content-Length: 673
06-06 11:13:22.502: I/RTSPServer_jni(814):
06-06 11:13:22.502: I/RTSPServer_jni(814): v=0
06-06 11:13:22.502: I/RTSPServer_jni(814): o=- 1496717469771075 1 IN IP4 192.168.1.101
06-06 11:13:22.502: I/RTSPServer_jni(814): s=Session streamed by "RTSPServer"
06-06 11:13:22.502: I/RTSPServer_jni(814): i=1
06-06 11:13:22.502: I/RTSPServer_jni(814): t=0 0
06-06 11:13:22.502: I/RTSPServer_jni(814): a=tool:LIVE555 Streaming Media v2014.07.18
06-06 11:13:22.502: I/RTSPServer_jni(814): a=type:broadcast
06-06 11:13:22.502: I/RTSPServer_jni(814): a=control:rtsp://192.168.1.101:8554/1
06-06 11:13:22.502: I/RTSPServer_jni(814): a=range:npt=0-
06-06 11:13:22.502: I/RTSPServer_jni(814): a=x-qt-text-nam:Session streamed by "RTSPServer"
06-06 11:13:22.502: I/RTSPServer_jni(814): a=x-qt-text-inf:1
06-06 11:13:22.502: I/RTSPServer_jni(814): m=video 0 RTP/AVP 96
06-06 11:13:22.502: I/RTSPServer_jni(814): c=IN IP4 0.0.0.0
06-06 11:13:22.502: I/RTSPServer_jni(814): b=AS:500
06-06 11:13:22.502: I/RTSPServer_jni(814): a=rtpmap:96 H264/90000
06-06 11:13:22.502: I/RTSPServer_jni(814): a=fmtp:96
packetization-mode=1;profile-level-id=42C01E;sprop-parameter-sets=Z0LAHrkQFAe0IAAAAwAgAAAFEeLF1A==,aM48gA==
06-06 11:13:22.502: I/RTSPServer_jni(814): a=recvonly;
06-06 11:13:22.502: I/RTSPServer_jni(814): a=control:rtsp://192.168.1.101:8554/1/trackID=1
06-06 11:13:22.502: I/RTSPServer_jni(814): m=audio 0 RTP/AVP 97
06-06 11:13:22.502: I/RTSPServer_jni(814): c=IN IP4 0.0.0.0
06-06 11:13:22.502: I/RTSPServer_jni(814): b=AS:96
06-06 11:13:22.502: I/RTSPServer_jni(814): a=rtpmap:97 PCMA/8000
06-06 11:13:22.502: I/RTSPServer_jni(814): a=recvonly;
06-06 11:13:22.502: I/RTSPServer_jni(814): a=control:rtsp://192.168.1.101:8554/1/trackID=2
06-06 11:13:22.574: I/RTSPServer_jni(814): [RTSPServer.cpp:898 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
RTSPClientConnection[0x55618080]::handleRequestBytes() read 181 new
bytes:SETUP rtsp://192.168.1.101:8554/1/trackID=1 RTSP/1.0
06-06 11:13:22.574: I/RTSPServer_jni(814): CSeq: 4
06-06 11:13:22.574: I/RTSPServer_jni(814): User-Agent: LibVLC/2.2.4 (LIVE555 Streaming Media v2016.02.22)
06-06 11:13:22.574: I/RTSPServer_jni(814): Transport: RTP/AVP;unicast;client_port=59928-59929
06-06 11:13:22.574: I/RTSPServer_jni(814):
06-06 11:13:22.574: I/RTSPServer_jni(814): [RTSPServer.cpp:985 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
parseRTSPRequestString() succeeded, returning cmdName "SETUP",
urlPreSuffix "1", urlSuffix "trackID=1", CSeq "4", Content-Length
0, with 0 bytes following the message.
06-06 11:13:22.585: I/RTSPServer_jni(814): [RTSPServer.cpp:1124 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]: sending
response: RTSP/1.0 200 OK
06-06 11:13:22.585: I/RTSPServer_jni(814): CSeq: 4
06-06 11:13:22.585: I/RTSPServer_jni(814): Date: Tue, Jun 06 2017 03:13:22 GMT
06-06 11:13:22.585: I/RTSPServer_jni(814): Transport:
RTP/AVP;unicast;destination=192.168.1.100;source=192.168.1.101;client_port=59928-59929;server_port=6970-6971
06-06 11:13:22.585: I/RTSPServer_jni(814): Session: FE96A902;timeout=65
06-06 11:13:22.585: I/RTSPServer_jni(814):
06-06 11:13:22.593: I/RTSPServer_jni(814): [RTSPServer.cpp:898 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
RTSPClientConnection[0x55618080]::handleRequestBytes() read 200 new
bytes:SETUP rtsp://192.168.1.101:8554/1/trackID=2 RTSP/1.0
06-06 11:13:22.593: I/RTSPServer_jni(814): CSeq: 5
06-06 11:13:22.593: I/RTSPServer_jni(814): User-Agent: LibVLC/2.2.4 (LIVE555 Streaming Media v2016.02.22)
06-06 11:13:22.593: I/RTSPServer_jni(814): Transport: RTP/AVP;unicast;client_port=59930-59931
06-06 11:13:22.593: I/RTSPServer_jni(814): Session: FE96A902
06-06 11:13:22.593: I/RTSPServer_jni(814):
06-06 11:13:22.593: I/RTSPServer_jni(814): [RTSPServer.cpp:985 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
parseRTSPRequestString() succeeded, returning cmdName "SETUP",
urlPreSuffix "1", urlSuffix "trackID=2", CSeq "5", Content-Length
0, with 0 bytes following the message.
06-06 11:13:22.596: I/RTSPServer_jni(814): [RTSPServer.cpp:1124 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]: sending
response: RTSP/1.0 200 OK
06-06 11:13:22.596: I/RTSPServer_jni(814): CSeq: 5
06-06 11:13:22.596: I/RTSPServer_jni(814): Date: Tue, Jun 06 2017 03:13:22 GMT
06-06 11:13:22.596: I/RTSPServer_jni(814): Transport:
RTP/AVP;unicast;destination=192.168.1.100;source=192.168.1.101;client_port=59930-59931;server_port=6972-6973
06-06 11:13:22.596: I/RTSPServer_jni(814): Session: FE96A902;timeout=65
06-06 11:13:22.596: I/RTSPServer_jni(814):
06-06 11:13:22.628: I/RTSPServer_jni(814): [RTSPServer.cpp:898 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
RTSPClientConnection[0x55618080]::handleRequestBytes() read 156 new
bytes:PLAY rtsp://192.168.1.101:8554/1 RTSP/1.0
06-06 11:13:22.628: I/RTSPServer_jni(814): CSeq: 6
06-06 11:13:22.628: I/RTSPServer_jni(814): User-Agent: LibVLC/2.2.4 (LIVE555 Streaming Media v2016.02.22)
06-06 11:13:22.628: I/RTSPServer_jni(814): Session: FE96A902
06-06 11:13:22.628: I/RTSPServer_jni(814): Range: npt=0.000-
06-06 11:13:22.628: I/RTSPServer_jni(814):
06-06 11:13:22.628: I/RTSPServer_jni(814): [RTSPServer.cpp:985 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
parseRTSPRequestString() succeeded, returning cmdName "PLAY",
urlPreSuffix "", urlSuffix "1", CSeq "6", Content-Length 0, with 0
bytes following the message.
06-06 11:13:22.629: I/RTSPServer_jni(814): [RTSPServer.cpp:1124 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]: sending
response: RTSP/1.0 200 OK
06-06 11:13:22.629: I/RTSPServer_jni(814): CSeq: 6
06-06 11:13:22.629: I/RTSPServer_jni(814): Date: Tue, Jun 06 2017 03:13:22 GMT
06-06 11:13:22.629: I/RTSPServer_jni(814): Range: npt=0.000-
06-06 11:13:22.629: I/RTSPServer_jni(814): Session: FE96A902
06-06 11:13:22.629: I/RTSPServer_jni(814): RTP-Info:
url=rtsp://192.168.1.101:8554/1/trackID=1;seq=37075;rtptime=1897189058,url=rtsp://192.168.1.101:8554/1/trackID=2;seq=25069;rtptime=1038717352
06-06 11:13:22.629: I/RTSPServer_jni(814):
06-06 11:13:22.744: I/RTSPServer_jni(814): [RTSPServer.cpp:898 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
RTSPClientConnection[0x55618080]::handleRequestBytes() read 146 new
bytes:GET_PARAMETER rtsp://192.168.1.101:8554/1 RTSP/1.0
06-06 11:13:22.744: I/RTSPServer_jni(814): CSeq: 7
06-06 11:13:22.744: I/RTSPServer_jni(814): User-Agent: LibVLC/2.2.4 (LIVE555 Streaming Media v2016.02.22)
06-06 11:13:22.744: I/RTSPServer_jni(814): Session: FE96A902
06-06 11:13:22.744: I/RTSPServer_jni(814):
06-06 11:13:22.744: I/RTSPServer_jni(814): [RTSPServer.cpp:985 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]:
parseRTSPRequestString() succeeded, returning cmdName "GET_PARAMETER",
urlPreSuffix "", urlSuffix "1", CSeq "7", Content-Length 0,
with 0 bytes following the message.
06-06 11:13:22.745: I/RTSPServer_jni(814): [RTSPServer.cpp:1124 void
RTSPServer::RTSPClientConnection::handleRequestBytes(int)]: sending
response: RTSP/1.0 200 OK
06-06 11:13:22.745: I/RTSPServer_jni(814): CSeq: 7
06-06 11:13:22.745: I/RTSPServer_jni(814): Date: Tue, Jun 06 2017 03:13:22 GMT
06-06 11:13:22.745: I/RTSPServer_jni(814): Session: FE96A902
06-06 11:13:22.745: I/RTSPServer_jni(814): Content-Length: 10
06-06 11:13:22.745: I/RTSPServer_jni(814):
06-06 11:13:22.745: I/RTSPServer_jni(814): 2014.07.18
06-06 11:13:25.488: I/RTSPServer_jni(814): [RTSPServer.cpp:2145 static
void
RTSPServer::RTSPClientSession::noteClientLiveness(RTSPServer::RTSPClientSession*)]:
RTSP client session (id "FE96A902", stream name "1"): Liveness
indication
06-06 11:13:25.567: I/RTSPServer_jni(814): [RTSPServer.cpp:2145 static
void
RTSPServer::RTSPClientSession::noteClientLiveness(RTSPServer::RTSPClientSession*)]:
RTSP client session (id "FE96A902", stream name "1"): Liveness
indication
06-06 11:13:31.077: I/RTSPServer_jni(814): [RTSPServer.cpp:2145 static
void
RTSPServer::RTSPClientSession::noteClientLiveness(RTSPServer::RTSPClientSession*)]:
RTSP client session (id "FE96A902", stream name "1"): Liveness
indication
06-06 11:13:31.077: I/RTSPServer_jni(814): [RTSPServer.cpp:2145 static
void
RTSPServer::RTSPClientSession::noteClientLiveness(RTSPServer::RTSPClientSession*)]:
RTSP client session (id "FE96A902", stream name "1"): Liveness
indication
//-------------------------------------------------------------------------------------------------------------------------------------//
技术点：
1、live555实时数据处理（难点）
2、G711编码实现（同时实现AAC编码）
3、音视频时间戳的了解（后期做同步需要深入研究）
4、VLC的日志调试
//-------------------------------------------------------------------------------------------------------------------------------------//
遇到的难点：
1、live555通过队列取G711 ALAW编码数据，数据发生变化导致VLC播放有杂音
解决方案：
查起来麻烦，摈弃队列使用缓存拷贝，VLC播放效果明显变好
2、G711 ALAW编码数据正常，live555推流结束后，VLC才播放开始几包声音数据
原因：VLC播放声音原因时间戳
解决方案：在AudioFrameLiveSource::doGetNextFrame()中添加gettimeofday(&fPresentationTime,NULL);
3、单独视频流单独音频流VLC都播放正常。两路流一起推，VLC黑屏声音正常
原因：live555单线程机制，AudioFrameLiveSource::doGetNextFrame()和VideoFrameLiveSource::doGetNextFrame()两个不能都有阻塞操作，出现上述现象是因为，AudiodoGetNextFrame获取实时数据频率高且有阻塞等待现象，导致视频VideodoGetNextFrame也无法处理数据。
解决方案：目前机制AudiodoGetNextFrame获取实时数据失败不做等待且memcpy(fTo,audiodata,
0)，VideodoGetNextFrame仍阻塞获取实时数据。效果不错！
