Hi to everybody,
I tried to modify the testOnDemandRTSPServer.cpp source to stream H263+
video. First, I try to read the stream from a file.
In the future, I'd like to encode and stream on the fly.
The problem is, I simply added this code to the source file:
{
char const* streamName = "H263ESVideoTest";
char const* inputFileName = "video-H263-1998-1.3pg";
ServerMediaSession* sms
= ServerMediaSession::createNew(*env, streamName, streamName,
descriptionString);
sms->addSubsession(H263plusVideoFileServerMediaSubsession
::createNew(*env, inputFileName, reuseFirstSource));
rtspServer->addServerMediaSession(sms);
announceStream(rtspServer, sms, streamName, inputFileName);
}
mainly imitating the pre-existing code.
RTSP Server waits correctly on port 8554. When I try to play it either
with VLC or openRTSP, the client-server communication goes like that:
----------------------
VLC media player 0.8.6c Janus
Sending request: OPTIONS rtsp://217.133.231.30:8554/H263ESVideoTest RTSP/1.0
CSeq: 1
User-Agent: VLC media player (LIVE555 Streaming Media v2007.02.20)
Received OPTIONS response: RTSP/1.0 200 OK
CSeq: 1
Date: Thu, Dec 06 2007 16:55:58 GMT
Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE
Sending request: DESCRIBE rtsp://217.133.231.30:8554/H263ESVideoTest
RTSP/1.0
CSeq: 2
Accept: application/sdp
User-Agent: VLC media player (LIVE555 Streaming Media v2007.02.20)
Received DESCRIBE response: RTSP/1.0 200 OK
CSeq: 2
Date: Thu, Dec 06 2007 16:55:58 GMT
Content-Base: rtsp://217.133.231.30:8554/H263ESVideoTest/
Content-Type: application/sdp
Content-Length: 369
Need to read 369 extra bytes
Read 369 extra bytes: v=0
o=- 1196960112744027 1 IN IP4 217.133.231.30
s=Session streamed by "testOnDemandRTSPServer"
i=H263ESVideoTest
t=0 0
a=tool:LIVE555 Streaming Media v2007.02.20
a=type:broadcast
a=control:*
a=range:npt=0-
a=x-qt-text-nam:Session streamed by "testOnDemandRTSPServer"
a=x-qt-text-inf:H263ESVideoTest
m=video 0 RTP/AVP 34
c=IN IP4 0.0.0.0
a=control:track1
[00000292] live555 demuxer error: Nothing to play for
rtsp://217.133.231.30:8554/H263ESVideoTest
[00000290] main input error: no suitable access module for
`rtsp://217.133.231.30:8554/H263ESVideoTest'
[00000281] main playlist: nothing to play
[00000281] main playlist: stopping playback
----------------------------------
It seems that the SDP misses the a=rtpmap:96 H263-1998/90000 line. It
also yelds the strange m=video 0 RTP/AVP 34, as if it would send RTP
contents on port 0.
After that, I tried to modify the testMPEG1or2VideoStreamer.cpp program,
again simply substituting the Mpeg 1/2 sink with H263plusVideoRTPSink
and the Mpeg 1/2 framer with H263plusVideoStreamFramer, and activating
the RTSP server defining IMPLEMENT_RTSP_SERVER.
It works, but with several problems:
1. Won't do RTP over TCP when requested (RTSP server returns with a 460
and something code, complaining it's not supported). It only works with UDP.
2. Port is fixed to 8888 (it makes sense, since we define it at the
beginning of the program)
3. In addiction of streaming on demand, it also streams multicast on
239.255.42.42 (it also makes sense, but I don't know how to avoid it).
I think the correct solution is using the onDemand approach, but does
someone know the reason of its strange behaviour (and how to crcumvent
it, of course)?
Best regards,
Cristiano.
--
Belloni Cristiano
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