[Live-devel] (no subject)
julien.savarese at dcnsgroup.com
julien.savarese at dcnsgroup.com
Tue May 13 01:23:57 PDT 2008
hello,
thanks for your great responce, I have change my route like this :
destination : 255.255.0.0 mask : 255.255.255.0 gateway : 192.168.0.254,
my workstation IP is 192.168.0.2.
but I have a other probleme, i try to read the file trasnmit with
testMPEG1or2VideoStreamer with vlc , in udp with the port 1234.
I just want use the RTP protocole, and don't have a serveur RSTP, so I
erased the part of code I think is useless for simple RTP streming, but I
must be wrong, because VLC cannot read this rtp stream, the error :" main
private error : cannot prefill buffer" is in VLC.
can you say me if the modified code is correct ???
I am not sure that Groupsock rtcpGroupsock(*env, destinationAddress,
rtcpPort, ttl) is usefull...
there is the code modified :
/**********
This library is free software; you can redistribute it and/or modify it
under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See
<http://www.gnu.org/copyleft/lesser.html>.)
This library is distributed in the hope that it will be useful, but
WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation,
Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// Copyright (c) 1996-2007, Live Networks, Inc. All rights reserved
// A test program that reads a MPEG-1 or 2 Video Elementary Stream file,
// and streams it using RTP
// main program
#include "liveMedia.hh"
#include "BasicUsageEnvironment.hh"
#include "GroupsockHelper.hh"
// Uncomment the following if the input file is a MPEG Program Stream
// rather than a MPEG Video Elementary Stream
#define SOURCE_IS_PROGRAM_STREAM 1
// To stream using "source-specific multicast" (SSM), uncomment the
following:
//#define USE_SSM 1
#ifdef USE_SSM
Boolean const isSSM = True;
#else
Boolean const isSSM = False;
#endif
// To set up an internal RTSP server, uncomment the following:
//#define IMPLEMENT_RTSP_SERVER 1
// (Note that this RTSP server works for multicast only)
// To stream *only* MPEG "I" frames (e.g., to reduce network bandwidth),
// change the following "False" to "True":
Boolean iFramesOnly = True;
UsageEnvironment* env;
char const* inputFileName = "test.mpg";
//char const* inputFileName = "/dev/video";
#ifdef SOURCE_IS_PROGRAM_STREAM
MPEG1or2Demux* mpegDemux;
#endif
MediaSource* videoSource;
RTPSink* videoSink;
void play(); // forward
int main(int argc, char** argv) {
// Begin by setting up our usage environment:
TaskScheduler* scheduler = BasicTaskScheduler::createNew();
env = BasicUsageEnvironment::createNew(*scheduler);
// Create 'groupsocks' for RTP and RTCP:
char* destinationAddressStr
#ifdef USE_SSM
= "192.168.0.1";
#else
= "192.168.0.1";
// Note: This is a multicast address. If you wish to stream using
// unicast instead, then replace this string with the unicast address
// of the (single) destination. (You may also need to make a similar
// change to the receiver program.)
#endif
const unsigned short rtpPortNum = 1234;
// const unsigned short rtpPortNum = 8888;
const unsigned short rtcpPortNum = rtpPortNum+1;
const unsigned char ttl = 1; // low, in case routers don't admin scope
struct in_addr destinationAddress;
destinationAddress.s_addr = our_inet_addr(destinationAddressStr);
const Port rtpPort(rtpPortNum);
const Port rtcpPort(rtcpPortNum);
Groupsock rtpGroupsock(*env, destinationAddress, rtpPort, ttl);
Groupsock rtcpGroupsock(*env, destinationAddress, rtcpPort, ttl);
#ifdef USE_SSM
rtpGroupsock.multicastSendOnly();
rtcpGroupsock.multicastSendOnly();
#endif
// Create a 'MPEG Video RTP' sink from the RTP 'groupsock':
videoSink = MPEG1or2VideoRTPSink::createNew(*env, &rtpGroupsock);
// Create (and start) a 'RTCP instance' for this RTP sink:
const unsigned estimatedSessionBandwidth = 4500; // in kbps; for RTCP
b/w share
const unsigned maxCNAMElen = 100;
unsigned char CNAME[maxCNAMElen+1];
gethostname((char*)CNAME, maxCNAMElen);
CNAME[maxCNAMElen] = '\0'; // just in case
/*#ifdef IMPLEMENT_RTSP_SERVER
RTCPInstance* rtcp =
#endif
*/
RTCPInstance::createNew(*env, &rtcpGroupsock,
estimatedSessionBandwidth, CNAME,
videoSink, NULL /* we're a server */,
isSSM);
// Finally, start the streaming:
*env << "Beginning streaming...\n";
play();
env->taskScheduler().doEventLoop(); // does not return
return 0; // only to prevent compiler warning
}
void afterPlaying(void* /*clientData*/) {
*env << "...done reading from file\n";
Medium::close(videoSource);
#ifdef SOURCE_IS_PROGRAM_STREAM
Medium::close(mpegDemux);
#endif
// Note that this also closes the input file that this source read from.
play();
}
void play() {
// Open the input file as a 'byte-stream file source':
ByteStreamFileSource* fileSource
= ByteStreamFileSource::createNew(*env, inputFileName);
if (fileSource == NULL) {
*env << "Unable to open file \"" << inputFileName
<< "\" as a byte-stream file source\n";
exit(1);
}
FramedSource* videoES;
#ifdef SOURCE_IS_PROGRAM_STREAM
// We must demultiplex a Video Elementary Stream from the input source:
mpegDemux = MPEG1or2Demux::createNew(*env, fileSource);
videoES = mpegDemux->newVideoStream();
#else
// The input source is assumed to already be a Video Elementary Stream:
videoES = fileSource;
#endif
// Create a framer for the Video Elementary Stream:
videoSource
= MPEG1or2VideoStreamFramer::createNew(*env, videoES, iFramesOnly);
// Finally, start playing:
*env << "Beginning to read from file...\n";
videoSink->startPlaying(*videoSource, afterPlaying, videoSink);
}
thanks for you attention.
________________________
Julien Savarese
Apprenti ingénieur.
Division SIS/DPM/RMS/MIE.
---------------------------------------------
Ross Finlayson <finlayson at live555.com>
Envoyé par : live-devel-bounces at ns.live555.com
07/05/2008 17:40
Veuillez répondre à
LIVE555 Streaming Media - development & use <live-devel at ns.live555.com>
A
LIVE555 Streaming Media - development & use <live-devel at ns.live555.com>
cc
Objet
Re: [Live-devel] (no subject)
Unable to determine our source address: This computer has an invalid IP
address: 0x0
Beginning streaming...
Beginning to read from file...
**********************************************************************************
I don't understand, because my IP adresse is correct, but i'm using the
same computer to stream and receive,
Nonetheless, something is wrong with the networking configuration of your
system, because neither of the methods we use to determine the computer's
IP address - (1) multicast loopback and (2) gethostname()+gethostbyname()
- is working.
The most common reason for this error is that IP multicast is not
configured correctly on your system. Make sure that you have a route
installed for 224/8.
--
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/_______________________________________________
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