[Live-devel] (no subject)

Wed May 7 07:23:48 PDT 2008

hello, 

I am a student engineer in France, in the DCNS society, and I wish  stream 
a video acquisition card : 
I am using the test program testMPEG1or2VideoStreamer, and have modifie 
the adresse like indicated in the forum. 

like this : 
******************************************************************************************************************** 

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 = "/dev/video0"; 
#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 
    = "192.168.0.2"; 
#else 
    = "192.168.0.2"; 
  // 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); 
  printf("inet ==%d\n",destinationAddress.s_addr); 

  const Port rtpPort(rtpPortNum); 

  const Port rtcpPort(rtcpPortNum); 

    printf("debut\n"); 
  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); 

  // 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); 
} 
******************************************************************************************************************** 

I just want send the video via RTP, and i Have this error message : 

********************************************************************************* 

[root at audio_1 testProgs]# ./testMPEG1or2VideoStreamer 
debut 
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, 
I receive with VLC, and stream with this testprog. 

What 's wrong ??? 
Thank you. 

_________________________
     Julien Savarese 
     Apprenti ingénieur. 
     Division SIS/DPM/RMS/MIE.
---------------------------------------------

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