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• Revision c0490a5cbb : Revert "Adjust error resilience test data rate." This reverts commit b24735c622

  7 mai 2013, par John Koleszar

  Changed Paths :
   Modify /test/error_resilience_test.cc

  
  
  Revert "Adjust error resilience test data rate."

  This reverts commit b24735c622cefe3a03633edd69dff65d2a6ee0dd
  since the adjusted threshold doesn't allow the existing tests
  to pass. Will disable the failing test in a separate commit.

  Change-Id : I26d41cf6175f300bbad493cecdc96e6b0dd6f2fe

• Escape character "|" error (Linux command)

  22 mars 2013, par user1812668

  I'm trying to run a Linux command in Java.

  This is the command :

  "ffmpeg -i rtmp ://192.168.1.112/garage/stream26g -f mpegts -acodec libmp3lame -ar 48000 -ab 64000 -s 480x320 -r 30 -vcodec libx264 -b 544k -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -subq 5 -trellis 2 -refs 0 -coder 0 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt 200k -maxrate 544k -bufsize 544k -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 30 -qdiff 4 -level 30 -aspect 480:320 -g 30 -async 2 - | vod - 10 stream/stream26g/sample stream/stream26g/stream.m3u8 http://www.tshizerbia.com//video/ 5" ;

  But it gives me an error :

  Unable to find a suitable output format for |

  And I don't know what is the problem

  I used this to run the command

  Process p = Runtime.getRuntime().exec(command);

  If I put \\| in the string the message error is :

  Unable to find a suitable output format for |

  How can I escape this character ? Any ideas ?

• rtp mpg stream using jrtplib occurred error "illegal timestamp unit"

  13 avril 2013, par socket

  I wanna code rtp video stream sender and use VLC to play it in the LAN. I just have a mpeg4 file "a.mpg". And in my opinion, jrtplib can pack the packed well, so I think I can use sendPacket() function directly to send the mpg file. code below :

  #include 
  
  #include 
  
  #include 
  
  #include 
  
  #include 
  
  #include 
  
  #include 
  
  #include <iostream>
  
  #include
  
  
  
  using namespace jrtplib;
  
  using namespace std;
  
  int main()
  
  {
  
  RTPSession s;
  
  RTPSessionParams sparam;
  
  s.SetTimestampUnit(160.0/104857.0);//~
  
  RTPUDPv4TransmissionParams tparam;
  
  tparam.SetPortbase(9000);
  
  int status=s.Create(sparam,&amp;tparam);
  
  if(status&lt;0)
  
  {
  
      cerr&lt;&lt;"error 1"&lt;/~
  
  s.SetDefaultMark(false);
  
  s.SetDefaultTimestampIncrement(160);//~~
  
  
  
  unsigned char buf[160];
  
  FILE*f=fopen("a.mpg","rb");
  
  while(!feof(f))
  
  {
  
      fread(buf,1,160,f);
  
      RTPTime delay(0.02);//~
  
      bool ret=false;
  
      status=s.SendPacket(buf,160);
  
      if(status&lt;0)
  
      {
  
          cerr&lt;&lt;"error 3"&lt;code></iostream>

  Then, I compile it :

   g++ jrtpsend.cpp -ljrtp -I /usr/local/include/jrtplib3

  After that, I run the program but error occurred :

  kl@kl-ubuntu:~/code/RTP$ ./a.out 
  
  error 1
  
  Speficied an illegal timestamp unit for the the RTCP packet builder

  Actually, I didn't know timestamp exactly. When I use ffplay to play a.mpg showing that :

  Input #0, mpeg, from 'a.mpg':q=    0KB vq=    0KB sq=    0B f=0/0   
  
  Duration: 00:01:00.69, start: 0.529089, bitrate: 556 kb/s
  
  Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p, 640x480 [SAR 239:182 DAR 478:273],   104857 kb/s, 25 fps, 25 tbr, 90k tbn, 25 tbc
  
  Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16p, 128 kb/s

  2.46 A-V : -0.003 fd= 7 aq= 2KB vq= 33KB sq= 0B f=0/0

  So, I use the data 104857kb/s in the code (setTimestampUnit()), but I have no idea whether I use it correctly.
  All in all, please give me some suggestion how to run the program well or ...
  Best regards :-)