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• how to run and install phpize

  11 juin 2013, par Hrishikesh Choudhari

  I have been meaning to install ffmpeg as an extension to my php setup. So before I can install it, I need to phpize it. I installed php5-dev by sudo apt-get install php5-dev But now when I run phpize I get the following error :

  phpize
  
  Cannot find config.m4. 
  
  Make sure that you run '/usr/bin/phpize' in the top level source directory of the module

  The location of my php.ini is /usr/local/zend/etc/php.ini

  From another online resource i tried this

  sudo apt-get install autoconf automake libtool m4

  But all of them are already installed.

  Locate config.m4 didnt return anything.

  Any pointers here how I can get phpize and thus, ffmpeg up and running ?

• How do I use the Windows version of gstreamer and wireshark to take a .pcap file and extract H.264 from RTP ?

  5 mars 2015, par user1118047

  I have a pcap file containing a capture of RTP with H.264 video and SIP with SDP. I would like to be able to extract the video from the RTP stream and save it to a file. (h264video.mkv or something similar)

  I have started looking at gstreamer as a possible solution for this but I’m having trouble troubleshooting any of the output I receive from the program.

  gst-launch -v     filesrc location=testh264.rtp     
  
  ! application/x-rtp,media=video,clock-rate=90000,payload=123,encoding-name=H264     
  
  ! rtph264depay                   
  
  ! ffdec_h264                     
  
  ! xvimagesink

  Here is an example of something I’ve tried but I’m not able to get through rtph264depay because the file I’m sending is of invalid format. What can I do to extract the h264 payload from my pcap file for usage with gstreamer/rtph264depay ?

• Weird and unpredictable crash when using libx264 cross-compiled with MinGW

  2 mars 2012, par Daniel

  I'm working on a C++ project using Visual Studio 2010 on Windows. I'm linking dynamically against x264 which I built myself as a shared library using MinGW following the guide at

  http://www.ayobamiadewole.com/Blog/Others/x264compilation.aspx

  The strange thing is that my x264 code is working perfectly sometimes. Then when I change some line of code (or even change the comments in the file !) and recompile everything crashes on the line

  encoder_ = x264_encoder_open(&param);

  With the message

  Access violation reading location 0x00000000

  I'm not doing anything funky at all so it's probably not my code that is wrong but I guess there is something going wrong with the linking or maybe something is wrong with how I compiled x264.

  The full initialization code :

  x264_param_t param = { 0 };
  
  if (x264_param_default_preset(&param, "ultrafast", "zerolatency") < 0) {
  
    throw KStreamerException("x264_param_default_preset failed");
  
  }
  
  
  
  param.i_threads = 1;
  
  param.i_width = 640;
  
  param.i_height = 480;
  
  param.i_fps_num = 10;
  
  param.i_fps_den = 1;
  
  
  
  encoder_ = x264_encoder_open(&param); // <-----
  
  if (encoder_ == 0) {
  
    throw KStreamerException("x264_encoder_open failed");
  
  }
  
  
  
  x264_picture_alloc(&pic_, X264_CSP_I420, 640, 480);

  Edit : It turns out that it always works in Release mode and when using superfast instead of ultrafast it also works in Debug mode 100%. Could it be that the ultrafast mode is doing some crazy optimizations that the debugger doesn't like ?