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• Use modern avconv syntax for codec selection in documentation and tests

  18 octobre 2012, par Diego Biurrun

  Use modern avconv syntax for codec selection in documentation and tests
  

  • [DBH] doc/encoders.texi
  • [DBH] doc/faq.texi
  • [DBH] doc/filters.texi
  • [DBH] tests/fate-run.sh
  • [DBH] tests/fate/demux.mak
  • [DBH] tests/fate/h264.mak
  • [DBH] tests/fate/microsoft.mak
  • [DBH] tests/fate/mp3.mak
  • [DBH] tests/fate/mpc.mak
  • [DBH] tests/fate/utvideo.mak
  • [DBH] tests/fate/video.mak
  • [DBH] tests/fate/vqf.mak
  • [DBH] tests/lavf-regression.sh

• COMPILATION ISSUES : FFMPEG CODE ON VS2012

  7 novembre 2013, par user2964667

  I have downloaded FFMPEG source code(c code) by the following link

  http://ffmpeg.zeranoe.com/builds/

  After that,I have completed the configuration part then i was generated and linked the library files *[avcodec-54.lib,avdevice-54.lib,avfilter-3.lib,avformat-54.lib,avutil-52.lib,swresample-0.lib,swscale-2.lib ]*on Microsoft Visual Studio C++ by creating a new project by including all .c and header files.

  Referred Links :
  http://www.ffmpeg.org/platform.html#Microsoft-Visual-C_002b_002b-or-Intel-C_002b_002b-Compiler-for-Windows

  When I was compiling on Visual studio 2010... I am getting more than 300 errors under all the files libavcodec,libavdevice,libavfilter,libavformat,libavresample,libavutil,libpostproc,libswresample,libswscale like

  ASM ERRORS :

  error C2400: inline assembler syntax error in 'opcode'; found 'data type'
  
  error C2065: '__asm__' : undeclared identifier
  
  error C2143: syntax error : missing ';' before 'volatile'

  SYNTAX ERRORS :

  error C2143: syntax error : missing '}' before '.'
  
  error C2143: syntax error : missing ';' before '.'
  
  error C2059: syntax error : '.'
  
  error C2143: syntax error : missing ';' before '}'
  
  error C2059: syntax error : '}'
  
  error C2143: syntax error : missing ';' before '{'
  
  error C2447: '{' : missing function header (old-style formal list?)
  
  error C2059: syntax error : ','
  
  error C2143: syntax error : missing ';' before '{'
  
  error C2447: '{' : missing function header (old-style formal list?)

  Please anyone let me know how to compile a ffmpeg c code on vs2010 successfully.

• Inputting Audio Stream to FFMPEG

  5 avril 2018, par Wijaya

  I’m building a real time chat application with C# and ffmpeg.exe. My requirement is to get a memory stream from Microsoft Speech API and feed it to ffmpeg process in real time. I can take a memory stream from Microsoft Speech API. I’m using following code to create the memory stream.

          using (MemoryStream stream = new MemoryStream())
  
          {
  
              MemoryStream streamAudio = new MemoryStream();
  
              System.Media.SoundPlayer m_SoundPlayer = new System.Media.SoundPlayer();
  
              _speechSynthesizerVisemesSender.SetOutputToWaveStream(streamAudio);
  
              _speechSynthesizerVisemesSender.SetOutputToNull();
  
              stream.WriteTo(proc.StandardInput.BaseStream);
  
          }   

  I’m already using another datapipe with another command to feed video content to ffmpeg. But I couldn’t find a stable solution to feed audio through a datapipe. This article briefly explains about audio datapipe. I’m using following command to stream audio.

  "ffmpeg -re -f s16le -i pipe:wav -f mpegts udp://127.0.0.1:1234"

  But it is not working with the datapipe. If I try the command with mp3 or wav file, it works.