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• ffmpeg shared libraries setup on visual studio 2013

  19 décembre 2017, par Hyun Jung

  Setting up ffmpeg shared libraries that are downloaded from ffmpeg zenaroe (https://ffmpeg.zeranoe.com/builds/) for windows_64bit. The IDE is VS2013.

  I downloaded dev and shared build for windows 64bit.

  And followed steps like bellow but when building, linker error happens. The object file is created so compiling seems done. But there seems to be a problem finding referenced functions at the linking stage.

  1. Create win32 project and main.cpp
  2. Copy ffmpeg_dev’s include and lib folders to solution directory.
  3. Open project properties and add the include dir and the lib dir.
  4. Add lib names to linker input.

  5. Build

     main.cpp

     extern "C"{
     
     #include 
     
     }
     
     int main(void){
     
     
     
         av_register_all();
     
     
     
         return 0;
     
     }

  The linker error is :

  LNK2019 unresloved external symbol _av_register_all referenced in function _main.

• Can't link FFmpeg in Visual Studio 2013

  22 février 2016, par Sir DrinksCoffeeALot

  I’m struggling with this for past 3-4 days with barely any progress. I’ve downloaded "dev" and "shared" archives and extracted them. "Dev" archive has .lib and .h files and "Shared" has .dll files needed for running app. These are the steps that i’ve done linking-wise :

  Project -> Properties -> Configuration Properties -> VC++ Directories -> Include Directories -> ...\ dev\ include

  Project -> Properties -> Configuration Properties -> VC++ Directories -> Library Directories -> ...\ dev\ lib

  Project -> Properties -> Configuration Properties -> C/C++ -> General -> Additional Include Directories -> ...\ dev\ include

  Project -> Properties -> Configuration Properties -> Linker -> General -> Additional Library Directories -> ...\ dev\ lib

  Project -> Properties -> Configuration Properties -> Linker -> Input -> Additional Dependencies -> avcodec.lib ... swscale.lib

  And when i try to build it i get following error :

  Error 1 error LNK2019: unresolved external symbol _avcodec_register_all referenced in function _main...

  I have no idea why,somehow .lib are not getting linked or something or i’ve done something wrong. It’s getting really frustrating and ffmpeg is crucial in project that i’m working on, basicly i can’t do anything without it. So please if someone could point me in right direction i would aprreciate it very much.

  This is the example that im trying to build.

  #include 
  
  extern "C"
  
  {
  
  
  
  #include "libavcodec\avcodec.h"
  
  }
  
  
  
  
  
  #pragma comment(lib, "avcodec.lib")
  
  
  
  int main()
  
  {
  
      printf("Trying avcodec_register_all... ");
  
      avcodec_register_all();
  
      printf("Done.\n");
  
      return 0;
  
  }

  Thank you in advance.

• Using ffmpeg with Visual Studio 2013 and C

  19 juin 2016, par user5000935

  I’m try
  main.c
  av_register_all() ;

  AVFormatContext *pFormatCtx = NULL;
  
  
  
  // Open video file
  
  if (avformat_open_input(&pFormatCtx, argv[1], NULL, NULL) != 0)
  
      return -1; // Couldn't open file
  
  
  
  if (avformat_find_stream_info(pFormatCtx, NULL) < 0)
  
      return -1; // Couldn't find stream information
  
  }

  • I’ve added the include (C :\ffmpeg\include) directory to my C/C++ > General > Additional Include Directories ;
  • I’ve added
    I’m using "Zeranoe FFmpeg Build Version : git-5911eeb (2015-10-08)". I tried both 32/64bits versions as said in another question here in SO.

  These are the errors I’m getting :

  Error   3   error C2143: syntax error : missing ';' before '{'  c:\ffmpeg\include\libavutil\error.h 110 1   FFMpeg Test
  
  Error   6   error C2143: syntax error : missing ';' before '{'  c:\ffmpeg\include\libavutil\mem.h   94  1   FFMpeg Test
  
  Error   9   error C2143: syntax error : missing ';' before '{'  c:\ffmpeg\include\libavutil\mem.h   229 1   FFMpeg Test
  
  Error   12  error C2143: syntax error : missing ';' before '{'  c:\ffmpeg\include\libavutil\mem.h   338 1   FFMpeg Test
  
  Error   15  error C2143: syntax error : missing ';' before '{'  c:\ffmpeg\include\libavutil\rational.h  54  1   FFMpeg Test
  
  Error   18  error C21in formal parameter list   c:\ffmpeg\include\libavutil\mem.h   338 1   FFMpeg Test
  
  Error   20  error C2085: 'av_q2d' : not in formal parameter list    c:\ffmpeg\include\libavutil\rational.h  80  1   FFMpeg Test
  
  Error   8   error C2085: 'av_mallocz_array' : not in formal parameter list  c:\ffmpeg\include\libavuormal parameter list    c:\ffmpeg\include\libavutil\rational.h  54  1   FFMpeg Test