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• OpenGL (GLEW) + FFMPEG + VS2010 release build

  6 décembre 2015, par rickhik

  Currently I am working on a application that uses OpenGL (GLEW) and FFMPEG (libav’s) in Visual Studio 2010. The GLEW libs are included as Additional Libraries. The libav is set via a header file with extern "c" and pragma comment lib.

  The application opens a OpenGL window which draws some quads with textures via FFMPEG. I want to use this application for my volunteer job at a TV station of a Childrens Hospital.

  The problem I have is building a release version of my project. When I am building a Debug version it all works fine. I get a OpenGL Window with the quads. When I change Debug into Release and start the Debugger, it gives me the message "entry point of procedure __GLEW_EXT_framebuffer_object not found in DLL avcodec-56.dll", which is a bit strange to me because of the fact that the GLEW is not part of the avcodec-56.dll ?

  I can solve this issue by going to the project settings -> Linker -> Optimization and switch References from Yes(/OPT:REF) to No(/OPT:NOREF). I start the debugger to build the solution and it works as well. Now when I go to the Release folder of the project and start the build executable, the OpenGL Window stays black without giving me an error message.

  I hope you guys can help me out.

  @michael-iv I saw you had a similar issue

• How can I configure library dependencies in setup.py

  1er septembre 2021, par idontidontknowknow

  I want to pack a c++ project into python wheel package that user can install it by pip install myProject in different platform(like ubuntu, centos...), but the project is rely on a open source c library(ffmpeg).

  


  I try to generate ffmpeg.so, then load it with ctypes.CDLL("ffmpeg.so", mode=RTLD_GLOBAL), it works in ubuntu(the same version with my development platform but no ffmpeg environment), but not works in centos.

  


  What should I do that make the wheel package can pip and use in different platform without configuring dependencies again ?

  


• How to correctly install ffmpeg on windows XP ?

  11 avril 2012, par pipen

  I'm working on C++ project on Windows which involve FFmpeg library.
  The problem is that I can't include ffmpeg library to my project. I can't even run any of ffmpeg tutorials or examples. I'm always getting errors like the following :

  tutorial01.c:22:28: ffmpeg/avcodec.h: No such file or directory
  
  tutorial01.c:23:29: ffmpeg/avformat.h: No such file or directory

  and lots of errors like :

  tutorial01.c:33: error: `iFrame' undeclared (first use in this function)

  I found the tutorial with this instructions :

  //gcc -o tutorial01 tutorial01.c -lavformat -lavcodec -lz
  
  //to build (assuming libavformat and libavcodec are correctly installed
  
  //your system).

  After further searching I found out that I should get a static build library version from here :
  http://ffmpeg.zeranoe.com/builds/
  Then I installed this library following these instructions :

  1. Get the latest build from the arrozcru autobuilds page
  2. Unzip the folder into C :/Program Files/ffmpeg
  3. Add C :/Program Files/ffmpeg/bin to your system’s PATH environment variable

  But I still have compilation errors of the same kind.
  So, it seems it was not correct installation.

  What should I do to connect ffmpeg library to my project on Windows ?