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• FFMpeg Cygwin Compilation

  22 janvier 2021, par John Ernest

  I'm trying to compile ffmpeg with the following :

  


  ./configure --disable-stripping --enable-debug=3 --extra-cflags="-g" --disable-optimizations


  


  However, I'm getting an undefined reference to GUID_NULL :

  


  $ make
LD      ffmpeg_g.exe
/usr/lib/gcc/x86_64-pc-cygwin/9.3.0/../../../../x86_64-pc-cygwin/bin/ld: libavdevice/libavdevice.a(dshow_enummediatypes.o):dshow_enummediatypes.c (.rdata$.refptr.GUID_NULL[.refptr.GUID_NULL]+0x0): undefined reference to `GUID_NULL'
collect2: error: ld returned 1 exit status
make: *** [Makefile:114: ffmpeg_g.exe] Error 1


  


  However, my libavdevice.pc reads :

  


  prefix=/usr/local
exec_prefix=${prefix}
libdir=/usr/local/lib
includedir=/usr/local/include

Name: libavdevice
Description: FFmpeg device handling library
Version: 58.11.101
Requires: libavfilter >= 7.87.100, libswscale >= 5.8.100, libavformat >= 58.48.100, libavcodec >= 58.96.100, >Requires.private:
Conflicts:
Libs: -L${libdir}  -lavdevice -lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi -lgdi32 -lm -lvfw32 -lxc>Libs.private:
Cflags: -I${includedir}


  


  Note the libs line is cut off by nano, but includes -luuid. Any ideas ?

  


• FFmpeg MSVC Compilation stuck

  10 mai 2017, par Earinor

  For several days now I try to build the FFmpeg Libraries. I’m using Windows7 64 Bit and MSVC2010. I followed this guide : https://trac.ffmpeg.org/wiki/CompilationGuide/MSVC

  I got rid of a view errors and configure is working finally. But when I try make, it runs for like half an hour and then gets stuck. It won’t proceed, I kept it running over night and nothing happend. I also tried different compiler options but it gets stuck every time at the same point.

  ffv1dec.o_converted.c
  
  d:\cpplibraries\ffmpeg-master\libavcodec\get_bits.h(308) : warning C4101: 're_cache' : unreferenced local variable
  
  d:\cpplibraries\ffmpeg-master\libavcodec\golomb.h(360) : warning C4245: '=' : conversion from 'int' to 'unsigned int', signed/unsigned mismatch

  I also tried setting up a minGW64 Msys2 Environment but have the same issue there.
  I also tried another setup but when I get rid of some errors I always get stuck at the exact same position.

  The cl.exe is running and is using memory but nothing happens.

  I also get a ton of warnings like conversions from int to unsigned int, Makro redefinitions, etc.

  I have no idea where to look to fix this, so I would appreciate some help.

• Compilation errors with FFmpeg library on Qt

  23 septembre 2016, par Meugiwara

  I’m trying to compile a simple program on Qt with this code below.

  #include <qcoreapplication>
  
  
  
  #define __STDC_CONSTANT_MACROS
  
  
  
  extern "C"
  
  {
  
      #include "libswresample/swresample.h"
  
      #include "libavformat/avformat.h"
  
      #include "libavcodec/avcodec.h"
  
      #include "SDL2/SDL.h"
  
  }
  
  
  
  int main(int argc, char *argv[])
  
  {
  
      QCoreApplication a(argc, argv);
  
      av_register_all();
  
      return a.exec();
  
  }
  
  </qcoreapplication>

  But, I have too many errors and I don’t understand why because my .pro file is like that.

  QT += core
  
  QT -= gui
  
  
  
  CONFIG += c++11
  
  
  
  TARGET = O2B
  
  CONFIG += console
  
  CONFIG -= app_bundle
  
  
  
  TEMPLATE = app
  
  
  
  SOURCES += main.cpp
  
  
  
  INCLUDEPATH += C:\Users\Hugo\Documents\BASELFI\include
  
  
  
  LIBS += -LC:\Users\Hugo\Documents\BASELFI\lib
  
  LIBS += -lavcodec -lavdevice -lavfilter -lavformat -lavutil -lpostproc -SDL2 -lSDL2main -lswresample -lswscale

  As you can see, my .pro file is normal and can’t cause errors below.

  http://pastebin.com/sz7uymR1

  May someone help me please ? Thank you for reading.