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• ubuntu "make" can't find standard c libraries

  22 mai 2018, par Karthik Uday Kiran

  For the past few days, I was trying to configure ffmpeg for android in ubunut system.

  I’ve configured the ffmpeg but when i try to make using the command
  make -j3

  The error read :

  No such file or directory #include
  enter image description here

• runtime error when linking ffmpeg libraries in qt creator

  6 juillet 2012, par dxthegreat

  I'm quite new around here but i hear that if you want a question answered, stackoverflow is the place to ask it >.<. So i hope that my question isn't too trivial that everyone will get annoyed at my lack of research (I've tried googling for two days already D= no progress !)
  I've also asked this question in the Qt forums, but i figured i'd ask here too.

  so...

  For the last few days I’ve been fiddling around with opengl and the like, trying to write a video player.

  However, when i try to import the ffmpeg libraries (avcodec, avformat, avutils etc), an error occurs on runtime (the program compiles fine). When compiled and run in debug mode, the error message gives me only a memory address and error code 135 (DLL not found).

  This error occurs when i include a function from those libraries in my code (e.g. av_register_all()) and it occurs regardless of whether the function is actually called.

  So i’m thinking that I’m doing something wrong when linking these libraries.
  I’m currently using :
  Windows vista (32bit),
  Qt creator 2.4.1 based on Qt 4.7.4 (32bit),
  Zeranoe’s FFmpeg build git-3233ad4 (2012-06-30)

  My .pro file consists of :

  QT       += core gui opengl
  
  
  
  TARGET = test
  
  TEMPLATE = app
  
  
  
  
  
  SOURCES += main.cpp\
  
          mainwindow.cpp \
  
      glwidget.cpp
  
  
  
  HEADERS += mainwindow.h \
  
      glwidget.h \
  
  
  
  FORMS    += mainwindow.ui
  
  
  
  
  
  LIBS += -L"$$_PRO_FILE_PWD_/libraries/ffmpeg/libs/" -lavcodec -lavformat -lavutil
  
  INCLUDEPATH += libraries/ffmpeg/includes

  I’ve tried many variations to the LIBS += line and checked my filepath many times. However, the DLL not found error occurs in all of these variations =(.

  Is there something I’m forgetting when doing these includes ?

  Thanks in advance >.<,
  (young and naive) aspiring dev

• StackOverflowException with Process

  4 juin 2015, par user3633222

  I have a process, which runs in a console app. It runs forever.

  After a couple of days the app crashes with a StackOverflowException.

  The essence of the app is where I spin up a Process with FFMpeg.exe and creates a sceenshot of a video stream. It works very good but only for a few days at the time.

  I am pretty sure it has to do with the disposal of the FFMpeg or some internal Process stuff.

  Here is the code

                  using ( Process ffmpegProcess = new Process() ) {
  
  
  
                      //arguments for running ffmpeg
  
                      ffmpegProcess.StartInfo.UseShellExecute = false;
  
                      ffmpegProcess.StartInfo.CreateNoWindow = true;
  
                      ffmpegProcess.StartInfo.RedirectStandardOutput = true;
  
  
  
                      //specific for our screenshots
  
                      ffmpegProcess.StartInfo.FileName = string.Concat( Environment.CurrentDirectory, Path.DirectorySeparatorChar, ffmpegProgramName );
  
  
  
                      try {
  
                          //todo: log this stopwatch somewhere perhaps
  
                          processWatch.Start();
  
  
  
                          //set arguments every time we want to create a new screen shot
  
                          ffmpegProcess.StartInfo.Arguments = string.Format( @"-y -i {0}{1} -threads 0 -ss 00:00:01.000 -f image2 -s 620x349 -vframes 1 ../../web/{2}.jpg", server, streamPath, slug );
  
                          ffmpegProcess.Start();
  
                          ffmpegProcess.WaitForExit( 500 );
  
  
  
                          Console.WriteLine( slug );
  
                          Console.WriteLine( processWatch.Elapsed );
  
  
  
                          processWatch.Reset();
  
                          runCount++;
  
                          cacheIndexer++;
  
  
  
                          //lets see how many spins we've had!
  
                          Console.WriteLine( string.Format( "SERVER CACHE INDEX : {0}", cacheIndexer ) );
  
                          Console.WriteLine( string.Format( "RUN : {0}", runCount ) );
  
                          Console.WriteLine( Environment.NewLine );
  
  
  
                      } catch ( Exception ex ) {
  
                          //Console.WriteLine( "Ex " + ex );
  
                      }
  
                  }