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• How to modify x264 source code to get motion search time [closed]

  21 octobre 2017, par Yicheng Li

  I am a new member of stack overflow, I hope you guys can help me solve this problem.
  I am now using x264 with ffmpeg to encode some raw video, I was asked how much time the motion search would cost in libx264 video coding. Therefore, I need to modify the code, I tried put the clock around the switch sentence in the encoder/me.c
  clock start

  clock end
  After compiling the source code and run a test,
  it shows that the time is very small and it seems I am actually getting the time each macro block spent on motion search.

  So, how should I modify the x264 source code to get the time duration in motion search.

  Big Thanks.

• libavcodec/libfdk-aacenc.c error while compiling ffmpeg

  27 août 2019, par Knot83

  I’m trying to install FFMPEG on my Raspeberry following this procedure : https://gist.github.com/adddog/d82581faf10d666d35b9771eaa65d5ac.

  While doing this step of the procedure :

  sudo apt-get install -y xserver-xorg-dev libxext-dev build-essential libxi-dev libglu1-mesa-dev libglew-dev
  
  wget http://www.ijg.org/files/jpegsrc.v9c.tar.gz
  
  tar xvfz jpegsrc*
  
  cd jpeg-9c
  
  ./configure --enable-shared --prefix=$CONFIGURE_PREFIX
  
  make -j4
  
  sudo make install

  I’m getting this error while compiling :

  libavcodec/libfdk-aacenc.c:289:34: error: ‘AACENC_InfoStruct {aka struct <anonymous>}’ has no member named ‘encoderDelay’; did you mean ‘nDelay’?
  
  </anonymous>

  Can you please help me ? Whithout solving this issue I cannot install FFMPEG at all.

  Thanks,
  Claudio

• Clang C Compiler 'class' keyword reserved ?

  21 septembre 2012, par user1689196

  Hi I am compiling ffmpeg using xcode, which I believe uses clang for compilation. In ffmpeg there is a struct with a member variable named 'class' I believe this is perfectly fine in C but clang is trying to parse it as a keyword. Any idea how to fix ? Basically the following in a cpp file will cause the error :

  extern C {
  
      typedef struct {
  
          int class;
  
      } SomeStruct;
  
  }

  It tries to interpret class as a keyword.

  FYI the file that is throwing the error in ffmpeg is libavcodec/mpegvideo.h and I need to include this to have access to the MpegEncContext struct to pull out motion map info.

  EDIT

  The above code sample was just to demonstrate the error. But perhaps its fixable in another way. In my actual code I have it like this :

  #ifdef __cplusplus
  
  extern "C" {
  
  #endif
  
  
  
      #include "libavcodec/mpegvideo.h"
  
      #include "libavformat/avformat.h"
  
  
  
  #if __cplusplus
  
  } //Extern C
  
  #endif

  How would I get that to include the two files as C files and not C++ ?

  Thanks