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• Ffmpeg compilation fails due to undefined symbol _x264_encoder_open_112 for architecture x86_64

  23 février 2012, par Saptarshi Biswas

  I am compiling ffmpeg on Snow Leopard from source. Using Macport is not an option since I have some custom modification in ffmpeg. The make commands are :

  $ ./configure --enable-gpl --enable-libmp3lame --enable-static \
  
              --disable-shared --enable-libx264 --enable-pthreads \
  
              --disable-doc --enable-avfilter
  
  $ make

  The error :

  CC  ffplay.o
  
  ffplay.c: In function ‘SDL_main’:
  
  ffplay.c:3157: warning: assignment discards qualifiers from pointer target type
  
  LD  ffplay_g
  
  Undefined symbols for architecture x86_64:
  
    "_x264_encoder_open_112", referenced from:
  
        _X264_init in libavcodec.a(libx264.o)
  
  ld: symbol(s) not found for architecture x86_64
  
  collect2: ld returned 1 exit status
  
  make: *** [ffplay_g] Error 1

  ---

  I have compiled libx264 from source, which went fine.

  $ cd x264-snapshot-20101228-2245; ./configure && make && sudo make install

  ... and it contains the symbol "_x264_encoder_open_112"

  $ nm ./libx264.a | grep _x264_encoder_open_112
  
  0000000000003ef0 T _x264_encoder_open_112
  
  000000000000d7b0 S _x264_encoder_open_112.eh

  What might be going wrong ?

• FFMPEG shell execution with PHP - Unusual Error Because of GCC

  9 février 2012, par trocker

  I've been trying to debug the PHP Script, but the error message that I receive is very unusual.

  • CP, MV , WHOAMI - all these commands work with shell_exec
  • FFMPEG is installed
  • apache user - nobody with read write execute permission for nogroup to /usr/bin/ffmpeg.
  • FFMPEG working fine in terminal.
  • GCCPP is installed and GCC package is also installed.
  • Working with shell PHP command (brock@ubuntu $ php runthis.php)

  Code I ran :

  exec('ffmpeg -i beep.mp3 -ac 1 -ar 48000 -ab 128k audio1.mp3 2>&1', $out, $rv);
  
  echo "output is:\n".implode("\n", $out)."\nexit code:$rv\n";

  I get the following error :

  output is: ffmpeg: /opt/lampp/lib/libgcc_s.so.1: version `GCC_4.0.0' not found (required by /usr/lib/libdirac_encoder.so.0) ffmpeg: /opt/lampp/lib/libgcc_s.so.1: version `GCC_4.2.0' not found (required by /usr/lib/libstdc++.so.6) exit code:1

  Can someone help me out here ?

• How to link Eclipse Indigo in Ubuntu 11 to FFMPEG 8 for C++

  16 octobre 2013, par AMB0027

  I have tried everything in the book and EVERYTHING I could find on how to do this and reinstalled and reconfigured and rebuilt several times to no avail. This is what I have. I've made FFMPEG on my Ubuntu VM and have the following code written :

  #include "libavcodec/avcodec.h"
  
  #include "libavformat/avformat.h"
  
  
  
  #include 
  
  #include <iostream>
  
  
  
  using namespace std;
  
  
  
  int main( int argc, char* argv[] ) {
  
  
  
      avcodec_register_all();
  
  
  
      return 0;
  
  }
  
  </iostream>

  This errors and says :

  /home/adam/workspace/MP4 Tools/Debug/../testDriver.cpp:19: undefined reference to     `avcodec_register_all()'
  
  collect2: ld returned 1 exit status

  I have included the libavcodec.a file. Project->Properties->GCC C++ Linker->Libraries->add "avcodec"

  Can anyone think of something I'm not doing or overlooking ? Thanks so much.