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• Compiling FFmpeg staticly using NDK error - Not position independent executable

  27 février 2017, par David Barishev

  I have been trying to compile ffmpeg into a static library in order to use it in my android application, but i couldn’t get it to work.

  Im working with FFmpeg 3.2.4, and ndk r13b, using bash on windows 10(Ubuntu 14.04).

  Here is what i did :

  • I made a stand alone toolchain for x86_64 and api 21 using :
    python make_standalone_toolchain.py --api 21 --arch x86_64 --install-dir {}

  • Made a configuration script :

    ./configure \
    
    --target-os=android                                     \
    
    --arch=x86_64                                              \
    
    --prefix=/home/david/ffmpeg_x86_64_build                          \
    
    --cross-prefix=/home/david/x86_64_toolchain/bin/x86_64-linux-android-\
    
    --sysroot=/home/david/x86_64_toolchain/sysroot                    \
    
    --enable-cross-compile                                  \
    
    --pkg-config-flags="--static"                           \
    
    --enable-ffmpeg                                         \
    
    --disable-ffplay                                        \
    
    --disable-ffprobe                                       \
    
    --disable-ffserver                                      \
    
    --disable-doc                                           \
    
    --disable-htmlpages                                     \
    
    --disable-manpages                                      \
    
    --disable-podpages                                      \
    
    --disable-txtpages                                      \
    
    --extra-cflags="-fPIC"                                  \
    
    --extra-cxxflags="-fPIC"
    
    --disable-shared --enable-static \
    
    --enable-yasm
    
    
    
    make
    
    make install

  It produced an FFmpeg executable, however when i ran it on my API 23 emulator, i got an error message :error: only position independent executables (PIE) are supported.
  Even that i used -fPic

  How can i fix it ? Also i’m not sure about my configuration, there wasn’t up to date sources on how to compile it correctly for every ABI (arm,arm64,x86,x86_64,mips,mips64) that i need for my application.
  I have seen many script, and im not too familiar with compiling native code, so i wasn’t sure what settings i need, for example like C flags and etc.

  To be precise on how i tried to configure FFmpeg :

  • I need a static library
  • I Only need the ffmpeg command line utility
  • I want to compile the library for every ABI i listed above.This configuration tried to compile for x86_64.
  • Running on android of course

  I would greatly appreciate some help on how to configure and compile this correctly.

• Compiling FFmpeg staticly using NDK error - Not position independent executables executable

  27 février 2017, par David Barishev

  I have been trying to compile ffmpeg into a static library in order to use it in my android application, but i couldn’t get it to work.

  Im working with FFmpeg 3.2.4, and ndk r13b, using bash on windows 10(Ubuntu 14.04).

  Here is what i did :

  • I made a stand alone toolchain for x86_64 and api 21 using :
    python make_standalone_toolchain.py --api 21 --arch x86_64 --install-dir {}

  • Made a configuration script :

    ./configure \
    
    --target-os=android                                     \
    
    --arch=x86_64                                              \
    
    --prefix=/home/david/ffmpeg_x86_64_build                          \
    
    --cross-prefix=/home/david/x86_64_toolchain/bin/x86_64-linux-android-\
    
    --sysroot=/home/david/x86_64_toolchain/sysroot                    \
    
    --enable-cross-compile                                  \
    
    --pkg-config-flags="--static"                           \
    
    --enable-ffmpeg                                         \
    
    --disable-ffplay                                        \
    
    --disable-ffprobe                                       \
    
    --disable-ffserver                                      \
    
    --disable-doc                                           \
    
    --disable-htmlpages                                     \
    
    --disable-manpages                                      \
    
    --disable-podpages                                      \
    
    --disable-txtpages                                      \
    
    --extra-cflags="-fPIC"                                  \
    
    --extra-cxxflags="-fPIC"
    
    --disable-shared --enable-static \
    
    --enable-yasm
    
    
    
    make
    
    make install

  It produced an FFmpeg executable, however when i ran it on my API 23 emulator, i got an error message :error: only position independent executables (PIE) are supported.
  Even that i used -fPic

  How can i fix it ? Also i’m not sure about my configuration, there wasn’t up to date sources on how to compile it correctly for every ABI (arm,arm64,x86,x86_64,mips,mips64) that i need for my application.
  I have seen many script, and im not too familiar with compiling native code, so i wasn’t sure what settings i need, for example like C flags and etc.

  To be precise on how i tried to configure FFmpeg :

  • I need a static library
  • I Only need the ffmpeg command line utility
  • I want to compile the library for every ABI i listed above.This configuration tried to compile for x86_64.
  • Running on android of course

  I would greatly appreciate some help on how to configure and compile this correctly.

• Calling python script using a php script accessed by the browser

  16 novembre 2014, par lfalmeida

  I have a php script which will receives uploaded videos and I would like to convert these videos using ffmpeg.

  I created a python script that receives parameters from php and calls ffmpeg to do the conversion.

  index.php

  <?php
  
  
  
  $data = array('filePath' => 'video.mov');
  
  
  
  $result = shell_exec('/usr/bin/python /home/fernando/Workspace/lab1/public_html/converter.py ' . escapeshellarg(json_encode($data)));

  converter.py

  #!/usr/bin/env python
  
  
  
  import os, sys, json, subprocess, string, random
  
  
  
  class Converter():
  
  
  
  WORK_DIR = '/home/fernando/Workspace/lab1/public_html'
  
  DESTINATION_DIR = '/home/fernando/Workspace/lab1/public_html/videos/'
  
  NEW_AUDIO = 'audio.mp3'
  
  
  
  def __init__(self, data):
  
      try:
  
          os.chdir(self.WORK_DIR)
  
          self.arg = data
  
      except:
  
          print "ERROR"
  
          sys.exit(1)     
  
  
  
  
  
  def generateId():
  
      return ''.join(random.choice(string.ascii_uppercase + string.digits + string.ascii_lowercase ) for _ in range(12))      
  
  
  
  
  
  def convertVideo(self, type):
  
  
  
      convertedFileName = self.DESTINATION_DIR + self.generateId() + '.' + type
  
  
  
      typesDic = {
  
                  'mp4': ['/usr/bin/ffmpeg', '-loglevel', 'quiet', '-i', self.arg['filePath'], '-i', self.NEW_AUDIO, '-map', '0:0', '-map', '1', '-shortest', '-codec', 'copy', convertedFileName, '-y'], 
  
                  'ogv': ['/usr/bin/ffmpeg', '-loglevel', 'quiet', '-i', self.arg['filePath'], '-i', self.NEW_AUDIO, '-map', '0:0', '-map', '1', '-shortest', '-vcodec', 'libtheora', '-acodec', 'libvorbis',  convertedFileName, '-y'] 
  
                 }
  
  
  
      sp = subprocess.Popen(typesDic[type], shell=True)
  
  
  
      out, err = sp.communicate()
  
  
  
      if err:
  
          return {'status': 'error'}
  
  
  
      return {'status': 'success', 'filename': convertedFileName}
  
  
  
  
  
  
  
  
  
  data = json.loads(sys.argv[1])
  
  
  
  c = Converter(data)
  
  print c.convertVideo('mp4')
  
  print c.convertVideo('ogv')

  These codes are working the way I need, but only if I call them
   via the command line.
  Ex : $ php index.php
  ou : $ ./converter.py '{"fileName": "video.avi"}'

  If I access via browser, which was my main intention, does not work.

  I wonder what is wrong ?
  You can do this via browser ?
  Would have a better approach ?
  

  edited :
  Output from apache error log

  Use -h to get full help or, even better, run 'man ffmpeg'

  ffmpeg version 1.2.6-7:1.2.6-1 trusty1 Copyright (c) 2000-2014 the FFmpeg developers
  built on Apr 26 2014 18:52:58 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  configuration : —arch=amd64 —disable-stripping —enable-avresample —enable-pthreads —enable-runtime-cpudetect —extra-version=’7:1.2.6-1 trusty1’ —libdir=/usr/lib/x86_64-linux-gnu —prefix=/usr —enable-bzlib —enable-libdc1394 —enable-libfreetype —enable-frei0r —enable-gnutls —enable-libgsm —enable-libmp3lame —enable-librtmp —enable-libopencv —enable-libopenjpeg —enable-libopus —enable-libpulse —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-vaapi —enable-vdpau —enable-libvorbis —enable-libvpx —enable-zlib —enable-gpl —enable-postproc —enable-libcdio —enable-x11grab —enable-libx264 —shlibdir=/usr/lib/x86_64-linux-gnu —enable-shared —disable-static
  libavutil 52. 18.100 / 52. 18.100
  libavcodec 54. 92.100 / 54. 92.100
  libavformat 54. 63.104 / 54. 63.104
  libavdevice 53. 5.103 / 53. 5.103
  libavfilter 3. 42.103 / 3. 42.103
  libswscale 2. 2.100 / 2. 2.100
  libswresample 0. 17.102 / 0. 17.102
  libpostproc 52. 2.100 / 52. 2.100
  Hyper fast Audio and Video encoder
  usage : ffmpeg [options] [[infile options] -i infile]... [outfile options] outfile...

  Use -h to get full help or, even better, run ’man ffmpeg’
  ffmpeg version 1.2.6-7:1.2.6-1 trusty1 Copyright (c) 2000-2014 the FFmpeg developers
  built on Apr 26 2014 18:52:58 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  configuration : —arch=amd64 —disable-stripping —enable-avresample —enable-pthreads —enable-runtime-cpudetect —extra-version=’7:1.2.6-1 trusty1’ —libdir=/usr/lib/x86_64-linux-gnu —prefix=/usr —enable-bzlib —enable-libdc1394 —enable-libfreetype —enable-frei0r —enable-gnutls —enable-libgsm —enable-libmp3lame —enable-librtmp —enable-libopencv —enable-libopenjpeg —enable-libopus —enable-libpulse —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-vaapi —enable-vdpau —enable-libvorbis —enable-libvpx —enable-zlib —enable-gpl —enable-postproc —enable-libcdio —enable-x11grab —enable-libx264 —shlibdir=/usr/lib/x86_64-linux-gnu —enable-shared —disable-static
  libavutil 52. 18.100 / 52. 18.100
  libavcodec 54. 92.100 / 54. 92.100
  libavformat 54. 63.104 / 54. 63.104
  libavdevice 53. 5.103 / 53. 5.103
  libavfilter 3. 42.103 / 3. 42.103
  libswscale 2. 2.100 / 2. 2.100
  libswresample 0. 17.102 / 0. 17.102
  libpostproc 52. 2.100 / 52. 2.100
  Hyper fast Audio and Video encoder
  usage : ffmpeg [options] [[infile options] -i infile]... [outfile options] outfile...

  Use -h to get full help or, even better, run ’man ffmpeg’