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• What causes "double free or corruption" and "invalid pointer" in javacpp - ffmpeg ?

  7 septembre 2016, par Jiro Matchonson

  I use https://github.com/bytedeco/javacpp-presets/tree/master/ffmpeg

  <dependency>
  
        <groupid>org.bytedeco.javacpp-presets</groupid>
  
        <artifactid>ffmpeg</artifactid>
  
        <version>3.1.2-1.2</version>
  
  </dependency>

  When i am calling avformat_open_input/avformat_close_input i randomly (never at first call) get those errors :

   Error in `/usr/lib/jvm/java-8-oracle/bin/java': double free or corruption (out): 0x00007fe79c194aa0

  or

  Error in `/usr/lib/jvm/java-8-oracle/bin/java': double free or corruption (!prev): 0x00007fe51c3ffb60

  or

  Error in `/usr/lib/jvm/java-8-oracle/bin/java': double free or corruption (fasttop): 0x00007fcdc40fe4a0

  I cant find out how to solve this, please help.

  There is my implementation :

      private static void registerComponents() {
  
          if (!componentsRegistered) {
  
              componentsRegistered = true;
  
              av_register_all();
  
          }
  
      }
  
  
  
      public static void decodeFrame(ByteBuffer frameData) {
  
          registerComponents();
  
  
  
          AVFormatContext pFormatCtx = avformat_alloc_context();
  
          int i, videoStream;
  
          AVCodecContext pCodecCtx = null;
  
          AVCodec pCodec = null;
  
          AVFrame pFrame = null;
  
          AVFrame pFrameRGB = null;
  
  
  
          int[] frameFinished = new int[1];
  
          int numBytes;
  
          BytePointer buffer = null;
  
  
  
          AVDictionary    optionsDict = null;
  
          SwsContext      sws_ctx = null;
  
  
  
          AVIOContext ioContext = avio_alloc_context(new BytePointer(frameData), frameData.capacity(), 0, null, null, null, null);
  
          pFormatCtx.pb(ioContext);
  
  
  
          if (avformat_open_input(pFormatCtx, "", null, null) < 0) {
  
              logger.error(MarkerFactory.getMarker("ffmpeg"), "Problem with load video from memory.");
  
              return;
  
          }
  
  
  
         avformat_close_input(pFormatCtx);       
  
      }

• libavdevice.so.57 : failed to map segment from shared object : Permission denied"

  10 septembre 2016, par user3579130

  I have successfully installed ffmpeg ver. 4.4.7 on centos, with shared enabled as such :

  [root@localhost ~]# ffmpeg
  
  ffmpeg version N-81555-g496d97f Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-17)
  
    configuration: --prefix=/usr/local/ffmpeg_build --extra-cflags=-I/usr/local/ffmpeg_build/include --extra-ldflags=-L/usr/local/ffmpeg_build/lib --bindir=/usr/local/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-shared
  
    libavutil      55. 29.100 / 55. 29.100
  
    libavcodec     57. 54.102 / 57. 54.102
  
    libavformat    57. 48.102 / 57. 48.102
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 60.100 /  6. 60.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  However, when I run in php, through exec I get

  "/usr/local/bin/ffmpeg : error while loading shared libraries :
  libavdevice.so.57 : failed to map segment from shared object :
  Permission denied"

  I know the web server executes the command as user ’apache’ and not root, but I installed ffmpeg in /usr/local/ffmpeg_build for that specific reason, so that the regular users can use ffmpeg.

  What did I miss ? What does this error mean ?

• Compiling FFmpeg on OSX - "speex not found using pkg-config"

  19 septembre 2016, par n4zArh

  I recently had few problems with FFmpeg and compiling it to get library. I managed to get through all of them, however recently I found out I need to add Speex decoder (and possibly encoder) to my project. I got Speex by sources, ./configure and make;make install (later - as I had problems - I also used Brew to download Speex). I added --enable-libspeex to my configure script and every time I try to use it I get "Speex not found using pkg-config" error.

  I am sure that there’s Speex files at /usr/local/include and lib directories, I also added those two as CFLAGS and LDFLAGS, I tried building Speex with or without using --prefix (both pointing to /usr/ and /usr/local/), I tried modifying FFmpeg’s configure file (require_pkg_config with Speex call), but no matter what I try to do I fail to build it - every time with same error.

  Long story short - how to build FFmpeg with Speex decoder on OSX ? I read somewhere that libspeex-dev might be needed, but it’s available through apt-get and not Brew (unless I screwed something up).

  My build script :

  #!/bin/bash
  
  
  
  if [ "$NDK" = "" ]; then
  
      echo NDK variable not set, assuming ${HOME}/android-ndk
  
      export NDK=${HOME}/Library/Android/sdk/ndk-bundle
  
  fi
  
  
  
  SYSROOT=$NDK/platforms/android-16/arch-arm
  
  # Expand the prebuilt/* path into the correct one
  
  TOOLCHAIN=`echo $NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64`
  
  export PATH=$TOOLCHAIN/bin:$PATH
  
  
  
  rm -rf build/ffmpeg
  
  mkdir -p build/ffmpeg
  
  cd ffmpeg
  
  
  
  # Don't build any neon version for now
  
  for version in armv5te armv7a; do
  
  
  
  DEST=../build/ffmpeg
  
  FLAGS="--target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm"
  
  FLAGS="$FLAGS --sysroot=$SYSROOT"
  
  FLAGS="$FLAGS --enable-shared --disable-symver"
  
  FLAGS="$FLAGS --enable-small"
  
  FLAGS="$FLAGS --disable-everything"
  
  FLAGS="$FLAGS --enable-decoder=h264 --enable-decoder=adpcm_ima_oki --enable-decoder=adpcm_ima_ws"
  
  FLAGS="$FLAGS --enable-encoder=adpcm_ima_qt --enable-encoder=adpcm_ima_wav --enable-encoder=adpcm_g726"
  
  FLAGS="$FLAGS --enable-encoder=adpcm_g722 --enable-libspeex"
  
  
  
  case "$version" in
  
      neon)
  
          EXTRA_CFLAGS="-march=armv7-a -mfloat-abi=softfp -mfpu=neon"
  
          EXTRA_LDFLAGS="-Wl,--fix-cortex-a8"
  
          # Runtime choosing neon vs non-neon requires
  
          # renamed files
  
          ABI="armeabi-v7a"
  
          ;;
  
      armv7a)
  
          EXTRA_CFLAGS="-march=armv7-a -mfloat-abi=softfp"
  
          EXTRA_LDFLAGS=""
  
          ABI="armeabi-v7a"
  
          ;;
  
      *)
  
          EXTRA_CFLAGS=""
  
          EXTRA_LDFLAGS=""
  
          ABI="armeabi"
  
          ;;
  
  esac
  
  DEST="$DEST/$ABI"
  
  FLAGS="$FLAGS --prefix=$DEST"
  
  EXTRA_CFLAGS="$EXTRA_CFLAGS -I/usr/local/include/"
  
  EXTRA_LDFLAGS="$EXTRA_LDFLAGS -L/usr/local/lib"
  
  PKT_CONFIG_PATH="/usr/lib/pkgconfig/"
  
  mkdir -p $DEST
  
  echo $FLAGS --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="$EXTRA_LDFLAGS" > $DEST/info.txt
  
  ./configure $FLAGS --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="$EXTRA_LDFLAGS" | tee $DEST/configuration.txt
  
  [ $PIPESTATUS == 0 ] || exit 1
  
  rm compat/strtod.o
  
  rm compat/strtod.d
  
  make clean
  
  make -j4 || exit 1
  
  make install || exit 1
  
  
  
  done

  Tail of config.log :

  BEGIN /tmp/ffconf.QcYgKHFW.c
  
      1   #include 
  
      2   #include 
  
      3   float foo(complex float f, complex float g) { return cabs(f * I); }
  
      4   int main(void){ return (int) foo; }
  
  END /tmp/ffconf.QcYgKHFW.c
  
  arm-linux-androideabi-gcc --sysroot=/Users/mgriszbacher/Library/Android/sdk/ndk-bundle/platforms/android-16/arch-arm -isysroot /Users/mgriszbacher/Library/Android/sdk/ndk-bundle/platforms/android-16/arch-arm -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Dstrtod=avpriv_strtod -DPIC -I/usr/local/include/ -march=armv5te -std=c99 -fomit-frame-pointer -fPIC -marm -pthread -c -o /tmp/ffconf.vfjjuG7b.o /tmp/ffconf.QcYgKHFW.c
  
  /tmp/ffconf.QcYgKHFW.c:1:21: fatal error: complex.h: No such file or directory
  
   #include 
  
                   ^
  
  compilation terminated.
  
  check_complexfunc cexp 1
  
  check_ld cc
  
  check_cc
  
  BEGIN /tmp/ffconf.QcYgKHFW.c
  
      1   #include 
  
      2   #include 
  
      3   float foo(complex float f, complex float g) { return cexp(f * I); }
  
      4   int main(void){ return (int) foo; }
  
  END /tmp/ffconf.QcYgKHFW.c
  
  arm-linux-androideabi-gcc --sysroot=/Users/mgriszbacher/Library/Android/sdk/ndk-bundle/platforms/android-16/arch-arm -isysroot /Users/mgriszbacher/Library/Android/sdk/ndk-bundle/platforms/android-16/arch-arm -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Dstrtod=avpriv_strtod -DPIC -I/usr/local/include/ -march=armv5te -std=c99 -fomit-frame-pointer -fPIC -marm -pthread -c -o /tmp/ffconf.vfjjuG7b.o /tmp/ffconf.QcYgKHFW.c
  
  /tmp/ffconf.QcYgKHFW.c:1:21: fatal error: complex.h: No such file or directory
  
   #include 
  
                   ^
  
  compilation terminated.
  
  check_pkg_config speex speex/speex.h speex_decoder_init -lspeex
  
  false --exists --print-errors speex
  
  ERROR: speex not found using pkg-config