• Compression Techniques

  FFMPEG segmentation fault in libavcodec and invalid size of /lib/libavcodec.so.52.108.0

  Posted by Dmitry Iasd on March 12, 2011 at 10:15 am

  Hi!

  I’m trying to compile ffmpeg from source code on Debian Linux. I have a clean version of Debian Lenny (5.08) (installed from scratch) and a VMWare snapshot with Debian Lenny (5.08) snapshot.

  I use the same instructions (provided below) to compile FFMPEG on both Debian instances. Here are these instructions:
  
wget https://www.debian-multimedia.org/pool/main/d/debian-multimedia-keyring/debian-multimedia-keyring_2010.12.26_all.deb
dpkg -i debian-multimedia-keyring_2010.12.26_all.deb

  apt-get install checkinstall yasm git-core subversion

  apt-get build-dep ffmpeg

  apt-get remove libx264-dev
  wget ftp://ftp.videolan.org/pub/videolan/x264/snapshots/x264-snapshot-20100926-2245.tar.bz2
  tar xjvf x264-snapshot-20100926-2245.tar.bz2
  cd x264-snapshot-20100926-2245
  ./configure --enable-pic --prefix=/usr
  make
  checkinstall --pkgname=x264 --pkgversion "snapshot-20100926" --backup=no --default
  cd ..

  apt-get remove libfaac-dev
  apt-get remove libfaac0
  wget https://downloads.sourceforge.net/faac/faac-1.28.tar.bz2
  tar xjvf faac-1.28.tar.bz2
  cd faac-1.28
  ./configure --prefix=/usr
  make
  checkinstall --pkgname=faac -pkgversion "1.28.svn`date +%Y%m%d`" --backup=no --default
  cd ..

  apt-get remove libtheora-dev
  apt-get remove libtheora0
  wget https://downloads.xiph.org/releases/theora/libtheora-1.1.1.tar.gz
  tar xzvf libtheora-1.1.1.tar.gz
  cd libtheora-1.1.1
  ./configure --prefix=/usr
  make
  checkinstall --pkgname=libtheora --pkgversion "1.1.1" --backup=no --default
  cd ..

  apt-get remove libvorbis-dev
  apt-get remove libvorbis0a # The system will offer to delete some other packages, agree
  wget https://downloads.xiph.org/releases/vorbis/libvorbis-1.3.1.tar.gz
  tar zxvf libvorbis-1.3.1.tar.gz
  cd libvorbis-1.3.1
  ./configure --prefix=/usr
  make
  checkinstall --pkgname=libvorbis --pkgversion "1.3.1" --backup=no --default
  cd ..

  apt-get remove libmp3lame-dev
  apt-get remove libmp3lame0
  wget https://downloads.sourceforge.net/project/lame/lame/3.98.4/lame-3.98.4.tar.gz
  tar xzvf lame-3.98.4.tar.gz
  cd lame-3.98.4
  ./configure --enable-nasm --enable-shared --prefix=/usr
  make
  checkinstall --pkgname=lame-ffmpeg --pkgversion="3.98.4" --backup=no --default --deldoc=yes
  cd ..

  git clone git://review.webmproject.org/libvpx.git
  cd libvpx
  ./configure --enable-pic --enable-vp8 --enable-postproc --enable-runtime-cpu-detect --prefix=/usr
  make
  checkinstall --pkgname=libvpx --pkgversion="`date +%Y%m%d%H%M`-git" --backup=no --default --deldoc=yes
  cd ..

  apt-get install libopenjpeg-dev

  svn checkout svn://svn.ffmpeg.org/soc/libavfilter -r5946 # THIS IS FFMPEG -r26400
  cd libavfilter
  ./checkout.sh # Checks out the most current version of FFMPEG that works with libavfilter.
  cd ffmpeg
  ./configure --prefix=/usr --libdir=/lib --shlibdir=/lib --bindir=/bin --incdir=/include/ffmpeg --enable-shared --enable-gpl --enable-version3 --enable-nonfree --disable-ffplay --disable-ffprobe --disable-ffserver --enable-postproc --enable-pthreads --disable-network --enable-runtime-cpudetect --enable-hardcoded-tables --enable-memalign-hack --disable-devices --enable-libfaac --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libx264 --enable-pic --enable-avfilter --enable-libvpx --enable-libvorbis --enable-libtheora
  make
  checkinstall --pkgname=ffmpeg --pkgversion="`date +%Y%m%d%H%M`" --backup=no --default --deldoc=yes
  cd ./tools
  gcc qt-faststart.c -o /bin/qt-faststart
  cd ../../..

  mkdir segmenter
cd segmenter
wget https://svn.assembla.com/svn/legend/segmenter/segmenter.c
apt-get update
apt-get install libbz2-dev
gcc -Wall -I../libavfilter/ffmpeg -g segmenter.c -o segmenter -lavformat -lavcodec -lavutil -lbz2 -lm -lz -lfaac -lmp3lame -lx264
cp segmenter /usr/bin/segmenter
cd ..


  After compilation of FFMPEG on my clean Debian, I see that the size of the library /lib/libavcodec.so.52.108.0 is less than the size of the library I get when compiling on the VMWare instance Debian. And this results in the following error:
  
[ 2707.022186] ffmpeg[7077] general protection ip:b7043028 sp:bf8d8318 error:0 in libavcodec.so.52.108.0[b6aca000+7f8000]


  when I try to run this command:
  
/bin/ffmpeg -i "/var/tmp/scooter-race.flv" -threads 0 -f webm -s 640x360 -vcodec libvpx -vb 1024k -g 120 -qmax 50 -qmin 10 -acodec libvorbis -ab 128k -ac 2 -ar 44100 -psnr -y /var/tmp/xcodeout/tempOutputFile


  However, when I copy that library /lib/libavcodec.so.52.108.0 from VMWare Debian machine to my clean Debian, ffmpeg works without segmentation faults.

  Can anyone advice, why these libraries can be different when I compile on different machines following the same steps? Can this be caused by some gcc configuration (in its global configuration files if there are any) or smth like this?

  Thanks!

  Dmitry Iasd replied 15 years, 5 months ago 1 Member · 0 Replies
• 0 Replies

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