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• ffmpeg - Encoding Percentage in PHP

  13 juillet 2012, par Jimbo

  I've written a whole system in PHP and bash on the server to convert and stream videos in HTML5 on my VPS. The conversion is done by ffmpeg in the background and the contents is output to block.txt.

  Having looked at the following posts :

  Can ffmpeg show a progress bar ?

  and

  ffmpeg video encoding progress bar

  amongst others, I can't find a working example.

  I have always struggled with the regexes and maths, and I need to grab the currently encoded progress as a percentage.

  The first post I linked above gives :

  $log = @file_get_contents('block.txt');
  
  
  
  preg_match("/Duration:([^,]+)/", $log, $matches);
  
  list($hours,$minutes,$seconds,$mili) = split(":",$matches[1]);
  
  $seconds = (($hours * 3600) + ($minutes * 60) + $seconds);
  
  $seconds = round($seconds);
  
  
  
  $page = join("",file("$txt"));
  
  $kw = explode("time=", $page);
  
  $last = array_pop($kw);
  
  $values = explode(' ', $last);
  
  $curTime = round($values[0]);
  
  $percent_extracted = round((($curTime * 100)/($seconds)));
  
  
  
  echo $percent_extracted;

  The $percent_extracted variable echoes zero, and as maths is not my strong point, I really don't know how to progress here.

  Here's one line from the ffmpeg output from block.txt (if it's helpful)

  time=00:19:25.16 bitrate= 823.0kbits/s frame=27963 fps= 7 q=0.0 size=
  117085kB time=00:19:25.33 bitrate= 823.1kbits/s frame=27967 fps= 7
  q=0.0 size= 117085kB time=00:19:25.49 bitrate= 823.0kbits/s
  frame=27971 fps= 7 q=0.0 size= 117126kB

  Please help me output this percentage, once done I can create my own progress bar. Thanks.

• ffmpeg on iOS 5.1 Undefined Symbols Error

  25 avril 2012, par AndyDunn

  So I've spent several hours now working through the scant amount of information available online about building ffmpeg for iOS. The building process seems to work well and I end up with fat files for armv6 and armv7 which I drag over into my project.

  However, whenever I try to use the "avcodec_init()" command I get the following error :

  Undefined symbols for architecture armv7 :
  "_avcodec_init", referenced from :

   -[FirstViewController viewDidLoad] in FirstViewController.o

  ld : symbol(s) not found for architecture armv7

  clang : error : linker command failed with exit code 1 (use -v to see invocation)

  The library files are included in the 'Link Binary with Libraries' of the project settings, so they are definitely compiled into the app. I just can't for the life of me work out why I'm getting an error on this.

  I've tried several different projects, and downloaded some existing project files from the web and get the same error.

  This is the build script I used :

  export PLATFORM="iPhoneOS" export MIN_VERSION="4.0" export
  MAX_VERSION="5.1" export
  DEVROOT=/Volumes/Lion/Applications/Xcode.app/Contents/Developer/Platforms/$PLATFORM.platform/Developer
  export SDKROOT=$DEVROOT/SDKs/$PLATFORM$MAX_VERSION.sdk export
  CC=$DEVROOT/usr/bin/llvm-gcc export LD=$DEVROOT/usr/bin/ld export
  CPP=$DEVROOT/usr/bin/cpp export CXX=$DEVROOT/usr/bin/llvm-g++ export
  AR=$DEVROOT/usr/bin/ar export LIBTOOL=$DEVROOT/usr/bin/libtool export
  NM=$DEVROOT/usr/bin/nm export CXXCPP=$DEVROOT/usr/bin/cpp export
  RANLIB=$DEVROOT/usr/bin/ranlib

  COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot $SDKROOT
  -marm -fPIC" export LDFLAGS="$COMMONFLAGS -fPIC" export CFLAGS="$COMMONFLAGS -fvisibility=hidden" export
  CXXFLAGS="$COMMONFLAGS -fvisibility=hidden
  -fvisibility-inlines-hidden"

  FFMPEG_LIBS="libavcodec libavdevice libavformat libavutil libswscale"

  echo "Building armv6..."

  make clean ./configure \
  —cpu=arm1176jzf-s \
  —extra-cflags='-arch armv6 -miphoneos-version-min=$MIN_VERSION -mthumb' \
  —extra-ldflags='-arch armv6 -miphoneos-version-min=$MIN_VERSION' \
  —enable-cross-compile \
  —arch=arm \
  —target-os=darwin \
  —cc=$CC \
  —sysroot=$SDKROOT \
  —prefix=installed \
  —disable-network \
  —disable-decoders \
  —disable-muxers \
  —disable-demuxers \
  —disable-devices \
  —disable-parsers \
  —disable-encoders \
  —disable-protocols \
  —disable-filters \
  —disable-bsfs \
  —enable-decoder=h264 \
  —enable-decoder=svq3 \
  —enable-gpl \
  —enable-pic \
  —disable-doc perl -pi -e 's/HAVE_INLINE_ASM 1/HAVE_INLINE_ASM 0/' config.h make -j3

  mkdir -p build.armv6 for i in $FFMPEG_LIBS ; do cp ./$i/$i.a
  ./build.armv6/ ; done

  echo "Building armv7..."

  make clean ./configure \
  —cpu=cortex-a8 \
  —extra-cflags='-arch armv7 -miphoneos-version-min=$MIN_VERSION -mthumb' \
  —extra-ldflags='-arch armv7 -miphoneos-version-min=$MIN_VERSION' \
  —enable-cross-compile \
  —arch=arm \
  —target-os=darwin \
  —cc=$CC \
  —sysroot=$SDKROOT \
  —prefix=installed \
  —disable-network \
  —disable-decoders \
  —disable-muxers \
  —disable-demuxers \
  —disable-devices \
  —disable-parsers \
  —disable-encoders \
  —disable-protocols \
  —disable-filters \
  —disable-bsfs \
  —enable-decoder=h264 \
  —enable-decoder=svq3 \
  —enable-gpl \
  —enable-pic \
  —disable-doc perl -pi -e 's/HAVE_INLINE_ASM 1/HAVE_INLINE_ASM 0/' config.h make -j3

  mkdir -p build.armv7 for i in $FFMPEG_LIBS ; do cp ./$i/$i.a
  ./build.armv7/ ; done

  mkdir -p build.universal for i in $FFMPEG_LIBS ; do lipo -create
  ./build.armv7/$i.a ./build.armv6/$i.a -output ./build.universal/$i.a ;
  done

  for i in $FFMPEG_LIBS ; do cp ./build.universal/$i.a ./$i/$i.a ; done

  make install

• How to integrate DLNA and ffmpeg ?

  27 mars 2015, par vishnu

  While streaming contents from DMS , I need to encode it using FFMpeg for downscaling. Is there any way to do the same. What are the tools i require and also the procedure to do it ?