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• Scale image with ffmpeg in bash script

  17 juin 2014, par Brian Bennett

  I’m playing with jclem’s Gifify bash script as a quick way to make GIFs for documentation. It runs on ffmpeg and ImageMagick and I’m trying to find a way to add a variable to scale the produced GIF so I don’t have to go back and add it again. I thought I added the d (resize) variable correctly, but the script fails and just prints the help contents. It does not show my added variable in that help readout. Any ideas ?

  Update

  I solved the problem with printing help contents rather than running the script, but now I’m receiving an error about the -scale parameter.

  convert: invalid argument for option `-scale': -vf @ error/convert.c/ConvertImageCommand/2513.

  Is this because of my if statement syntax for the scale parameter below ?

  #!/bin/bash
  
  
  
  function printHelpAndExit {
  
    echo 'Usage:'
  
    echo '  gifify -conx filename'
  
    echo ''
  
    echo 'Options: (all optional)'
  
    echo '  c CROP:   The x and y crops, from the top left of the image, i.e. 640:480'
  
    echo '  o OUTPUT: The basename of the file to be output (default "output")'
  
    echo '  n:        Do not upload the resulting image to CloudApp'
  
    echo '  r FPS:    Output at this (frame)rate (default 10)'
  
    echo '  s SPEED:  Output using this speed modifier (default 1)'
  
    echo '            NOTE: GIFs max out at 100fps depending on platform. For consistency,'
  
    echo '            ensure that FPSxSPEED is not > ~60!'
  
    echo '  x:        Remove the original file and resulting .gif once the script is complete'
  
    echo '  d SCALE:  Scales GIF image to specified dimensions (default no scale)'
  
    echo ''
  
    echo 'Example:'
  
    echo '  gifify -c 240:80 -o my-gif -x my-movie.mov'
  
    exit $1
  
  }
  
  
  
  noupload=0
  
  fps=10
  
  speed=1
  
  
  
  OPTERR=0
  
  
  
  while getopts "c:o:r:s:d:nx" opt; do
  
    case $opt in
  
      c) crop=$OPTARG;;
  
      h) printHelpAndExit 0;;
  
      o) output=$OPTARG;;
  
      n) noupload=1;;
  
      r) fps=$OPTARG;;
  
      s) speed=$OPTARG;;
  
      x) cleanup=1;;
  
      d) scale=$OPTARG;;
  
      *) printHelpAndExit 1;;
  
    esac
  
  done
  
  
  
  shift $(( OPTIND - 1 ))
  
  
  
  filename=$1
  
  
  
  if [ -z ${output} ]; then
  
    output=$filename
  
  fi
  
  
  
  if [ -z $filename ]; then printHelpAndExit 1; fi
  
  
  
  if [ $crop ]; then
  
    crop="-vf crop=${crop}:0:0"
  
  else
  
    crop=
  
  fi
  
  
  
  if [ $scale ]; then
  
    scale="-vf scale=${scale}:0:0"
  
  else
  
    scale=
  
  fi
  
  
  
  # -delay uses time per tick (a tick defaults to 1/100 of a second)
  
  # so 60fps == -delay 1.666666 which is rounded to 2 because convert
  
  # apparently stores this as an integer. To animate faster than 60fps,
  
  # you must drop frames, meaning you must specify a lower -r. This is
  
  # due to the GIF format as well as GIF renderers that cap frame delays
  
  # < 3 to 3 or sometimes 10. Source:
  
  # http://humpy77.deviantart.com/journal/Frame-Delay-Times-for-Animated-GIFs-214150546
  
  echo 'Exporting movie...'
  
  delay=$(bc -l <<< "100/$fps/$speed")
  
  temp=$(mktemp /tmp/tempfile.XXXXXXXXX)
  
  
  
  ffmpeg -loglevel panic -i $filename $crop -r $fps -f image2pipe -vcodec ppm - >> $temp
  
  
  
  echo 'Making gif...'
  
  cat $temp | convert +dither -layers Optimize -delay $delay -scale $scale - ${output}.gif
  
  
  
  if [ $noupload -ne 1 ]; then
  
    open -a Cloud ${output}.gif
  
  
  
    echo `pbpaste`
  
  
  
    if [ $cleanup ]; then
  
      rm $filename
  
      rm ${output}.gif
  
    fi
  
  else
  
    echo ${output}.gif
  
  fi

• Integrating ffmpeg in xcode5, Cannot find gcc

  22 juin 2014, par user2007547

  I have been trying to integrate ffmpeg in xcode5.
  The step [here][1]

  [1] : FFMPEG integration on iphone/ ipad project says that cc parameter needs to be gcc in iphoneOs.platform.

  But I could not find it in my xcode5.
  It is present in xcode 4.6.3 that I have.

  I tried the ./configure command with cc as gcc from xcode4.
  Something like this :

  ./configure --prefix=armv7 --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-    ffserver --enable-avresample --enable-cross-compile --   sysroot="/Applications/Xcode5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk" --target-os=darwin --cc="/Applications/Xcode4.6.3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc" --extra-cflags="-arch armv7 -mfpu=neon -miphoneos-version-min=6.0" --extra-ldflags="-arch armv7 -isysroot /Applications/Xcode5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -miphoneos-version-min=6.0" --arch=arm --cpu=cortex-a9 --enable-pic

  It works ok but then the make command after fails like this :

  libavcodec/arm/mdct_vfp.S:113:unknown register alias 'TCOS_D0_HEAD'
  
  libavcodec/arm/mdct_vfp.S:114:unknown register alias 'TCOS_D1_HEAD'
  
  libavcodec/arm/mdct_vfp.S:115:unknown register alias 'TCOS_S0_TAIL'
  
  make: *** [libavcodec/arm/mdct_vfp.o] Error 1

  What am I doing wrong here ?? Where can I find gcc for xcode5 ??

• Error when compiling FDK-AAC for iOS

  1er juillet 2014, par 谢小进

  I want to compile FDK-AAC for iOS, including i386, x86_64, armv7, armv7s, arm64. I use this shell script and run, only i386, x86_64, armv7, armv7s are built. Code like this :

  #!/bin/sh
  
  
  
  # OS X Mavericks, Xcode 5.1
  
  
  
  set -ex
  
  
  
  VERSION="0.1.3"
  
  CURRPATH=`pwd`
  
  SOURCE="fdk-aac-$VERSION"
  
  DSTDIR="libfdk-aac"
  
  SDKVERSION="7.1"
  
  ARCHS="x86_64 i386 armv7 armv7s"
  
  DEVELOPER="/Applications/Xcode.app/Contents/Developer"
  
  
  
  rm -rf $DSTDIR
  
  mkdir $DSTDIR
  
  
  
  tar jxf $SOURCE.tar.gz
  
  cd $SOURCE
  
  
  
  for ARCH in $ARCHS; do
  
      mkdir -p $CURRPATH/$DSTDIR/$ARCH
  
  
  
      if [ $ARCH == "i386" -o $ARCH == "x86_64" ]; then
  
          PLATFORM="iPhoneSimulator"
  
          HOST=
  
          if [ $ARCH = "i386" ]; then
  
              HOST="--host=i386-apple-darwin"
  
          fi
  
      else
  
          PLATFORM="iPhoneOS"
  
          HOST="--host=arm-apple-darwin"
  
      fi
  
  
  
      SDK="$DEVELOPER/Platforms/$PLATFORM.platform/Developer/SDKs/$PLATFORM$SDKVERSION.sdk"
  
      IOSMV="-miphoneos-version-min=7.0"
  
      export CC="$DEVELOPER/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
  
      export CFLAGS="$IOSMV -arch $ARCH"
  
      export LDFLAGS="$IOSMV -arch $ARCH -isysroot $SDK"
  
      export LIBS="-L$SDK/usr/lib"
  
      export CXXFLAGS="$IOSMV -arch $ARCH -I$SDK/usr/include"
  
  
  
      ./configure \
  
      $HOST \
  
      --with-sysroot="$SDK" \
  
      --prefix=$CURRPATH/$DSTDIR/$ARCH
  
  
  
      make && make install && make clean
  
  done
  
  
  
  cd ..
  
  mkdir -p $DSTDIR/lib
  
  
  
  lipo -create `find $DSTDIR -name libfdk-aac.a` -output $DSTDIR/lib/libfdk-aac.a
  
  
  
  cp -rf $DSTDIR/$ARCH/include $DSTDIR
  
  
  
  for ARCH in $ARCHS; do
  
      rm -rf $DSTDIR/$ARCH
  
  done

  Can somebody tell me why arm64 is not built correct ? If needed, where can I change them ? Maybe it could be like -host= value. but I have used -host=arm-apple-darwin, and -host=arm64-apple-darwin, it’s not correct either.