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• Install FFMPEG on android project

  4 octobre 2018, par user3884677

  I try to install FFMPEG on Android project. I follow this tutorial : https://medium.com/@karthikcodes1999/cross-compiling-ffmpeg-4-0-for-android-b988326f16f2

  When I execute the ffmpeg_android.sh file. with this code :

  #!/bin/bash
  
  NDK=$HOME/Library/Android/sdk/ndk-bundle
  
  SYSROOT=$NDK/platforms/android-19/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64
  
  function build_one
  
  {
  
  ./configure \
  
  --prefix=$PREFIX \
  
  --enable-shared \
  
  --disable-static \
  
  --disable-doc \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --disable-doc \
  
  --disable-symver \
  
  --enable-protocol=concat \
  
  --enable-protocol=file \
  
  --enable-muxer=mp4 \
  
  --enable-demuxer=mpegts \
  
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  --target-os=linux \
  
  --arch=arm \
  
  --enable-cross-compile \
  
  --sysroot=$SYSROOT \
  
  --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
  
  --extra-ldflags="$ADDI_LDFLAGS" \
  
  $ADDITIONAL_CONFIGURE_FLAG
  
  make clean all
  
  make -j3
  
  make install
  
  }
  
  CPU=arm
  
  PREFIX=$(pwd)/android/$CPU
  
  ADDI_CFLAGS="-marm"
  
  build_one

  I have this error :

  /Users/christophe/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc
  is unable to create an executable file. C compiler test failed.

  If you think configure made a mistake, make sure you are using the
  latest version from Git. If the latest version fails, report the
  problem to the ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on
  irc.freenode.net. Include the log file "ffbuild/config.log" produced
  by configure as this will help solve the problem. Makefile:2 :
  ffbuild/config.mak : No such file or directory Makefile:40 :
  /tools/Makefile : No such file or directory Makefile:41 :
  /ffbuild/common.mak : No such file or directory Makefile:90 :
  /libavutil/Makefile : No such file or directory Makefile:90 :
  /ffbuild/library.mak : No such file or directory Makefile:92 :
  /fftools/Makefile : No such file or directory Makefile:93 :
  /doc/Makefile : No such file or directory Makefile:94 :
  /doc/examples/Makefile : No such file or directory Makefile:159 :
  /tests/Makefile : No such file or directory make : *** No rule to make
  target `/tests/Makefile’. Stop. Makefile:2 : ffbuild/config.mak : No
  such file or directory ...

• Multiple backslashes are not shown in Video

  26 février 2019, par Sebastian

  I want wo insert the text \ \ \ \ \ \ ' in a video. I escaped it to this

  -loglevel debug -y -i "in.mp4" -vf "[in] drawtext=fontfile=C\\\:\\\\Windows\\\\Fonts\\\\ariblk.ttf: text=\\\\ \\\\ \\\\ \\\\ \\\\ \\\\ \\\': fontsize=32 [out]" "out.mp4"

  The paths are read correctly, but no backslash is shown in the video. If I double the backslashes to \\ \\ \\ \\ \\ \\ ' I get the result I want with \ \ \ \ \ \ '

  -loglevel debug -y -i "in.mp4" -vf "[in] drawtext=fontfile=C\\\:\\\\Windows\\\\Fonts\\\\ariblk.ttf: text=\\\\\\\\ \\\\\\\\ \\\\\\\\ \\\\\\\\ \\\\\\\\ \\\\\\\\ \\\': fontsize=16 [out]" "out.mp4"

  The example from ffmpeg works.

  Which escape rule do I neglect ?

  Edit :
  Escaping the text to

  text='\\\\ \\\\ \\\\ \\\\ \\\\ \\\\ \\\'': fontsize=32 [out]

  or

  text=\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\ \\\\\': fontsize=32 [out]

  leads to an output of

  \ \ \ \ \ \: fontsize=32 [out]

• Bulk identifying images with FFMPEG that contain a graphic

  26 septembre 2019, par edwardv

  I need to be able to bulk sort through images that contain a graphic and remove these images from the folder. The graphic is a ruler-like image for scale.

  I’m a novice with FFMPEG, but have already written a batch script that resizes images. The logic seems pretty understandable, however my issue is that I don’t know what and where to research for a solution to my problem. From what I read, imagemagik might also be a great tool, but I feel more comfortable with FFMPEG.

  I expect the script to look through all image files in a folder and find those the contain the ruler graphic and remove the said images with the rule graphic from the folder. The images are product shots on white backgrounds and the rule graphic is not overlaying anything or acting like a watermark.

  Ideally, if possible, a way to crop out the graphics would be an amazing next step.