Recherche avancée

Sur d’autres sites (5702)

• osx build ffmpeg for android

  23 novembre 2018, par Allen

  I want to build ffmpeg source code for android platform.

  And i had followed some tutorials, but build failed.

  here are my configs

  1. build_android.sh file

     #!/bin/bash
     
     NDK=/Users/***/Library/Android/ndk/android-ndk-r14b
     
     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-ffmpeg 
     
         --disable-ffplay 
     
         --disable-ffprobe 
     
         --disable-ffserver 
     
         --disable-avdevice 
     
         --disable-doc
     
         --disable-symver 
     
         --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
     
         make
     
         make install
     
     }
     
     CPU=arm
     
     PREFIX=$(pwd)/androidtest/$CPU
     
     ADDI_CFLAGS="-marm"
     
     build_one

  2. configure file

     I have also changed configure file

  change

  SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
  
  LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
  
  SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
  
  SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'

  to

  SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'  
  
  LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'  
  
  SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'  
  
  SLIB_INSTALL_LINKS='$(SLIBNAME)'

  3. console output

  ...
  
  INSTALL   doc/examples/demuxing_decoding.c
  
  INSTALL   doc/examples/encode_audio.c
  
  INSTALL   doc/examples/encode_video.c
  
  INSTALL   doc/examples/extract_mvs.c
  
  INSTALL   doc/examples/filter_audio.c
  
  INSTALL   doc/examples/filtering_audio.c
  
  INSTALL   doc/examples/filtering_video.c
  
  INSTALL   doc/examples/http_multiclient.c
  
  INSTALL   doc/examples/hw_decode.c
  
  INSTALL   doc/examples/metadata.c
  
  INSTALL   doc/examples/muxing.c
  
  INSTALL   doc/examples/qsvdec.c
  
  INSTALL   doc/examples/remuxing.c
  
  INSTALL   doc/examples/resampling_audio.c
  
  INSTALL   doc/examples/scaling_video.c
  
  INSTALL   doc/examples/transcode_aac.c
  
  INSTALL   doc/examples/transcoding.c
  
  INSTALL   doc/examples/vaapi_encode.c
  
  INSTALL   doc/examples/vaapi_transcode.c
  
  INSTALL   doc/examples/README
  
  INSTALL   doc/examples/Makefile
  
  INSTALL   libavdevice/libavdevice.a
  
  /bin/sh: ranlib/usr/local/lib/libavdevice.a: No such file or directory
  
  make: *** [install-libavdevice-static] Error 127

  4. problem

  according to the console output, libavdevice.a not found.

  

  but I can find it in the finder

  how to fix /bin/sh: ranlib/usr/local/lib/libavdevice.a: No such file or directory error ?

  i have searched some resolvers for make: *** [install-libavdevice-static] Error 127 but not work for me.

• Error on building ffmpeg for android using NDK in ubuntu

  17 février 2015, par Alin

  ---

  An ffmpeg android for android 2.3+ which allows me to decompress/add watermark/recompress a video file. I need to have it working on all current CPUs.

  What I did so far

  I looked in a lot of sources for guidance. Most of the articles are obsolete or simply not work. Not to mention the whole struggle I went to from installing ubuntu on virtualBox, an OS which I never seen before. The whole java/sdk/ndk install was pretty easy but I had hard times in setting the PATH variables and most importantly WHERE to set them.

  So, here is my structure :
  The default folder path is /home/alin in which I have
  

  The PATH is set in etc/profile and I can confirm that it works. I know that it works because running java -version or ndk-build run just fine

  > ANDROID_SDK=/home/alin/android/sdk ANDROID_NDK=/home/alin/android/ndk
  
  > JAVA_HOME=/usr/local/java/jdk1.8.0_20
  
  > PATH=$PATH:$HOME/bin:$JAVA_HOME/bin:$ANDROID_SDK/platform-tools:$ANDROID_SDK/tools:$ANDROID_NDK
  
  > export JAVA_HOME export ANDROID_SDK export ANDROID_NDK export PATH

  I have downloaded the latest sources from ffmpeg.org and saved it in ndk/sources folder, in sources I have created an android_build.sh file as from (http://www.roman10.net/how-to-build-ffmpeg-with-ndk-r9/)

  

  #!/bin/bash
  
  
  
  NDK=/home/alin/android/ndk
  
  SYSROOT=$NDK/platforms/android-9/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
  
  
  
  function build_one
  
  
  
  {
  
  
  
  ./configure \
  
      --prefix=$PREFIX \
  
      --enable-shared \
  
      --disable-static \
  
      --disable-doc \
  
      --disable-ffmpeg \
  
      --disable-ffplay \
  
      --disable-ffprobe \
  
      --disable-ffserver \
  
      --disable-avdevice \
  
      --disable-doc \
  
      --disable-symver \
  
      --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
  
  make
  
  make install
  
  }
  
  
  
  CPU=arm
  
  
  
  PREFIX=$(pwd)/android/$CPU 
  
  
  
  ADDI_CFLAGS="-marm"
  
  
  
  build_one

  When running the .sh file I get this :
  

  Trying different build.sh sometimes I got different errors... so I have no idea what to do next.

  Please guide me to :

  • be able to build ffmpeg
  • make it compatible with as many devices as possible.

  Thank you.

• What's the easiest way to concat videos together with diverse transitions from the commandline ? [on hold]

  1er décembre 2017, par fisch2

  I have N mp4s, say 5s each, and I’d like to either write a small program or use existing commandline-accessible programs to concatenate them all together. Each pair of videos should use a distinct 500ms transition that blends between them as one "fades out" and the next video "fades in" in a similar spirit to the set of transitions provided by https://gl-transitions.com.

  A simple cross-fade seems doable using ffmpeg directly (albeit absurdly complicated), but any other transitions and/or doing this for multiple concat’ed videos seems to not be what ffmpeg was made for.

  In the course of due diligence, I’ve found the MLT Framework which may be useful and moviepy, though I’m not sure how to tailor either of these utilities to my needs.

  Any ideas or direction would be greatly appreciated.

  Thanks !