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• Problems in building ffmpeg 2.3.3 for android using android NDK

  2 septembre 2014, 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.

• In Android, how can I display mp4 files captured by Android itself without having "sorry this video cannot be played" trouble ?

  31 octobre 2013, par fercis

  I am new in Android and have an application as follows :

  1) I record videos by my phone (Samsung Galaxy Note 2).
  2) I send video files (mp4) to a cloud (Dropbox in my example) without any change in encoding. And store the URL of the sent video on the cloud.

  And when the application is in view video mode,
  3) I want to view the videos with the URL (which may be captured by other client Applications) in videoview.

  I cannot view the videos that are captured by the phone itself. There are many discussions in SO about the encoding compatibility (H 263, H 264 etc.).

  Video recoding with ffmpeg

  However, I could not manage to find a way to CHANGE the encoding of the video to be recorded by the application. Camera.Parameters class has the encoding information only for pictures. The quality is not important, I only want to capture videos which can be directly played in the same Android application without any change.

• What is the difference between FFmpeg Android and FFmpeg Android Java ?

  28 avril 2015, par Juliano Nunes Silva Oliveira

  I’m trying to use FFmpeg in a new app and found these two repositories on GitHub : http://hiteshsondhi88.github.io/ffmpeg-android/ and http://hiteshsondhi88.github.io/ffmpeg-android-java/.

  What are their differences ? I mean, Android NDK is just a way to put native code together with your Java code, right ? If so, using FFmpeg-android as a shared native library and using FFmpeg-android-java which seems to be a java library that encapsulates calls to the shared native library, are the same thing. Or am I wrong ?

  Thank you