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• Call libffmpeg.so through command line on Android

  1er décembre 2013, par user3032481

  I google for this github page : https://github.com/vecio/FFmpeg-Android
  And now I had built some latest libffmpeg.so for different versions of arms(ARMv7,vfp,neon,armv6).
  But I can't use these in my Android directly.

  Why I tried to call libffmpeg.so directly instead of jni ?

  Because I found a libffmpeg.so from the internet that I can directly use in my project by java.lang.ProcessBuilder and java.lang.Process, and it doesn't need jni at all.
  You can get this .so file through this link : http://goo.gl/n0Y1YU

  I didn't change any configure parameter in the FFmpeg-Android.sh on the github above.
  I think that these libffmpeg.so files I compiled can't deal with command line(they are just libraries.).
  I don't know how to modify it(Maybe modify the configure parameters).
  Does anyone know ?

• Having problems compiling ffmpeg for Android

  25 mars 2013, par Budius

  I'm trying to compile ffmpeg for Android using this guy script (https://github.com/guardianproject/android-ffmpeg) because it looked like the simplest and the whole NDK is really not my area of expertise.

  So let's see what I've done so far :

  • Downloaded and installed a fresh Ubuntu 12.04 LTS from : http://www.ubuntu.com/download/desktop in a VirtualBox. (had some little problems with video but a few updates later in the terminal ubuntu is up and running)
  • installed the Android SDk and downloded/unzipped the NDK into /Documents/ndk
  • I used those commands to install the compiler :

  $ sudo apt-get update

  $ sudo apt-get upgrade

  $ sudo apt-get install build-essential

  $ gcc -v

  $ make -v

  • then sudo install git (or something like that to install git)
  • then git clone https://github.com/guardianproject/android-ffmpeg.git
  • then copied from the guys page building section
  • cd android-ffmpeg
  • git submodule init
  • git submodule update
  • NDK_BASE=/path/to/android-ndk ./configure_make_everything.sh

  it mostly goes well until it says :

  arm-linux-androideabi-gcc is unable to create an executable file C
  compiler test failed

  If you think configure made a mistake,.. blaah blahh blaah

  I'm not sure what it means or where to go from here.
  from this I did some chmod 777 on the folders to make sure stuff can be execute.

  also from this I tried his script but without any luck.

  help ?

• Encoding a video to H.254 in iOS and Android

  14 mai 2018, par Dini88

  I have tried to encode a video to H.264 (basically from H.265) in iOS using the following libraries.

  • OpenH264
  • FFMPeg
  • VideoToolBox
  • NanoStream

  The scenario I tried is as follows. Input a video encoded with H.265 compression and tried to re-encode it with H.264.

  I was unable to find any relevant example or tutorial to achieve this task. The VideoTooBox example was the nearest suitable example I found. (https://www.objc.io/issues/23-video/videotoolbox/)

  Can anyone help me to accomplish my task using a suitable library in iOS and Android ? Or is this achievable from the iOS or Android application ?