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• Making and displaying a video

  4 mars 2018, par Mehdi Shojaeian

  I have to develop an app which shoud crop and cut video .
  I decide to use ffmpeg and I tested below library :
  https://github.com/WritingMinds/ffmpeg-android-java

  but I get [libx264 @ 0xf506d400] using cpu capabilities: none!at console and running so so slowly.

  so I decide to build my own ffmpeg prebuilt and try my hard and test below link for make prebuild ffmpeg :

  • https://github.com/WritingMinds/ffmpeg-android
    
  • https://github.com/WritingMinds/ffmpeg-android-java
    
  • http://writingminds.github.io/ffmpeg-android/
    
  • http://writingminds.github.io/ffmpeg-android-java/
    and so much more

  But enety build has own error, such as "couldn’t find c comiler"
  After too many search I found and build ffmpeg but the result is some .so file (listed below) :
  

  • libavcodec-58.so
  • libavdevice-58.so
  • libavformat-58.so
  • libavutil-56.so
  • libpostproc-55.so
  • libswresample-3.so
  • libswscale-5.so

  my build.sh is :

  NDK=/Users/mehdi/Documents/adt-bundle-mac-x86_64-20140702/ndk/android-ndk-r13b
  
  SYSROOT=$NDK/platforms/android-24/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 \
  
      --enable-avdevice \
  
      --disable-doc \
  
      --disable-symver \
  
      --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
      --target-os=linux \
  
      --cpu=cortex-a8 \
  
      --arch=arm \
  
      --enable-cross-compile \
  
      --sysroot=$SYSROOT \
  
      --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
  
      --extra-ldflags="$ADDI_LDFLAGS" \
  
      --enable-runtime-cpudetect \
  
      --enable-gpl \
  
      --enable-avfilter \
  
      --enable-encoders  \
  
      --enable-muxers \
  
      --enable-protocols  \
  
      --enable-parsers \
  
      --enable-demuxers \
  
      --enable-decoders \
  
      --enable-bsfs \
  
      --enable-network \
  
      --enable-swscale  \
  
      --enable-asm 
  
  
  
      $ADDITIONAL_CONFIGURE_FLAG
  
  make clean
  
  make
  
  make install
  
  }
  
  CPU=arm
  
  PREFIX=$(pwd)/android/$CPU 
  
  ADDI_CFLAGS="-marm"
  
  build_one

  and I put .so files into cpp folder in android studio and make CMakeLists.txt.
  every thing is ok up to now but where can I found ffmpeg file to execute command in java .

• How to record (and process ?) a video that is streamable from Android

  13 mai 2016, par afollestad

  My company’s app relies heavily on video recording and playback of web-based videos. I use the MediaRecorder API to record videos, through this library designed by me : https://github.com/afollestad/material-camera.

  For playback, I use this library which is basically a wrapper around Google’s ExoPlayer library : https://github.com/brianwernick/ExoMedia.

  It works fine for the most part with small videos, especially if I decrease bit rates for audio and video. However, larger and higher quality videos have many issues. Sometimes they seem to buffer forever, sometimes playback doesn’t even start successfully, etc. Again, these videos are being streamed over HTTP from Amazon S3.

  ---

  I’ve read a little bit about FFMPEG, and how it can process MP4’s for "faststart", splitting the files into chunks for DASH, etc. However, FFMPEG solutions for Android seem a bit complex, so...

  Is there anyway to record MP4’s from Android, with MediaRecorder, MediaCodec, or some other API which results in a video file that is fast to stream ? It amazes me how well Snapchat has figured this out.

• Using audio File in FFmpegFrameRecorder instead of AudioRecorder

  15 mars 2016, par Haroon Ahmed

  Iam following https://github.com/sourab-sharma/TouchToRecord tutorial. Iam trying to merger sound from audio File instead of microphone. For that purpose i need to read audio data frame by frame. How can i do that ?
  Thanks