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• ffmpeg library take long encoding time

  11 février 2019, par robinson george

  I am making an android app in which user can insert a images and its turned into a video. I tried making a video over the photos(selected by user) with replacing green colour in video using ffmpeg library. But the results are not very satisfying and it’s take around 4-5 seconds to encode a video of around 15 seconds. There are already many apps present in play store but i was wondering how they achieved this effect in so much lesser time(like < 1 sec to encode 15 sec video).
  For reference - https://play.google.com/store/apps/details?id=com.yy.biu
  https://play.google.com/store/apps/details?id=com.newbiz.mvmaster

  You can have a look at the result output file here- http://www.yourfilelink.com/get.php?fid=1881360

• H264 HW accelerated decoding in Android using stagefright library

  21 février 2014, par user3215358

  I`m trying to decode h264 video using HW with Stagefright library.

  i have used an example in here. Im getting decoded data in MedaBuffer. For rendering MediaBuffer->data() i tried AwesomeLocalRenderer in AwesomePlayer.cpp.

  but picture in screen are distorted

  Here is The Link of original and crashed picture.

  And also tried this in example`

  sp<metadata> metaData = mVideoBuffer->meta_data();
  
  int64_t timeUs = 0;
  
  metaData->findInt64(kKeyTime, &amp;timeUs);
  
  native_window_set_buffers_timestamp(mNativeWindow.get(), timeUs * 1000);
  
  err = mNativeWindow->queueBuffer(mNativeWindow.get(), 
  
  mVideoBuffer->graphicBuffer().get(), -1);`
  
  </metadata>

  But my native code crashes. I can`t get real picture its or corrupted or it black screen.

  Please, I need Your help, What i'm doing wrong ?

  Thanks in Advance.

• android_build.sh gives error while building ffmpeg library

  25 février 2016, par user3269550

  i am trying to build ffmpeg library my android_build.sh is given below

    #!/bin/bash
  
     NDK=C:/Users/Benzatine/Downloads/android-ndk-r10e
  
     SYSROOT=$NDK/platforms/android-18/arch-arm/
  
     TOOLCHAIN=$NDK/toolchains//arm-linux-androideabi-4.8/prebuilt/windows-x86_64
  
     function build_one
  
     {
  
       ./configure \
  
       --arch=arm \
  
        --target-os=linux \
  
  --enable-runtime-cpudetect \
  
  --enable-pic \
  
  --disable-shared \
  
  --enable-static \
  
  --extra-cflags='-march=armv6' \
  
  --extra-ldflags="$ADDI_LDFLAGS" \
  
  --enable-ffmpeg \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --disable-ffserver\
  
  --disable-network \
  
  --enable-cross-compile \
  
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  --sysroot=$SYSROOT \
  
  $ADDITIONAL_CONFIGURE_FLAG
  
  make clean
  
  make -j4
  
   make install
  
   }
  
  CPU=arm
  
  PREFIX=$(pwd)/android/$CPU 
  
   ADDI_CFLAGS="-marm"
  
   build_one

  but when i try to execute it always gives error

  error is

      /android_build.sh: line 5: syntax error near unexpected token `$'\r''
  
      /android_build.sh: line 5: `function build_one()

  I am new in this so please any one can help me to resolve this issue