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• java bufferedimage array data immediately changes

  26 mars 2016, par ken

      import javax.imageio.ImageIO;
  
  
  
      import org.bytedeco.javacv.FFmpegFrameGrabber;
  
  
  
      public class FrameData 
  
      {   
  
  int count = 0;
  
  int picWidth;
  
  int picHeight;
  
  
  
  BufferedImage img = null;
  
  
  
  //GET FRAME COUNT
  
  public int gf_count(int numofFrames, BufferedImage[] frameArray, String fileLocationsent, String videoNamesent) throws IOException
  
  {        
  
      String fileLocation = fileLocationsent;
  
      String videoName = videoNamesent;
  
  
  
      int frameNums = numofFrames;
  
      int totFrames = 0;
  
  
  
              FFmpegFrameGrabber grab = new FFmpegFrameGrabber(fileLocation + videoName);
  
  
  
          try {   grab.start(); } 
  
          catch (Exception e) {   System.out.println("Unable to grab frames");  }
  
  
  
                      for(int i = 0 ; i < frameNums  ; i++) 
  
          {
  
              try 
  
              {                   
  
                  frameArray[i]= grab.grab().getBufferedImage();
  
                  totFrames = i;  
  
                  File outputfile = new File(fileLocation + "GrayScaledImage" + i + ".jpg");
  
                  ImageIO.write(frameArray[i], "jpg", outputfile);
  
              } 
  
              catch (Exception e) {   /*e.printStackTrace();*/    }
  
          }//END for
  
  
  
                  return totFrames;
  
  
  
      }//END METHOD long getFrameCount()

  Hope someone can explain this to me...
  I am just learning java so here goes...
  I wrote this code to count the number of frames in a .mov file and to test my buffered image array I generated files of the images. As the code is, it works as planned... The problem is immediately after the capturing, if I send the bufferedimages out as files, they all seem to be just the first image. see example below...

      for(int i = 0 ; i < frameNums  ; i++) 
  
          {
  
              try 
  
              {                   
  
                  frameArray[i]= grab.grab().getBufferedImage();
  
                  totFrames = i;  
  
                  File outputfile = new File(fileLocation + "GrayScaledImage" + i + ".jpg");
  
                  ImageIO.write(frameArray[i], "jpg", outputfile);
  
              } 
  
              catch (Exception e) {   /*e.printStackTrace();*/    }
  
          }//END for

  And now if I change that to...

      for(int i = 0 ; i < frameNums  ; i++) 
  
          {
  
              try 
  
              {                   
  
                  frameArray[i]= grab.grab().getBufferedImage();
  
                  totFrames = i;  catch (Exception e) {   /*e.printStackTrace();*/    }}
  
      for(int j = 0; j < frameNums; j++)
  
      {
  
      File outputfile = new File(fileLocation + "GrayScaledImage" + j + ".jpg");
  
                  ImageIO.write(frameArray[j], "jpg", outputfile);
  
      }

  I don’t understand why I am getting the same image repeatedly.
  If further information Is required, just lemme know, this is my first programming question online... Usually find what I am looking for that others have asked. Couldn’t find this one.
  Thanks for your time
  Ken

• Compiling FFmpeg : libx264 not found

  17 mars 2016, par SaidTagnit

  I hope some one helps me the solve this problems. I was trying to compile FFmpeg 2.2.3 library under ubuntu 12.04LTS for android using android ndk r10e by following this tutorials :

  Tutorial1

  Tutorial2

  here is my build_android.sh file :

  #!/bin/bash
  
  NDK=/home/rango/Desktop/android-ndk-r10e
  
  SYSROOT=$NDK/platforms/android-19/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86
  
  
  
  #ADDI_LDFLAGS="-L /usr/local/lib"
  
  #ADDI_CFLAGS="-I /usr/include"
  
  
  
  function build_one
  
  {
  
  ./configure \
  
  --prefix=$PREFIX \
  
  --enable-shared \
  
  --enable-static \
  
  --disable-doc \
  
  --disable-ffmpeg \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --disable-ffserver \
  
  --disable-doc \
  
  --disable-symver \
  
  --enable-protocol=concat \
  
  --enable-protocol=file \
  
  --enable-muxer=mp4 \
  
  --enable-demuxer=mpegts \
  
  --enable-memalign-hack \
  
  --enable-gpl \
  
  --enable-libx264 \
  
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  --target-os=linux \
  
  --arch=arm \
  
  --enable-cross-compile \
  
  --sysroot=$SYSROOT \
  
  --extra-cflags="-Os -fpic -marm $ADDI_CFLAGS" \
  
  --extra-ldflags="$ADDI_LDFLAGS" \
  
  
  
  make clean
  
  make -j4
  
  make install
  
  }
  
  
  
  CPU=arm
  
  PREFIX=$(pwd)/android/$CPU
  
  
  
  build_one

  when i execute buid_android.sh script without —enable-libx264 \ line everything is going well and i can get .a files on android/arm/ folder. but with this line it fails and show the following error in the console :

  ERROR : libx264 not found

  If you think configure made a mistake, make sure you are using the
  latest version from Git. If the latest version fails, report the
  problem to the ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on
  irc.freenode.net. Include the log file "config.log" produced by
  configure as this will help

  it seems like it can’t find where the libraries are, as i get a lot of the following errors in config.log file :

  "LIBNAME".h : No such file or directory
  newlib.h : No such file or
  directory mingw.h : No such file or directory
  x264.h : No such file or
  directory

  Here is the tail of config.log file :

  check_mathfunc truncf 1
  
  check_ld cc
  
  check_cc
  
  BEGIN /tmp/ffconf.zGKqGin6.c
  
      1   #include 
  
      2   float foo(float f, float g) { return truncf(f); }
  
      3   int main(void){ return (int) foo; }
  
  END /tmp/ffconf.zGKqGin6.c
  
  /home/rango/Desktop/android-ndk-r10e/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc --sysroot=/home/rango/Desktop/android-ndk-r10e/platforms/android-19/arch-arm/ -isysroot /home/rango/Desktop/android-ndk-r10e/platforms/android-19/arch-arm/ -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Dstrtod=avpriv_strtod -DPIC -Os -fpic -marm -march=armv5te -std=c99 -fomit-frame-pointer -fPIC -marm -pthread -c -o /tmp/ffconf.8Q9ke3aO.o /tmp/ffconf.zGKqGin6.c
  
  /home/rango/Desktop/android-ndk-r10e/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc --sysroot=/home/rango/Desktop/android-ndk-r10e/platforms/android-19/arch-arm/ -isysroot /home/rango/Desktop/android-ndk-r10e/platforms/android-19/arch-arm/ -Wl,--as-needed -o /tmp/ffconf.3sjTkc5z /tmp/ffconf.8Q9ke3aO.o -lm -lz -pthread
  
  check_lib x264.h x264_encoder_encode -lx264
  
  check_header x264.h
  
  check_cpp
  
  BEGIN /tmp/ffconf.zGKqGin6.c
  
      1   #include 
  
      2   int x;
  
  END /tmp/ffconf.zGKqGin6.c
  
  /home/rango/Desktop/android-ndk-r10e/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc --sysroot=/home/rango/Desktop/android-ndk-r10e/platforms/android-19/arch-arm/ -isysroot /home/rango/Desktop/android-ndk-r10e/platforms/android-19/arch-arm/ -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Dstrtod=avpriv_strtod -DPIC -Os -fpic -marm -march=armv5te -std=c99 -fomit-frame-pointer -fPIC -marm -pthread -E -o /tmp/ffconf.8Q9ke3aO.o /tmp/ffconf.zGKqGin6.c
  
  /tmp/ffconf.zGKqGin6.c:1:18: fatal error: x264.h: No such file or directory
  
   #include 
  
                    ^
  
  compilation terminated.
  
  ERROR: libx264 not found

• How can I run command line FFMPEG and accept multiple pipes (video and audio) without blocking on the first input ?

  18 février 2016, par Version135b

  I’m trying to mux h264 and aac created with MediaCodec using FFMPEG, and also use FFMPEG’s RTMP support to send to youtube. I’ve created two pipes, and am writing from java (android) through WriteableByteChannels. I can send to one pipe just fine (accepting null audio) like this :

  ./ffmpeg -f lavfi -i aevalsrc=0 -i "files/camera-test.h264" -acodec aac -vcodec copy -bufsize 512k -f flv "rtmp://a.rtmp.youtube.com/live2/XXXX"

  YouTube streaming works perfectly (but I have no audio). Using two pipes this is my command :

  ./ffmpeg \
  
  -i "files/camera-test.h264" \
  
  -i "files/audio-test.aac" \
  
  -vcodec copy \
  
  -acodec copy \
  
  -map 0:v:0 -map 1:a:0 \
  
  -f flv "rtmp://a.rtmp.youtube.com/live2/XXXX""

  The pipes are created with mkfifo , and opened from java like this :

  pipeWriterVideo = Channels.newChannel(new FileOutputStream(outputFileVideo.toString()));

  The order of execution (for now in my test phase) is creation of the files, starting ffmpeg (through adb shell) and then starting recording which opens the channels. ffmpeg will immediately open the h264 stream and then wait, since it is reading from the pipe the first channel open (for video) will successfully run. When it comes to trying to open the audio the same way, it fails because ffmpeg has not actually started reading from the pipe. I can open a second terminal window and cat the audio file and my app spits out what i hope is encoded aac, but ffmpeg fails, usually just sitting there waiting. Here is the verbose output :

  ffmpeg version N-78385-g855d9d2 Copyright (c) 2000-2016 the FFmpeg
  
  developers
  
    built with gcc 4.8 (GCC)
  
    configuration: --prefix=/home/dev/svn/android-ffmpeg-with-rtmp/src/ffmpeg/android/arm 
  
      --enable-shared --disable-static --disable-doc --disable-ffplay 
  
      --disable-ffprobe --disable-ffserver --disable-symver 
  
      --cross-prefix=/home/dev/dev/android-ndk-r10e/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi- 
  
      --target-os=linux --arch=arm --enable-cross-compile 
  
      --enable-librtmp --enable-pic --enable-decoder=h264 
  
      --sysroot=/home/dev/dev/android-ndk-r10e/platforms/android-19/arch-arm 
  
      --extra-cflags='-Os -fpic -marm' 
  
      --extra-ldflags='-L/home/dev/svn/android-ffmpeg-with-rtmp/src/openssl-android/libs/armeabi ' 
  
      --extra-ldexeflags=-pie --pkg-config=/usr/bin/pkg-config
  
    libavutil      55. 17.100 / 55. 17.100
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
   matched as AVOption 'debug' with argument 'verbose'.
  
  Trailing options were found on the commandline.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option async (audio sync method) with argument 1.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input file files/camera-test.h264.
  
  Successfully parsed a group of options.
  
  Opening an input file: files/camera-test.h264.
  
  [file @ 0xb503b100] Setting default whitelist 'file'

  I think if I could just get ffmpeg to start listening to both pipes, the rest would work out !

  Thanks for your time.

  EDIT :
  I’ve made progress by decoupling the audio pipe connection and encoding, but now as soon as the video stream has been passed it errors on audio. I started a separate thread to create the WriteableByteChannel for audio and it never gets passed the FileOutputStream creation.

  matched as AVOption 'debug' with argument 'verbose'.
  
  Trailing options were found on the commandline.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input file files/camera-test.h264.
  
  Successfully parsed a group of options.
  
  Opening an input file: files/camera-test.h264.
  
  [file @ 0xb503b100] Setting default whitelist 'file'
  
  [h264 @ 0xb503c400] Format h264 probed with size=2048 and score=51
  
  [h264 @ 0xb503c400] Before avformat_find_stream_info() pos: 0 bytes read:15719 seeks:0
  
  [h264 @ 0xb5027400] Current profile doesn't provide more RBSP data in PPS, skipping
  
  [h264 @ 0xb503c400] max_analyze_duration 5000000 reached at 5000000 microseconds st:0
  
  [h264 @ 0xb503c400] After avformat_find_stream_info() pos: 545242 bytes read:546928 seeks:0 frames:127
  
  Input #0, h264, from 'files/camera-test.h264':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0, 127, 1/1200000: Video: h264 (Baseline), 1 reference frame, yuv420p(left), 854x480 (864x480), 1/50, 25 fps, 25 tbr, 1200k tbn, 50 tbc
  
  Successfully opened the file.
  
  Parsing a group of options: input file files/audio-test.aac.
  
  Applying option vcodec (force video codec ('copy' to copy stream)) with argument copy.
  
  Successfully parsed a group of options.
  
  Opening an input file: files/audio-test.aac.
  
  Unknown decoder 'copy'
  
  [AVIOContext @ 0xb5054020] Statistics: 546928 bytes read, 0 seeks

  Here is where I attempt to open the audio pipe.

  new Thread(){
  
       public void run(){
  
            Log.d("Audio", "pre thread");
  
            FileOutputStream fs = null;
  
            try {
  
                 fs = new FileOutputStream("/data/data/android.com.android.grafika/files/audio-test.aac");
  
            } catch (FileNotFoundException e) {
  
                 e.printStackTrace();
  
            }
  
            Log.d("Audio", "made fileoutputstream");  //never hits here
  
            mVideoEncoder.pipeWriterAudio = Channels.newChannel(fs);
  
            Log.d("Audio", "made it past opening audio pipe");
  
       }
  
  }.start();

  Thanks.