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• Trying to load a video file with ffmpeg using javacv

  11 mars 2012, par Takatakas

  I am trying to load a video file with javacv but I am facing some problems.

  I managed to compile an application that will show an image on screen so I assume that my setup is ok.

  The code I am using is the following.

  import java.io.File;
  
  
  
  import com.googlecode.javacv.CanvasFrame;
  
  import com.googlecode.javacv.FFmpegFrameGrabber;
  
  
  
  public class TestCV{
  
  
  
      public static void main(String[] args) throws Exception {
  
  
  
          File f = new File("input.mp4");
  
          FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(f);
  
  
  
          final CanvasFrame canvas = new CanvasFrame("My Image");
  
  
  
          canvas.showImage(grabber.grab());
  
  
  
      }
  
  }

  Here is the error

  Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Users\takas\AppData\Local\Temp\jniavutil3690549951281752227.dll: Can't find dependent libraries
  
      at java.lang.ClassLoader$NativeLibrary.load(Native Method)
  
      at java.lang.ClassLoader.loadLibrary0(Unknown Source)
  
      at java.lang.ClassLoader.loadLibrary(Unknown Source)
  
      at java.lang.Runtime.load0(Unknown Source)
  
      at java.lang.System.load(Unknown Source)
  
      at com.googlecode.javacpp.Loader.load(Loader.java:337)
  
      at com.googlecode.javacpp.Loader.load(Loader.java:271)
  
      at com.googlecode.javacv.cpp.avutil.<clinit>(avutil.java:76)
  
      at java.lang.Class.forName0(Native Method)
  
      at java.lang.Class.forName(Unknown Source)
  
      at com.googlecode.javacpp.Loader.load(Loader.java:291)
  
      at com.googlecode.javacv.cpp.avcodec.<clinit>(avcodec.java:87)
  
      at com.googlecode.javacv.FFmpegFrameGrabber.<init>(FFmpegFrameGrabber.java:73)
  
      at com.googlecode.javacv.FFmpegFrameGrabber.<init>(FFmpegFrameGrabber.java:69)
  
      at tester.t.JavaFlow.main(JavaFlow.java:13)
  
  </init></init></clinit></clinit>

  Do I have to use separate ffmpeg dlls ? There is one ffmpeg dll in the opecv bin folder.

  If I have to do this I will need a better way to include them using eclipse. Until now I just add the folder to path variable. For example I added this to make opencv work.

  C :\opencv\build\common\tbb\ia32\vc10~;C :\opencv\build\x86\vc10\bin~;

• Encode video using ffmpeg from javacv on Android causes native code crash

  13 décembre 2012, par gtcompscientist

  NOTE : I have updated this since originally asking the question to reflect some of what I have learned about loading live camera images into the ffmpeg libraries.

  I am using ffmpeg from javacv compiled for Android to encode/decode video for my application. (Note that originally, I was trying to use ffmpeg-java, but it has some incompatible libraries)

  Original problem : The problem that I've run into is that I am currently getting each frame as a Bitmap (just a plain android.graphics.Bitmap) and I can't figure out how to stuff that into the encoder.

  Solution in javacv's ffmpeg : Use avpicture_fill(), the format from Android is supposedly YUV420P, though I can't verify this until my encoder issues (below) are fixed.

  avcodec.avpicture_fill((AVPicture)mFrame, picPointer, avutil.PIX_FMT_YUV420P, VIDEO_WIDTH, VIDEO_HEIGHT)

  Problem Now : The line that is supposed to actually encode the data crashes the thread. I get a big native code stack trace that I'm unable to understand. Does anybody have a suggestion ?

  Here is the code that I am using to instantiate all the ffmpeg libraries :

      avcodec.avcodec_register_all();
  
      avcodec.avcodec_init();
  
      avformat.av_register_all();
  
  
  
      mCodec = avcodec.avcodec_find_encoder(avcodec.CODEC_ID_H263);
  
      if (mCodec == null)
  
      {
  
          Logging.Log("Unable to find encoder.");
  
          return;
  
      }
  
      Logging.Log("Found encoder.");
  
  
  
      mCodecCtx = avcodec.avcodec_alloc_context();
  
      mCodecCtx.bit_rate(300000);
  
      mCodecCtx.codec(mCodec);
  
      mCodecCtx.width(VIDEO_WIDTH);
  
      mCodecCtx.height(VIDEO_HEIGHT);
  
      mCodecCtx.pix_fmt(avutil.PIX_FMT_YUV420P);
  
      mCodecCtx.codec_id(avcodec.CODEC_ID_H263);
  
      mCodecCtx.codec_type(avutil.AVMEDIA_TYPE_VIDEO);
  
      AVRational ratio = new AVRational();
  
      ratio.num(1);
  
      ratio.den(30);
  
      mCodecCtx.time_base(ratio);
  
      mCodecCtx.coder_type(1);
  
      mCodecCtx.flags(mCodecCtx.flags() | avcodec.CODEC_FLAG_LOOP_FILTER);
  
      mCodecCtx.me_cmp(avcodec.FF_LOSS_CHROMA);
  
      mCodecCtx.me_method(avcodec.ME_HEX);
  
      mCodecCtx.me_subpel_quality(6);
  
      mCodecCtx.me_range(16);
  
      mCodecCtx.gop_size(30);
  
      mCodecCtx.keyint_min(10);
  
      mCodecCtx.scenechange_threshold(40);
  
      mCodecCtx.i_quant_factor((float) 0.71);
  
      mCodecCtx.b_frame_strategy(1);
  
      mCodecCtx.qcompress((float) 0.6);
  
      mCodecCtx.qmin(10);
  
      mCodecCtx.qmax(51);
  
      mCodecCtx.max_qdiff(4);
  
      mCodecCtx.max_b_frames(1);
  
      mCodecCtx.refs(2);
  
      mCodecCtx.directpred(3);
  
      mCodecCtx.trellis(1);
  
      mCodecCtx.flags2(mCodecCtx.flags2() | avcodec.CODEC_FLAG2_BPYRAMID | avcodec.CODEC_FLAG2_WPRED | avcodec.CODEC_FLAG2_8X8DCT | avcodec.CODEC_FLAG2_FASTPSKIP);
  
  
  
      if (avcodec.avcodec_open(mCodecCtx, mCodec) == 0)
  
      {
  
          Logging.Log("Unable to open encoder.");
  
          return;
  
      }
  
      Logging.Log("Encoder opened.");
  
  
  
      mFrameSize = avcodec.avpicture_get_size(avutil.PIX_FMT_YUV420P, VIDEO_WIDTH, VIDEO_HEIGHT);
  
      Logging.Log("Frame size - '" + mFrameSize + "'.");
  
      //mPic = new AVPicture(mPicSize);
  
      mFrame = avcodec.avcodec_alloc_frame();
  
      if (mFrame == null)
  
      {
  
          Logging.Log("Unable to alloc frame.");
  
      }

  This is what I want to be able to execute next :

      BytePointer picPointer = new BytePointer(data);
  
      int bBuffSize = mFrameSize;
  
  
  
      BytePointer bBuffer = new BytePointer(bBuffSize);
  
  
  
      int picSize = 0;
  
      if ((picSize = avcodec.avpicture_fill((AVPicture)mFrame, picPointer, avutil.PIX_FMT_YUV420P, VIDEO_WIDTH, VIDEO_HEIGHT)) <= 0)
  
      {
  
          Logging.Log("Couldn't convert preview to AVPicture (" + picSize + ")");
  
          return;
  
      }
  
      Logging.Log("Converted preview to AVPicture (" + picSize + ")");
  
  
  
      VCAP_Package vPackage = new VCAP_Package();
  
  
  
      if (mCodecCtx.isNull())
  
      {
  
          Logging.Log("Codec Context is null!");
  
      }
  
  
  
      //encode the image
  
      int size = avcodec.avcodec_encode_video(mCodecCtx, bBuffer, bBuffSize, mFrame);
  
  
  
      int totalSize = 0;
  
      while (size >= 0)
  
      {
  
          totalSize += size;
  
          Logging.Log("Encoded '" + size + "' bytes.");
  
          //Get any delayed frames
  
          size = avcodec.avcodec_encode_video(mCodecCtx, bBuffer, bBuffSize, null); 
  
      }
  
      Logging.Log("Finished encoding. (" + totalSize + ")");

  But, as of now, I don't know how to put the Bitmap into the right piece or if I have that setup correctly.

  A few notes about the code :
  - VIDEO_WIDTH = 352
  - VIDEO_HEIGHT = 288
  - VIDEO_FPS = 30 ;

• Fast video compression like Whatsapp

  5 août 2015, par Douglas Anunciação

  I need to speed up video compression in my Android app. I’m using FFMPEG and it takes 3 minutes to compress 80MB video. Does anyone knows a better solution ?

  The command I’m using is :

  /data/data/com.moymer/app_bin/ffmpeg -y -i /storage/emulated/0/DCIM/Camera/VID_20150803_164811363.mp4 -s 640x352 -r 25 -vcodec mpeg4 -ac 1 -preset ultrafast -strict -2 /storage/emulated/0/DCIM/Camera/compressed_video.mp4

  I’m running this command using FFMPEG for Android from this github repo : https://github.com/guardianproject/android-ffmpeg-java

  The code to use FFMPEG in my project is inside an AsyncTask and is copied below :

      @Override
  
      protected Object doInBackground(Object... params) {
  
  
  
          ItemRoloDeCamera compressedVideo = new ItemRoloDeCamera();
  
  
  
          File videoInputFile = new File(video.getSdcardPath());
  
  
  
          File videoFolderFile = videoInputFile.getParentFile();
  
  
  
          File videoOutputFile = new File(videoFolderFile, "video_comprimido_moymer.mp4");
  
  
  
          if (videoFolderFile.exists())
  
              android.util.Log.e("COMPRESS VIDEO UTILS", "video folder exist");
  
          else
  
              android.util.Log.e("COMPRESS VIDEO UTILS", "video folder DON'T exist");
  
  
  
          if (videoInputFile.exists())
  
              android.util.Log.e("COMPRESS VIDEO UTILS", "video input file exist");
  
          else
  
              android.util.Log.e("COMPRESS VIDEO UTILS", "video input file DON'T exist");
  
  
  
          if (videoOutputFile.exists())
  
              android.util.Log.e("COMPRESS VIDEO UTILS", "video output file exist");
  
          else
  
              android.util.Log.e("COMPRESS VIDEO UTILS", "video output file DON'T exist");
  
  
  
          FfmpegController ffmpegController;
  
  
  
          try {
  
  
  
              ffmpegController = new FfmpegController(context, videoFolderFile);
  
  
  
              Clip clipIn = new Clip(videoInputFile.getAbsolutePath());
  
  
  
              ffmpegController.getInfo(clipIn, new ShellUtils.ShellCallback() {
  
                  @Override
  
                  public void shellOut(String shellLine) {
  
                      videoInfo.add(shellLine);
  
                  }
  
  
  
                  @Override
  
                  public void processComplete(int exitValue) {
  
                      videoInfo.add(String.valueOf(exitValue));
  
                  }
  
              });
  
  
  
              int rotate = getRotateMetadata();
  
  
  
              Clip clipOut = new Clip(videoOutputFile.getAbsolutePath());
  
              clipOut.videoFps = "24";
  
              clipOut.videoBitrate = 512;
  
              clipOut.audioChannels = 1;
  
              clipOut.width = 640;
  
              clipOut.height = 352;
  
  
  
              if (rotate == 90)
  
                  clipOut.videoFilter = "transpose=1";
  
              else if (rotate == 180)
  
                  clipOut.videoFilter = "transpose=1,transpose=1";
  
              else if (rotate == 270)
  
                  clipOut.videoFilter = "transpose=1,transpose=1,transpose=1";
  
  
  
              millisDuration = getVideoDuration(videoInputFile.getAbsolutePath());
  
  
  
              float secondsDuration = millisDuration / 1000f;
  
  
  
              clipOut.duration = secondsDuration;
  
  
  
              ffmpegController.processVideo(clipIn, clipOut, true, new ShellUtils.ShellCallback() {
  
                  @Override
  
                  public void shellOut(String shellLine) {
  
  
  
                      android.util.Log.e("COMPRESS VIDEO UTILS", "shellOut - " + shellLine);
  
  
  
                      float percentage = getTimeMetadata(shellLine);
  
  
  
                      if (percentage >= 0f)
  
                          publishProgress(percentage);
  
  
  
                  }
  
  
  
                  @Override
  
                  public void processComplete(int exitValue) {
  
                      android.util.Log.e("COMPRESS VIDEO UTILS", "proccess complete - " + exitValue);
  
                  }
  
              });
  
  
  
  
  
          } catch (IOException e) {
  
              e.printStackTrace();
  
          } catch (Exception e) {
  
              e.printStackTrace();
  
          } finally {
  
  
  
              if (videoOutputFile.exists()) {
  
  
  
                  android.util.Log.e("COMPRESS VIDEO UTILS", "finished ffmpeg ---> video output file exist");
  
  
  
                  compressedVideo.setSdcardPath(videoOutputFile.getAbsolutePath());
  
  
  
                  return compressedVideo;
  
  
  
              } else
  
                  android.util.Log.e("COMPRESS VIDEO UTILS", "finished ffmpeg ---> video output file DON'T exist");
  
  
  
          }
  
  
  
          return compressedVideo;
  
  
  
      }
  
  
  
      private float getTimeMetadata(String shellLine) {
  
  
  
          float percentage = -1;
  
  
  
          if (shellLine.contains("time=")) {
  
  
  
              String[] timeLine = shellLine.split("=");
  
  
  
              String time = timeLine[5];
  
              time = time.replace("bitrate", "");
  
              time = time.trim();
  
  
  
  //            String source = "00:10:17";
  
              String[] tokens = time.split(":");
  
              int secondsToMs = (int) (Float.parseFloat(tokens[2]) * 1000);
  
              int minutesToMs = Integer.parseInt(tokens[1]) * 60000;
  
              int hoursToMs = Integer.parseInt(tokens[0]) * 3600000;
  
              long timeInMillis = secondsToMs + minutesToMs + hoursToMs;
  
  
  
              percentage = (timeInMillis * 100.0f) / millisDuration;
  
  
  
          }
  
  
  
          return percentage;
  
  
  
      }
  
  
  
      private int getRotateMetadata() {
  
  
  
          int rotate = 0;
  
  
  
          String durationString = "";
  
  
  
          for (String shellLine : videoInfo) {
  
  
  
              if (shellLine.contains("rotate")) {
  
  
  
                  //rotate          : 270
  
  
  
                  String[] rotateLine = shellLine.split(":");
  
  
  
                  rotate = Integer.parseInt(rotateLine[1].trim());
  
  
  
              }
  
  
  
          }
  
  
  
          return rotate;
  
  
  
      }
  
  
  
      public static long getVideoDuration(String videoPath) {
  
  
  
          MediaMetadataRetriever retriever = new MediaMetadataRetriever();
  
  
  
          retriever.setDataSource(videoPath);
  
  
  
          String time = retriever
  
                  .extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
  
  
  
          long timeInmillisec = Long.parseLong(time);
  
  
  
          return timeInmillisec;
  
  
  
      }

  The only change I made in the processVideo method was to add the following lines when building the commmand :

  cmd.add("-preset");
  
  cmd.add("ultrafast");