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• Looking for Javacpp FFMPEG CustomIO Example

  26 février 2017, par user1902291

  I am trying to get Custom IO working with JavaCPP FFMPEG. Has anyone succeeded at this ? Can you post your code ?

  Here is mine (Scala), which does not work. It compiles and runs, but does not seem to call my Read and Seek methods

  val readPtr = new Pointer()
  
  val seekPtr = new Pointer()
  
  val userDataPtr = new Pointer()
  
  val read = new Read_packet_Pointer_BytePointer_int(readPtr) {
  
    override def call(userDataPtr: Pointer, @Cast(Array("uint8_t*")) buf: BytePointer, buf_size: Int): Int = {
  
      super.call(userDataPtr, buf, buf_size)
  
    }
  
  }
  
  val seek = new Seek_Pointer_long_int(seekPtr) {
  
    @Cast(Array("int64_t")) override def call(userDataPtr: Pointer, @Cast(Array("int64_t")) offset: Long, whence: Int): Long = {
  
      super.call(userDataPtr, offset, whence)
  
    }
  
  }
  
  
  
  val bufferSize = 1024 * 1024
  
  val readBuffer = new BytePointer(bufferSize)
  
  
  
  val avioContext = avformat.avio_alloc_context(
  
    readBuffer,   // internal buffer
  
    bufferSize,   // and its size
  
    0,            // write flag (1=true,0=false)
  
    userDataPtr,  // user data, will be passed to our callback functions
  
    read,
  
    null,         // no writing
  
    seek
  
  )
  
  
  
  formatContext.pb(avioContext)
  
  formatContext.flags(formatContext.flags | avformat.AVFormatContext.AVFMT_FLAG_CUSTOM_IO)
  
  formatContext.iformat(avformat.av_find_input_format("mp4"))
  
  
  
  avformat.avformat_open_input(formatContext, null.asInstanceOf[String], null, null)

• Use ffmpeg in android for playing video

  14 février 2017, par devxcon

  I am trying use ffmpeg in android. Here is the code so far. I took reference from this project. It just lets me convert video file. But I want to play a video file using ffmpeg. Is it possible ? If yes then how we can do that ?

      package com.ffmpeg;
  
  
  
  import android.support.v7.app.AppCompatActivity;
  
  import android.os.Bundle;
  
  import android.widget.ImageView;
  
  
  
  import com.github.hiteshsondhi88.libffmpeg.ExecuteBinaryResponseHandler;
  
  import com.github.hiteshsondhi88.libffmpeg.FFmpeg;
  
  import com.github.hiteshsondhi88.libffmpeg.LoadBinaryResponseHandler;
  
  import com.github.hiteshsondhi88.libffmpeg.exceptions.FFmpegCommandAlreadyRunningException;
  
  import com.github.hiteshsondhi88.libffmpeg.exceptions.FFmpegNotSupportedException;
  
  
  
  import org.apache.commons.io.FileUtils;
  
  
  
  import java.io.File;
  
  import java.io.IOException;
  
  
  
  public class MainActivity extends AppCompatActivity {
  
  
  
  
  
      Boolean loadedFlag = false;
  
  
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
          if (!loadedFlag) {
  
              FFmpegInitLoader();
  
          }
  
          decodeVideo();
  
      }
  
  
  
      public void FFmpegInitLoader() {
  
          FFmpeg ffmpeg = FFmpeg.getInstance(this);
  
          try {
  
              ffmpeg.loadBinary(new LoadBinaryResponseHandler() {
  
                  @Override
  
                  public void onStart() {
  
                  }
  
  
  
                  @Override
  
                  public void onFailure() {
  
                  }
  
  
  
                  @Override
  
                  public void onSuccess() {
  
                      System.out.println("Successfully loaded FFmpeg!!!");
  
                      loadedFlag = true;
  
                  }
  
  
  
                  @Override
  
                  public void onFinish() {
  
                  }
  
              });
  
          } catch (FFmpegNotSupportedException e) {
  
              System.out.println("Whatever....this thing is not supported :::::::::::::::::::: ");
  
          }
  
      }
  
  
  
      public void decodeVideo() {
  
          FFmpeg ffmpeg = FFmpeg.getInstance(this);
  
          try {
  
              ffmpeg.execute(new String[]{"-y", "-i", "/storage/sdcard0/AVSEQ02.mp4", "-c:v", "libx264", "/storage/sdcard0/conv.mp4"}, new ExecuteBinaryResponseHandler() {
  
                  @Override
  
                  public void onStart() {
  
                      System.out.println("FFmpeg started for decoding");
  
                  }
  
  
  
                  @Override
  
                  public void onProgress(String message) {
  
                      System.out.println("progress message:::: " + message);
  
                  }
  
  
  
                  @Override
  
                  public void onFailure(String message) {
  
                      System.out.println("failure message:::: " + message);
  
                  }
  
  
  
                  @Override
  
                  public void onSuccess(String message) {
  
                      System.out.println("success message:::: " + message);
  
                  }
  
  
  
                  @Override
  
                  public void onFinish() {
  
                  }
  
              });
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              System.out.println("already running::::::");
  
          }
  
      }
  
  }

• playing video in android using javacv ffmpeg

  20 février 2017, par d91

  I’m trying to play a video stored in sd card using javacv. Following is my code

  public class MainActivity extends AppCompatActivity {
  
  
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
          playthevideo();
  
      }
  
  
  
      protected void playthevideo() {
  
  
  
         String imageInSD = "/storage/080A-0063/dama/" + "test3.mp4";
  
  
  
         FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(imageInSD);
  
  
  
         AndroidFrameConverter converterToBitmap = new AndroidFrameConverter();
  
  
  
         OpenCVFrameConverter.ToIplImage converterToipi = new OpenCVFrameConverter.ToIplImage();
  
  
  
             try {
  
                 Log.d("Tag", "try");
  
                 grabber.start();
  
                 Log.d("Tag", "started");
  
  
  
                 int i = 0;
  
                 IplImage grabbedImage = null;
  
  
  
                 ImageView mimg = (ImageView) findViewById(R.id.a);
  
  
  
                 grabber.setFrameRate(grabber.getFrameRate());
  
                 ArrayList<bitmap> bitmapArray = new ArrayList<bitmap>();
  
                 while (((grabbedImage = converterToipi.convert(grabber.grabImage())) != null)) {
  
  
  
                     Log.d("Tag", String.valueOf(i));
  
  
  
                     int width = grabbedImage.width();
  
  
  
                     int height = grabbedImage.height();
  
  
  
                     if (grabbedImage == null) {
  
                         Log.d("Tag", "error");
  
                     }
  
  
  
                     IplImage container = IplImage.create(width, height, IPL_DEPTH_8U, 4);
  
  
  
                     cvCvtColor(grabbedImage, container, CV_BGR2RGBA);
  
  
  
                     Bitmap bitmapnew = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
  
  
  
                     bitmapnew.copyPixelsFromBuffer(container.getByteBuffer());
  
  
  
                     if (bitmapnew == null) {
  
                         Log.d("Tag", "bit error");
  
                     }
  
  
  
                     mimg.setImageBitmap(bitmapnew);
  
  
  
                     mimg.requestFocus();
  
  
  
                     i++;
  
                 }
  
  
  
                 Log.d("Tag", "go");
  
  
  
             }
  
             catch(Exception e) {
  
  
  
            }
  
       }
  
  }
  
  </bitmap></bitmap>

  just ignore the tags because those are only for my testing purposes..
  When I run this code the main activity layout is still loading while android monitor shows the value of "i" (which is current frame number) and suddenly after frame number 3671 code exits the while loop and the imageview shows a frame which is not the end frame of that video(it somewhere around staring of the video).
  I was unable to find a way to show the grabbed frames from ffmpegframegrabber so i decided to show the image in imageview in this way. Can anybody tell me why I’m getting this error or another error non path to play and show the video in android activity ?
  BTW javacv 1.3.1 is imported correctly into my android dev environment. Thanks.