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• encoding .avi file from bytearray using ffmpeg in javacv or java

  24 janvier 2012, par Ashwin Yakkundi

  I have converted an .avi file into byte[]. What I need to do is to convert the byte[] back to the original .avi file in java or javacv preferably using ffmpeg.

  The following is the code I used for conversion from .avi into byte[]

  import com.googlecode.javacv.cpp.opencv_core.IplImage;
  
  import com.googlecode.javacv.CanvasFrame;
  
  import com.googlecode.javacv.FFmpegFrameGrabber;
  
  
  
  import java.io.BufferedInputStream;
  
  import java.io.DataInputStream;
  
  import java.io.File;
  
  import java.io.FileInputStream;
  
  
  
  public class VideoDemoTest1{
  
  
  
      public static void main(String[] args) throws Exception {
  
          String filename = "/home/ashwin/Desktop/cow.avi";
  
  
  
          FileInputStream fis = new FileInputStream (filename);
  
          DataInputStream dis = new DataInputStream(fis);
  
          int length = dis.available();
  
          System.out.println("length of InputStream = " + length);
  
  
  
          byte[] videoByteArray = new byte[(int) length];
  
  
  
          // Read in the bytes
  
          int offset = 0;
  
          int numRead = 0;
  
          while (offset < videoByteArray.length
  
                 && (numRead = dis.read(videoByteArray, offset, videoByteArray.length - offset)) >= 0) {
  
                      offset += numRead;
  
          }
  
  
  
          System.out.println("length of videoByteArray is " + videoByteArray.length);
  
      }
  
  }

• Catch if the Java proccess crashed

  17 janvier 2012, par VSheyanov

  I run java process to convert video using ffmpeg.exe.

  Runtime rt = Runtime.getRuntime();
  
  String cmd = FFMPEGFULLPATH + " -y -i " + '"' + mpeg4File + '"' + " -vcodec libx264 -vsync 2 " + '"' + H264file + '"';
  
  
  
  Process pr = rt.exec(cmd);
  
  
  
  ThreadedTranscoderIO errorHandler = new ThreadedTranscoderIO(pr.getErrorStream(), "Error Stream");
  
  errorHandler.start();
  
  ThreadedTranscoderIO inputHandler = new ThreadedTranscoderIO(pr.getInputStream(), "Output Stream");
  
  inputHandler.start();
  
  
  
  try {
  
        pr.waitFor();
  
  } catch (InterruptedException e) {
  
        LiveApplication.logger.info("Some shit happens during convertation 2 ");
  
        throw new IOException("UseTranscoderBlocking - Run_FFMPEG - process interrupted " + e);                  
  
  }

  But when the process started, sometimes especially with big files, but not always i get this windows message :

  

  This happens only on Windows server 2008 and didn't happened on Windows 7.

  I have 2 questions :

  1. Why this process fails ?
  2. Can I catch this fail in Java, close
     this window and continue thread execution (maybe I'll restart this
     proccess).

  Thanks !

• Video on demand problems [closed]

  27 février 2013, par user2113675

  With playing videos in adobe flash player im able to play mp4 in a flv container in chrome. But for browsers like firefox or safari this wont work. Is there a way to play flv in safari at all.