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• outOfMemoryError from javacv

  14 février 2018, par Maharjun M

  We are using javacv library for creating thumbnails out of videos. We are able to create thumbnails. But when we upload more videos (20 to 30 of 10MB to 40MB) the application is throwing outOfMemoryError.

  We are using 1.3.1 version of javacv.
  Here is the pom.xml file.

      <dependency>
  
          <groupid>org.bytedeco</groupid>
  
          <artifactid>javacv</artifactid>
  
          <version>1.3.1</version>
  
      </dependency>

  Here is the code

  public BufferedImage generateThumbnail(File outputVideoFile) throws IOException {
  
        BufferedImage bufferedImage = null;
  
      try {
  
          FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber(outputVideoFile);
  
          frameGrabber.start();
  
          Frame grabKeyFrame = frameGrabber.grabKeyFrame();
  
          Java2DFrameConverter java2DFrameConverter = new Java2DFrameConverter();
  
          bufferedImage = java2DFrameConverter.convert(grabKeyFrame);
  
          frameGrabber.stop();
  
      } catch (Exception e) {
  
          throw new RuntimeException(e);
  
      }
  
      return bufferedImage;
  
  }

  Here is the error

   java.lang.OutOfMemoryError: Physical memory usage is too high: physicalBytes = 3G > maxPhysicalBytes = 3G
  
  org.bytedeco.javacpp.Pointer.deallocator(Pointer.java:562)
  
  org.bytedeco.javacpp.Pointer.init(Pointer.java:121)
  
  org.bytedeco.javacpp.avcodec$AVPacket.allocate(Native Method)
  
  org.bytedeco.javacpp.avcodec$AVPacket.<init>(avcodec.java:1696)
  
  org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:471)
  
  org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:462)
  
  org.bahmni.module.bahmnimsf.extension.PatientDocumentThumbnailGenerator.generateThumbnail(PatientDocumentThumbnailGenerator.java:40)
  
  org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:961)
  
  </init>

  I tried to upgrade the version to 1.4 though it’s not working.
  Somebody told me to use System.gc() that also not working.

  Can someone suggest the solution ? thanks in advance.

• ffmpeg fluent live streaming to youtube not working

  18 octobre 2020, par Ricky

  I am learning how to using ffmpeg fluent and I am having trouble getting it to stream live to Youtube

  



  here is the command I have tried :

  



  let streamYT = (YTrtmpKey) => {
  var proc3 = new ffmpeg({ source: inputURL, timeout: 0 })
    .addOption('-vcodec', 'libx264')
    .addOption('-acodec', 'aac')
    .addOption('-crf', 26)
    .addOption('-aspect', '640:360')
    .withSize('640x360')
    .on('start', function(commandLine) {
    console.log('Query : ' + commandLine);
    })
    .on('error', function(err) {
    console.log('Error: ' + err.message);
    })
    .output('rtmp://a.rtmp.youtube.com/live2/' + YTrtmpKey, function(stdout, stderr) {
    console.log('Convert complete' +stdout);
  });
  }


  



  this doesn't throw any errors but also doesn't do anything

  


• FFMPEG Doesn't Finish Compressing [duplicate]

  11 février 2018, par MBJH

  This question already has an answer here :

  • Runtime Exec stop unexpectedly
    
    1 answer
    

  I have this code which executes a ffmpeg command to compress a video file to .mp4

  Process ffmpeg=Runtime.getRuntime().exec(cmdLine, null, cd);

  And the ffmpeg command works just fine & everything compresses. But I need to trigger some code once it is finished. I tried this :

  try {
  
      ffmpeg.waitFor();
  
  } catch(InterruptedException ex) {
  
      ex.printStackTrace();
  
  } finally {
  
      new Update_Delete(con).compressed(Integer.parseInt(path.substring(path.lastIndexOf("\\")+5, path.lastIndexOf("\\")+6)));
  
      System.gc();
  
      new File(path).delete();   
  
  }

  And this :

  while (ffmpeg.isAlive()) {
  
  
  
  }
  
  new Update_Delete(con).compressed(Integer.parseInt(path.substring(path.lastIndexOf("\\")+5, path.lastIndexOf("\\")+6)));
  
  System.gc();
  
  new File(path).delete();

  But the file does not finish compressing. I waited a whole 20 minutes but the 54 second file did not compress. It also does not throw an InterruptedException. Please leave me the code I can use to do this. Thanks