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• JavaCV grab frame method delays and returns old frames

  27 janvier 2019, par Null Pointer

  I’m trying to create a video player in Java using JavaCV and its FFmpegFrameGrabber class. Simply, Inside a loop, I use

  .grab() to get a frame and then paint it on a panel

  Problem is, player gets delayed. For example, after 30 seconds passes, in video only 20 seconds passes.

  Source is ok. Other players can play the stream normally. Problem is possibly the long printing time.

  What I do not understand is that : "why does .grab() method brings me a frame from 10 seconds ago ?" Shouldn’t it just grab the frame which is being streamed at the moment ?

  (Sorry for not providing a working code, it’s all over different huge classes)

  I use the following grabber options (selected by some other colleague) :

  grabber.setImageHeight(480);
  
  grabber.setImageWidth(640);
  
  grabber.setOption("reconnect", "1");
  
  grabber.setOption("reconnect_at_eof", "1");
  
  grabber.setOption("reconnect_streamed", "1");
  
  grabber.setOption("reconnect_delay_max", "2");
  
  grabber.setOption("preset", "veryfast");
  
  grabber.setOption("probesize", "192");
  
  grabber.setOption("tune", "zerolatency");
  
  grabber.setFrameRate(30.0);
  
  grabber.setOption("buffer_size", "" + this.bufferSize);
  
  grabber.setOption("max_delay", "500000");
  
  grabber.setOption("stimeout", String.valueOf(6000000));
  
  grabber.setOption("loglevel", "quiet");
  
  grabber.start();

  Thanks

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  5 octobre 2010, par Scott Schiller

  m script/soundmanager2-jsmin.js m script/soundmanager2-nodebug-jsmin.js m script/soundmanager2-nodebug.js m script/soundmanager2.js Removed some unused declarations (per jslint), grouped private methods together, DOMContentLoaded event cleanup ; Better pre-init/unsupported warning messaging for (...)

• Removed some unused declarations (per jslint), grouped private methods together, DOMContentLoaded event cleanup ; Better pre-init/unsupported warning messaging for play/createSound() calls made before init or if SM2 is otherwise unavailable (eg., failed to start) - no longer throws an error object, just console.warn()-style messaging.

  5 octobre 2010, par Scott Schiller

  m script/soundmanager2-jsmin.js m script/soundmanager2-nodebug-jsmin.js m script/soundmanager2-nodebug.js m script/soundmanager2.js Removed some unused declarations (per jslint), grouped private methods together, DOMContentLoaded event cleanup ; Better pre-init/unsupported warning messaging for (...)