问停止JavaCV回放警告

EN

package test.javacv;

import java.io.File;

import org.bytedeco.javacv.CanvasFrame;
import org.bytedeco.javacv.FFmpegFrameGrabber;
import org.bytedeco.javacv.Frame;

import org.bytedeco.javacv.CustomLogCallback;

public class TestPlay implements Runnable {
 private static String      video_loc = null;
 private static CanvasFrame canvas    = new CanvasFrame("Test JavaCV player");

 public static void main(String[] args) { new Thread(new TestPlay(args[0])).start(); }

 static {
  CustomLogCallback.set();
 }

 public void run() { play_video(video_loc); }

 public TestPlay(String loc) {
  video_loc = loc;
  canvas.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
 }

 public static final void play_video(String vid_loc) {
  try {
   File               file      = new File(vid_loc);
   FFmpegFrameGrabber ffmpeg_fg = new FFmpegFrameGrabber(file.getAbsolutePath());
   Frame              frm;
   ffmpeg_fg.setAudioChannels(0);
   ffmpeg_fg.start();
   for(;;)
    if((frm = ffmpeg_fg.grab()) != null) canvas.showImage(frm);
    else {
     ffmpeg_fg.setTimestamp(0);
     break;
    }
   ffmpeg_fg.stop();
  } catch(Exception ex) { ex("play_video vid_loc:" + vid_loc, ex); }
 }

 public static final void ex(String txt, Exception ex)   {
  System.out.println("EXCEPTION: " + txt + " stack..."); ex.printStackTrace(System.out); }
}

// custom logger to override all logging output
package org.bytedeco.javacv;

import org.bytedeco.javacpp.BytePointer;

import static org.bytedeco.javacpp.avutil.LogCallback;
import static org.bytedeco.javacpp.avutil.setLogCallback;

public class CustomLogCallback extends LogCallback {

 static final CustomLogCallback instance = new CustomLogCallback();

 public static CustomLogCallback getInstance() { return instance; }

 public static void set() { setLogCallback(getInstance()); }

 @Override
 public void call(int level, BytePointer msg) {}
}