1 /** 2 * This file Copyright (c) 2013-2017 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.dam.preview.xuggle; 35 36 import java.awt.image.BufferedImage; 37 38 import com.xuggle.mediatool.IMediaReader; 39 import com.xuggle.mediatool.MediaListenerAdapter; 40 import com.xuggle.mediatool.ToolFactory; 41 import com.xuggle.mediatool.event.IVideoPictureEvent; 42 43 /** 44 * Class to extract frame from video using Xuggle. 45 */ 46 public class XuggleCaptureFrames extends MediaListenerAdapter { 47 private int mVideoStreamIndex = -1; 48 private boolean gotFirst = false; 49 private String videoFile; 50 private Exception e; 51 private BufferedImage image; 52 53 /** 54 * @param filename the name of the media file to read 55 */ 56 public XuggleCaptureFrames(String videoFile) { 57 this.videoFile = videoFile; 58 this.e = null; 59 } 60 61 public BufferedImage execute() throws Exception { 62 IMediaReader reader = ToolFactory.makeReader(videoFile); 63 64 // BufferedImages created in BGR 24bit color space 65 reader.setBufferedImageTypeToGenerate(BufferedImage.TYPE_3BYTE_BGR); 66 67 // xuggle is event based 68 reader.addListener(this); 69 70 // read out the contents of the media file ... rest is done in listener 71 while (reader.readPacket() == null && !gotFirst) { 72 // nothing extra to do here 73 } 74 75 // re-throw exception if any 76 if (e != null) { 77 throw e; 78 } 79 80 return image; 81 } 82 83 /** 84 * Called after a video frame has been decoded from a media stream. 85 * This method blocks, so return quickly. 86 */ 87 @Override 88 public void onVideoPicture(IVideoPictureEvent event) { 89 try { 90 // if the stream index does not match the selected stream index, then have a closer look 91 if (event.getStreamIndex() != mVideoStreamIndex) { 92 // if the selected video stream id is not yet set, go ahead an select this lucky video stream 93 if (-1 == mVideoStreamIndex) { 94 mVideoStreamIndex = event.getStreamIndex(); 95 } else { 96 // otherwise return, no need to show frames from this video stream 97 return; 98 } 99 } 100 101 image = event.getImage(); 102 gotFirst = true; 103 } catch (Exception e) { 104 this.e = e; 105 } 106 } 107 }