001/* 002 * (C) Copyright 2010-2015 Nuxeo SA (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl-2.1.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * Nuxeo - initial API and implementation 016 * 017 */ 018package org.nuxeo.ecm.platform.video.convert; 019 020import static org.nuxeo.ecm.platform.video.convert.Constants.POSITION_PARAMETER; 021 022import java.io.IOException; 023import java.io.Serializable; 024import java.util.Map; 025 026import org.apache.commons.io.FilenameUtils; 027import org.apache.commons.logging.Log; 028import org.apache.commons.logging.LogFactory; 029import org.nuxeo.ecm.core.api.Blob; 030import org.nuxeo.ecm.core.api.Blobs; 031import org.nuxeo.ecm.core.api.CloseableFile; 032import org.nuxeo.ecm.core.api.blobholder.BlobHolder; 033import org.nuxeo.ecm.core.convert.api.ConversionException; 034import org.nuxeo.ecm.core.convert.cache.SimpleCachableBlobHolder; 035import org.nuxeo.ecm.core.convert.extension.Converter; 036import org.nuxeo.ecm.core.convert.extension.ConverterDescriptor; 037import org.nuxeo.ecm.platform.commandline.executor.api.CmdParameters; 038import org.nuxeo.ecm.platform.commandline.executor.api.CommandException; 039import org.nuxeo.ecm.platform.commandline.executor.api.CommandLineExecutorService; 040import org.nuxeo.ecm.platform.commandline.executor.api.CommandNotAvailable; 041import org.nuxeo.ecm.platform.commandline.executor.api.ExecResult; 042import org.nuxeo.runtime.api.Framework; 043 044/** 045 * Extract a JPEG screenshot of the video at a given time offset (position). 046 * 047 * @author ogrisel 048 */ 049public class ScreenshotConverter extends BaseVideoConverter implements Converter { 050 051 public static final Log log = LogFactory.getLog(ScreenshotConverter.class); 052 053 public static final String FFMPEG_SCREENSHOT_COMMAND = "ffmpeg-screenshot"; 054 055 @Override 056 public void init(ConverterDescriptor descriptor) { 057 } 058 059 @Override 060 public BlobHolder convert(BlobHolder blobHolder, Map<String, Serializable> parameters) throws ConversionException { 061 Blob blob = blobHolder.getBlob(); 062 if (blob == null) { 063 throw new ConversionException("conversion failed (null blob)"); 064 } 065 try (CloseableFile source = blob.getCloseableFile("." + FilenameUtils.getExtension(blob.getFilename()))) { 066 Blob outBlob = Blobs.createBlobWithExtension(".jpeg"); 067 068 CommandLineExecutorService cles = Framework.getLocalService(CommandLineExecutorService.class); 069 CmdParameters params = cles.getDefaultCmdParameters(); 070 params.addNamedParameter("inFilePath", source.getFile().getAbsolutePath()); 071 params.addNamedParameter("outFilePath", outBlob.getFile().getAbsolutePath()); 072 Double position = 0.0; 073 if (parameters != null) { 074 position = (Double) parameters.get(POSITION_PARAMETER); 075 if (position == null) { 076 position = 0.0; 077 } 078 } 079 long positionParam = Math.round(position); 080 params.addNamedParameter(POSITION_PARAMETER, String.valueOf(positionParam)); 081 ExecResult res = cles.execCommand(FFMPEG_SCREENSHOT_COMMAND, params); 082 if (!res.isSuccessful()) { 083 throw res.getError(); 084 } 085 086 outBlob.setMimeType("image/jpeg"); 087 outBlob.setFilename(String.format("video-screenshot-%05d.000.jpeg", positionParam)); 088 return new SimpleCachableBlobHolder(outBlob); 089 } catch (CommandNotAvailable | IOException | CommandException e) { 090 throw new ConversionException("error extracting screenshot from '" + blob.getFilename() + "'", e); 091 } 092 } 093 094}