001/* 002 * (C) Copyright 2010-2016 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Nuxeo - initial API and implementation 018 */ 019package org.nuxeo.ecm.platform.video.convert; 020 021import static org.nuxeo.ecm.platform.video.convert.Constants.POSITION_PARAMETER; 022 023import java.io.IOException; 024import java.io.Serializable; 025import java.util.Map; 026 027import org.apache.commons.io.FilenameUtils; 028import org.apache.commons.logging.Log; 029import org.apache.commons.logging.LogFactory; 030import org.nuxeo.ecm.core.api.Blob; 031import org.nuxeo.ecm.core.api.Blobs; 032import org.nuxeo.ecm.core.api.CloseableFile; 033import org.nuxeo.ecm.core.api.blobholder.BlobHolder; 034import org.nuxeo.ecm.core.convert.api.ConversionException; 035import org.nuxeo.ecm.core.convert.cache.SimpleCachableBlobHolder; 036import org.nuxeo.ecm.core.convert.extension.Converter; 037import org.nuxeo.ecm.core.convert.extension.ConverterDescriptor; 038import org.nuxeo.ecm.platform.commandline.executor.api.CmdParameters; 039import org.nuxeo.ecm.platform.commandline.executor.api.CommandException; 040import org.nuxeo.ecm.platform.commandline.executor.api.CommandLineExecutorService; 041import org.nuxeo.ecm.platform.commandline.executor.api.CommandNotAvailable; 042import org.nuxeo.ecm.platform.commandline.executor.api.ExecResult; 043import org.nuxeo.runtime.api.Framework; 044 045/** 046 * Extract a JPEG screenshot of the video at a given time offset (position). 047 * 048 * @author ogrisel 049 */ 050public class ScreenshotConverter implements Converter { 051 052 public static final Log log = LogFactory.getLog(ScreenshotConverter.class); 053 054 public static final String FFMPEG_SCREENSHOT_COMMAND = "ffmpeg-screenshot"; 055 056 @Override 057 public void init(ConverterDescriptor descriptor) { 058 } 059 060 @Override 061 public BlobHolder convert(BlobHolder blobHolder, Map<String, Serializable> parameters) throws ConversionException { 062 Blob blob = blobHolder.getBlob(); 063 if (blob == null) { 064 throw new ConversionException("conversion failed (null blob)"); 065 } 066 try (CloseableFile source = blob.getCloseableFile("." + FilenameUtils.getExtension(blob.getFilename()))) { 067 Blob outBlob = Blobs.createBlobWithExtension(".jpeg"); 068 069 CommandLineExecutorService cles = Framework.getLocalService(CommandLineExecutorService.class); 070 CmdParameters params = cles.getDefaultCmdParameters(); 071 params.addNamedParameter("inFilePath", source.getFile().getAbsolutePath()); 072 params.addNamedParameter("outFilePath", outBlob.getFile().getAbsolutePath()); 073 Double position = 0.0; 074 if (parameters != null) { 075 position = (Double) parameters.get(POSITION_PARAMETER); 076 if (position == null) { 077 position = 0.0; 078 } 079 } 080 long positionParam = Math.round(position); 081 params.addNamedParameter(POSITION_PARAMETER, String.valueOf(positionParam)); 082 ExecResult res = cles.execCommand(FFMPEG_SCREENSHOT_COMMAND, params); 083 if (!res.isSuccessful()) { 084 throw res.getError(); 085 } 086 087 outBlob.setMimeType("image/jpeg"); 088 outBlob.setFilename(String.format("video-screenshot-%05d.000.jpeg", positionParam)); 089 return new SimpleCachableBlobHolder(outBlob); 090 } catch (CommandNotAvailable | IOException | CommandException e) { 091 throw new ConversionException("error extracting screenshot from '" + blob.getFilename() + "'", e); 092 } 093 } 094 095}