001/* 002 * (C) Copyright 2010-2015 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 * 019 */ 020package org.nuxeo.ecm.platform.video.convert; 021 022import static org.nuxeo.ecm.platform.video.convert.Constants.POSITION_PARAMETER; 023 024import java.io.IOException; 025import java.io.Serializable; 026import java.util.Map; 027 028import org.apache.commons.io.FilenameUtils; 029import org.apache.commons.logging.Log; 030import org.apache.commons.logging.LogFactory; 031import org.nuxeo.ecm.core.api.Blob; 032import org.nuxeo.ecm.core.api.Blobs; 033import org.nuxeo.ecm.core.api.CloseableFile; 034import org.nuxeo.ecm.core.api.blobholder.BlobHolder; 035import org.nuxeo.ecm.core.convert.api.ConversionException; 036import org.nuxeo.ecm.core.convert.cache.SimpleCachableBlobHolder; 037import org.nuxeo.ecm.core.convert.extension.Converter; 038import org.nuxeo.ecm.core.convert.extension.ConverterDescriptor; 039import org.nuxeo.ecm.platform.commandline.executor.api.CmdParameters; 040import org.nuxeo.ecm.platform.commandline.executor.api.CommandException; 041import org.nuxeo.ecm.platform.commandline.executor.api.CommandLineExecutorService; 042import org.nuxeo.ecm.platform.commandline.executor.api.CommandNotAvailable; 043import org.nuxeo.ecm.platform.commandline.executor.api.ExecResult; 044import org.nuxeo.runtime.api.Framework; 045 046/** 047 * Extract a JPEG screenshot of the video at a given time offset (position). 048 * 049 * @author ogrisel 050 */ 051public class ScreenshotConverter extends BaseVideoConverter implements Converter { 052 053 public static final Log log = LogFactory.getLog(ScreenshotConverter.class); 054 055 public static final String FFMPEG_SCREENSHOT_COMMAND = "ffmpeg-screenshot"; 056 057 @Override 058 public void init(ConverterDescriptor descriptor) { 059 } 060 061 @Override 062 public BlobHolder convert(BlobHolder blobHolder, Map<String, Serializable> parameters) throws ConversionException { 063 Blob blob = blobHolder.getBlob(); 064 if (blob == null) { 065 throw new ConversionException("conversion failed (null blob)"); 066 } 067 try (CloseableFile source = blob.getCloseableFile("." + FilenameUtils.getExtension(blob.getFilename()))) { 068 Blob outBlob = Blobs.createBlobWithExtension(".jpeg"); 069 070 CommandLineExecutorService cles = Framework.getLocalService(CommandLineExecutorService.class); 071 CmdParameters params = cles.getDefaultCmdParameters(); 072 params.addNamedParameter("inFilePath", source.getFile().getAbsolutePath()); 073 params.addNamedParameter("outFilePath", outBlob.getFile().getAbsolutePath()); 074 Double position = 0.0; 075 if (parameters != null) { 076 position = (Double) parameters.get(POSITION_PARAMETER); 077 if (position == null) { 078 position = 0.0; 079 } 080 } 081 long positionParam = Math.round(position); 082 params.addNamedParameter(POSITION_PARAMETER, String.valueOf(positionParam)); 083 ExecResult res = cles.execCommand(FFMPEG_SCREENSHOT_COMMAND, params); 084 if (!res.isSuccessful()) { 085 throw res.getError(); 086 } 087 088 outBlob.setMimeType("image/jpeg"); 089 outBlob.setFilename(String.format("video-screenshot-%05d.000.jpeg", positionParam)); 090 return new SimpleCachableBlobHolder(outBlob); 091 } catch (CommandNotAvailable | IOException | CommandException e) { 092 throw new ConversionException("error extracting screenshot from '" + blob.getFilename() + "'", e); 093 } 094 } 095 096}