java压缩视频

引入依赖

        <dependency><groupId>ws.schild</groupId><artifactId>jave-core</artifactId><version>3.0.0</version></dependency><dependency><groupId>ws.schild</groupId><artifactId>jave-all-deps</artifactId><version>3.0.1</version></dependency>

压缩视频

package junit;
import ws.schild.jave.Encoder;
import ws.schild.jave.MultimediaObject;
import ws.schild.jave.encode.AudioAttributes;
import ws.schild.jave.encode.EncodingAttributes;
import ws.schild.jave.encode.VideoAttributes;
import ws.schild.jave.info.AudioInfo;
import ws.schild.jave.info.VideoSize;import java.io.*;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.channels.FileChannel;public class TestVideo {public static void main(String[] args) {File sourceFile = new File("/Users/4paradigm/Desktop/qqqqq.mov");compressionVideo(sourceFile,"4564564.mov");}/*** 传视频File对象，返回压缩后File对象信息* @param source*/public static File compressionVideo(File source,String picName) {if(source == null){return null;}//压缩文件的输出绝对路径String newPath = source.getAbsolutePath().substring(0, source.getAbsolutePath().lastIndexOf(File.separator)).concat(File.separator).concat(picName);File target = new File(newPath);try {MultimediaObject object = new MultimediaObject(source);AudioInfo audioInfo = object.getInfo().getAudio();// 根据视频大小来判断是否需要进行压缩,int maxSize = 7;//视频字节长度  /  1024*1024  换算成MB单位   向上取整double mb = Math.ceil(source.length()/ 1048576);//获取视频时间int second = (int)object.getInfo().getDuration()/1000;BigDecimal bd = new BigDecimal(String.format("%.4f", mb/second));System.out.println("开始压缩视频了--> 视频每秒平均 "+ bd +" MB ");
//            // 视频 > 7MB, 或者每秒 > 0.5 MB 才做压缩， 不需要的话可以把判断去掉
//            boolean temp = mb > maxSize || bd.compareTo(new BigDecimal(0.5)) > 0;// 视频 > 7MB,  才做压缩， 不需要的话可以把判断去掉boolean temp = mb > maxSize;if(temp){long time = System.currentTimeMillis();//TODO 视频属性设置int maxBitRate = 128000;int maxSamplingRate = 44100;int bitRate = 800000;int maxFrameRate = 20;int maxWidth = 1280;AudioAttributes audio = new AudioAttributes();// 设置通用编码格式10                   audio.setCodec("aac");// 设置最大值：比特率越高，清晰度/音质越好// 设置音频比特率,单位:b (比特率越高，清晰度/音质越好，当然文件也就越大 128000 = 182kb)if(audioInfo.getBitRate() > maxBitRate){audio.setBitRate(new Integer(maxBitRate));}// 设置重新编码的音频流中使用的声道数（1 =单声道，2 = 双声道（立体声））。如果未设置任何声道值，则编码器将选择默认值 0。audio.setChannels(audioInfo.getChannels());// 采样率越高声音的还原度越好，文件越大// 设置音频采样率，单位：赫兹 hz// 设置编码时候的音量值，未设置为0,如果256，则音量值不会改变// audio.setVolume(256);if(audioInfo.getSamplingRate() > maxSamplingRate){audio.setSamplingRate(maxSamplingRate);}//TODO 视频编码属性配置ws.schild.jave.info.VideoInfo videoInfo = object.getInfo().getVideo();VideoAttributes video = new VideoAttributes();video.setCodec("h264");//设置音频比特率,单位:b (比特率越高，清晰度/音质越好，当然文件也就越大 800000 = 800kb)if(videoInfo.getBitRate() > bitRate){video.setBitRate(bitRate);}// 视频帧率：15 f / s  帧率越低，效果越差// 设置视频帧率（帧率越低，视频会出现断层，越高让人感觉越连续），视频帧率（Frame rate）是用于测量显示帧数的量度。所谓的测量单位为每秒显示帧数(Frames per Second，简：FPS）或“赫兹”（Hz）。if(videoInfo.getFrameRate() > maxFrameRate){video.setFrameRate(maxFrameRate);}// 限制视频宽高int width = videoInfo.getSize().getWidth();int height = videoInfo.getSize().getHeight();if(width > maxWidth){float rat = (float) width / maxWidth;video.setSize(new VideoSize(maxWidth,(int)(height/rat)));}EncodingAttributes attr = new EncodingAttributes();
//                attr.setFormat("mp4");attr.setAudioAttributes(audio);attr.setVideoAttributes(video);// 速度最快的压缩方式， 压缩速度 从快到慢： ultrafast, superfast, veryfast, faster, fast, medium,  slow, slower, veryslow and placebo.
//                attr.setPreset(PresetUtil.VERYFAST);
//                attr.setCrf(27);
//                // 设置线程数
//                attr.setEncodingThreads(Runtime.getRuntime().availableProcessors()/2);Encoder encoder = new Encoder();encoder.encode(new MultimediaObject(source), target, attr);System.out.println("压缩总耗时：" + (System.currentTimeMillis() - time)/1000);return target;}} catch (Exception e) {e.printStackTrace();}finally {if(target.length() > 0){source.delete();}}return source;}
}