zoukankan      html  css  js  c++  java
  • Java 压缩视频(无需安装插件)

    亲测可用,基于ffmpeg 去进行压缩,

    测试原视频大小:835.87 MB
    压缩后大小:118.8 MB
    压缩比率 :85.78%

    压缩视频jar包源码地址 : https://github.com/a-schild/jave2

     好了,开始上代码

    1、首先 pom文件中引入下面两个 jar 包

    <dependency>
    <groupId>ws.schild</groupId>
    <artifactId>jave-core</artifactId>
    <version>2.7.3</version>
    </dependency>


    具体引用包按本机操作系统来设定

    <dependency>
    <groupId>ws.schild</groupId>
    <artifactId>jave-nativebin-osx64</artifactId>
    <version>2.7.3</version>
    </dependency>



    java 代码
    /**
    * 传远程视频连接,返回压缩后File
    */
    public static File compressionVideo(String href){
    try{
         // 缓存到临时目录,压缩上传完到远程服务器上之后,记得删除源视频
    String savePath = "/tmp/tempVideo/";
    long time = System.currentTimeMillis();
    URL url=new URL(href);
    HttpURLConnection connection=(HttpURLConnection)url.openConnection();
    connection.setConnectTimeout(600*1000);
    connection.setRequestProperty("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.110 Safari/537.36");
    InputStream in=connection.getInputStream();
    String fileName = "zip" + href.substring(href.lastIndexOf("/") + 1);
    File saveDir = new File(savePath);
    if(!saveDir.exists()){
    saveDir.mkdirs();
    }
    File file = new File(savePath + fileName);
    OutputStream out=new FileOutputStream(file);
    byte[] bytes=new byte[1024];
    int len = 0;
    while((len=in.read(bytes))!=-1){
    out.write(bytes,0,len);
    }
    out.close();
    in.close();
    System.out.println("下载+压缩 总耗时:" + (System.currentTimeMillis() - time)/1000);
    return compressionVideo(file, fileName);
    }catch (Exception e){
    e.printStackTrace();
    }
    return null;
    }


    /**
    * 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;
    }
    String newPath = source.getAbsolutePath().substring(0, source.getAbsolutePath().lastIndexOf("/")).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 = 100;
    double mb = Math.ceil(source.length()/ 1048576);
    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 > 100MB, 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;
    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
    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
    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;
    }
    /**
    * 获取视频大小
    * @param source
    * @return
    */
    @SuppressWarnings({ "resource" })
    public static BigDecimal ReadVideoSize(File source) {
    FileChannel fc = null;
    try {
    FileInputStream fis = new FileInputStream(source);
    fc = fis.getChannel();
    BigDecimal fileSize = new BigDecimal(fc.size());
    return fileSize.divide(new BigDecimal(1048576), 2, RoundingMode.HALF_UP);
    } catch (FileNotFoundException e) {
    e.printStackTrace();
    } catch (IOException e) {
    e.printStackTrace();
    } finally {
    if (null != fc) {
    try {
    fc.close();
    } catch (IOException e) {
    e.printStackTrace();
    }
    }
    }
    return null;
    }


    ##测试
    public static void main(String[] args) throws Exception{
    String savePath = "/tmp/tempVideo/";
    File saveDir = new File(savePath);
    if(!saveDir.exists()){
    saveDir.mkdirs();
    }
    File file = compressionVideo("http://xxxx.mp4");
    System.out.println(file.getName());
    }
  • 相关阅读:
    Java输出文件到本地(输出流)
    Java 工厂设计模式
    实际工作与JAVA面试题
    JAVA 转义字符串中的特殊字符
    Oracle工作笔记
    JS验证表单中TEXT文本框中是否含有非法字符
    JAVA 解析TXT文本
    表单异步提交数据
    rem.js(2)
    rem.js(1)
  • 原文地址:https://www.cnblogs.com/laotan/p/12767843.html
Copyright © 2011-2022 走看看