JAVAE2项目如何实现对视频格式进行转换

 ws.schild
 jave-all-deps
 2.4.2

package com.example.javae2.util;


import cn.hutool.core.util.ObjectUtil;
import ws.schild.jave.*;

import java.io.File;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;

public class VideoUtils {



 private static Map sizeBitRateMap;

 static {
  sizeBitRateMap = new HashMap<>();
  sizeBitRateMap.put("1920*1080", 4992);
  sizeBitRateMap.put("1280*720", 2496);
  sizeBitRateMap.put("1024*576", 1856);
  sizeBitRateMap.put("840*480", 1216);
  sizeBitRateMap.put("768*432", 1088);
  sizeBitRateMap.put("640*360", 896);
  sizeBitRateMap.put("424*240", 576);
 }


 public static void main(String[] args) {
  VideoUtils videoUtils = new VideoUtils();
  videoUtils.convertVideoToMP4(new File("C:\\temp\\javae2\\0001.哔哩哔哩-颈椎操[流畅版].flv"),"C:\\temp\\javae2\\0001.哔哩哔哩-颈椎操[流畅版].mp4");

  //videoUtils.getVideoInfoAndGenerateThumbnail(new File("C:\\\\temp\\\\javae2\\\\0001.哔哩哔哩-颈椎操[流畅版].mp4"), "C:\\\\temp\\\\javae2\\\\0001.哔哩哔哩-颈椎操[流畅版]..jpg");


 }

 /**
  * 截取视频的一针作为封面图
  *
  * @param file   视频文件
  * @param thumbnailPath 截取图片保存路径
  * @return
  */
 public void getVideoInfoAndGenerateThumbnail(File file, String thumbnailPath) {
  MultimediaObject multimediaObject = new MultimediaObject(file);
  try {
   MultimediaInfo info = multimediaObject.getInfo();
   VideoInfo videoInfo = info.getVideo();
   logger.info("获取视频时长：{}", info.getDuration() / 1000);
   if (ObjectUtil.isNotNull(videoInfo)) {
    VideoSize size = videoInfo.getSize();
    int width = size.getWidth();
    int height = size.getHeight();
    logger.info("视频宽：{} 视频高{}", width, height);
    logger.info("比特率：{}", videoInfo.getBitRate() / 1000);
    ScreenExtractor screenExtractor = new ScreenExtractor();
    File target = new File(thumbnailPath);
    //截取视频作为图片保存
    /*
    *第一个参数 视频源文件信息类
    * 第二个参数 截取的宽度
    * 第三个参数 截取的高度
    * 第四个参数 截取的是那一帧
    * 第五个参数是 截取的图片质量 1-31 数字越小质量越高
    *
    **/
    screenExtractor.renderOneImage(multimediaObject, size.getWidth(), size.getHeight(), 3000, target, 31);

   }
  } catch (EncoderException e) {
   e.printStackTrace();
  }

 }


 /**
  * @param source  源文件
  * @param targetPath 转码后的路径
  */
 public void convertVideoToMP4(File source, String targetPath) {
  MultimediaObject multimediaObject = new MultimediaObject(source);
  try {
   MultimediaInfo info = multimediaObject.getInfo();
   VideoInfo videoInfo = info.getVideo();
   VideoSize size = videoInfo.getSize();
   System.out.println("原视频宽：" + size.getWidth());
   System.out.println("原视频高：" + size.getHeight());
   System.out.println("原视频比特率：" + videoInfo.getBitRate() / 1000);
   System.out.println("原视频编码：" + videoInfo.getDecoder());

   Integer bitRate = sizeBitRateMap.get(size.getWidth() + "*" + size.getHeight());
   VideoAttributes video = new VideoAttributes();
   //设置视频编码
   video.setCodec("h364");

   if (ObjectUtil.isNotNull(bitRate)) {
    //设置比特率
    video.setBitRate(bitRate * 1000);
   }
   File target = new File(targetPath);
   AudioAttributes audio = new AudioAttributes();
   //设置编码器名称
   audio.setCodec("aac");
   EncodingAttributes attrs = new EncodingAttributes();
   //设置转换后的格式
   attrs.setFormat("mp4");
   attrs.setAudioAttributes(audio);
   attrs.setVideoAttributes(video);
   Encoder encoder = new Encoder();
   encoder.encode(multimediaObject, target, attrs);
   //花费毫秒数

   MultimediaObject multimediaObjectOfter = new MultimediaObject(Paths.get(targetPath).toFile());
   MultimediaInfo info1 = multimediaObjectOfter.getInfo();
   VideoInfo video1 = info1.getVideo();
   VideoSize size1 = video1.getSize();

   System.out.println("转换后视频宽：" + size1.getWidth());
   System.out.println("转换后视频高：" + size1.getHeight());
   System.out.println("转换后视频比特率：" + video1.getBitRate() / 1000);
   System.out.println("转换后视频编码：" + video1.getDecoder());

  } catch (EncoderException e) {
   e.printStackTrace();
  }
 }



}