java ffmpeg格式轉換

package com.example.demo.util;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

/**
 * ffmpeg格式轉換
 */
public class ConvertVideoUtil {
    private static String inputPath = "";
    private static String outputPath = "";

    /**
     * ffmpeg安裝所在目錄的bin目錄,如果是linux同理
     */
    private static String ffmpegPath = "";

    public static void main(String[] args) {
        getPath();
        if (!checkfile(inputPath)) {
            System.out.println(inputPath + " is not file");
            return;
        }
        if (process()) {
            System.out.println("ok");
        }
    }

    public static void getPath() {
        // 先獲取當前項目路徑，在獲得源文件、目標文件、轉換器的路徑
        File diretory = new File("");
        try {
            String currPath = diretory.getAbsolutePath();
            inputPath = "D:\\ffmpeg\\Apple Watch~2.mp4";
            outputPath = "D:\\ffmpeg\\oss\\";
            ffmpegPath = "D:\\dev_tools\\ffmpeg\\ffmpeg-4.2.1-win64-static\\bin\\";
            System.out.println(currPath);
        } catch (Exception e) {
            System.out.println("getPath出錯");
        }
    }

    public static boolean process() {
        int type = checkContentType();
        boolean status = false;
        //System.out.println("直接轉成mp4格式");
        //status = processMp4(inputPath);// 直接轉成mp4格式
        //processAVI(type);
        status = processTs(inputPath);// 直接轉成mp4格式
        return status;
    }

    private static int checkContentType() {
        String type = inputPath.substring(inputPath.lastIndexOf(".") + 1, inputPath.length()).toLowerCase();
        // ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）
        if (type.equals("avi")) {
            return 0;
        } else if (type.equals("mpg")) {
            return 0;
        } else if (type.equals("wmv")) {
            return 0;
        } else if (type.equals("3gp")) {
            return 0;
        } else if (type.equals("mov")) {
            return 0;
        } else if (type.equals("mp4")) {
            return 0;
        } else if (type.equals("asf")) {
            return 0;
        } else if (type.equals("asx")) {
            return 0;
        } else if (type.equals("flv")) {
            return 0;
        }
        // 對ffmpeg無法解析的文件格式(wmv9，rm，rmvb等),
        // 可以先用別的工具（mencoder）轉換爲avi(ffmpeg能解析的)格式.
        else if (type.equals("wmv9")) {
            return 1;
        } else if (type.equals("rm")) {
            return 1;
        } else if (type.equals("rmvb")) {
            return 1;
        }
        return 9;
    }

    private static boolean checkfile(String path) {
        File file = new File(path);
        if (!file.isFile()) {
            return false;
        }
        return true;
    }

    /**
     * 對ffmpeg無法解析的文件格式(wmv9，rm，rmvb等), 可以先用別的工具（mencoder）轉換爲avi(ffmpeg能解析的)格式.
     * @param type
     * @return
     */
    private static String processAVI(int type) {
        List<String> commend = new ArrayList<String>();
        commend.add(ffmpegPath + "mencoder");
        commend.add(inputPath);
        commend.add("-oac");
        commend.add("lavc");
        commend.add("-lavcopts");
        commend.add("acodec=mp3:abitrate=64");
        commend.add("-ovc");
        commend.add("xvid");
        commend.add("-xvidencopts");
        commend.add("bitrate=600");
        commend.add("-of");
        commend.add("mp4");
        commend.add("-o");
        commend.add(outputPath + "a.AVI");
        try {
            ProcessBuilder builder = new ProcessBuilder();
            Process process = builder.command(commend).redirectErrorStream(true).start();
            new PrintStream(process.getInputStream());
            new PrintStream(process.getErrorStream());
            process.waitFor();
            return outputPath + "a.AVI";
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    private static boolean executeCommand(List<String> commond){
        try {
            Process videoProcess = new ProcessBuilder(commond).redirectErrorStream(true).start();
            new PrintStream(videoProcess.getErrorStream()).start();
            new PrintStream(videoProcess.getInputStream()).start();
            videoProcess.waitFor();
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * 轉換成TS格式
     * @param oldfilepath
     * @return
     */
    private static boolean processTs(String oldfilepath) {
        if (!checkfile(inputPath)) {
            System.out.println(oldfilepath + " is not file");
            return false;
        }
        List<String> command = new ArrayList<String>();
        command.add(ffmpegPath + "ffmpeg");
        command.add("-i");command.add(oldfilepath);
        command.add("-pix_fmt");command.add("yuv420p");
        command.add("-vcodec");command.add("h264");
        command.add("-b:v");command.add("1575k");//比特率，越高越清晰
        command.add("-preset");command.add("5");//-preset，一般是5
        command.add("-crf");command.add("18");//-crf 18——28是一個合理的範圍。18被認爲是視覺無損的
        //command.add("-vf");command.add("scale=iw/2:ih/2");//長和高默認爲原來的2分之一
        command.add("-s");command.add("640x480");//分辨率
//      command.add("-codec");command.add("copy");
        command.add(outputPath + "Apple Watch~.480p-4.ts");
        return executeCommand(command);
    }

    /**
     * 轉換成FLV格式
     * @param oldfilepath
     * @return
     */
    private static boolean processFlv(String oldfilepath) {

        if (!checkfile(inputPath)) {
            System.out.println(oldfilepath + " is not file");
            return false;
        }
        List<String> command = new ArrayList<String>();
        command.add(ffmpegPath + "ffmpeg");
        command.add("-i");
        command.add(oldfilepath);
        command.add("-ab");
        command.add("56");
        command.add("-ar");
        command.add("22050");
        command.add("-qscale");
        command.add("8");
        command.add("-r");
        command.add("15");
        command.add("-s");
        command.add("640x480");
        command.add(outputPath + "a.flv");
        return executeCommand(command);
    }


    /**
     * 轉換成MP4格式
     * @param oldfilepath
     * @return
     */
    private static boolean processMp4(String oldfilepath) {
        if (!checkfile(inputPath)) {
            System.out.println(oldfilepath + " is not file");
            return false;
        }
        List<String> command = new ArrayList<String>();
        command.add(ffmpegPath + "ffmpeg");
        command.add("-i");
        command.add(oldfilepath);
        command.add("-c:v");
        command.add("libx264");
        command.add("-mbd");
        command.add("0");
        command.add("-c:a");
        command.add("aac");
        command.add("-strict");
        command.add("-2");
        command.add("-pix_fmt");
        command.add("yuv420p");
        command.add("-movflags");
        command.add("faststart");
        command.add(outputPath + "a.mp4");
        return executeCommand(command);
    }

    static class PrintStream extends Thread {
        java.io.InputStream __is = null;
        public PrintStream(java.io.InputStream is)
        {
            __is = is;
        }

        @Override
        public void run() {
            try {
                while(this != null){
                    int _ch = __is.read();
                    if(_ch != -1) {
                        System.out.print((char) _ch);
                    }else{ break;}
                }
            }catch (Exception e){
                e.printStackTrace();
            }
        }
    }
}