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电脑需安装 ffmpeg 下载地址

FFmpeg

核心代码如下，文末包含示例项目

package com.ruoyi.common.utils.mp3;

import com.ruoyi.framework.config.RuoYiConfig;

public class Mp3Utils {
    /**
     * ffmpeg执行路径
     */
    private static String ffmpegExePath = "E:\\soft\\development\\windows\\ffmpeg-5.1.2-full_build\\ffmpeg-5.1.2-full_build\\bin\\ffmpeg.exe";

    public static void main(String[] args) {
        String start = "00:00:08.551";
        String end = "00:01:04.023";
        String input = "D:\\FFOutput\\2023-01-11\\2023-01-11.aac";
        String out = "D:\\FFOutput\\2023-01-11\\out.aac";
        mp3Cut(start, end, input, out);

//        String video = "C:\\Users\\Lenovo\\Downloads\\Video\\2023-01-11.ts";
//        videoToMp3(video);
    }

    /**
     * 切割mp3 文件
     * @param start
     * @param end
     * @param input
     * @param out
     */
    public static void mp3Cut(String start, String end, String input, String out) {
        //E:\ffmpeg\bin\ffmpeg.exe -i E:/tlb/365.mp3 -ss 00:00:08.551 -to 00:01:04.023 -y E:/tlb/365/5.mp3
        String cmd = ffmpegExePath + " -i " + input + " -ss " + start + " -to " + end + " -y " + out;

        try {
            Runtime runtime = Runtime.getRuntime();
            Process exec = runtime.exec(cmd);
            exec.waitFor();
            exec.destroy();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * 将秒表示时长转为00:01:02.500格式，精确到毫秒
     *
     * @param time 秒数时长
     * @return 字符串格式时长
     */
    public static String parseTimeToString(String time) {
        String[] times = time.split("\\.");
        Integer second = Integer.valueOf(times[0]);
        String nx = "000";
        if (times.length > 1) {
            nx = times[1];
            int length = nx.length();
            if (length < 3) {
                nx += "0";
            } else if (length > 3) {
                nx = nx.substring(0, 3);
            }
        }
        return secondToTime(second) + "." + nx;
    }
    //整数秒转换,精确到秒
    private static String secondToTime(int seconds) {
        if (seconds < 0) {
            throw new IllegalArgumentException("Seconds must be a positive number!");
        } else {
            int hour = seconds / 3600;
            int other = seconds % 3600;
            int minute = other / 60;
            int second = other % 60;
            StringBuilder sb = new StringBuilder();
            if (hour < 10) {
                sb.append("0");
            }

            sb.append(hour);
            sb.append(":");
            if (minute < 10) {
                sb.append("0");
            }

            sb.append(minute);
            sb.append(":");
            if (second < 10) {
                sb.append("0");
            }

            sb.append(second);
            return sb.toString();
        }
    }
    /**
     * 切割mp3 文件
     * @param video
     */
    public static void videoToMp3(String video) {
        int i = video.lastIndexOf(".");
        String out = video.substring(0,i);
        out = out+ ".mp3";
        System.out.println(out);
        String cmd = ffmpegExePath + " -i "+video+" -threads 10 -preset ultrafast  -f mp3 "+out+"　";

        try {
            Runtime runtime = Runtime.getRuntime();
            Process exec = runtime.exec(cmd);
            exec.waitFor();
            exec.destroy();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static String getAbsPath(String path){
        path =  RuoYiConfig.getProfile() + path.replace("/profile","");
        return path;
    }

}

示例项目仓库地址：

https://gitee.com/weifuqiang/ffmpeg-test/tree/master