1、依靠ffmpeg 命令

package zimu;

import java.io.IOException;


public class TestSrt {

    public static void main(String[] args) {
        String videoFile = "/test/test1.mp4";
        String subtitleFile = "/test/test1.SRT";
        String outputFile = "/test/testout13.mp4";

        try {
            // 使用FFmpeg命令行生成视频字幕
            String command = "D:\\test\\ffmpeg.exe -i " + videoFile + " -filter_complex \"subtitles=" + subtitleFile + "\" -c:a copy " + outputFile;
            System.out.println(command);
            Runtime.getRuntime().exec(command);
            System.out.println("视频字幕生成完成");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

2、SRT 文件格式：

参考链接： https://blog.csdn.net/liuyaokai1990/article/details/110417483?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-0-110417483-blog-109305411.235^v38^pc_relevant_sort_base3&spm=1001.2101.3001.4242.1&utm_relevant_index=3