java使用ffmpeg命令来实现视频编码转换的示例

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class FFmpegVideoConverter {

    public static void main(String[] args) {
        String inputFilePath = "input.mp4";
        String outputFilePath = "output.avi";

        convertVideo(inputFilePath, outputFilePath);
    }

    public static void convertVideo(String inputFilePath, String outputFilePath) {
        try {
            // 构造FFmpeg命令
            String ffmpegCommand = "ffmpeg -i " + inputFilePath + " " + outputFilePath;

            // 执行FFmpeg命令
            Process process = Runtime.getRuntime().exec(ffmpegCommand);

            // 获取输出流和错误流
            BufferedReader inputStreamReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            BufferedReader errorStreamReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));

            String line;

            // 输出标准输出流
            while ((line = inputStreamReader.readLine()) != null) {
                System.out.println(line);
            }

            // 输出错误输出流
            while ((line = errorStreamReader.readLine()) != null) {
                System.out.println(line);
            }

            // 等待命令执行完成
            process.waitFor();

            // 关闭流
            inputStreamReader.close();
            errorStreamReader.close();

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