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 {
            // 構(gòu)造FFmpeg命令
            String ffmpegCommand = "ffmpeg -i " + inputFilePath + " " + outputFilePath;

            // 執(zhí)行FFmpeg命令
            Process process = Runtime.getRuntime().exec(ffmpegCommand);

            // 獲取輸出流和錯誤流
            BufferedReader inputStreamReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            BufferedReader errorStreamReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));

            String line;

            // 輸出標準輸出流
            while ((line = inputStreamReader.readLine()) != null) {
                System.out.println(line);
            }

            // 輸出錯誤輸出流
            while ((line = errorStreamReader.readLine()) != null) {
                System.out.println(line);
            }

            // 等待命令執(zhí)行完成
            process.waitFor();

            // 關(guān)閉流
            inputStreamReader.close();
            errorStreamReader.close();

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