有没有一种方法可以在flutter中快进快退音频？

dependencies:
  flutter_ffmpeg: ^0.4.0

import 'package:flutter_ffmpeg/flutter_ffmpeg.dart';

FlutterFFmpeg flutterFFmpeg = FlutterFFmpeg();

// 快进音频
void fastForwardAudio(String inputPath, String outputPath, double duration) async {
  String command = "-i $inputPath -filter:a \"atempo=$duration\" $outputPath";
  int result = await flutterFFmpeg.execute(command);
  if (result == 0) {
    print("音频快进成功");
  } else {
    print("音频快进失败");
  }
}

// 快退音频
void rewindAudio(String inputPath, String outputPath, double duration) async {
  String command = "-i $inputPath -filter:a \"atempo=1/$duration\" $outputPath";
  int result = await flutterFFmpeg.execute(command);
  if (result == 0) {
    print("音频快退成功");
  } else {
    print("音频快退失败");
  }
}