将视频转换为音频 - ffmpeg

Question

我正在尝试在基于 flutter 的应用程序中使用 ffmpeg 将视频转换为音频，但命令不起作用。

命令有问题吗？

  void convert(File pickedVideo) async {
    Directory applicationDocDirectory = await getApplicationDocumentsDirectory();

    final outputPath = '${applicationDocDirectory.path}/output-audio-${const Uuid().v1()}.mp3';

    final session = await FFmpegKit.execute('-i ${pickedVideo.path} -vn -acodec mp3 $outputPath');

    final returnCode = await session.getReturnCode();

    print(ReturnCode.isSuccess(returnCode)); // return false
  }

Answer 1

您可以尝试拆分会话参数。

final session = await FFmpegKit.execute(['-i', pickedVideo.path, '-vn', '-acodec', 'mp3', outputPath]);

你的代码看起来像这样

void convert(File pickedVideo) async {
 Directory applicationDocDirectory = await getApplicationDocumentsDirectory();

 final outputPath = '${applicationDocDirectory.path}/output-audio-${const Uuid().v1()}.mp3';

 final session = await FFmpegKit.execute(['-i', pickedVideo.path, '-vn', '-acodec', 'mp3', outputPath]);

 final returnCode = await session.getReturnCode();

 print(ReturnCode.isSuccess(returnCode)); // return false
}