How to extract audio from video using ffmpeg-kit with flutter

Question

just extract audio from video

@override
  void initState() {
    // TODO: implement initState
    super.initState();
    getAudio();
  }

  getAudio() async {
    await FFmpegKit.execute(
            "ffmpeg -i D:/Dart and Flutter/Projects/Jmm/firebase_task/assets/videos/flutter.mp4 -q:a 0 -map a D:/Dart and Flutter/Projects/Jmm/firebase_task/assets/videos/flutter_audio.mp3")
        .then((value) async {
      var returnCode = await value.getReturnCode();
      if (ReturnCode.isSuccess(returnCode)) {
        print('succsses');
      } else {
        print('fail');
      }
    });
  }

I have no idea the how to extract an audio from video in flutter

Since you can just pass the command line to it (as the very first tutorial shows you), you can just do it like everybody else: — nvoigt, Feb 07 '23 at 07:21
Does this answer your question? [How can I extract audio from video with ffmpeg?](https://stackoverflow.com/questions/9913032/how-can-i-extract-audio-from-video-with-ffmpeg) — nvoigt, Feb 07 '23 at 07:21
Drop the "ffmpeg" at the start, it knows it's ffmpeg. And your paths probable need to be in quotes, since they contain spaces. Can your application access your "D:\" paths? — nvoigt, Feb 07 '23 at 10:47
I drop the "ffmpeg" and surround the path with quotes and change the path to project assets folder. But the result is same — Aqib Khan, Feb 07 '23 at 10:56
What exactly *is* the result? For example, what is `returnCode`? And what is your latest code? — nvoigt, Feb 07 '23 at 12:20

score 1 · Answer 1 · answered Feb 07 '23 at 07:42

1

As per the documentation of the mentioned plugin, you can extract audio by the following way.

import 'package:ffmpeg_kit_flutter/ffmpeg_kit.dart';

 FFmpegKit.execute('-i input.mp4 -q:a 0 -map a output.mp3').then((session) async {
   final returnCode = await session.getReturnCode();

   if (ReturnCode.isSuccess(returnCode)) {

     // SUCCESS

   } else if (ReturnCode.isCancel(returnCode)) {

     // CANCEL

   } else {

     // ERROR

   }
 });

or even you can do it with more simple command (in execute) like:

-i input.mp4 output.mp3

or whatever FFmpeg command you want to execute.

answered Feb 07 '23 at 07:42

Tahir

170
10

Tahir i added code snippet, please look at that – Aqib Khan Feb 07 '23 at 10:40
seems your execution command and path have issues. Please remove the ffmpeg keyword as well. make a plain directory with single word name like "videosFolder" into your D drive and check again. – Tahir Feb 07 '23 at 10:55

score 1 · Accepted Answer · answered Feb 11 '23 at 09:28

ByteData _video = await rootBundle.load('assets/videos/flutter.mp4');
    var path = await getApplicationDocumentsDirectory();
    var sampleVideo = "${path.path}/sample_video.mp4";
    File _avFile = await File(sampleVideo).create();
    await _avFile.writeAsBytes(_video.buffer.asUint8List());
    var sampleAudio = "${path.path}/sample_audio.mp3";
    File audioFile = await _avFile.copy(sampleAudio);

I solve my problem with the above code snippet

How to extract audio from video using ffmpeg-kit with flutter

2 Answers2