feat: Use ffmpmeg to convert webm to mp3 (support mp3 headers)

android/build.gradle

@@ -1,5 +1,6 @@
 buildscript {
     ext.kotlin_version = '1.3.50'
+    ext.flutterFFmpegPackage = 'audio-lts'
     repositories {
         google()
         jcenter()

lib/provider/audio_helper.dart

@@ -1,6 +1,12 @@
+import 'dart:io';
+import 'dart:math';
 
+import 'package:audiotagger/audiotagger.dart';
 import 'package:flutter/animation.dart';
+import 'package:flutter_ffmpeg/flutter_ffmpeg.dart';
 import 'package:flutter/material.dart';
+import 'package:http/http.dart' as http;
+import 'package:path_provider/path_provider.dart';
 
 AnimationController playFABController;
 
@@ -28,7 +34,6 @@ String formatDuration(Duration d) {
   return format;
 }
 
-
 bool isValidYouTubeURL(String url) {
   url =
       url.replaceAll('://m.y', '://www.y'); //For changing mobile URL to web URL
@@ -41,3 +46,35 @@ bool isValidYouTubeURL(String url) {
   else
     return true;
 }
+
+Future<File> urlToFile(String imageUrl) async {
+  //https://mrgulshanyadav.medium.com/convert-image-url-to-file-format-in-flutter-10421bccfd18
+  var random = new Random();
+  Directory tempDir = await getTemporaryDirectory();
+  String tempPath = tempDir.path;
+  File file = new File('$tempPath' + (random.nextInt(100)).toString() + '.png');
+  http.Response response = await http.get(Uri.parse(imageUrl));
+  await file.writeAsBytes(response.bodyBytes);
+  return file;
+}
+
+Future<String> webmToMP3(String path) async {
+  final FlutterFFmpeg _flutterFFmpeg = new FlutterFFmpeg();
+  int result = 0;
+  final newPath = path.replaceAll('.webm', '_RaagApp.mp3');
+  var command = "-i \"$path\" -vn -ab 128k -ar 44100 -y \"$newPath\"";
+  await _flutterFFmpeg.execute(command).then((rc) {
+    print('FFmpeg Result: $rc');
+    result = rc;
+  });
+  await File(path).delete();
+  return newPath;
+}
+
+Future<bool> tagArtWork(String url, String path) async {
+  var tagger = new Audiotagger();
+  File albumArtFile = await urlToFile(url);
+  final result = await tagger.writeTag(
+      path: path, tagField: "artist", value: 'Artist');
+  return result;
+}

lib/view/download_music.dart

@@ -137,7 +137,7 @@ class _DownloadMusicState extends State<DownloadMusic> {
           .replaceAll('/', ' ')
           .replaceAll(':', ' ');
       //TODO Do something efficient to choose only alpha-numeric characters from $title
-      var filePath = _raagDownloadsDirectory.path + '/' + tempTitle + '.mp3';
+      var filePath = _raagDownloadsDirectory.path + '/' + tempTitle + '.webm';
 
       if (streamInfo != null) {
         var stream = yt.videos.streamsClient.get(streamInfo);
@@ -156,6 +156,12 @@ class _DownloadMusicState extends State<DownloadMusic> {
           return s;
         }).pipe(fileSink);
 
+        setTitle('Converting to MP3');
+        filePath = await webmToMP3(filePath);
+
+        setTitle('Adding tags');
+        print(await tagArtWork(video.thumbnails.mediumResUrl, filePath));
+
         setTitle(downloadComplete);
         setBody(
             '$fileLocation: $filePath\n$fileSize: ${(streamInfo.size.totalMegaBytes.toString().substring(0, 4))} MB');

pubspec.lock

@@ -43,6 +43,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.7.1"
+  audiotagger:
+    dependency: "direct main"
+    description:
+      name: audiotagger
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -113,20 +120,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.6"
-  convert:
-    dependency: transitive
-    description:
-      name: convert
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.1"
   csslib:
     dependency: transitive
     description:
       name: csslib
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.16.2"
+    version: "0.17.0"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -147,7 +147,7 @@ packages:
       name: equatable
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.6"
+    version: "2.0.0"
   fading_edge_scrollview:
     dependency: transitive
     description:
@@ -188,6 +188,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.3.5+6"
+  flutter_ffmpeg:
+    dependency: "direct main"
+    description:
+      name: flutter_ffmpeg
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.4.0"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
@@ -218,21 +225,21 @@ packages:
       name: html
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.14.0+4"
+    version: "0.15.0"
   http:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.2"
+    version: "0.13.3"
   http_parser:
     dependency: transitive
     description:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.4"
+    version: "4.0.0"
   js:
     dependency: transitive
     description:
@@ -246,7 +253,7 @@ packages:
       name: json_annotation
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.1"
+    version: "4.0.1"
   marquee:
     dependency: "direct main"
     description:
@@ -337,7 +344,7 @@ packages:
       name: petitparser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.0"
+    version: "4.1.0"
   platform:
     dependency: transitive
     description:
@@ -538,14 +545,14 @@ packages:
       name: xml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.5.1"
+    version: "5.1.0"
   youtube_explode_dart:
     dependency: "direct main"
     description:
       name: youtube_explode_dart
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.9.3+2"
 sdks:
   dart: ">=2.12.0 <3.0.0"
   flutter: ">=1.24.0-10"

pubspec.yaml

@@ -26,11 +26,14 @@ dependencies:
   audio_manager: ^0.5.5+3
   audioplayer: 0.8.1
   audioplayer_web: 0.7.1
+  audiotagger: ^2.2.0
   clipboard: ^0.1.2+8
   connectivity: ^2.0.2
   downloads_path_provider_28: ^0.1.0
   flutter_audio_query: ^0.3.5+6
+  flutter_ffmpeg: ^0.4.0
   fluttertoast: ^7.1.1
+  http: ^0.13.3
   marquee: ^1.6.1
   open_file: ^3.2.0
   path_provider: ^2.0.0-nullsafety.1