diff --git a/example/.flutter-plugins-dependencies b/example/.flutter-plugins-dependencies
new file mode 100644
index 0000000..e032aeb
--- /dev/null
+++ b/example/.flutter-plugins-dependencies
@@ -0,0 +1 @@
+{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"flutter_video_compress","path":"/Users/develappsdeveloper/development/felipe/migrations/flutter_video_compress/","dependencies":[]},{"name":"image_picker","path":"/Users/develappsdeveloper/development/flutter/.pub-cache/hosted/pub.dartlang.org/image_picker-0.8.4+4/","dependencies":[]},{"name":"video_player","path":"/Users/develappsdeveloper/development/flutter/.pub-cache/hosted/pub.dartlang.org/video_player-2.2.6/","dependencies":[]}],"android":[{"name":"flutter_plugin_android_lifecycle","path":"/Users/develappsdeveloper/development/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_plugin_android_lifecycle-2.0.4/","dependencies":[]},{"name":"flutter_video_compress","path":"/Users/develappsdeveloper/development/felipe/migrations/flutter_video_compress/","dependencies":[]},{"name":"image_picker","path":"/Users/develappsdeveloper/development/flutter/.pub-cache/hosted/pub.dartlang.org/image_picker-0.8.4+4/","dependencies":["flutter_plugin_android_lifecycle"]},{"name":"video_player","path":"/Users/develappsdeveloper/development/flutter/.pub-cache/hosted/pub.dartlang.org/video_player-2.2.6/","dependencies":[]}],"macos":[],"linux":[],"windows":[],"web":[{"name":"image_picker_for_web","path":"/Users/develappsdeveloper/development/flutter/.pub-cache/hosted/pub.dartlang.org/image_picker_for_web-2.1.4/","dependencies":[]},{"name":"video_player_web","path":"/Users/develappsdeveloper/development/flutter/.pub-cache/hosted/pub.dartlang.org/video_player_web-2.0.4/","dependencies":[]}]},"dependencyGraph":[{"name":"flutter_plugin_android_lifecycle","dependencies":[]},{"name":"flutter_video_compress","dependencies":[]},{"name":"image_picker","dependencies":["flutter_plugin_android_lifecycle","image_picker_for_web"]},{"name":"image_picker_for_web","dependencies":[]},{"name":"video_player","dependencies":["video_player_web"]},{"name":"video_player_web","dependencies":[]}],"date_created":"2021-11-06 13:03:33.632315","version":"2.5.3"}
\ No newline at end of file
diff --git a/example/ios/Flutter/flutter_export_environment.sh b/example/ios/Flutter/flutter_export_environment.sh
new file mode 100755
index 0000000..42a8d6b
--- /dev/null
+++ b/example/ios/Flutter/flutter_export_environment.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+# This is a generated file; do not edit or check into version control.
+export "FLUTTER_ROOT=/Users/develappsdeveloper/development/flutter"
+export "FLUTTER_APPLICATION_PATH=/Users/develappsdeveloper/development/felipe/migrations/flutter_video_compress/example"
+export "COCOAPODS_PARALLEL_CODE_SIGN=true"
+export "FLUTTER_TARGET=lib/main.dart"
+export "FLUTTER_BUILD_DIR=build"
+export "FLUTTER_BUILD_NAME=1.0.0"
+export "FLUTTER_BUILD_NUMBER=1"
+export "DART_OBFUSCATION=false"
+export "TRACK_WIDGET_CREATION=false"
+export "TREE_SHAKE_ICONS=false"
+export "PACKAGE_CONFIG=.packages"
diff --git a/example/lib/main.dart b/example/lib/main.dart
index fecea4f..2af4bdc 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -12,7 +12,7 @@ void main() => runApp(MyApp(title: 'Flutter Video Compress Example'));
 class MyApp extends StatefulWidget {
   MyApp({this.title});
 
-  final String title;
+  final String? title;
 
   @override
   _MyAppState createState() => _MyAppState();
@@ -20,14 +20,14 @@ class MyApp extends StatefulWidget {
 
 class _MyAppState extends State<MyApp> {
   final _flutterVideoCompress = FlutterVideoCompress();
-  Subscription _subscription;
+  Subscription? _subscription;
 
-  Image _thumbnailFileImage;
-  Image _gifFileImage;
+  Image? _thumbnailFileImage;
+  Image? _gifFileImage;
 
   MediaInfo _originalVideoInfo = MediaInfo(path: '');
   MediaInfo _compressedVideoInfo = MediaInfo(path: '');
-  String _taskName;
+  String? _taskName;
   double _progressState = 0;
 
   final _loadingStreamCtrl = StreamController<bool>.broadcast();
@@ -46,7 +46,7 @@ class _MyAppState extends State<MyApp> {
   @override
   void dispose() {
     super.dispose();
-    _subscription.unsubscribe();
+    _subscription?.unsubscribe();
     _loadingStreamCtrl.close();
   }
 
@@ -95,11 +95,11 @@ class _MyAppState extends State<MyApp> {
 
   Widget _buildMaterialWarp(Widget body) {
     return MaterialApp(
-      title: widget.title,
+      title: widget.title ?? "",
       theme: myTheme,
       home: Scaffold(
           appBar: AppBar(
-            title: Text(widget.title),
+            title: Text(widget.title ?? ""),
             actions: <Widget>[
               IconButton(
                 onPressed: () async {
@@ -121,9 +121,9 @@ class _MyAppState extends State<MyApp> {
         child: Text(text, style: TextStyle(color: Colors.white)),
         color: Colors.grey[800],
         onPressed: () async {
-          final videoFile = await ImagePicker.pickVideo(source: source);
+          final videoFile = await ImagePicker().pickVideo(source: source);
           if (videoFile != null) {
-            runFlutterVideoCompressMethods(videoFile);
+            runFlutterVideoCompressMethods(videoFile as File);
           }
         },
       ),
@@ -141,7 +141,7 @@ class _MyAppState extends State<MyApp> {
   }
 
   List<Widget> _buildInfoPanel(String title,
-      {MediaInfo info, Image image, bool isVideoModel = false}) {
+      {MediaInfo? info, Image? image, bool isVideoModel = false}) {
     if (info?.file == null && image == null && !isVideoModel) return [];
     return [
       if (!isVideoModel || info?.file != null)
@@ -154,10 +154,10 @@ class _MyAppState extends State<MyApp> {
       if (info?.file != null)
         Padding(
           padding: const EdgeInsets.all(8),
-          child: Text(_infoConvert(info)),
+          child: Text(_infoConvert(info!)),
         ),
       if (image != null) image,
-      if (isVideoModel && info?.file != null) VideoPlayerView(file: info.file)
+      if (isVideoModel && info?.file != null) VideoPlayerView(file: info!.file!)
     ];
   }
 
@@ -253,24 +253,26 @@ class _MyAppState extends State<MyApp> {
 class VideoPlayerView extends StatefulWidget {
   VideoPlayerView({this.file});
 
-  final File file;
+  final File? file;
 
   @override
   _VideoPlayerViewState createState() => _VideoPlayerViewState();
 }
 
 class _VideoPlayerViewState extends State<VideoPlayerView> {
-  VideoPlayerController _controller;
+  late VideoPlayerController _controller;
 
   @override
   void initState() {
     super.initState();
-    _controller = VideoPlayerController.file(widget.file)
-      ..initialize().then((_) {
-        setState(() {});
-      })
-      ..setVolume(1)
-      ..play();
+    if (widget.file != null) {
+      _controller = VideoPlayerController.file(widget.file!)
+        ..initialize().then((_) {
+          setState(() {});
+        })
+        ..setVolume(1)
+        ..play();
+    }
   }
 
   @override
@@ -297,7 +299,7 @@ class _VideoPlayerViewState extends State<VideoPlayerView> {
             Stack(
               alignment: Alignment.center,
               children: <Widget>[
-                _controller.value.initialized
+                _controller.value.isInitialized
                     ? AspectRatio(
                         aspectRatio: _controller.value.aspectRatio,
                         child: VideoPlayer(_controller),
diff --git a/example/lib/my-theme.dart b/example/lib/my-theme.dart
index ab3d92c..5147258 100644
--- a/example/lib/my-theme.dart
+++ b/example/lib/my-theme.dart
@@ -81,55 +81,55 @@ final ThemeData myTheme = ThemeData(
     ),
   ),
   textTheme: TextTheme(
-    display4: TextStyle(
+    headline1: TextStyle(
       color: Color(0xb3ffffff),
       fontSize: 96.0,
       fontWeight: FontWeight.w300,
       fontStyle: FontStyle.normal,
     ),
-    display3: TextStyle(
+    headline2: TextStyle(
       color: Color(0xb3ffffff),
       fontSize: 60.0,
       fontWeight: FontWeight.w300,
       fontStyle: FontStyle.normal,
     ),
-    display2: TextStyle(
+    headline3: TextStyle(
       color: Color(0xb3ffffff),
       fontSize: 48.0,
       fontWeight: FontWeight.w400,
       fontStyle: FontStyle.normal,
     ),
-    display1: TextStyle(
+    headline4: TextStyle(
       color: Color(0xb3ffffff),
       fontSize: 34.0,
       fontWeight: FontWeight.w400,
       fontStyle: FontStyle.normal,
     ),
-    headline: TextStyle(
+    headline5: TextStyle(
       color: Color(0xffffffff),
       fontSize: 24.0,
       fontWeight: FontWeight.w400,
       fontStyle: FontStyle.normal,
     ),
-    title: TextStyle(
+    headline6: TextStyle(
       color: Color(0xffffffff),
       fontSize: 20.0,
       fontWeight: FontWeight.w500,
       fontStyle: FontStyle.normal,
     ),
-    subhead: TextStyle(
+    subtitle1: TextStyle(
       color: Color(0xffffffff),
       fontSize: 16.0,
       fontWeight: FontWeight.w400,
       fontStyle: FontStyle.normal,
     ),
-    body2: TextStyle(
+    bodyText1: TextStyle(
       color: Color(0xffffffff),
       fontSize: 14.0,
       fontWeight: FontWeight.w400,
       fontStyle: FontStyle.normal,
     ),
-    body1: TextStyle(
+    bodyText2: TextStyle(
       color: Color(0xffffffff),
       fontSize: 16.0,
       fontWeight: FontWeight.w400,
@@ -147,7 +147,7 @@ final ThemeData myTheme = ThemeData(
       fontWeight: FontWeight.w500,
       fontStyle: FontStyle.normal,
     ),
-    subtitle: TextStyle(
+    subtitle2: TextStyle(
       color: Color(0xffffffff),
       fontSize: 14.0,
       fontWeight: FontWeight.w500,
@@ -161,55 +161,55 @@ final ThemeData myTheme = ThemeData(
     ),
   ),
   primaryTextTheme: TextTheme(
-    display4: TextStyle(
+    headline1: TextStyle(
       color: Color(0xb3ffffff),
       fontSize: 96.0,
       fontWeight: FontWeight.w300,
       fontStyle: FontStyle.normal,
     ),
-    display3: TextStyle(
+    headline2: TextStyle(
       color: Color(0xb3ffffff),
       fontSize: 60.0,
       fontWeight: FontWeight.w300,
       fontStyle: FontStyle.normal,
     ),
-    display2: TextStyle(
+    headline3: TextStyle(
       color: Color(0xb3ffffff),
       fontSize: 48.0,
       fontWeight: FontWeight.w400,
       fontStyle: FontStyle.normal,
     ),
-    display1: TextStyle(
+    headline4: TextStyle(
       color: Color(0xb3ffffff),
       fontSize: 34.0,
       fontWeight: FontWeight.w400,
       fontStyle: FontStyle.normal,
     ),
-    headline: TextStyle(
+    headline5: TextStyle(
       color: Color(0xffffffff),
       fontSize: 24.0,
       fontWeight: FontWeight.w400,
       fontStyle: FontStyle.normal,
     ),
-    title: TextStyle(
+    headline6: TextStyle(
       color: Color(0xffffffff),
       fontSize: 20.0,
       fontWeight: FontWeight.w500,
       fontStyle: FontStyle.normal,
     ),
-    subhead: TextStyle(
+    subtitle1: TextStyle(
       color: Color(0xffffffff),
       fontSize: 16.0,
       fontWeight: FontWeight.w400,
       fontStyle: FontStyle.normal,
     ),
-    body2: TextStyle(
+    bodyText1: TextStyle(
       color: Color(0xffffffff),
       fontSize: 14.0,
       fontWeight: FontWeight.w400,
       fontStyle: FontStyle.normal,
     ),
-    body1: TextStyle(
+    bodyText2: TextStyle(
       color: Color(0xffffffff),
       fontSize: 16.0,
       fontWeight: FontWeight.w400,
@@ -227,7 +227,7 @@ final ThemeData myTheme = ThemeData(
       fontWeight: FontWeight.w500,
       fontStyle: FontStyle.normal,
     ),
-    subtitle: TextStyle(
+    subtitle2: TextStyle(
       color: Color(0xffffffff),
       fontSize: 14.0,
       fontWeight: FontWeight.w500,
@@ -240,86 +240,6 @@ final ThemeData myTheme = ThemeData(
       fontStyle: FontStyle.normal,
     ),
   ),
-  accentTextTheme: TextTheme(
-    display4: TextStyle(
-      color: Color(0x8a000000),
-      fontSize: 96.0,
-      fontWeight: FontWeight.w300,
-      fontStyle: FontStyle.normal,
-    ),
-    display3: TextStyle(
-      color: Color(0x8a000000),
-      fontSize: 60.0,
-      fontWeight: FontWeight.w300,
-      fontStyle: FontStyle.normal,
-    ),
-    display2: TextStyle(
-      color: Color(0x8a000000),
-      fontSize: 48.0,
-      fontWeight: FontWeight.w400,
-      fontStyle: FontStyle.normal,
-    ),
-    display1: TextStyle(
-      color: Color(0x8a000000),
-      fontSize: 34.0,
-      fontWeight: FontWeight.w400,
-      fontStyle: FontStyle.normal,
-    ),
-    headline: TextStyle(
-      color: Color(0xdd000000),
-      fontSize: 24.0,
-      fontWeight: FontWeight.w400,
-      fontStyle: FontStyle.normal,
-    ),
-    title: TextStyle(
-      color: Color(0xdd000000),
-      fontSize: 20.0,
-      fontWeight: FontWeight.w500,
-      fontStyle: FontStyle.normal,
-    ),
-    subhead: TextStyle(
-      color: Color(0xdd000000),
-      fontSize: 16.0,
-      fontWeight: FontWeight.w400,
-      fontStyle: FontStyle.normal,
-    ),
-    body2: TextStyle(
-      color: Color(0xdd000000),
-      fontSize: 14.0,
-      fontWeight: FontWeight.w400,
-      fontStyle: FontStyle.normal,
-    ),
-    body1: TextStyle(
-      color: Color(0xdd000000),
-      fontSize: 16.0,
-      fontWeight: FontWeight.w400,
-      fontStyle: FontStyle.normal,
-    ),
-    caption: TextStyle(
-      color: Color(0x8a000000),
-      fontSize: 12.0,
-      fontWeight: FontWeight.w400,
-      fontStyle: FontStyle.normal,
-    ),
-    button: TextStyle(
-      color: Color(0xdd000000),
-      fontSize: 14.0,
-      fontWeight: FontWeight.w500,
-      fontStyle: FontStyle.normal,
-    ),
-    subtitle: TextStyle(
-      color: Color(0xff000000),
-      fontSize: 14.0,
-      fontWeight: FontWeight.w500,
-      fontStyle: FontStyle.normal,
-    ),
-    overline: TextStyle(
-      color: Color(0xff000000),
-      fontSize: 10.0,
-      fontWeight: FontWeight.w400,
-      fontStyle: FontStyle.normal,
-    ),
-  ),
   inputDecorationTheme: InputDecorationTheme(
     labelStyle: TextStyle(
       color: Color(0xffffffff),
@@ -346,7 +266,7 @@ final ThemeData myTheme = ThemeData(
       fontStyle: FontStyle.normal,
     ),
     errorMaxLines: null,
-    hasFloatingPlaceholder: true,
+    floatingLabelBehavior: FloatingLabelBehavior.auto,
     isDense: false,
     contentPadding:
         EdgeInsets.only(top: 12.0, bottom: 12.0, left: 0.0, right: 0.0),
diff --git a/example/pubspec.lock b/example/pubspec.lock
index a35b82c..7fbbbfd 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
   async:
     dependency: transitive
@@ -7,40 +7,82 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "2.1.0"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.2"
+    version: "1.3.1"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.11"
+    version: "1.15.0"
+  cross_file:
+    dependency: transitive
+    description:
+      name: cross_file
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.3.2"
+  csslib:
+    dependency: transitive
+    description:
+      name: csslib
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.17.1"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.2"
+    version: "1.0.4"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
   flutter:
     dependency: "direct main"
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.4"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -53,45 +95,85 @@ packages:
       relative: true
     source: path
     version: "0.3.7+8"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  html:
+    dependency: transitive
+    description:
+      name: html
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.15.0"
+  http:
+    dependency: transitive
+    description:
+      name: http
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.13.4"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.0.0"
   image_picker:
     dependency: "direct main"
     description:
       name: image_picker
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.6.0+10"
+    version: "0.8.4+4"
+  image_picker_for_web:
+    dependency: transitive
+    description:
+      name: image_picker_for_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.4"
+  image_picker_platform_interface:
+    dependency: transitive
+    description:
+      name: image_picker_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.4.1"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.3"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.5"
+    version: "0.12.10"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.7.0"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.2"
-  pedantic:
-    dependency: transitive
-    description:
-      name: pedantic
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.5.0"
-  quiver:
+    version: "1.8.0"
+  plugin_platform_interface:
     dependency: transitive
     description:
-      name: quiver
+      name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.2"
@@ -106,63 +188,77 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.5.5"
+    version: "1.8.1"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.3"
+    version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "1.1.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.4"
+    version: "0.4.2"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.3.0"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.1.0"
   video_player:
     dependency: "direct main"
     description:
       name: video_player
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.10.1+3"
+    version: "2.2.6"
+  video_player_platform_interface:
+    dependency: transitive
+    description:
+      name: video_player_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.2.0"
+  video_player_web:
+    dependency: transitive
+    description:
+      name: video_player_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.4"
 sdks:
-  dart: ">=2.2.2 <3.0.0"
-  flutter: ">=1.5.0 <2.0.0"
+  dart: ">=2.14.0 <3.0.0"
+  flutter: ">=2.5.0"
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 310b80f..3e5e29e 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the flutter_video_compress plugin.
 publish_to: 'none'
 
 environment:
-  sdk: ">=2.2.2 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
@@ -11,9 +11,9 @@ dependencies:
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^0.1.2
-  image_picker: ^0.6.0+10
-  video_player: ^0.10.1+3
+  cupertino_icons: ^1.0.4
+  image_picker: ^0.8.4+4
+  video_player: ^2.2.6
   
 dev_dependencies:
   flutter_test:
diff --git a/lib/model/media_info.dart b/lib/model/media_info.dart
index 0cf83b2..0ce5ae3 100644
--- a/lib/model/media_info.dart
+++ b/lib/model/media_info.dart
@@ -1,24 +1,24 @@
 part of flutter_video_compress;
 
 class MediaInfo {
-  String path;
-  String title;
-  String author;
-  int width;
-  int height;
+  String? path;
+  String? title;
+  String? author;
+  int? width;
+  int? height;
 
   /// [Android] API level 17
-  int orientation;
+  int? orientation;
 
   /// bytes
-  int filesize; // filesize
+  int? filesize; // filesize
   /// microsecond
-  double duration;
-  bool isCancel;
-  File file;
+  double? duration;
+  bool? isCancel;
+  File? file;
 
   MediaInfo({
-    @required this.path,
+    this.path,
     this.title,
     this.author,
     this.width,
@@ -40,7 +40,7 @@ class MediaInfo {
     filesize = json['filesize'];
     duration = double.tryParse('${json['duration']}');
     isCancel = json['isCancel'];
-    file = File(path);
+    file = File(path ?? "");
   }
 
   Map<String, dynamic> toJson() {
@@ -58,7 +58,7 @@ class MediaInfo {
     if (this.isCancel != null) {
       data['isCancel'] = this.isCancel;
     }
-    data['file'] = File(path).toString();
+    data['file'] = File(path ?? "").toString();
     return data;
   }
 }
diff --git a/lib/src/flutter_video_compress.dart b/lib/src/flutter_video_compress.dart
index a8eb1f8..4e69fad 100644
--- a/lib/src/flutter_video_compress.dart
+++ b/lib/src/flutter_video_compress.dart
@@ -26,14 +26,14 @@ class FlutterVideoCompress {
     }
   }
 
-  void _updateProgressState(double state) {
+  void _updateProgressState(double? state) {
     if (state != null) {
       compressProgress$.next(state);
     }
   }
 
-  Future<T> _invoke<T>(String name, [Map<String, dynamic> params]) async {
-    T result;
+  Future<T?> _invoke<T>(String name, [Map<String, dynamic>? params]) async {
+    T? result;
     try {
       result = params != null
           ? await _channel.invokeMethod(name, params)
@@ -59,8 +59,8 @@ class FlutterVideoCompress {
   ///   quality: 50,
   /// );
   /// ```
-  Future<Uint8List> getThumbnail(
-    String path, {
+  Future<Uint8List?> getThumbnail(
+    String? path, {
     int quality = 100,
     int position = -1,
   }) async {
@@ -87,7 +87,7 @@ class FlutterVideoCompress {
   /// );
   /// ```
   Future<File> getThumbnailWithFile(
-    String path, {
+    String? path, {
     int quality = 100,
     int position = -1,
   }) async {
@@ -100,7 +100,7 @@ class FlutterVideoCompress {
       'position': position,
     });
 
-    final file = File(filePath);
+    final file = File(filePath ?? "");
 
     return file;
   }
@@ -123,7 +123,7 @@ class FlutterVideoCompress {
   /// debugPrint(file.path);
   /// ```
   Future<File> convertVideoToGif(
-    String path, {
+    String? path, {
     int startTime = 0,
     int endTime = -1,
     int duration = -1, // When you do not know the end time
@@ -139,7 +139,7 @@ class FlutterVideoCompress {
       'duration': duration
     });
 
-    final file = File(filePath);
+    final file = File(filePath ?? "");
 
     return file;
   }
@@ -153,10 +153,10 @@ class FlutterVideoCompress {
   /// final info = await _flutterVideoCompress.getMediaInfo(file.path);
   /// debugPrint(info.toJson());
   /// ```
-  Future<MediaInfo> getMediaInfo(String path) async {
+  Future<MediaInfo> getMediaInfo(String? path) async {
     assert(path != null);
     final jsonStr = await _invoke<String>('getMediaInfo', {'path': path});
-    final jsonMap = json.decode(jsonStr);
+    final jsonMap = json.decode(jsonStr ?? "");
     return MediaInfo.fromJson(jsonMap);
   }
 
@@ -176,13 +176,13 @@ class FlutterVideoCompress {
   /// debugPrint(info.toJson());
   /// ```
   Future<MediaInfo> compressVideo(
-    String path, {
+    String? path, {
     VideoQuality quality = VideoQuality.DefaultQuality,
     bool deleteOrigin = false,
-    int startTime,
-    int duration,
-    bool includeAudio,
-    int frameRate,
+    int? startTime,
+    int? duration,
+    bool? includeAudio,
+    int? frameRate,
   }) async {
     assert(path != null);
     if (_isCompressing) {
@@ -205,7 +205,7 @@ class FlutterVideoCompress {
       'frameRate': frameRate,
     });
     _isCompressing = false;
-    final jsonMap = json.decode(jsonStr);
+    final jsonMap = json.decode(jsonStr ?? "");
     return MediaInfo.fromJson(jsonMap);
   }
 
@@ -228,6 +228,6 @@ class FlutterVideoCompress {
   /// await _flutterVideoCompress.deleteAllCache();
   /// ```
   Future<bool> deleteAllCache() async {
-    return await _invoke<bool>('deleteAllCache');
+    return await _invoke<bool>('deleteAllCache') ?? false;
   }
 }
diff --git a/lib/src/observable_builder.dart b/lib/src/observable_builder.dart
index bab92e6..09f4fae 100644
--- a/lib/src/observable_builder.dart
+++ b/lib/src/observable_builder.dart
@@ -12,7 +12,7 @@ class ObservableBuilder<T> {
   }
 
   Subscription subscribe(void onData(T event),
-      {Function onError, void onDone(), bool cancelOnError}) {
+      {Function? onError, void onDone()?, bool? cancelOnError}) {
     _notSubscribed = false;
     _observable.stream.listen(onData,
         onError: onError, onDone: onDone, cancelOnError: cancelOnError);
diff --git a/pubspec.yaml b/pubspec.yaml
index 7d01603..1c5d471 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,7 +5,7 @@ author: Tenkai Ruri<babichan@outlook.com>
 homepage: https://github.com/TenkaiRuri/flutter_video_compress
 
 environment:
-  sdk: ">=2.0.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
@@ -14,8 +14,8 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  image_picker: ^0.6.0+10
-  video_player: ^0.10.1+3
+  image_picker: ^0.8.4+4
+  video_player: ^2.2.6
 
 
 # For information on the generic Dart part of this file, see the