Flutter VLC Player implementation - flutter

Is there something I am missing setting up the VLC on flutter? Only empty. No player seen just a blank page here is my flutter code, just followed from their documentation. Here is the code. I might miss something. Is there any alternative way to use the VLC plugin? I am new to Flutter. Thank you
import 'package:flutter_vlc_player/flutter_vlc_player.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({key}) : super(key: key);
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
late VlcPlayerController _videoPlayerController;
#override
void initState() {
super.initState();
_videoPlayerController = VlcPlayerController.network(
'https://local.clift.mdu1.net/3ABN/index.m3u8',
hwAcc: HwAcc.FULL,
autoPlay: false,
options: VlcPlayerOptions(),
);
}
#override
void dispose() async {
super.dispose();
await _videoPlayerController.stopRendererScanning();
await _videoPlayerController.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: VlcPlayer(
controller: _videoPlayerController,
aspectRatio: 16 / 9,
placeholder: Center(child: CircularProgressIndicator()),
),
),
);
}
}```

try to add setstate in initState, or intime equal vlccontroller to VlcPlayerController.network

Related

flutter_osm_plugin: ^0.50.0-alpha.5 for web Cannot read properties of null (reading 'contentWindow')

import 'package:flutter/material.dart';
import 'package:flutter_osm_plugin/flutter_osm_plugin.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
routes: {
'/main': (context) => MyHomePage(title: 'Title'),
'/osm': (context) => Osm(),
},
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const Osm(),
);
}
}
class Osm extends StatelessWidget {
const Osm({super.key});
#override
Widget build(BuildContext context) {
return Column(
children: [
TextButton(
onPressed: () {
Navigator.pushNamed(context, '/main');
},
child: const Text('Button'))
],
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
#override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
late MapController controller;
#override
void dispose() {
controller.dispose();
super.dispose();
}
#override
void initState() {
controller = MapController(
initMapWithUserPosition: false,
initPosition: GeoPoint(latitude: 47.4358055, longitude: 8.4737324),
areaLimit: BoundingBox(
east: 10.4922941,
north: 47.8084648,
south: 45.817995,
west: 5.9559113,
),
);
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: OSMFlutter(
controller: controller,
trackMyPosition: false,
initZoom: 12,
minZoomLevel: 8,
maxZoomLevel: 14,
stepZoom: 1.0,
),
);
}
}
Add this line below 👇 in index.html in web folder
<script src="packages/flutter_osm_web/src/asset/map_init.js"></script>
When you first switch to a map widget, the map opens normally. If you return to the previous widget and go to the map again, an error occurs.
TypeError: Cannot read properties of null (reading 'contentWindow')
packages/flutter_osm_web/src/asset/map.js 182:65 setUpMap
packages/flutter_osm_web/src/controller/web_osm_controller.dart 141:35 initPositionMap
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 84:54 runBody
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 123:5 _async
packages/flutter_osm_web/src/controller/web_osm_controller.dart 137:31 initPositionMap
packages/flutter_osm_interface/src/map_controller/base_map_controller.dart 49:31
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 84:54 runBody
If you restart, the card is loaded.I.e. the card opens only after restart.
Sometimes writes console: ChromeProxyService: Failed to evaluate expression 'androidOSMLifecycle': InternalError: Expression evaluation in async frames is not supported. No frame with index 16..
How to solve such a problem? The problem occurs on initPositionMap.

Non-nullable instance field ['controller'] must be initialized in flutter

Good day!
I am a new to Flutter to would like to start my Startup but I was trapped in this problem to make Tabbar example...
I have almost been frustrated all day because of this problems....
Dart Analysis keeps saying this below....
Non-nullable instance field ['controller'] must be initialized in flutter
really appreciate in advance.
import 'package:flutter/material.dart';
import 'sub/firstPage.dart';
import 'sub/secondPage.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin {
TabController controller;
#override
void initState() {
super.initState();
controller = TabController(length: 2, vsync: this);
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('TabBar Example'),
),
body: TabBarView(
children: <Widget>[FirstApp(), SecondApp()],
controller: controller,
),
bottomNavigationBar: TabBar(tabs: [
Tab(icon: Icon(Icons.looks_one, color: Colors.blue),),
Tab(icon: Icon(Icons.looks_two, color: Colors.blue),),
],
)
);
}
#override
void dispose() {
controller.dispose();
super.dispose();
}
}
Plase try, you missed use controller
import 'package:flutter/material.dart';
import 'sub/firstPage.dart';
import 'sub/secondPage.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin {
late TabController controller;
#override
void initState() {
super.initState();
controller = TabController(length: 2, vsync: this);
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('TabBar Example'),
),
body: TabBarView(
children: <Widget>[FirstApp(), SecondApp()],
controller: controller,
),
bottomNavigationBar: TabBar(
controller: controller, // add here
tabs: [
Tab(icon: Icon(Icons.looks_one, color: Colors.blue),),
Tab(icon: Icon(Icons.looks_two, color: Colors.blue),),
],
)
);
}
#override
void dispose() {
controller.dispose();
super.dispose();
}
}
Since your field does not allow null values, but you cannot initialize your field when it's created, you have to declare it as late:
late TabController controller;
This allows you to assign a value later, but you will get an exception if you use it before it was assigned. The way your code looks, it should be okay.
It looks like you are using null safety in your project. So the dart is complaining about this line. Dart expects it to be initialized right after it was created:
TabController controller;
To fix the problem add the "late" keyword before TabController:
late TabController controller;

how can i play rtsp video stream in flutter?

this is my code thats i m trying by using flutter vlc player but its not working so any can help me to solving the issue or i can show stream with another way?
so you guys can give me any suggestion or give any little example. i m trying to solve this issue from last two hours but its not going
import 'package:flutter/material.dart';
import 'package:flutter_vlc_player/flutter_vlc_player.dart';
import 'package:flutter_vlc_player/vlc_player.dart';
import 'package:flutter_vlc_player/vlc_player_controller.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key}) : super(key: key);
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
VlcPlayerController _videoPlayerController;
#override
void initState() {
super.initState();
_videoPlayerController = VlcPlayerController.network(
'rtsp://viewer:aeDoPhiucees3gohshie#173.249.14.110:27954/axis-media/media.amp?videocodec=h264&fps=15&audio=1&resolution=640x480',
hwAcc: HwAcc.FULL,
autoPlay: false,
options: VlcPlayerOptions(),
);
}
#override
void dispose() async {
super.dispose();
await _videoPlayerController.stopRendererScanning();
await _videoPlayerController.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: VlcPlayer(
controller: _videoPlayerController,
aspectRatio: 16 / 9,
placeholder: Center(child: CircularProgressIndicator()),
),
),
);
}
}
Here is a small example that works for me. I think the problem is that in the newer versions the Controller must be initialized immediately.
The only problems I have with this code is that the advanced options take no effect. Unfortunately it is hard to find some good information
import 'package:flutter/material.dart';
import 'package:flutter_vlc_player/flutter_vlc_player.dart';
import 'package:flutter_vlc_player/src/vlc_player_controller.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
VlcPlayerController _vlcViewController = new VlcPlayerController.network(
"rtsp://192.72.1.1/liveRTSP/av4",
autoPlay: true,
);
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new VlcPlayer(
controller: _vlcViewController,
aspectRatio: 16 / 9,
placeholder: Text("Hello World"),
),
],
),
),
);
}
}
Check out this lib: https://pub.dev/packages/flutter_playout. It does support HLS.

I'm having these issues with flutter_vlc_player, why is that?

I'm testing a dependency of flutter and having these issues while trying to show video streaming using ngrok, these are the issues i have:
E/VLC (15337): [00000071a614bc90/3c35] libvlc stream: HTTP connection failure
E/VLC (15337): [00000071a614bc90/3c35] libvlc stream: connection failed: Network is unreachable
E/VLC (15337): [00000071a614bc90/3c35] libvlc stream: cannot connect to ae872c2bd308.ngrok.io:80
and this is code I'm using:
import 'package:flutter/material.dart';
import 'package:flutter_vlc_player/flutter_vlc_player.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key}) : super(key: key);
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
VlcPlayerController _videoPlayerController;
#override
void initState() {
super.initState();
_videoPlayerController = VlcPlayerController.network(
'http://ae872c2bd308.ngrok.io/stream',
hwAcc: HwAcc.FULL,
autoPlay: false,
options: VlcPlayerOptions(),
);
}
#override
void dispose() async {
super.dispose();
await _videoPlayerController.stopRendererScanning();
await _videoPlayerController.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: VlcPlayer(
controller: _videoPlayerController,
aspectRatio: 16 / 9,
placeholder: Center(child: CircularProgressIndicator()),
),
),
);
}
}
Any idea of what could be the problem?
I tested the transmission using VLC player and it is possible to make it work.
Add autoPlay: true to the controller so it becomes
_videoPlayerController = VlcPlayerController.network(
'http://ae872c2bd308.ngrok.io/stream',
hwAcc: HwAcc.FULL,
autoPlay: true,
options: VlcPlayerOptions(),
);

How catch the opening and closing of the drawer in flutter?

How can I catch the opening and closing of the drawer in flutter? In principle, two objects must be are used for this purpose: DrawerController, which "holds" the drawer and the drawerCallback. drawerCallback should track the opening and closing of the drawer, but the code that is discussed at https://github.com/flutter/flutter/issues/21272 and https://github.com/flutter/flutter/issues/23630 does not works. Anyone can advise something?
Update 2021-12:
Scaffold(
drawer: DrawerWidget(),
onDrawerChanged: (isDrawerOpen) {
if(isDrawerOpen) {
//drawer is open
} else {
//drawer is close
}
},
body: bodyWidget(),
)
You can first refer to other people's replies on stackoverflow here
My solve:
get Drawer status on DrawerWidget
initState() : open drawer
dispose() : close drawer
Stream drawer status by DrawerService Provider
see full code
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:provider/provider.dart';
void main() {
runApp(
MultiProvider(
providers: [
Provider(create: (_) => DrawerService()),
],
child: MyApp(),
),
);
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
DrawerService _drawerService;
String drawerStatus = 'close';
#override
void initState() {
super.initState();
_drawerService = Provider.of(context, listen: false);
_listenDrawerService();
}
_listenDrawerService() {
_drawerService.status.listen((status) {
if(status) {
drawerStatus = 'open';
} else {
drawerStatus = 'close';
}
setState(() { });
});
}
#override
Widget build(BuildContext context) {
Color bgColor = Colors.yellow;
if(drawerStatus == 'open') {
bgColor = Colors.red;
}
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
drawer: DrawerWidget(),
body: Container(
decoration: BoxDecoration(color: bgColor),
height: 300,
child: Center(child: Text(drawerStatus),),
),
);
}
}
class DrawerWidget extends StatefulWidget {
#override
_DrawerWidgetState createState() => _DrawerWidgetState();
}
class _DrawerWidgetState extends State<DrawerWidget> {
DrawerService _drawerService;
#override
void initState() {
super.initState();
_drawerService = Provider.of(context, listen: false);
_drawerService.setIsOpenStatus(true);
}
#override
Widget build(BuildContext context) {
return Drawer(
child: Center(child: Text('drawer'),),
);
}
#override
void dispose() {
super.dispose();
_drawerService.setIsOpenStatus(false);
}
}
class DrawerService {
StreamController<bool> _statusController = StreamController.broadcast();
Stream<bool> get status => _statusController.stream;
setIsOpenStatus(bool openStatus) {
_statusController.add(openStatus);
}
}