我使用image_picker录制视频，但是我想限制视频的时间
我使用image_picker开发了视频录制。 我们需要限制视频录制时间。
pubspec.yaml 依赖项： image_picker：^ 0.4.10
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exit code 0
// Open the camera for recording Code
ImagePicker.pickVideo(source: ImageSource.camera).then((File file) {
if (file != null && mounted) {
var tempFile = file;
}
});
我想在打开相机之前设置记录时间。 我该怎么办？
2 个答案:
答案 0 :(得分：0)
使用Android上的Intent（ACTION_VIDEO_CAPTURE）和ios中的UIModal启动摄像机录制。它不是可以根据您的需求进行自定义的插件，它也可以满足您的预期。活动和UIModal UI是为此目的而构建的。做您想做的最好的方法是：
答案 1 :(得分：0)
@ Coding24h：
以下是捕获视频并播放视频的dart文件，说明：
- 导入自我飞镖：
dart文件：
（1）'GlobalVariables.dart'-包含带有静态变量的类'gv'，所有“页面/小部件”都可以访问
（2）'LangStrings.dart'-此应用是多国语言，此dart文件包含不同语言的字符串（英语，中文......）
（3）'ScreenVariables.dart'-包含所有与屏幕相关的变量，例如方向，高度，宽度，物理高度，devicepixelratio ......
（4）'Utilities.dart'-包含可被所有'Pages'使用的'utilities functions'，例如，在任何时候，任何地方显示一条祝酒消息。
-
InitState（）方法：这是声明和初始化相机控件的地方。
-
dispose（）方法：在以下情况下，视频录制将手动停止：（1）用户单击“停止”按钮，或（2）用户离开此页面。当用户切换到另一个应用程序或关闭手机屏幕时，视频录制也会自动停止。无论哪种情况，都应将相机控制对象放置在dispose（）
中
-
didChangeAppLifecycleState（）方法：如果应用程序进入后台，则暂停视频播放。
-
funTimerVideo（）方法：一个计时器，它每秒更改一次“ Slider”的位置。 （如果该用户有录像限制，则可以创建另一个计时器来停止录像）
-
funSelectVideo（）方法：从图库中选择视频。
-
funCameraStart（）方法：开始捕获图片以供将来预览，然后开始捕获视频
-
funCameraStop（）方法：停止捕获视频，如果满足以下条件，则可以调用此方法：（1）用户按下“ Video Recording Stop”按钮，或者（2）我在“ funTimerVideo”中提到的“另一个计时器” '在超出记录限制时调用此方法。
屏幕捕获（视频播放器和捕获屏幕）：
程序源代码（仅适用于视频播放器和捕获页面）：
// Import Flutter Darts
import 'dart:io';
import 'package:camera/camera.dart';
import 'package:file_picker/file_picker.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:intl/intl.dart';
import "package:threading/threading.dart";
import 'package:video_player/video_player.dart';
// Import Self Darts
import 'GlobalVariables.dart';
import 'LangStrings.dart';
import 'ScreenVariables.dart';
import 'Utilities.dart';
// Import Pages
import 'BottomBar.dart';
// Home Page
class ClsHome extends StatefulWidget {
@override
_ClsHomeState createState() => _ClsHomeState();
}
class _ClsHomeState extends State<ClsHome> with WidgetsBindingObserver {
AppLifecycleState _lastLifecycleState;
// Declare Camera
CameraController ctlCamera;
// Var for Video
bool bolVideoPaused = true;
@override
void initState() {
super.initState();
print("Init State Started");
if (gv.bolHomeFirstInit) {
// This page is called by navigator.push twice, do nothing on the first call
gv.bolHomeFirstInit = false;
} else {
// Not the first time call of Init, do Init
WidgetsBinding.instance.addObserver(this);
try {
// Try to dispose old Camera Control
ctlCamera.dispose();
print("Camera Disposed 1");
} catch (err) {
print("Camera Dispose Error: " + err.toString());
}
try {
// Declare New Camera Control
ctlCamera = CameraController(gv.cameras[1], ResolutionPreset.high);
ctlCamera.initialize().then((_) {
if (!mounted) {
ut.showToast('1:' + ls.gs('SystemErrorOpenAgain'), true);
return;
}
setState(() {});
print('Controller Inited');
});
} catch (err) {
ut.showToast('2:' + ls.gs('SystemErrorOpenAgain'), true);
print("Camera Init Error: " + err.toString());
}
try {
gv.threadHomeVideo = new Thread(funTimerVideo);
gv.threadHomeVideo.start();
print('New Video Timer Started');
} catch (err) {
ut.showToast('3:' + ls.gs('SystemErrorOpenAgain'), true);
print('New Video Timer Error: ' + err.toString());
}
}
print("Init State Ended");
}
@override
void dispose() async {
super.dispose();
print("Dispose Started");
if (gv.bolHomeFirstDispose) {
gv.bolHomeFirstDispose = false;
} else {
WidgetsBinding.instance.removeObserver(this);
try {
await funCameraStop();
ctlCamera?.dispose();
print("Camera Disposed");
} catch (err) {
//
print("Play Video Dispose Error 1: " + err.toString());
}
try {
// gv.ctlVideo?.dispose();
gv.ctlVideo.pause();
// gv.threadPageHomeVideo.abort();
// print('Thread Video Aborted');
} catch (err) {
//
print("Play Video Dispose Error 2: " + err.toString());
}
// print('Controller dispose');
}
print("Dispose Ended");
}
@override
void didChangeAppLifecycleState(AppLifecycleState state) {
_lastLifecycleState = state;
print('***** Life Cycle State: ' + _lastLifecycleState.toString() + ' *****');
if (_lastLifecycleState.toString() == 'AppLifecycleState.paused') {
try {
if (gv.ctlVideo.value.isPlaying) {
bolVideoPaused = true;
gv.ctlVideo.pause();
}
setState(() {});
} catch (err) {
//
}
} else if (_lastLifecycleState.toString() == 'AppLifecycleState.resumed') {
}
}
// Timer to setState Video Play Position
void funTimerVideo() async {
while (true) {
await Thread.sleep(1000);
try {
if (gv.ctlVideo.value.isPlaying) {
gv.dblHomeVDSliderValueMS =
gv.ctlVideo.value.position.inMilliseconds.toDouble();
setState(() {});
}
} catch (err) {
// Video Not Yet Ready, Do Nothing
}
}
}
// Select Video from External Storage
funSelectVideo() async {
print('Select Video Started');
String filePath = '';
filePath = await FilePicker.getFilePath(type: FileType.VIDEO);
if (filePath != '') {
try {
// Declare Video if a video file is selected
gv.ctlVideo = VideoPlayerController.file(File(filePath))
..initialize().then((_) {
// Set Video Looping
gv.ctlVideo.setLooping(true);
// Get Video Duration in Milliseconds
gv.intHomeVDMS = gv.ctlVideo.value.duration.inMilliseconds;
setState(() {});
print('Video Inited');
});
} catch (err) {
print('Video Init Error: ' + err.toString());
gv.intHomeVDMS = 0;
ut.showToast(ls.gs('VideoErrorUnsupport'), true);
}
} else {
print('No Video Selected');
setState(() {});
}
print('Select Video Ended');
}
// The Widget that show the Video Player
Widget ctnVideoPlayer() {
try {
double dblHeight = sv.dblBodyHeight / 1.8;
print('Before Check Video Init');
if (gv.ctlVideo.value.initialized) {
print('Before Check Video AspectRatio');
if (gv.ctlVideo.value.aspectRatio < 1) {
dblHeight = sv.dblBodyHeight / 1.25;
}
print('Before Return ctnVideoPlayer');
return Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Container(
padding: EdgeInsets.fromLTRB(0, 10, 0, 10),
height: dblHeight,
width: sv.dblScreenWidth,
child: Center(
child: AspectRatio(
aspectRatio: gv.ctlVideo.value.aspectRatio,
child: VideoPlayer(gv.ctlVideo),
),
),
),
objVideoSlider(),
],
);
print('After Return ctnVideoPlayer');
} else {
print('Before Return EMPTY ctnVideoPlayer');
return Container(
// color: Colors.white,
height: dblHeight,
width: sv.dblScreenWidth,
child: Center(
child: Text(ls.gs('SelectVideo')),
),
);
print('After Return EMPTY ctnVideoPlayer');
}
} catch (err) {
print('Page Home ctnVideoPlayer() : ' + err.toString());
return Container(
// color: Colors.white,
height: sv.dblBodyHeight / 1.8,
width: sv.dblScreenWidth,
child: Center(
child: Text(ls.gs('SelectVideo')),
),
);
}
}
// function when Play or Pause clicked
funPlayVideo() async {
try {
if (gv.ctlVideo.value.initialized) {
if (gv.ctlVideo.value.isPlaying) {
bolVideoPaused = true;
gv.ctlVideo.pause();
// Stop Camera Recording
funCameraStop();
} else {
bolVideoPaused = false;
gv.ctlVideo.play();
// Start Camera Recording
funCameraStart();
}
setState(() {});
} else {
// Do Nothing
}
} catch (err) {
// Do Nothing
}
}
// function when Forward 15 seconds clicked
funForwardVideo() async {
try {
if (gv.ctlVideo.value.initialized) {
gv.ctlVideo.seekTo(gv.ctlVideo.value.position + Duration(seconds: 15));
setState(() {});
} else {
// Do Nothing
}
} catch (err) {
// Do Nothing
}
}
// function when Backward 15 seconds clicked
funBackwardVideo() async {
try {
if (gv.ctlVideo.value.initialized) {
gv.ctlVideo.seekTo(gv.ctlVideo.value.position - Duration(seconds: 15));
setState(() {});
} else {
// Do Nothing
}
} catch (err) {
// Do Nothing
}
}
// Widget to show the Slider of the playing position of Video
Widget objVideoSlider() {
try {
if (gv.ctlVideo.value.initialized) {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Text(' '),
Text(gv.ctlVideo.value.position.inHours.toString() +
":" +
(gv.ctlVideo.value.position.inMinutes % 60)
.toString()
.padLeft(2, '0') +
":" +
(gv.ctlVideo.value.position.inSeconds % 60)
.toString()
.padLeft(2, '0')),
Expanded(
child: CupertinoSlider(
min: 0.0,
max: gv.intHomeVDMS.toDouble(),
divisions: (gv.intHomeVDMS / 1000).toInt(),
value: gv.dblHomeVDSliderValueMS,
onChanged: (double dblNewValue) {
objVideoSliderChanged(dblNewValue);
},
),
),
Text(gv.ctlVideo.value.duration.inHours.toString() +
":" +
(gv.ctlVideo.value.duration.inMinutes % 60)
.toString()
.padLeft(2, '0') +
":" +
(gv.ctlVideo.value.duration.inSeconds % 60)
.toString()
.padLeft(2, '0')),
Text(' '),
],
);
} else {
return Container();
}
} catch (err) {
return Container();
}
}
// Function when Slider Changed Manually
objVideoSliderChanged(dblNewValue) {
gv.dblHomeVDSliderValueMS = dblNewValue;
gv.ctlVideo
.seekTo(Duration(milliseconds: gv.dblHomeVDSliderValueMS.toInt()));
setState(() {});
}
// Function Start Camera
void funCameraStart() async{
// Declare File Name
DateTime dtTimeStamp() => DateTime.now();
String strTimeStamp = DateFormat('yyyyMMdd_kkmmss').format(dtTimeStamp());
String strMovieFile = gv.strMoviePath + '/' + strTimeStamp + '.mp4';
gv.strImageFile = gv.strImagePath + '/' + strTimeStamp;
print('File Path: ' + strMovieFile);
try {
await ctlCamera.takePicture(gv.strImageFile + '_01.jpg');
await ctlCamera.startVideoRecording(strMovieFile);
} catch(err) {
ut.showToast('4:' + ls.gs('SystemErrorOpenAgain'), true);
}
}
// Function Stop Camera
void funCameraStop() async{
try {
await ctlCamera.stopVideoRecording();
} catch(err) {
// ut.showToast('5:' + ls.gs('SystemErrorOpenAgain'), true);
}
try {
await ctlCamera.takePicture(gv.strImageFile + '_02.jpg');
} catch(err) {
// ut.showToast('5:' + ls.gs('SystemErrorOpenAgain'), true);
}
}
// Main Widget
@override
Widget build(BuildContext context) {
try {
if (ctlCamera != null) {
if (!ctlCamera.value.isInitialized) {
print('return Container');
return Container();
}
print('Before Return');
return Scaffold(
appBar: PreferredSize(
child: AppBar(
title: Text(
ls.gs('Player'),
style: TextStyle(fontSize: sv.dblDefaultFontSize),
),
),
preferredSize: new Size.fromHeight(sv.dblTopHeight),
),
body: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
ctnVideoPlayer(),
Stack(children: <Widget>[
Container(
// color: Colors.white,
height: sv.dblBodyHeight / 25,
width: sv.dblScreenWidth,
child: Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Text(' '),
AspectRatio(
aspectRatio: ctlCamera.value.aspectRatio,
child: CameraPreview(ctlCamera),
),
]),
),
),
Container(
// color: Colors.white,
height: sv.dblBodyHeight / 25,
width: sv.dblScreenWidth,
child: Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
RaisedButton(
onPressed: () => funSelectVideo(),
child: Icon(Icons.folder_open),
),
Text(' '),
RaisedButton(
onPressed: () => funBackwardVideo(),
child: Icon(FontAwesomeIcons.angleDoubleLeft),
),
Text(' '),
RaisedButton(
onPressed: () => funPlayVideo(),
child: bolVideoPaused
? Icon(Icons.play_arrow)
: Icon(Icons.pause),
),
Text(' '),
RaisedButton(
onPressed: () => funForwardVideo(),
child: Icon(FontAwesomeIcons.angleDoubleRight),
),
],
),
),
),
])
]),
bottomNavigationBar: ClsBottom(),
);
} else {
return Container();
}
} catch (err) {
print('PageHome Error build: ' + err.toString());
return Container();
}
}
}
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