捕获视频到画布抖动 [英] Capture video to canvas flutter
本文介绍了捕获视频到画布抖动的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想实现一个视频到画布应用程序,就像我在 js 中的例子一样:http://jsfiddle.net/Ls9kfwot/2/
I would like to implement a video to canvas app like my example in js : http://jsfiddle.net/Ls9kfwot/2/
但我的问题是如何在特定区域截取视频播放器的屏幕截图?像drawImage中的js:
But my problem is how i can take a screenshot of video player in a specific area? like js in drawImage:
ctx.drawImage(sx,sy,swidth,sheight,x,y,width,height); // js drawimage
但是在 Flutter 中,我可以使用什么将视频复制到画布上?
but in Flutter what can i use for reproduce video to canvas?
我用视频播放器创建了一个简单的 flutter 项目:
i created a simple flutter project with a video player:
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: YoYoPlayer(
aspectRatio: 16 / 9,
url:
"http://upload.wikimedia.org/wikipedia/commons/7/79/Big_Buck_Bunny_small.ogv",
videoStyle: VideoStyle(),
videoLoadingStyle: VideoLoadingStyle(
loading: Center(
child: Text("Loading video"),
//capture image of video and display it
),
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
RenderRepaintBoundary 和 drawImage 是解决方案吗?
RenderRepaintBoundary and drawImage is the solution?
推荐答案
是的,RenderRepaintBoundary 和 drawImage 正是您想要的.
Yep, RenderRepaintBoundary and drawImage is what you want.
GlobalKey _repaintKey = GlobalKey();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: RenderRepaintBoundary(
key: _repaintKey,
child: YoYoPlayer(
aspectRatio: 16 / 9,
url:
"http://upload.wikimedia.org/wikipedia/commons/7/79/Big_Buck_Bunny_small.ogv",
videoStyle: VideoStyle(),
videoLoadingStyle: VideoLoadingStyle(
loading: Center(
child: Text("Loading video"),
//capture image of video and display it
),
),
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
final boundary = _repaintKey.context.findRenderObject() as RenderRepaintBoundary;
final image = await boundary.toImage();
canvas.drawImage(image, Offset(10, 20), paint);
这篇关于捕获视频到画布抖动的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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