我正在开发一个用于录制视频并将其预览为tilelist的应用程序。是否有任何方法可以捕获视频帧以用作列表中的缩略图?我正在使用Flex 4.5。
答案 0 :(得分:1)
来自this answer:
var frameGrab:BitmapData = new BitmapData(clip.width, clip.height, false, 0);
frameGrab.draw(clip); // the .draw() method will copy the frame from your video.
var frame:Bitmap = new Bitmap(frameGrab);
答案 1 :(得分:0)
private function capture(filename:String):void
{
var bitmapData:BitmapData = new BitmapData(videoDisplay.width, videoDisplay.height);
bitmapData.draw(videoDisplay,new Matrix());
var bitmap : Bitmap = new Bitmap(bitmapData);
var jpg:JPEGEncoder = new JPEGEncoder();
var ba:ByteArray = jpg.encode(bitmapData);
var newImage:File = File.desktopDirectory.resolvePath("foldername/"+filename+".jpg");
fileStream = new FileStream();
fileStream.open(newImage, FileMode.UPDATE);
fileStream.writeBytes(ba);
fileStream.close();
}
这是用户点击记录时调用的方法。所以我像拇指一样抓取照片!我希望上面的内容能够帮助其他人寻找类似的东西...... 非常感谢!
答案 2 :(得分:0)
另一种方法:
将事件监听器附加到视频流(即NetStream
),如下所示:
var vConnection:NetConnection = new NetConnection();
vConnection.connect(null);
var vStream:NetStream = new NetStream(vConnection);
vStream.addEventListener(NetStatusEvent.NET_STATUS, onNetStatusChange);
然后听众看起来像这样:
protected function onNetStatusChange(event:NetStatusEvent):void
{
switch(event.info.code)
{
case "NetStream.Play.Start":
{
vStream.seek(1); // seek to key frame
break;
}
case "NetStream.Video.DimensionChange":
{
// after a dimension change we have a loaded frame
// do whatever you want here, but keep in mind
// that the video needs to be on the display list
// if you want to draw it
break;
}
default: break;
}
}