所以这可能有点麻烦......我正在尝试使用名为 FLARToolkit 的 Flash 插件在增强现实中播放视频剪辑。我有一个绿屏视频,我需要在飞机上播放视频。我目前正在使用 MovieClipMaterial 将视频放置在显示平面上。我想遍历显示平面中的像素并更改与绿屏中的绿色匹配的像素,并将这些像素设置为透明的色度键控。可能有一种更有效的方法可以做到这一点,我愿意接受建议。
我还研究了 ColorMatrixFilters,但我无法设计一种使其具有选择性的方法,而不是过滤掉剪辑中的所有绿色。
这是我现在的代码:
[SWF(width='640', height='480', backgroundColor='#000000', frameRate='40')]
public class HelloFLAR extends Sprite
{
private var fm:FLARManager;
private var scene:Scene3D;
private var view:Viewport3D;
private var camera:FLARCamera3D;
private var bre:BasicRenderEngine;
private var lre:LazyRenderEngine;
private var p:Plane;
private var con:DisplayObject3D;
private var marker:FLARMarker;
private var v:Vid;
private var mat:MovieMaterial
private var bmd:BitmapData;
private var videoStream:NetStream;
private var container:FLARBaseNode;
private var RGBRaster:FLARRgbRaster_BitmapData;
public function HelloFLAR()
{
initFLAR();
v = new Vid();
//source for displayed video
v.vid.source = "Reuters.m4v";
v.vid.stop();
}
private function initFLAR():void
{
fm = new FLARManager("flarConfig.xml");
fm.addEventListener(FLARMarkerEvent.MARKER_ADDED, onAdded);
fm.addEventListener(FLARMarkerEvent.MARKER_REMOVED, onRemoved);
fm.addEventListener(Event.INIT, init3D);
addChild(Sprite(fm.flarSource));
}
private function onAdded(e:FLARMarkerEvent):void
{
marker = e.marker;
p.visible = true;
v.vid.play();
}
private function onRemoved(e:FLARMarkerEvent):void
{
marker = null;
p.visible = false;
v.vid.stop();
}
private function init3D(e:Event):void
{
scene = new Scene3D();
camera = new FLARCamera3D(fm.cameraParams);
camera.z = -30;
view = new Viewport3D(640, 480, true);
lre = new LazyRenderEngine(scene,camera,view);
//Display plane and Videp material
mat = new MovieMaterial(v, false, true);
p = new Plane(mat, 320, 240, 2, 2);
mat.doubleSided = true;
p.rotationZ = 90;
p.visible = true;
//Green Leech from video plane (Attempt at chromakeying)
var matrix:Array = new Array();
matrix = matrix.concat([1,0,0,0,0]); //Red
matrix = matrix.concat([0,1,0,0,0]); //Green
matrix = matrix.concat([0,0,1,0,0]); //Blue
matrix = matrix.concat([0,-1,0,0,0]); //Alpha
var color_filter:ColorMatrixFilter = new ColorMatrixFilter(matrix);;
v.filters = [color_filter];
//container for display Plane
con = new DisplayObject3D();
con.addChild(p);
//Add plane container to scene
scene.addChild(con);
addChild(view);
addChild(new FramerateDisplay());
addEventListener(Event.ENTER_FRAME, loop);
//addEventListener(Event.ENTER_FRAME, pixelCheck);
}
private function loop(e:Event):void
{
if(marker != null)
{
con.transform = FLARPVGeomUtils.convertFLARMatrixToPVMatrix(marker.transformMatrix);
}
lre.render();
}
我似乎无法访问视频的像素。我尝试通过平面和 MovieClipMaterial 访问像素,但没有成功。
任何帮助将不胜感激!
修会