I am creating an app with flex for recording a video and i want to capture the first image of the video recorded, by now i use the following function in order to capture the
first image but its rather slow
private function capture():void
{
var bitmapData:BitmapData = new BitmapData(videoDisplay.width, videoDisplay.height);
bitmapData.draw(videoDisplay);
var jpg:JPEGEncoder = new JPEGEncoder();
var ba:ByteArray = jpg.encode(bitmapData);
var base64_enc: Base64Encoder = new Base64Encoder();
base64_enc.encodeBytes(ba,0,ba.length);
imgEncoded = base64_enc.toString();
}
and i would like to get the first frame of the recorded video as a thumb after it is recorded
is there any idea on how to achieve that?
Thanks in advance!
LoaderMax videoloader does it for you, you can check out source codes.
http://www.greensock.com/loadermax/
Related
I have a class assignment where I have to create a photo gallery and one of the stipulations is that the images need to be loaded from an external source. The reference code from our assignment was:
var myRequest:URLRequest = new URLRequest("bw1.jpg");
myLoader.load(myRequest);
addChild(myLoader);
My specific needs requires me to have up to 2 copies of the images on the screen at once, one as a thumbnail and a second as a fullsized image. I want it so that when a user clicks a thumbnail a new instance of the picture is created scaled to fullsize with 0 alpha and the current selected picture decreases in alpha as the new pic increases in alpha. Once the old pic is no longer visible it is removed from the stage.
I am having trouble figuring out how to create a copy of the image in actionscript and also my for loop seems to not be executing properly as it only ever goes through one iteration even when I have no error messages.
Here is a link to my code via pastebin: http://pastebin.com/iadgKgsk but to save you from having to switch back and forth between I will also past it here
import flash.display.Bitmap;
//creates a loader for each picture to be loaded, I know I could have an empty array
that I add to but created a full array to test.
var loaders:Array = [new Loader(),new Loader(), new Loader(), new Loader(), new
Loader(), new Loader(), new Loader(), new Loader(), new Loader(), new Loader()];
//stores the url request for each image to be loaded
var Requests:Array =[new URLRequest("pic1.jpg"),new URLRequest("pic2.jpg"),new
URLRequest("pic3.jpg"),
new URLRequest("pic4.jpg"),new URLRequest("pic5.jpg"),new URLRequest("pic6.jpg"), new
URLRequest("pic7.jpg"),
new URLRequest("pic8.jpg"), new URLRequest("pic9.jpg"),new URLRequest("pic10.jpg")];
//creates 2 empty arrays one to store the thumbnail sized pics the other fullsized.
Ideally I want one Array holding the bitmap data and the other holding the thumbnail
instances since I only need 2
// fullsized images at a time I can just create a new one and erase the old one in a
single function.
var pics:Array = new Array();
var pics2:Array = new Array();
//defines an empty bitMap variable as a placeholder for which to copy from redefined in
every iteration of the loop
var test:Bitmap;
//loops through every loader
for (var i in loaders);
{
// loads the loader and url request and creates a picture
loaders[i].load(Requests[i]);
//waits for the pic to load
loaders[i].contentLoaderInfo.addEventListener(Event.COMPLETE, loadComplete);
//after loader is loaded create pic from the data
function loadComplete(evt:Event):void
{
var i = "Test";
trace(i);
test= evt.target.content as Bitmap;
pics2[i] = test;
pics[i] =new Bitmap(test.bitmapData);
pics2[i] =new Bitmap(test.bitmapData);
//creates an image on the stage at runtime to help debug
var pic1 = new Bitmap(test.bitmapData);
addChild(pics[i])
pic1.scaleX = 0.138427734375;
pic1.scaleY = 0.1384114583333333;
pic1.x = 204;
pic1.y = 20.6;
pic1.alpha = .25;
var pic2:Bitmap = new Bitmap(test.bitmapData);
pic2.x =100;
pic2.y =100;
pic2.scaleX =.33;
pic2.scaleY=.33;
addChild(pic2);
loaders[i].contentLoaderInfo.removeEventListener(Event.COMPLETE,
loadComplete)
}
}
Your for loop is setup in a way that it would attempt to iterate for each property of the loaders instance which isn't what you want. You may want to investigate other AS3 bulk loader options too there are already some scripts out there to help take care of this.
Your loop should look like
for(var i=0; i<loaders.length; i++)
{
var curLoader = loaders[i].load(Requests[i]);
You can also see an example I put together that loads a bunch of images flipbook style animation (images generated with blender):
http://www.shaunhusain.com/DrawTextRandomly/
http://www.shaunhusain.com/DrawTextRandomly/srcview/
look in the utils.imageLoader package, I made two classes there that deal with loading the images, since they were output from Blender with sequential file names I just used some loops to load the images based on a numeric counter, in your case you could switch it to use a source array of images to load.
In the BatchImageLoader class I have a variable for how many loaders to allow it to make, I wanted to see the difference in performance in terms of memory vs load time (will depend on runtime environment too but I wanted to get a general idea, ended with leaving it at using 90 loaders at most).
I am doing an Adobe AIR Kiosk app but I am having a little problem.
First step is to generate a webcam container:
var bandwidth:int = 0;
var quality:int = 100;
var camera:Camera = Camera.getCamera();
camera.setQuality(bandwidth, quality);
camera.setMode(885,575,30,true);
var video:Video = new Video(885,575);
video.attachCamera(camera);
video.name = "camara";
webcam.addChild(video);
It works ok, the problem is that I want to apply to it a custom filter
It works ok if I write it this way:
MovieClip(parent).contenedor_postal.postal.webcam.filters = [filter];
But I want to affect only the child inside the clip "webcam" without affecting other MC's, so I write it like this:
MovieClip(parent).contenedor_postal.postal.webcam.camara.filters = [filter];
and does not work. I used to program in AS2, so maybe the trick is very simple but I can't find anything that works. Thanks in advance!
If the video has a name property "camara" then this should work:
MovieClip(parent).contenedor_postal.postal.webcam.getChildByName("camara").filters = [filter];
I want to make a screenshot of custom as3 ui element (which was extended from Canvas), and then upload the image on the server.
Could you help me with a small example of this?
I am trying to do the following:
// This is UI component extended from Canvas
var chessBoard:ChessBoard = new ChessBoard();
// I displayed pieces on the board, but didn't add it to the stage (I just need a
// a screenshot, not need them on the canvas)
chessBoard.displayPosition(DataStorage.getInstance().getStoredPosition(0));
var img:ImageSnapshot = ImageSnapshot.captureImage(chessBoard, 300, new PNGEncoder());
var obj:Object = new Object();
obj.complexity = complexity.value;
obj.img = img;
httpService.send(obj);
and getting this error:
ArgumentError: Error #2015: Invalid
BitmapData. at
flash.display::BitmapData() at
mx.graphics::ImageSnapshot$/captureBitmapData()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\graphics\ImageSnapshot.as:186]
at
mx.graphics::ImageSnapshot$/captureImage()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\graphics\ImageSnapshot.as:282]
at
ui::SendForm/send()[/Users/oleg/Documents/chess_problems/problemme/src/ui/SendForm.mxml:53]
at
> ui::SendForm/___SendForm_Button1_click()[/Users/oleg/Documents/chess_problems/problemme/src/ui/SendForm.mxml:16]
This error was caused by missing width and height of the Canvas. I set them and it helped to create bitmap data this way:
var bitmapData:BitmapData = new BitmapData(chessBoard.width,chessBoard.height);
var encoder:PNGEncoder = new PNGEncoder();
var data:ByteArray = encoder.encode(bitmapData);
I wonder how do I send the image to the server via httpService? Is there a way. Also is data = image file?
Here is a post on someone who has done this exact thing in AS3:
Dynamically Create an Image in Flash and Save it to the Desktop or Server
It is possible, and although I have never done it, this may be useful to you: http://www.flash-db.com/Tutorials/snapshot/
I'm working on a mp3 player and I'm super new at all things flash so there are lots of questions. Currently I'm getting stuck on the track change. My variable declaration look like this:
var index:int = -1;
var music:Sound = new Sound(new URLRequest("moe2008-05-24d02t02_vbr.mp3"));
var sc:SoundChannel;
var isPlaying:Boolean = false;
and my change track function looks like this:
function changeTrack(newTrack){
sc.stop();
isPlaying = false;
music = new Sound(new URLRequest(newTrack));
sc = music.play();
isPlaying = true;
index++;
}
Does anyone see any obvious errors???
Thanks
I think you should try to close the Sound connection (Sound.close()) before creating a new one. Also, I would use the same Sound object to load the new file (Sound.load()) to avoid possible GC problems (unless you need to fade in between sounds)...
Looks to me like you're missing the part where you actually load the external sound into a new sound object. Your example seems to be reusing the same sound object. Should be something like:
var sound:Sound = new Sound();
var request:URLRequest = new URLRequest("path/to/your/sound");
sound.load(request);
sc = sound.play();
You need the local sound variable to create a new sound as another sound instance cannot be loaded into an existing one:
Once load() is called on a Sound
object, you can't later load a
different sound file into that Sound
object. To load a different sound
file, create a new Sound object.
You'll probably want to use a Dictionary to keep track of which Sounds are loaded already. So when this method is called, you check if a sound object is registered in the dictionary and if it is, play that instead of loading a file.
As Flash Gordon said: "You're actually
redefing the local variables when you
reset its
property."http://www.actionscript.org/forums/archive/index.php3/t-181659.html
This line looks a bit suspicious.
sc = music.play();
Shouldn't that be:
var musicPlay = music.play();
sc = musicPlay;
How to assign bytearray value to panel background image. If anybody have idea or experiance plz help me to overcome the problem. BRIEF EXP:
I have panel control and want to load image getting from webservice as a backgroundimage. So i used setstyle() but its not accepting that image. so how to add that image into my panel background image.Plz tel me your ideas here.
In Flex 3 or higher, you just need to do:
yourImage.source = yourByteArray;
regards!
uhm, well i presume, since it is an image, you have it in a BitmapData, let's say "myBmp" ...
then use the following to extract all the data from BitmapData:
var bytes:ByteArray = myBmp.getPixels(myBmp.rect);
and the following to write:
myBmp.setPixels(myBmp.rect, bytes);
note that only the raw 32 bit pixel data is stored in the ByteArray, without compression, nor the dimensions of the original image.
for compression, you should refer to the corelib, as ozke said ...
For AS3 you can use adobe corelib. Check this tutorial...
http://ntt.cc/2009/01/09/as3corelib-tutorialhow-to-use-jpegencoder-and-pngencoder-class-in-flex.html
I used a flash.display.Loader() to load an image in an array. It has a Complete event that is fired after the image has been loaded. I then draw the image on to a Bitmap which I set to the data of a Image that could be placed in a panel. Hope you can make since of this good luck.
public static function updateImage(img:Image, matrix:Matrix,
pageDTO:PageDTO, bitmapData:BitmapData):void {
var loader:flash.display.Loader = new flash.display.Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, function (e:Event) : void {
bitmapData.draw(loader.content, matrix);
pageViewer.data = new Bitmap(bitmapData);
});
loader.loadBytes(pageDTO.thumbnail);
}
<mx:Panel>
<mx:Image id="pageViewer"/>
</mx:Panel>
Using adobe's JPGEncoder (com.adobe.images.JPGEncoder) class and ByteArray is pretty much all you need. Converting image to byte array (assuming CAPS are variables you'd need to fill in):
// -- first draw (copy) the image's bitmap data
var image:DisplayObject = YOUR_IMAGE;
var src:BitmapData = new BitmapData(image.width, image.height);
src.draw(image);
// -- encode the jpg
var quality:int = 75;
var jpg:JPGEncoder = new JPGEncoder(quality);
var byteArray:ByteArray = jpg.encode(src);
I had the same problem. As a workaround I created sub Canvas nested inside a main Canvas and added an Image to the main Canvas behind the sub Canvas. Anything drawn on the sub Canvas will appear on top of the Image.
Just load it into a Loader instance using the loadBytes function.
var ldr:Loader = new Loader();
ldr.loadBytes(myByteArray);
addChild(ldr);