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Changing the framerate playback of VideoFile in AS3 / Air App

Posted on 2008-10-13
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Last Modified: 2013-11-11
Hi, I'm trying to reproduce a video file using AIR.

I'm trying to set the framerate of the playback using the import flash.net.NetStream and flash.media.Video, specifically the NetStream.receiveVideoFPS(fps:Number) but it is not working.

Please help,

Thanks.





package etc.patexp
{
	import flash.display.Sprite;
	import flash.events.NetStatusEvent;
	import flash.events.SecurityErrorEvent;
	import flash.events.AsyncErrorEvent;
	import flash.events.KeyboardEvent;
	import flash.ui.Keyboard;
	import flash.net.NetConnection;
	import flash.net.NetStream;
	import flash.media.Video;
	
	
	/**
	 * ...
	 * @author Daniel Rodriguez
	 */
	public class Main extends Sprite 
	{
		
		private var videoURL:String = "video.flv";
        private var connection:NetConnection;
        private var stream:NetStream;
		
        public function Main():void
		{
            connection = new NetConnection();
            connection.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
            connection.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
            connection.connect(null);
        }
 
        private function netStatusHandler(event:NetStatusEvent):void 
		{
            switch (event.info.code) 
			{
                case "NetConnection.Connect.Success":
					stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDown);
                    connectStream();
                    break;
                case "NetStream.Play.StreamNotFound":
                    trace("Unable to locate video: " + videoURL);
                    break;
            }
        }
		
        private function connectStream():void 
		{
            stream = new NetStream(connection);
            stream.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
            stream.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);
			stream.client = new CustomClient();
            var video:Video = new Video();
            video.attachNetStream(stream);
            stream.play(videoURL);
            addChild(video);
        }
		
		
 
        private function securityErrorHandler(event:SecurityErrorEvent):void 
		{
            trace("securityErrorHandler: " + event);
        }
        
        private function asyncErrorHandler(event:AsyncErrorEvent):void 
		{
            // ignore AsyncErrorEvent events.
        }
		
		private function onKeyDown(evt:KeyboardEvent):void
		{
			stream.receiveVideoFPS(0);
		}
		
	}
	
}
class CustomClient {
    public function onMetaData(info:Object):void {
        trace("metadata: duration=" + info.duration + " width=" + info.width + " height=" + info.height + " framerate=" + info.framerate);
    }
    public function onCuePoint(info:Object):void {
        trace("cuepoint: time=" + info.time + " name=" + info.name + " type=" + info.type);
    }
}

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Question by:dornad
2 Comments
 
LVL 34

Expert Comment

by:Aneesh Chopra
ID: 22708384
As per my understanding,

NetStream.receiveVideoFPS() method works only for the Streaming server video stream.
this method is available only to clients subscribed to the specified stream, not to the stream's publisher.

If you pass a value to the FPS parameter to limit the frame rate of the video, the RTMP server attempts to reduce the frame rate while preserving the integrity of the video. The server sends the minimum number of frames needed to satisfy the desired rate between every two keyframes.

here in your code,  there is no RTMP server in play, your code is not actually connecting to any Media server.
following line of code shows that you are loading video as progressive download not streaming download.

 connection.connect(null);


I hope it would be clear..

-------------------
Aneesh Chopra
-------------------



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Accepted Solution

by:
dornad earned 0 total points
ID: 22711249
Ohhhh.....

Funny, cause I'm not using a Streaming Video Server.  I'm just loading the file from the local hard disk.   All I need to do is slow-down or speed-up the video ?  

I thought that using fps would be the way to go here.
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