Question

我们需要显示用户正在使用JW Player观看的视频的帧速率。我们已经尝试过使用JW Player 7 API尝试了所有内容，但它并没有为我们提供客户端帧速率。

我们已经构建了一个JW Player插件，该插件应该在视频播放时计算每个ENTER_FRAME事件的帧速率。

我们正在第61行收听ENTER_FRAME事件。 api.addEventListener（Event.ENTER_FRAME，calculateFPS）;

每次输入新帧时，插件都会执行calculateFPS函数。帧速率显示在文本框中。

由于某种原因，计算的帧速率约为30 fps。这是不可能的，因为视频的原始帧速率是15 fps。我认为问题可能出在第61行，其中eventlistener正在监听播放器而不是视频。是否可以将eventlistener直接链接到视频？

这是整个插件动作脚本代码。它基于JW Player插件示例APITester.as。

package {
import com.longtailvideo.jwplayer.events.*;
import com.longtailvideo.jwplayer.player.*;
import com.longtailvideo.jwplayer.plugins.*;

import flash.display.DisplayObject;
import flash.display.Sprite;
import flash.events.MouseEvent;
import flash.text.TextField;
import flash.events.Event; 

import flash.utils.getTimer;

/** An example plugin that tests various player integrations. **/
public class APITester extends Sprite implements IPlugin6 {

    [Embed(source="mute.png")]
    private const MuteIcon:Class;

    private var api:IPlayer;
    private var field:TextField;

    private var clickButton:Sprite;

    public var startTime:Number;
    public var framesNumber:Number = 0;
    public var fps:TextField = new TextField();


    /** Let the player know what the name of your plugin is. **/
    public function get id():String {
        return "apitester";
    };

    public function get target():String {
        return "6.0";
    }


    /** Constructor **/
    public function APITester() {
        clickButton = new Sprite();
        clickButton.addChild(new MuteIcon());
        clickButton.y = 10;
        clickButton.buttonMode = true;
        addChild(clickButton);


         startTime = getTimer();
        addChild(fps);


    };


    /** Called by the player after the plugin has been created. **/
    public function initPlugin(player:IPlayer, config:PluginConfig):void {

        api = player;

        api.addEventListener(Event.ENTER_FRAME, calculateFPS); 

        api.play();



    };

    private function calculateFPS(evt:Event):void {

        var currentTime:Number = (getTimer() - startTime) / 1000;

        framesNumber++;

        if (currentTime > 1)
        {
            fps.text = "FPS: " + (Math.floor((framesNumber/currentTime)*10.0)/10.0);

            startTime = getTimer();
            framesNumber = 0;
        }   
    };

    /** If the player resizes itself, this gets called (including on setup). **/
    public function resize(wid:Number, hei:Number):void {
        clickButton.x = wid - 50;
    }
}

}

如何在客户端计算机上找出JW Player视频的帧率

0 个答案: