我有一个要加载视频的 flvplayback 组件。
为了模仿下一帧和前一帧的动作，我为加载的每一秒的长度添加提示点。
下一帧/上一帧函数实现 seekToNextNavCuePoint 和seekToPrevNavCuePoint视频。
但它没有按我预期的方式工作。
这是实际的类文件。您可以使用库中包含按钮实例的 fla 文件直接编译它以进行播放暂停停止...此外，您还需要一些示例 flv 文件。
package
{
/*
The fla file contains buttons in the library;
*/
import flash.events.*;
import flash.display.*;
import fl.video.*;
public class testPlayer extends MovieClip
{
private var video1:FLVPlayback;
private var play_btn:PlayButton;
private var pause_btn:PauseButton;
private var stop_btn:StopButton;
private var nextFrame_btn:ForwardButton;
private var previousFrame_btn:ForwardButton;
public function testPlayer()
{
// constructor code
addEventListener(Event.ADDED_TO_STAGE,onAdded);
}
private function onAdded(event:Event)
{
setPlayer();
setPath();
setButtons();
}
private function setPlayer()
{
video1 = new FLVPlayback ;
this.addChild(video1);
video1.x = 50;
video1.y = 50;
}
private function setPath()
{
video1.addEventListener(VideoEvent.READY, flvPlayback_ready);
video1.addEventListener(MetadataEvent.CUE_POINT, flvPlayback_cuePoint);
// here you can give any flv you have and its total time
video1.load("test.flv",3600,false);
}
private function flvPlayback_ready(evt:VideoEvent):void
{
var num:Number = video1.totalTime;
for (var i:int=0; i<num; i++)
{
video1.addASCuePoint(i, "cuePoint"+String(i));
}
this.removeEventListener(VideoEvent.READY, flvPlayback_ready);
}
private function flvPlayback_cuePoint(evt:MetadataEvent):void
{
trace("CUE POINT!!!");
trace("\t", "name:", evt.info.name);// name: cuePoint1
trace("\t", "time:", evt.info.time);// time: 1
trace("\t", "type:", evt.info.type);// type: actionscript
}
private function setButtons()
{
play_btn=new PlayButton();
pause_btn=new PauseButton();
stop_btn=new StopButton();
nextFrame_btn=new ForwardButton();
previousFrame_btn=new ForwardButton();
play_btn.addEventListener(MouseEvent.CLICK,onPlay);
pause_btn.addEventListener(MouseEvent.CLICK,onPause);
stop_btn.addEventListener(MouseEvent.CLICK,onStop);
nextFrame_btn.addEventListener(MouseEvent.CLICK,onNextFrame);
previousFrame_btn.addEventListener(MouseEvent.CLICK,onPreviousFrame);
play_btn.x = 50;
play_btn.y = 350;
previousFrame_btn.x = 125;
previousFrame_btn.y = 350;
previousFrame_btn.scaleX *= -1;
nextFrame_btn.x = 150;
nextFrame_btn.y = 350;
pause_btn.x = 200;
pause_btn.y = 350;
stop_btn.x = 250;
stop_btn.y = 350;
addChild(play_btn);
addChild(pause_btn);
addChild(stop_btn);
addChild(previousFrame_btn);
addChild(nextFrame_btn);
}
private function onPlay(event:MouseEvent)
{
video1.play();
}
private function onPause(event:MouseEvent)
{
video1.pause();
}
private function onStop(event:MouseEvent)
{
video1.stop();
}
private function onNextFrame(event:Event)
{
if (video1.playing)
{
//video1.pause();
}
// this is not working the way i expected it to
video1.seekToNextNavCuePoint();
}
private function onPreviousFrame(event:Event)
{
if (video1.playing)
{
//video1.pause();
}
// this is not working the way i expected it to
video1.seekToPrevNavCuePoint();
}
}
}
我在这里想念什么？仅在不调用下一个/上一个帧函数的情况下运行它表明提示点每秒钟都根据 flvPlayback_cuePoint 函数被激活。
update:
当我单击previousFrame按钮时，无论当前提示点在哪里，帧都会转移到 cuepoint1 。当我单击nextFrame按钮时，提示点和显示似乎更改为下一个，但单击几下后提示点立即更改为 1，并且视频从头开始。
问题 1：在 ActionScript 3.0 中使用addASCuePoint() 沿加载的影片长度动态添加提示点的正确方法是什么？
问题 2： 我们可以以 33ms 的间隔添加提示点，我们可以正确地寻找吗？
问题3：上面的代码有什么问题？
更新：添加赏金：解决问题和 3 个问题的答案
更新：
经过多次不成功的上述方法试验并尝试了 Trevor 的建议。我通过 seek() 方法获得了功能，但精度相当低。
package
{
/*
The fla file contains buttons in the library;
*/
import flash.events.*;
import flash.display.*;
import fl.video.*;
public class testPlayer extends MovieClip
{
private var video1:FLVPlayback;
private var play_btn:PlayButton;
private var pause_btn:PauseButton;
private var stop_btn:StopButton;
private var nextFrame_btn:ForwardButton;
private var previousFrame_btn:ForwardButton;
private var playHeadTime:Number;
private var cue:Object;
public function testPlayer()
{
addEventListener(Event.ADDED_TO_STAGE,onAdded);
}
private function onAdded(event:Event)
{
setPlayer();
setPath();
setButtons();
playHeadTime = 0;
}
private function setPlayer()
{
video1 = new FLVPlayback ;
this.addChild(video1);
video1.x = 50;
video1.y = 50;
}
private function setPath()
{
video1.playheadUpdateInterval = 50;
video1.seekToPrevOffset = 0.01;
video1.addEventListener(VideoEvent.READY, flvPlayback_ready);
video1.addEventListener(MetadataEvent.CUE_POINT, flvPlayback_cuePoint);
video1.load("test.flv",3600,false);
}
private function flvPlayback_ready(evt:VideoEvent):void
{
// changing this loop to add more cue points causes the program to hang.
for (var i:int=0; i<video1.totalTime; i++)
{
cue= new Object();
cue.time = i;
cue.type = "navigation";// this does not seem to get set the type
cue.name = "cuePoint" + String(i);
video1.addASCuePoint(cue,cue.name);
}
video1.removeEventListener(VideoEvent.READY, flvPlayback_ready);
}
private function flvPlayback_cuePoint(evt:MetadataEvent):void
{
trace("CUE POINT!!!");
trace("\t", "name:", evt.info.name);// name: cuePoint1
trace("\t", "time:", evt.info.time ," playhead time :",String(Math.round(video1.playheadTime)));// time: 1
trace("\t", "====type:", evt.info.type);// traces actionscript instead of navigation
}
private function setButtons()
{
play_btn=new PlayButton();
pause_btn=new PauseButton();
stop_btn=new StopButton();
nextFrame_btn=new ForwardButton();
previousFrame_btn=new ForwardButton();
play_btn.addEventListener(MouseEvent.CLICK,onPlay);
pause_btn.addEventListener(MouseEvent.CLICK,onPause);
stop_btn.addEventListener(MouseEvent.CLICK,onStop);
nextFrame_btn.addEventListener(MouseEvent.CLICK,onNextFrame);
previousFrame_btn.addEventListener(MouseEvent.CLICK,onPreviousFrame);
play_btn.x = 50;
play_btn.y = 350;
previousFrame_btn.x = 125;
previousFrame_btn.y = 350;
previousFrame_btn.scaleX *= -1;
nextFrame_btn.x = 150;
nextFrame_btn.y = 350;
pause_btn.x = 200;
pause_btn.y = 350;
stop_btn.x = 250;
stop_btn.y = 350;
addChild(play_btn);
addChild(pause_btn);
addChild(stop_btn);
addChild(previousFrame_btn);
addChild(nextFrame_btn);
}
private function onPlay(event:MouseEvent)
{
video1.play();
}
private function onPause(event:MouseEvent)
{
video1.pause();
}
private function onStop(event:MouseEvent)
{
video1.stop();
}
private function onNextFrame(event:Event)
{
if (video1.playing)
{
video1.stop();
}
trace("Calling nextFrame :::",playHeadTime);
video1.seek(playHeadTime);
playHeadTime += 1;
}
private function onPreviousFrame(event:Event)
{
if (video1.playing)
{
video1.stop();
}
trace("Calling prevFrame ::::",playHeadTime);
video1.seek(playHeadTime);
playHeadTime -= 1;
}
}
}
以下跟踪的输出如下所示。问题是下一个和上一个函数不断跳过提示点，并且似乎在某些提示点不起作用。下面的痕迹应该给出清晰的画面。
Calling nextFrame ::: 0
CUE POINT!!!
name: cuePoint0
time: 0 playhead time : 0
====type: actionscript
Calling nextFrame ::: 1
CUE POINT!!!
name: cuePoint2
time: 2 playhead time : 2
====type: actionscript
Calling nextFrame ::: 2
Calling nextFrame ::: 3
CUE POINT!!!
name: cuePoint4
time: 4 playhead time : 4
====type: actionscript
Calling prevFrame :::: 4
Calling prevFrame :::: 3
Calling prevFrame :::: 2
CUE POINT!!!
name: cuePoint2
time: 2 playhead time : 2
====type: actionscript
编辑：
- 问题 1：我们如何在连续提示点上触发 MetadataEvent.CUE_POINT，即不跳过提示点。
- 问题 2：我们如何在每个提示点触发 MetadataEvent.CUE_POINT 事件，当它们以 100 毫秒的间隔说。