一边播放RM文件一边播放相应的PPT文件编程实现

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一边播放RM文件一边播放相应的PPT文件编程实现
java

一边播放RM文件一边播放相应的PPT文件编程实现 java 工作

应用情景： 在制作网络课件的过程中，可能会遇到这种情况，就是需要在一个视频播放网页中，一边播放RM视频文件，一边显示相应的PowerPoint文件，并且PPT文件随着视频的播放自动进行翻页。

代码原理： Realplayer提供的相应的编程接口，可以获取其播放时间。将PPT文件做成多个图片，根据获取的播放时间，对所显示的图片文件进行调整。

代码片断如下：

<html> <head> <meta http-equiv="content-type" content="text/html; charset=gb2312"> <meta http-equiv="imagetoolbar" content="no">

<script language="JScript"> <--

T_lit=new Array(0,7,36,43,71); I_lit=new Array("1.jpg","2.jpg","3.jpg","4.jpg","5.jpg"); PageLit=new Array("欢迎您观看课程视频文件。","根据网络情况，可能缓冲时间会比较长。请耐心等待。","如果不能播放，请查看学习帮助。"); PageUrl=new Array("help.htm","help.htm","help.htm"); PageRm="rm/堆排序.rm"; PageSo=1; title="数据结构"; PlayStr=0; function window.onload(){ PlayTime(); CourseEvent(); Player.setvolume(70); li.src="pimg/heapsort/"+I_lit[0]; lw[PageSo-1].style.color="#ffffff"; setTimeout("Player.setsource(PageRm);DisPlayDiv()",1000); setInterval("timetd.innerText=WriteTime(Player.GetPosition())+/"//"+WriteTime(Player.getlength())",300); setTimeout(scanTime,5000); } function document.onclick(){ with(event.srcElement)if(tagName=="A"||tagName=="IMG")blur(); } function document.oncontextmenu(){ return false; } function document.onselectstart(){ return false; } function document.onkeydown(){ return false; }

function PlayTime(){ if(parseInt(Player.getposition()/1000)==T_lit[PlayStr+1]){ li.src="pimg/heapsort/"+I_lit[PlayStr+1]; PlayStr+=1; ChkButton(); } }

function GoTo(no){ Player.dopause(); Player.setposition(T_lit.length>1?T_lit[no]*1000:0); li.src="pimg/heapsort/"+I_lit[no]; PlayStr=no; ChkButton(); Player.doplay(); } function EventPlay(e){ var t=""; if(e=="play"){ t=0; Player.doplay(); } if(e=="pause"){ t=1; Player.dopause(); } if(e=="stop"){ t=2; GoTo(0); Player.dostop(); backbox.src=backbox.dsrc; } t==0||t==1?new function(){for(i=0;i<pps.length;i++)pps[i].src=pps[i].isrc,pps[t].src=pps[t].dsrc}:new function(){for(i=0;i<pps.length;i++)pps[i].src=pps[i].ssrc;pps[0].src=pps[0].isrc} } var EventObject=0,Old_X,New_X; function Button_Down(){ EventObject=event.srcElement; Old_X=event.clientX; EventObject.setCapture(); EventPlay("pause"); clearInterval(sinterval); } function Button_Move(){ if(EventObject){ New_X=event.clientX; var MovePels=EventObject.style.pixelLeft+New_X-Old_X; var MaxBound=document.all(EventObject.id+"Box").offsetWidth-EventObject.offsetWidth; if(EventObject&&MovePels<=MaxBound&&MovePels>=0){ EventObject.style.pixelLeft=MovePels; eval(EventObject.id+"Event("+EventObject.style.pixelLeft+","+MaxBound+")"); Old_X=New_X; } } } function Button_Up(){ if(EventObject){ EventObject.releaseCapture(); EventObject=0; CourseEvent(); ChangeEvent(); ChkButton(); } } function CourseButtonEvent(l,m){ Player.setposition(Math.round(Player.getlength()*l/m)); } function VolumeButtonEvent(l,m){ Player.setvolume(Math.round((l/m)*100)); } function ChangeEvent(){ var ReturnPos=""; var sNo=Player.getposition()/1000; for(i=T_lit.length;i>0;i--)if(T_lit[i]>sNo)ReturnPos=i; sPlay(ReturnPos); } function sPlay(n){ n==""?n=I_lit.length:null; li.src="pimg/heapsort/"+I_lit[n-1]; PlayStr=n-1; EventPlay("play"); } function WriteTime(p){ var secend=p; var minute=parseInt(secend/60000).toString(); var secend=parseInt((secend-minute*60000)/1000).toString(); minute=minute.length==1?0+minute:minute; secend=secend.length==1?0+secend:secend; return minute+":"+secend; } function BackButton(){ PlayStr>0?new function(){GoTo(PlayStr-1);nextbox.src=nextbox.ssrc}:null; } function NextButton(){ if(PlayStr<T_lit.length-1){ GoTo(PlayStr+1); backbox.src=backbox.ssrc; } } function ChkButton(){ if(PlayStr==0)backbox.src=backbox.dsrc,nextbox.src=nextbox.ssrc; if(PlayStr==I_lit.length-1)backbox.src=backbox.ssrc,nextbox.src=nextbox.dsrc; if(PlayStr<I_lit.length-1&&PlayStr>0)backbox.src=backbox.ssrc,nextbox.src=nextbox.ssrc; } function scanTime(){ Player.getplaystate()==3&&Player.getposition()==Player.getlength()&&PageSo!=PageUrl.length?location=PageUrl[PageSo]:setTimeout(scanTime,50); } function DisPlayDiv(){ Player.getplaystate()==3?LoadBr.style.display="none":setTimeout(DisPlayDiv,20); } function CourseEvent(){ sinterval=setInterval("CourseButton.style.pixelLeft=Math.round((CourseButtonBox.offsetWidth-CourseButton.offsetWidth)*Player.getposition()/Player.getlength());PlayTime()",300); }

function MoveTextDiv(obj,action){ function UpMove(){ if(TextScroll.offsetTop<0){ TextScroll.style.pixelTop+=1; } obj.src="image/up_d.gif"; } function DownMove(){ if(TextScroll.offsetTop>(TextScrollBox.offsetHeight-TextScroll.offsetHeight)){ TextScroll.style.pixelTop-=1; } obj.src="image/down_d.gif"; } scro=setInterval(action=="up"?UpMove:DownMove,10); function obj.onmouseout(){ clearInterval(scro); obj.src=action=="up"?"image/up_o.gif":"image/down_o.gif"; } } --> </script>

<title>test</title> </head> <body leftmargin="0" topmargin="0" rightmargin="0" bottommargin="0" scroll="no"> <table border="0" cellpadding="0" cellspacing="0" width="760"> <tr> <script language="JScript">  </script> </tr> <tr> <td colspan="13"><img src="image/i_07.jpg" width="282" height="16" border="0" ></td> <td colspan="7"><img src="image/i_08.jpg" width="478" height="16" border="0" ></td> <td style="width:1;height:16"></td> </tr> <tr> <td rowspan="10"><img src="image/i_09.jpg" width="21" height="394" border="0" ></td> <td colspan="10" align="center" background="image/i_13.jpg" style="width:237;height:17;color:#003399"></td> <td rowspan="4" colspan="2"><img src="image/i_10.jpg" width="24" height="221" border="0" ></td> <td height="374" rowspan="7" >　</td> <td rowspan="7" colspan="5" >　</td> <td rowspan="11"><img src="image/i_14.jpg" width="16" height="414" border="0" ></td> <td style="width:1;height:17"></td> </tr> <tr> <td colspan="10" bgcolor="#000000"> <object id="Player" classid="clsid:cfcdaa03-8be4-11cf-b84b-0020afbbccfa" width=237 height=178> <param name="controls" value="imagewindow"> <param name="autostart" value="-1"> <param name="SHUFFLE" value="0"> <param name="PREFETCH" value="0"> <param name="NOLABELS" value="0"> <param name="LOOP" value="0"> <param name="NUMLOOP" value="0"> <param name="CENTER" value="0"> <param name="MAINTAINASPECT" value="0"> <param name="BACKGROUNDCOLOR" value="#000000"> </object> </td> <td style="width:1;height:178"></td> </tr> <tr> <td colspan="5" bgcolor="#333333">　</td> <td colspan="5" bgcolor="#333333" style="color:#ffffff" id="timetd"></td> <td style="width:1;height:16"></td> </tr> <tr> <td><img src="image/i_16.jpg" width="15" height="10" border="0" ></td> <td colspan="7" background="image/i_17.jpg" id="CourseButtonBox"><img src="image/v_b.gif" width="10" height="10" id="CourseButton" style="position:relative;left:0" onmousedown="Button_Down()" onmousemove="Button_Move()" onmouseup="Button_Up()"></td> <td colspan="2"><img src="image/i_15.jpg" width="12" height="10" border="0" ></td> <td style="width:1;height:10"></td> </tr> <tr> <td colspan="12"><img src="image/i_18.jpg" width="261" height="5" border="0" ></td> <td style="width:1;height:5"></td> </tr> <tr> <td colspan="2"><img src="image/play_d.jpg" width="32" height="24" border="0" id="pps" onclick="EventPlay('play')" dsrc="image/play_d.jpg" isrc="image/play_i.jpg" ssrc="image/play_s.jpg" style="cursor:hand"></td> <td><img src="image/pause_i.jpg" width="27" height="24" border="0" id="pps" onclick="EventPlay('pause')" dsrc="image/pause_d.jpg" isrc="image/pause_i.jpg" ssrc="image/pause_s.jpg" style="cursor:hand"></td> <td><img src="image/stop_i.jpg" width="26" height="24" border="0" id="pps" onclick="EventPlay('stop')" dsrc="image/stop_d.jpg" isrc="image/stop_i.jpg" ssrc="image/stop_s.jpg" style="cursor:hand"></td> <td colspan="2" background="image/i_20.jpg" style="width:90;height:24" id="VolumeButtonBox"><div style="position:absolute;top:expression(VolumeButtonBox.offsetTop+3);left:expression(VolumeButtonBox.offsetLeft+3);background:url(image/vos.gif);width:expression(VolumeButton.style.pixelLeft+5);height:15"></div> <a id="VolumeButton" style="position:relative;left:70;top:-3;width:10" onmousedown="Button_Down()" onmousemove="Button_Move()" onmouseup="Button_Up()"> </a></td> <td><img src="image/i_21.jpg" width="42" height="24" border="0" ></td> <td colspan="4"><img src="image/u_s.jpg" style="cursor:hand" width="25" height="24" border="0" onclick="Player.setmute(!Player.getmute())" onmouseover="src='image/u_d.jpg'" onmouseout="!Player.getmute()?src='image/u_s.jpg':null"></td> <td><img src="image/i_19.jpg" width="19" height="24" border="0" ></td> <td style="width:1;height:24"></td> </tr> <tr> <td colspan="9" rowspan="4" valign="bottom " align="center" background="image/i_24.jpg" style="color:#ffffff"> <div style="width:220;height:130;overflow:hidden" id="TextScrollBox"> <div style="position:relative;top:0" id="TextScroll"> <script> for(i=0;i<PageLit.length;i++){ document.write("<table style=/"width:100%/"><tr><td width=/"10/" valign=/"top/"><img src=/"image/t_ico.gif/" width=/"13/" height=/"12/"></td><td><a href=/""+PageUrl[i]+"/" target=/"_blank/" id=/"lw/">"+PageLit[i]+"</a></td></tr></table>") } </script> </div> </div> <img style="position:absolute;top:378;left:256" src="image/up_o.gif" onmouseover="MoveTextDiv(this,'up')"> <img style="position:absolute;top:394;left:256" src="image/down_o.gif" onmouseover="MoveTextDiv(this,'down')"> </td> <td rowspan="4" colspan="3"><img src="image/i_23.jpg" width="26" height="144" border="0" ></td> <td style="width:1;height:124"></td> </tr> <tr> <td><img src="image/i_11.jpg" width="235" height="7"></td> <td rowspan="2"><img src="image/i_5F25.jpg" width="47" height="18" border="0" ></td> <td rowspan="2"><img src="image/back_d.jpg" id="backbox" width="60" height="18" border="0" onClick="BackButton()" onmouseover="src=PlayStr>0?isrc:dsrc" onmouseout="src=PlayStr>0?ssrc:dsrc" dsrc="image/back_d.jpg" isrc="image/back_i.jpg" ssrc="image/back_s.jpg" style="cursor:hand"></td> <td rowspan="2"><img src="image/i_26.jpg" width="34" height="18" border="0" ></td> <td rowspan="2"><img src="image/next_s.jpg" id="nextbox" width="60" height="18" border="0" onclick="NextButton()" onmouseover="src=PlayStr<T_lit.length-1?isrc:dsrc" onmouseout="src=PlayStr<T_lit.length-1?ssrc:dsrc" dsrc="image/next_d.jpg" isrc="image/next_i.jpg" ssrc="image/next_s.jpg" style="cursor:hand"></td> <td rowspan="2"><img src="image/i_27.jpg" width="26" height="18" border="0" ></td> <td style="width:1;height:7"></td> </tr> <tr> <td><img src="image/i_01.jpg" width="235" height="11" border="0" ></td> <td style="width:1;height:11"></td> </tr> <tr> <td rowspan="2" colspan="3"><img src="image/i_02.jpg" width="342" height="22" border="0" ></td> <td rowspan="2"><img src="image/i_03.jpg" width="34" height="22" border="0" ></td> <td rowspan="2"><img src="image/i_04.jpg" width="60" height="22" border="0" ></td> <td rowspan="2"><img src="image/i_05.jpg" width="26" height="22" border="0" ></td> <td style="width:1;height:2"></td> </tr> <tr> <td colspan="13"><img src="image/i_06.jpg" width="282" height="20" border="0" ></td> <td style="width:1;height:20"></td> </tr> </table> <img id="li" style="position:absolute;top:17;left:281;width:463;height:374"> <div id="LoadBr"><div style="position:absolute;top:0;left:0;width:760;height:430;background:black;filter:Alpha(Opacity=50)"></div><embed src="image/loading.swf" style="position:absolute;top:180;left:280"quality=high wmode=transparent width=200 height=150 type=application/x-shockwave-flash></embed></div> </body> </html>

 一些说明： 程序的总体概念比较清晰，不必多说。下面说一点细节问题。 T_lit=new Array(0,7,36,43,71) PPT切换时刻的RM视频播放时间，单位为秒。 I_lit=new Array("1.jpg","2.jpg","3.jpg","4.jpg","5.jpg") PPT文件做成图片后的名称。 PageLit=new Array() 页面上显示的多行信息文本。 PageUrl=new Array() 点击信息文本后导航到的网页文件。 PageRm="rm/堆排序.rm" 视频文件所在位置。 <object id="Player" classid="clsid:cfcdaa03-8be4-11cf-b84b-0020afbbccfa" width=237 height=178> <param name="controls" value="imagewindow"> <param name="autostart" value="-1"> <param name="SHUFFLE" value="0"> <param name="PREFETCH" value="0"> <param name="NOLABELS" value="0"> <param name="LOOP" value="0"> <param name="NUMLOOP" value="0"> <param name="CENTER" value="0"> <param name="MAINTAINASPECT" value="0"> <param name="BACKGROUNDCOLOR" value="#000000"> </object> 此为网页中插入Realplayer插件的代码。 其中值得注意的是将其命名为Player。在其它一些代码中可以看到，很多地方都用到了Player，比如Player.getposition()，Player.setposition()，Player.doplay()等等，这些都是Realplayer提供的相应的编程接口函数，从其函数名称已经可以看出函数的用途。其它一些代码都是围绕这些接口函数展开的。

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