csdn_文档中心_在中visual studio _net 2003利用directshow播放媒体文件(一).htm

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            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">文件，</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">AVI</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分离</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">将文件分离为音频流和视频流，</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">AVI</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">解码</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">对视频流进行解码并送往</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Video</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表现</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，由后者将各帧在显示器上显示，默认的</SPAN><SPAN 
            lang=EN-US><FONT 
            face="Times New Roman">DirectSound</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设备用</SPAN><SPAN 
            lang=EN-US><FONT 
            face="Times New Roman">DirectSound</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">将音频流输出。</SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">我们的应用并不需要对这当中的所以的数据流进行管理，在</SPAN><SPAN 
            lang=EN-US><FONT 
            face="Times New Roman">DirectShow</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">提供一个称做</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Graph</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">管理器的高级组件。在我们的应用中只需要调用它的</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">API</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">即可，如</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Run</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Stop</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等，如果你想对其中的数据流做更进一步的控制，你可以对这些</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">直接通过</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">COM</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">接口进行存取。</SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Graph</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">管理器同时也提供了另一个功能：应用程序可以通过管理器控制</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Graph</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如何生成。</SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN><FONT 
            face="Times New Roman">DirectShow</FONT>应用</SPAN><SPAN 
            lang=EN-US><o:p></o:p></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">从广义上说，所有的</SPAN><SPAN 
            lang=EN-US><FONT 
            face="Times New Roman">DirectShow</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">应用都必须完成三件事情，如下图</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">B</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所示：</SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><o:p><FONT 
            face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><o:p><FONT 
            face="Times New Roman">&nbsp;</FONT></o:p></SPAN></P>
            <P align=center class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"><SPAN 
            lang=EN-US><v:shape id=_x0000_i1028 
            style="HEIGHT: 146.25pt; WIDTH: 415.5pt" type="#_x0000_t75" 
            filled="t" fillcolor="silver" o:ole=""><IMG 
            src="CSDN_文档中心_在中Visual Studio _NET 2003利用DirectShow播放媒体文件(一).files/CSDN_Dev_Image_2004-4-102019482.emz" 
            o:title=""><FONT 
            face="Times New Roman"></FONT></v:shape></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">B</FONT></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo2; tab-stops: list 18.0pt"><SPAN 
            lang=EN-US style="mso-fareast-font-family: 'Times New Roman'"><SPAN 
            style="mso-list: Ignore"><FONT face="Times New Roman">1．<SPAN 
            style="FONT: 7pt 'Times New Roman'"><FONT size=3>&nbsp; 
            </FONT></SPAN></FONT></SPAN></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">生成</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Graph</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">管理器的一个实例。</SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo2; tab-stops: list 18.0pt"><SPAN 
            lang=EN-US style="mso-fareast-font-family: 'Times New Roman'"><SPAN 
            style="mso-list: Ignore"><FONT face="Times New Roman">2．<SPAN 
            style="FONT: 7pt 'Times New Roman'"><FONT size=3>&nbsp; 
            </FONT></SPAN></FONT></SPAN></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">利用</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Grapth</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">实例生成</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Graph</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，具体应该由哪些</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">组成</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Graph</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">视我们的应用的需要而定。</SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo2; tab-stops: list 18.0pt"><SPAN 
            lang=EN-US style="mso-fareast-font-family: 'Times New Roman'"><SPAN 
            style="mso-list: Ignore"><FONT face="Times New Roman">3．<SPAN 
            style="FONT: 7pt 'Times New Roman'"><FONT size=3>&nbsp; 
            </FONT></SPAN></FONT></SPAN></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通过对</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Graph</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">管理器的方法调用和来自</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Graph</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的消息的响应</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Graph</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和数据流进行控制。</SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt"><SPAN 
            lang=EN-US><FONT 
            face="Times New Roman">DirectShow</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是基于</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">COM</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的，</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter 
            Graph</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">管理器和</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Filter</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">都是</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">COM</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">对象</SPAN><FONT 
            face="Times New Roman"> </FONT><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，在开始着手之前你应该对</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">COM</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">有个基本的认识。</SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 18pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">下面让我们着手开始做一个简单的</SPAN><SPAN 
            lang=EN-US><FONT 
            face="Times New Roman">DirectShow</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">应用，在这个应用中我们实现这样的功能：打开一个媒体文件，并对其进行播放。</SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设置环境</SPAN><SPAN 
            lang=EN-US><o:p></o:p></SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在利用</SPAN><SPAN 
            lang=EN-US><FONT 
            face="Times New Roman">DirectShow</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">进行流媒体的处理之前，必须正确安装</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">DirectX</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">SDK</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">DirectX 
            SDK</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">可以到微软的网站上下载，目前，</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">DirectX</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">最新版本为</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">9.0</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</SPAN></P>
            <P class=MsoNormal 
            style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">本文将对</SPAN><SPAN 
            lang=EN-US><FONT 
            face="Times New Roman">DirectShow</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的应用进行入门级的应用。</SPAN></P>
            <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN 
            lang=EN-US><SPAN style="mso-tab-count: 1"><FONT 
            face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
            </FONT></SPAN></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在正确安装好</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">DirectX 
            SDK</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">后，我们必须设置</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">DirectX 
            SDK</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的头文件和库文件，使其在</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Visual 
            Studio</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的搜索路径内。对于</SPAN><SPAN 
            lang=EN-US><FONT face="Times New Roman">Visual Studio .NET 
            2003</FONT></SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">可如下进行设置：菜单</SPAN><SPAN 
            style="FONT-FAMILY: 宋体">→</SPAN><SPAN 
            style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">工具</SPAN><SPAN 
            style="FONT-FAMILY: 宋体">→选项→项目→<SPAN 
            lang=EN-US>VC++</SPAN>目录，在包含文件中加入<SPAN 
            lang=EN-US>D:\DXSDK\Include</SPAN>，在库文件中加入<SPAN 
            lang=EN-US>D:\DXSDK\lib(</SPAN>我的<SPAN