Use API Microsoft.Expression.Encoder.MediaItem in WCF Service which has been installed on IIS 6 Windows Server 2003

Question

In my WCF, I have to use MediaItem to get Informations of the media that I passed. When I install the service on IIS 7, it works well. But when I install it on IIS6(windows server 2003) for demo. It does not work and print the following message. By the way, I have installed the same version of Expression Encoder on the machine of IIS 7 and II6.

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
   <s:Body>
      <s:Fault>
         <faultcode xmlns:a="http://schemas.microsoft.com/net/2005/12/windowscommunicationfoundation/dispatcher">a:InternalServiceFault</faultcode>
         <faultstring xml:lang="fr-FR">Cannot find video codec: Wvc1</faultstring>
         <detail>
            <ExceptionDetail xmlns="http://schemas.datacontract.org/2004/07/System.ServiceModel" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
               <HelpLink i:nil="true"/>
               <InnerException>
                  <HelpLink i:nil="true"/>
                  <InnerException>
                     <HelpLink i:nil="true"/>
                     <InnerException i:nil="true"/>
                     <Message>Exception from HRESULT: 0x8004025D</Message>
                     <StackTrace>at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
   at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode)
   at ThrowHRESULT(Int32 hr)
   at MS.Internal.Expression.Encoder.Media.MediaFileInfo..ctor(String fileName)</StackTrace>
                     <Type>System.Runtime.InteropServices.COMException</Type>
                  </InnerException>
                  <Message>Exception from HRESULT: 0x8004025D</Message>
                  <StackTrace>at MS.Internal.Expression.Encoder.Media.MediaFileInfo..ctor(String fileName)
   at MS.Internal.Expression.Encoder.MediaImport.MediaInfoCache`1.CreateMediaFileInfoFromFile(String strFilename)
   at MS.Internal.Expression.Encoder.MediaImport.MediaInfoCache`1.OpenMediaFileInfo(String strFilename)
   at Microsoft.Expression.Encoder.MediaImportInfo.OpenMediaFileInfo(String strFilename)
   at Microsoft.Expression.Encoder.MediaImportInfo.OpenAndValidateMediaFile(String strFilename, MediaLoadOptions loadOptions)</StackTrace>
                  <Type>Microsoft.Expression.Encoder.UnableToAnalyzeFileException</Type>
               </InnerException>
               <Message>Cannot find video codec: Wvc1</Message>
               <StackTrace><![CDATA[at Microsoft.Expression.Encoder.MediaImportInfo.OpenAndValidateMediaFile(String strFilename, MediaLoadOptions loadOptions)
   at Microsoft.Expression.Encoder.MediaItem.Analyze(AudioVideoFile audioVideoFile)
   at Microsoft.Expression.Encoder.MediaItem.Analyze()
   at Microsoft.Expression.Encoder.MediaItem..ctor(String fileName)
   at BoodsServices.PlayerService.GetMediaItem(String source)
   at SyncInvokeGetMediaItem(Object , Object[] , Object[] )
   at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)
   at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage41(MessageRpc& rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc& rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc& rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3(MessageRpc& rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc& rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage11(MessageRpc& rpc)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc& rpc)
   at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)]]></StackTrace>
               <Type>Microsoft.Expression.Encoder.InvalidMediaFileException</Type>
            </ExceptionDetail>
         </detail>
      </s:Fault>
   </s:Body>
</s:Envelope>

Answer 1

Server 2003 is not supported by Expression Encoder 4 as it doesn't support its minimum requirements.

Answer 2

But it does work if I run a console application which use this class "MediaItem" in windows server 2003.

The example official could be found in the directory %Program Files%\Microsoft Expression\Encoder 4\SDK\Samples\MediaInfo

Could you explain me the reason, thanks.