Microsoft KB Archive/924605

= FIX: You may experience poor performance when you try to use Windows Media Player on a Windows CE 5.0-based computer that uses Microsoft DirectShow =

Article ID: 924605

Article Last Modified on 11/15/2007

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APPLIES TO


 * Microsoft Windows CE 5.0

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Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



SYMPTOMS
When you try to use Microsoft Windows Media Player on a Microsoft Windows CE 5.0-based computer that uses Microsoft DirectShow (Quartz.dll), you may experience poor performance.



CAUSE
This problem occurs because all the modules that DirectShow loads may be loaded into the same memory space as Quartz.dll.



RESOLUTION
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that this article describes. Apply this hotfix only to systems that are experiencing this specific problem.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
The following list contains prerequisites for the hotfix:
 * Windows CE 5.0

Restart requirement
You must restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix package has the file attributes (or later) that are listed in the following table.

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

After you apply this hotfix, you can configure DirectShow to use shared memory architecture for performance enhancement. To do this, original equipment manufacturers (OEM) must add or modify the following registry entries to the Platform.reg file:   [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectShow] &quot;UsingSharedMemory&quot;=dword:0 Note The default value for the UsingSharedMemory value is 0.   [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectShow] &quot;SharedMemoryThreshold&quot;=dword:4000 Note The SharedMemoryThreshold value is a hexadecimal value that represents the memory boundary at which Direct Show will start loading modules into shared memory. This value must be larger than 400. A value of 400 is equal to 1 KB. We recommend that you set this value to 4000. A value of 4000 is equal to 16 KB. 

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbhotfixserver kbexpertiseinter kbexpertiseadvanced kbfix kbqfe kbpubtypekc KB924605

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