Microsoft KB Archive/945125

= The preview function does not work correctly in Windows Movie Maker on a Windows Vista-based computer =

Article ID: 945125

Article Last Modified on 12/7/2007

-

APPLIES TO


 * Windows Vista Business
 * Windows Vista Enterprise
 * Windows Vista Home Basic
 * Windows Vista Home Premium
 * Windows Vista Starter
 * Windows Vista Ultimate
 * Windows Vista Business 64-bit Edition
 * Windows Vista Enterprise 64-bit Edition
 * Windows Vista Home Basic 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition

-



SYMPTOMS
Consider the following scenario:
 * You are using a Windows Vista-based computer that is running software graphics drivers for certain Intel chipsets.
 * You import some .wmv video files into the content pane of Windows Movie Maker on the computer.
 * You convert these .wmv video files to .avi video files by using Windows Movie Maker.
 * You add some .avi video files in the Storeboard area of Windows Movie Maker.
 * You drag a transition template into the Storeboard area.

In this scenario, the Storeboard area cannot be displayed. Additionally, if you click Play to preview the video, the preview function does not work.

Note If you remove the transition template from the Storeboard area, the Storeboard area is displayed correctly.



CAUSE
This issue occurs because of a floating-point precision problem in the Direct3D program. The precision problem is caused by the D3DCREATE_FPU_PRESERVE flag.

This issue typically occurs on computers that are running the following chipsets:
 * Intel G35 Express Chipset
 * Intel Q35 Express Chipset
 * Intel Q33 Express Chipset
 * Intel G33 Express Chipset
 * Intel G31 Express Chipset
 * Intel Q965 Express Chipset
 * Intel Q963 Express Chipset
 * Intel G965 Express Chipset
 * Intel 946GZ Express Chipset
 * Intel 945G Express Chipset
 * Intel 945GT Express Chipset
 * Intel 945GC Express Chipset
 * Intel 945GZ Express Chipset Mobile
 * Intel GM965 Express Chipset Mobile
 * Intel 945GM Express Chipset Mobile
 * Intel 945GMS Express Chipset Mobile
 * Intel GL960 Express Chipset Mobile
 * Intel 943GML Express Chipset Mobile
 * Intel 940GML Express Chipset Mobile
 * Intel 945GU Express Chipset



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

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
No prerequisites are required.

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace a previously released hotfix.

File information
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.

Windows Vista, 64-bit versions


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
For more information about Windows Movie Maker in Windows Vista, visit the following Microsoft Web site:

http://windowshelp.microsoft.com/Windows/en-US/Help/ec3fff68-e53c-4168-ae74-8557325e57e21033.mspx

If you do not specify the D3DCREATE_FPU_PRESERVE flag, the Direct3D program uses &quot;single-precision, round-to-nearest mode&quot; for the following reasons:
 * Double precision mode reduces the performance of the Direct3D program.
 * Parts of the Direct3D program assume that floating-point unit exceptions are masked. Unmasking these exceptions may cause unpredictable behavior.

For more information about the D3DCREATE_FPU_PRESERVE flag, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/library/bb172527.aspx

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Keywords: kbqfe kbexpertisebeginner kbhotfixserver KB945125

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.