Consider the following scenario:

•	You use Windows Media Center to watch high-definition television (HDTV) on a Windows Vista-based computer.
•	You have installed hotfix 932698 on the computer.
•	You do one of the following: • You switch the HDTV format between the 1080i format and the 720p format. • You open a different DVR-MS file. • You change the live TV programming to a different high-definition channel or to a different standard-definition channel.

In this scenario, the TV screen may appear as solid green, or it may appear as blocky pixels. This behavior continues until the next key frame is displayed.

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This issue occurs because the Microsoft MPEG2 decoder does not correctly flush the previous key frames.

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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: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:

Prerequisites

No prerequisites are required.

Restart requirement

You do not have to restart the computer after you apply this 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, x86-based versions

File name	File version	File size	Date	Time	Platform
X86_d39af18e3a88958fdca1439215ccdda7_31bf3856ad364e35_6.0.6000.20699_none_94c5ec71606373cd.manifest	Not Applicable	699	12-Oct-2007	14:47	Not Applicable
X86_microsoft-windows-msmpeg2vdec_31bf3856ad364e35_6.0.6000.20699_none_8f425452d439f8ff.manifest	Not Applicable	15,986	12-Oct-2007	14:47	Not Applicable
Msmpeg2vdec-ppdlic.xrm-ms	Not Applicable	3,053	12-Oct-2007	02:44	Not Applicable
Msmpeg2vdec.dll	11.0.6000.6344	584,704	12-Oct-2007	03:07	x86

Windows Vista, 64-bit versions

File name	File version	File size	Date	Time	Platform
Amd64_e268a1cf34a970ce450089e6f8b7cc8f_31bf3856ad364e35_6.0.6000.20699_none_f32b98c43c39bee1.manifest	Not Applicable	1,046	12-Oct-2007	14:47	Not Applicable
Amd64_microsoft-windows-msmpeg2vdec_31bf3856ad364e35_6.0.6000.20699_none_eb60efd68c976a35.manifest	Not Applicable	16,010	12-Oct-2007	14:54	Not Applicable
X86_microsoft-windows-msmpeg2vdec_31bf3856ad364e35_6.0.6000.20699_none_8f425452d439f8ff.manifest	Not Applicable	15,986	12-Oct-2007	14:54	Not Applicable
Msmpeg2vdec-ppdlic.xrm-ms	Not Applicable	3,053	12-Oct-2007	03:55	Not Applicable
Msmpeg2vdec.dll	11.0.6000.6344	725,504	12-Oct-2007	04:02	x64
Msmpeg2vdec-ppdlic.xrm-ms	Not Applicable	3,053	12-Oct-2007	02:44	Not Applicable
Msmpeg2vdec.dll	11.0.6000.6344	584,704	12-Oct-2007	03:07	x86

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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For more information about key frames, click the following article number to view the article in the Microsoft Knowledge Base: HDTV programs are encoded by using certain formats, such as 720p and 1080i. The numeric value in the format reference refers to the number of lines that are embedded in the TV signal. The letter refers to the type of scan that the television uses to display the picture. The letter "i" means interlaced, and the letter "p" means progressive.

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