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A hotfix is available that fixes certain media playback problems on a Windows Vista-based computerArticle ID: 956554 - View products that this article applies to. On This PageSYMPTOMSOn
a Windows Vista-based computer, you may experience the following media playback problems. Problem 1When you play some MPEG-2 videos in a multimedia application, the application crashes if it starts multiple instances of the MPEG-2 decoder at the same time. For example, this problem typically occurs when you play multiple MPEG-2 videos in a playlist. When you do this, the application crashes when one video ends and the next video starts.Problem 2Consider the following scenario:
These problems occur only on computers that have certain graphics hardware installed. CAUSECause of problem 1When you play back certain video formats by using hardware decode acceleration, this requires proprietary encryption libraries that are compiled into the MPEG-2 video decoder. However, when multiple instances of the MPEG-2 decoder in the same process try to access the encryption library at the same time, a driver crash is likely to occur.Cause of problem 2This problem occurs because the content protection functionality of certain graphics hardware may be unable to determine which graphics processing unit is being used.RESOLUTIONHotfix informationA supported hotfix is 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 software update that contains this hotfix.If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix. Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: http://support.microsoft.com/contactus/?ws=support Note The "Hotfix download available" form displays the languages for
which the hotfix is available. If you do not see your language, it is because a
hotfix is not available for that language.
(http://support.microsoft.com/contactus/?ws=support)
PrerequisitesTo apply this hotfix on a Windows Vista-based computer, you must have Windows Vista Service Pack 1 (SP1) installed.For more information, click the following article number to view the article in the Microsoft Knowledge Base: 935791
(http://support.microsoft.com/kb/935791/
)
How to obtain the latest Windows Vista service pack
Restart requirementTo avoid restarting the computer, make sure that no multimedia application is running when you apply this hotfix.Hotfix replacement informationThis hotfix does not replace any other hotfixes.File informationThe 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 file information notes
For all supported x86-based versions of Windows VistaCollapse this table
For all supported x64-based versions of Windows VistaCollapse this table
Additional file information for Windows Server 2008Additional files for all supported x86-based versions of Windows Server 2008 and of Windows VistaCollapse this table
Additional files for all supported x64-based versions of Windows Server 2008 and of Windows VistaCollapse this table
STATUSMicrosoft
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section. MORE INFORMATIONFor more information about
software update terminology, click the following article number to view the
article in the Microsoft Knowledge Base: 824684
(http://support.microsoft.com/kb/824684/LN/
)
Description of the standard terminology that is used to describe Microsoft software updatesPropertiesArticle ID: 956554 - Last Review: October 8, 2011 - Revision: 2.0 APPLIES TO
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