Windows Media Encoder 9 crashes when you switch the input and output viewers and change resources repeatedly

When you switch the input viewers and the output viewers repeatedly in a Windows Media Encoder 9 encoder session, a heap corruption occurs. Additionally, the Encoder application crashes. This problem occurs if you switch between different sources when you switch the input viewers and the output viewers.

This problem occurs because the source pointer is not set to NULL when the display viewer changes from output to input. When you switch the source, the memory for the point may become invalid. When the memory is read or written, a heap corruption occurs.

Hotfix information

The following files are available for download from the Microsoft Download Center:

For x86-based versions
Download the 954069 package now. (http://download.microsoft.com/download/5/0/E/50E5E589-EBA9-4ED9-8E6C-2ED9122D9104/WindowsMedia11-KB954069-x86-INTL.exe)

For x64-based versions
Download the 954069 package now. (http://download.microsoft.com/download/5/0/E/50E5E589-EBA9-4ED9-8E6C-2ED9122D9104/WindowsMedia11-KB954069-x64-INTL.exe)

Prerequisites

You must have the Windows Media Format 11 SDK installed to apply this hotfix.

Restart requirement

You do not have to restart the 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 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.

For x86-based versions

For x64-based versions

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

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