Microsoft KB Archive/920271

= FIX: The Overlay Mixer filter in Windows CE 5.0 does not honor time stamps for video playback. =

Article ID: 920271

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Windows CE 5.0

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SYMPTOMS
The Overlay Mixer filter in Microsoft Windows CE 5.0 does not honor time stamps for video playback. When you play back video through the Overlay Mixer filter, the video plays through as quickly as it is decoded. Therefore, the video appears to be in fast forward mode.



CAUSE
This problem occurs when the cBuffers property is set to 1. When the cBuffers property is set to 1, synchronization with the reference clock occurs during the call to the IMemAllocator::GetBuffer method and not the IMemInputPin::Receive method. The GetBuffer method cannot access an initialized IMediaSample property. The GetBuffer method uses the pStartTime property that is passed to the GetBuffer method when it calls the IReferenceClock::AdviseTime method. Therefore, the GetBuffer method is passed an incorrect time stamp value.



Software update information
A supported software update is now available from Microsoft as Windows CE 5.0 Platform Builder Monthly Update (September 2006). You can confirm this by scrolling to the &quot;File information&quot; section of this article. The package file name contains the product version, date, Knowledge Base article number, and processor type. The package file name format is:

Product version-yymmdd-kbnnnnnn-processor type

For example: Wincepb50-060503-kb917590-armv4i.msi is the ARMV4i Windows CE 5.0 Platform Builder fix that is documented in KB article 917590 and that is contained in the May 2006 monthly update. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392 How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Prerequisites
This software update is supported only if all previously issued software updates for this product have also been applied.

Restart requirement
After you apply this software update, you must perform a clean build of the whole platform. To clean the platform, click Clean on the Build menu. To build the platform, click Build Platform on the Build menu. You must restart the computer after you apply this software update.

Software update replacement information
This software update does not replace any other software updates.

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

The English version of this software update 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.



To work around this problem, use the Video Renderer filter instead of the Overlay Mixer filter for video playback.



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

Keywords: kbpubtypekc kbqfe kbhotfixserver kbfix kbbug KB920271

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