Microsoft KB Archive/919891

= FIX: Playback quality of a video from a multicast stream starts to decrease after approximately 20 seconds in Windows Media Player on a Windows CE 5.0-based device =

Article ID: 919891

Article Last Modified on 7/17/2006

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APPLIES TO


 * Microsoft Windows CE 5.0

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SYMPTOMS
Consider the following scenario. On a Microsoft Windows CE 5.0-based device, you view a video from a multicast stream in Microsoft Windows Media Player. In this scenario, playback quality starts to decrease approximately 20 seconds after Windows Media Player connects to the multicast stream.



CAUSE
This problem occurs because of a problem in how the average time to decode and display each video frame is calculated. This time determines how much memory the device must have to buffer the incoming data. The buffer size is adjusted every 20 to 40 seconds. Therefore, performance does not start to decrease until the first adjustment at 20 seconds.



Software update information
A supported software update is now available from Microsoft as Windows CE 5.0 Core OS QFE 919891. 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 do not have to 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.



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

Additional query words: media multicast stream performance

Keywords: kbbug kbfix kbhotfixserver kbqfe kbpubtypekc KB919891

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