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Microsoft KB Archive/925039

From BetaArchive Wiki

Article ID: 925039

Article Last Modified on 11/8/2006


  • Microsoft Windows CE .NET 4.2


Consider the following scenario. On a Microsoft Windows CE .NET 4.2-based device, you use Microsoft DirectShow to play an MP3 file. During playback, another application starts a thread that has a higher priority than DirectShow. In this scenario, you may hear noise during playback.


This problem occurs when the MP3 decoder file buffer is not large enough.


Software update information

A supported software update is now available from Microsoft as Windows CE .NET 4.2 Platform Builder Monthly Update (October 2006). You can confirm this by scrolling to the "File information" 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


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.

File name File size Date Time
Wincepb42-061006-kb925039-armv4.msi 7,628,800 06-Oct-2006 22:42
Wincepb42-061006-kb925039-armv4i.msi 7,628,800 06-Oct-2006 22:42
Wincepb42-061006-kb925039-mipsii.msi 7,446,016 06-Oct-2006 22:42
Wincepb42-061006-kb925039-mipsii_fp.msi 7,446,528 06-Oct-2006 22:42
Wincepb42-061006-kb925039-mipsiv.msi 7,447,552 06-Oct-2006 22:42
Wincepb42-061006-kb925039-mipsiv_fp.msi 7,448,064 06-Oct-2006 22:42
Wincepb42-061006-kb925039-sh3.msi 7,440,896 06-Oct-2006 22:42
Wincepb42-061006-kb925039-sh4.msi 7,440,896 06-Oct-2006 22:42
Wincepb42-061006-kb925039-x86.msi 7,430,144 06-Oct-2006 22:42

The English version of this software update package 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.

File name File size Date Time Path
Mp3dmod.lib 182,734 23-Sep-2006 00:52 public\directx\oak\lib\armv4\debug
Mp3dmod_xscale.lib 245,774 23-Sep-2006 00:52 public\directx\oak\lib\armv4\debug
Mp3dmod.lib 106,212 23-Sep-2006 00:52 public\directx\oak\lib\armv4\retail
Mp3dmod_xscale.lib 164,834 23-Sep-2006 00:52 public\directx\oak\lib\armv4\retail
Mp3dmod.lib 183,074 23-Sep-2006 00:52 public\directx\oak\lib\armv4i\debug
Mp3dmod_xscale.lib 246,128 23-Sep-2006 00:52 public\directx\oak\lib\armv4i\debug
Mp3dmod.lib 106,472 23-Sep-2006 00:52 public\directx\oak\lib\armv4i\retail
Mp3dmod_xscale.lib 165,120 23-Sep-2006 00:52 public\directx\oak\lib\armv4i\retail
Mp3dmod.lib 185,724 23-Sep-2006 00:53 public\directx\oak\lib\mipsii\debug
Mp3dmod.lib 109,228 23-Sep-2006 00:52 public\directx\oak\lib\mipsii\retail
Mp3dmod.lib 186,130 23-Sep-2006 00:53 public\directx\oak\lib\mipsii_fp\debug
Mp3dmod.lib 109,532 23-Sep-2006 00:53 public\directx\oak\lib\mipsii_fp\retail
Mp3dmod.lib 188,838 23-Sep-2006 00:53 public\directx\oak\lib\mipsiv\debug
Mp3dmod.lib 109,866 23-Sep-2006 00:53 public\directx\oak\lib\mipsiv\retail
Mp3dmod.lib 189,272 23-Sep-2006 00:53 public\directx\oak\lib\mipsiv_fp\debug
Mp3dmod.lib 110,286 23-Sep-2006 00:53 public\directx\oak\lib\mipsiv_fp\retail
Mp3dmod.lib 169,126 23-Sep-2006 00:53 public\directx\oak\lib\sh3\debug
Mp3dmod.lib 99,132 23-Sep-2006 00:53 public\directx\oak\lib\sh3\retail
Mp3dmod.lib 169,006 23-Sep-2006 00:53 public\directx\oak\lib\sh4\debug
Mp3dmod.lib 98,928 23-Sep-2006 00:53 public\directx\oak\lib\sh4\retail
Mp3dmod.lib 155,844 23-Sep-2006 00:52 public\directx\oak\lib\x86\debug
Mp3dmod.lib 90,220 23-Sep-2006 00:52 public\directx\oak\lib\x86\retail


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


After you apply the software update that is described in this article, original equipment manufacturers (OEMs) can configure the minimum allowed size for MP3 DirectX Media Object (DMO) buffer requests. To do this, OEMs must add or modify the following registry entry in their registry configuration files:

[HKEY_LOCAL_MACHINE\Software\Microsoft\DirectX\DirectShow\MP3Decoder] "MinBufferSize"=dword:4000

Note The MinBufferSize value is a hexadecimal value that represents the minimum allowed size, in bytes, for MP3 DMO buffer requests. The default hexadecimal value of 4000 equals 16384 bytes, or 16 KB.


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

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbpubtypekc kbqfe kbfix kbbug KB925039