FIX: An extra PlayCount right is decremented if you seek in a DirectShow program that contains DRM-protected content

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Article ID: 841072 - View products that this article applies to.
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SYMPTOMS

When you perform a seek operation in digital content, you may notice that the remaining PlayCount right is decremented when the following conditions are true:
  • The content is DRM-protected by using digital rights management (DRM) technology.
  • The content uses the PlayCount right in a DirectShow-based program.
  • If the PlayCount right has reached 0 when you try to seek, playback may stop.
Note This problem does not occur with Microsoft Windows Media Player.

CAUSE

This problem occurs because the filter graph is stopped and restarted during a seek operation. The Windows Media Active Streaming Format (WM ASF) Reader filter stops and restarts the filter graph during a seek operation. This behavior decrements the PlayCount right. The WS ASF Reader filter is used when you play back DRM-protected content in a DirectShow program.

RESOLUTION

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next release that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The following file is available for download from the Microsoft Download Center:
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Download
Download the WindowsMedia9-KB841072-ENU.exe package now.

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.

The English version of this hotfix has the file attributes (or later) 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 tool in Control Panel.
   Date         Time   Version            Size    File name
   --------------------------------------------------------------
   17-Apr-2004  15:28  9.0.0.3167      2,087,672  Wmvcore.dll      

STATUS

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

Properties

Article ID: 841072 - Last Review: June 2, 2006 - Revision: 3.3
APPLIES TO
  • Windows Media Format 9 Series Software Development Kit
Keywords: 
kbbug kbfix kbqfe kbhotfixserver KB841072

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