• You may experience a color smearing or bleeding effect when you play MPEG4 videos in Windows Media Player 9 or 10

In Microsoft Windows Media Player 9 or 10, you may experience a color smearing or bleeding effect when you play some MPEG4 videos. This behavior often occurs when the video contains fast-moving scenes of varying colors.

This problem occurs because of an issue with the way that the MPEG4 codec handles motion vectors. Sometimes, the decoder mistakenly uses invalid motion vectors.


Download the WindowsMedia-KB895181-x86-ENU.exe package

See more details here...



• MPEG4 content may be blocky when you use the Windows Media Player

When you play back certain pieces of MPEG4 content, the rendered video may appear blocky.

This behavior occurs because the MPEG4 decoder does not correctly put a boundary on all quantized coefficients. Therefore, the decoder uses the wrong prediction direction, and the video looks blocky.


Download the WindowsMedia9-KB872899-x86-ENU.exe package

See more details here...


Important! The supported hotfixes available from Microsoft are only intended to correct the problems that are described in this article. Only apply them to systems that are experiencing the specific problems. These hotfixes may receive additional testing. Therefore, if you are not severely affected by these problems, Microsoft recommends that you wait for the next release that contains the hotfixes.

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• Related links:
- Codecs Supported by Windows Media Player for Windows XP
- How to (re)install Default Codecs in Windows XP/2000
- Adding and Removing Default Codecs (and MCI) in Windows 95/98/Me
- Windows Media Player: Highlights, How To Articles & Updates