Video Does Not Play in Windows Media Player When Width Is Clipped

ID: Q244168

The information in this article applies to:

Microsoft Windows Media Services versions 4.0, 4.1

SYMPTOMS

When you encode video in an aspect ratio that is not in multiples of 8 (for example 316x240 instead of 320x240), the video does not play in Windows Media Player, even though it appears correctly in the Windows Media Encoder preview window.

CAUSE

This issue occurs because the Microsoft MPEG-4 V3 video codec use a different image buffer size. This only happens if you chose the YUV pixel format and the clipping image size is not a multiple of 8.

WORKAROUND

Make sure image sizes are in multiples of 8 for both X and Y axes.

MORE INFORMATION

The difference in the image buffer size between Windows Media Encoder and the MPEG-4 V3 codec occurs because the codec calculates the image size with image size specifications for RGB images, and the Windows Media Encoder does not enforce those specifications.

Additional query words: netshow wms wmt wmp

Keywords : kbwms41
Version : :4.0,4.1
Platform :
Issue type : kbprb