Microsoft KB Archive/135367

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INFO: How to Avoid Palette Flash During Playback of Video Overlays

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Q135367

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The information in this article applies to:


 * Microsoft Platform Software Development Kit (SDK), on platform(s):
 * Microsoft Windows NT Server versions 3.1, 3.5, 3.51, 4.0
 * Microsoft Windows NT Workstation versions 3.1, 3.5, 3.51, 4.0
 * Microsoft Windows 2000 Professional
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Video for Windows Development Kit, version 1.1

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SUMMARY
Developers of multimedia titles that overlay background bitmaps with AVI (audio-visual interleaved) files are frequently surprised by what is often called "palette flash." The flash or palette re-realization can be eliminated with careful design and consideration during authoring.

MORE INFORMATION
The Windows Palette Manager attempts to satisfy the demands of the foreground window first (the AVI), and leaves background windows to contend for any unused palette entries. Windows that use identical palette entries do not flash, so the key is to author the background image and the AVI with the same palette. Incorporate the playback palette from the AVI into the background image. This works because most video Codecs (compressors and decompressors) can suggest optimal playback palettes.

Additional query words: 1.10 dib

Keywords : kbmm

Issue type : kbinfo

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