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- September 29, 1994
-
-
- Dear Video for Windows Developer:
-
- Enclosed you will find the Video for Windows 1.1d Runtime. This release includes some important
- enhancements requested by you, including improved palette support, Display Control Interface
- (DCI) support and overall improvements in performance.
-
- The files that have changed are the following:
- File Name Change Description
- AVICAP.DLL Added application pre-roll and post-roll support.
- DCISVGA.DRV DCI provider for S3 and Cirrus Logic display cards.
- DVA.386 Added DCI support.
- ICCVID.DRV Cinepak Codec: Added palette support.
- IMAADPCM.ACM IMA ADPCM Codec: Change in the compression algorithm used in order to fully meet the official format specifications.
- IR32.DLL Indeo Codec: Updated to version 3.2, added palette support.
- MSVIDEO.DLL Added palette and DCI support.
- MSVIDEO.NT Updated the Windows NT 3.5 to support 16 bit capture.
- OLE2DISP.DLL Updated to current release of OLE.
- OLE2NLS.DLL Updated to current release of OLE.
- SETUP.INF Updated to new file sizes, versions and dates.
- STDOLE.TLB OLE file missing from original VfW runtime.
- TYPELIB.DLL Updated to current release of OLE.
-
- Palette Support
- Video for Windows has always allowed the application to select a specific
- palette for playback on 8 bit displays. Unfortunately, the codecs
- (compressor\decompressors) were never aware of this palette request.
- Instead the codecs would dither to their own standard palette. Video for
- Windows would then further dither the video to the requested color palette.
- The net result was 24 bit videos, when played back with a requested palette,
- were dithered twice. This would compromise the quality of the video.
-
- This problem has been solved with this new drop of MSVIDEO.DLL, and the
- Cinepak and Indeo codecs. The codecs will now decompress directly to a
- requested palette. You can request the codecs to use a palette with either
- the SETVIDEO <alias> PALETTE HANDLE TO <hpal>, or REALIZE <alias> BACKGROUND
- MCI commands. You can find these commands in the Video for Windows 1.1
- documentation.
-
- DCI Support
- DCI allows Video for Windows to take advantage of the enhanced capabilities
- of your display cards. You will now see faster and smoother playback of
- video on display cards that use the S3, Cirrus Logic, and many other chip
- sets. Video for Windows will also support all DCI-enabled display adapters.
- Furthermore, the performance of stretched and clipped videos will be
- drastically improved for all displays.
-
- For further information on API changes, please see the "New Performance
- APIs" listed in the DEV_KIT.TXT of the Video for Windows SDK. This SDK is
- available from the Fall '94 addition of the MSDN Level II.
-
-
- Sincerely,
-
-
- The Video for Windows Team
-
-