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Technical Q&As: QuickTime
Applications can use the Image Compression Manager and QuickTime codec components to compress and decompress sounds, images, and image sequences, as well as to transcode sounds and images between compression formats. Data codecs are used with other kinds of compressed data.

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DV Codec settings and performance (HTML) ()
QA1149: Discusses the difference between compression quality, decompression quality, and performance with the DV codec.
2004-01-20
How can I find out what non-RGB pixel formats a codec supports? (HTML) ()
QA1249: Applications can find out if a codec supports non-RGB pixel formats.
2004-01-05
Image Decompressor Data-loading Procs (HTML) ()
QTMCC19: Explains how to use an image decompressor's data-loading proc.
2003-07-10
How can I verify that a Movie can actually draw into a non-RGB GWorld? (HTML) ()
QA1243: Techniques to verify that a Movie can actually draw into a non-RGB GWorld.
2003-03-05
What depth should I put in an Image Description? (HTML) ()
QA1183: Describes how to select the correct value for the depth field of an image description.
2002-08-15
Base-Derived async image codecs must implement ImageCodecQueueStarting and ImageCodecQueueStopping (HTML) ()
QA1157: Describes why base-derived codecs that set canAsync must implement ImageCodecQueueStarting and ImageCodecQueueStopping.
2002-07-09
GraphicsImportSetBoundsRect resets your Matrix (HTML) ()
QA1144: Discusses how calling GraphicsImportSetBoundsRect will reset a graphics importers matrix.
2002-05-29
spatialQuality Values with Lossy Compression (HTML) ()
QA1126: Describes how the spatialQuality value reflects the setting of lossy compressed images like JPEG.
2002-03-12
48 bit & 64 bit Pixel Format support in QuickTime (HTML) ()
QA1114: Discusses QuickTime's support for pixel formats with more than 8 bits per channel.
2002-02-07
Quality of QuickTime video effects (HTML)
QA1089: Describes some of the factors affecting QuickTime video effects quality.
2001-10-26
Limiting the component list in SCRequestImageSettings() (HTML)
QA1062: Describes the scCompressionListType flag, which limits the list of compressors shown in the standard image settings dialog.
2001-07-24
QuickTime Supported YUV Pixel Formats (HTML)
QA1060: Describes which YUV pixel formats are supported by QuickTime.
2001-07-19
Keyframes and AddMediaSample (HTML)
QTMCC20: Describes setting flags correctly for AddMediaSample to mark keyframes and difference frames.
2000-12-01
Graphics Importer -8970 errors & TIFF Support (HTML)
QTMCC18: Discusses the -8970 error when using graphics importers with certain TIFF files.
2000-11-29
Image Compression Dialog Options (HTML)
QTICM14: Describes how to display an extra Options button in the normal Image Compression dialog.
1995-08-01
CompressSequenceBegin & Ethernet in QuickTime (HTML)
QTICM13: Describes resolving an issue with missing ImageDescription when sending compressed images over Ethernet using CompressSequenceBegin.
1995-05-01
Creating Thumbnail PICTs (HTML)
QTICM08: Describes transforming the generic icons of QuickTime PICT-created files into thumbnail icons of these PICTs.
1995-05-01
GDGetScale (HTML)
Deprecated - QTICM04: Describes the function call GDGetScale, its parameters, and errors it may encounter.
1995-05-01
GDHasScale (HTML)
Deprecated - QTICM03: Describes the function GDHasScale; lists what it returns, its main purpose, parameters, and possible errors.
1995-05-01
GDSetScale (HTML)
Deprecated - QTICM05: Describes the function GDSetScale, its parameters, and the errors it may encounter.
1995-05-01
How to Tell Whether a Picture is QuickTime-Compressed (HTML)
QTICM02: Details how to determine whether a picture's QuickTime-compressed, contains QuickTime-compressed images, and type of compression used.
1995-05-01
PICT, QuickTime-Compressed Testing (HTML)
QTICM09: Details how to determine whether a picture's QuickTime-compressed, contains QuickTime-compressed images, and type of compression used
1995-05-01
QuickTime & Noise Problems (HTML)
QTPC02: Talks about ways to reduce noise in movies created with the CinePak codec.
1995-05-01