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Technical Q&As are short question and answer formatted pages that provide answers to questions frequently received at Apple Developer Technical Support.

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Creating Sub GWorlds using QTNewGWorldFromPtr (HTML)
QA1014: Using QTNewGWorldFromPtr to create sub GWorlds which reference the pixel data of other GWorlds.
QuickTime 2001-03-20
Creating Thumbnail PICTs (HTML)
QTICM08: Describes transforming the generic icons of QuickTime PICT-created files into thumbnail icons of these PICTs.
QuickTime 1995-05-01
Creating track references when editing movies (HTML)
QTMTB61: Explains how to use the InsertTrackSegment function to copy a track reference rather than the actual media.
QuickTime 2000-09-05
Decompressing IMA WAVE files (HTML)
QTMCC11: Describes how to use the Sound Manager to decompress and play Window's Microsoft ADPCM-compressed WAVE files.
QuickTime 1998-10-19
Decompressing MP3 (HTML)
QTMCC15: Discusses decompressing an MP3 file into a buffer using SoundConverter APIs.
QuickTime 2000-09-22
Decompression Sessions - Setting codec accuracy and field mode (HTML)
QA1460: Describes how to set codec accuracy and field mode options when creating a decompression sessions.
QuickTime 2006-01-12
Derived Media Handler Components Update (HTML) (日本語 HTML)
QTMCC08: Gives practical limits for data transfer rates under QuickTime 2.5.
QuickTime 1996-08-21
Determining Open Firmware configuration variables (HTML) (日本語 HTML)
HW56: Discusses how to determine the Open Firmware variables on a system.
QuickTime 1999-03-29
Determining QuickDrawVideo Media Pixel Depth (HTML)
QTMTB17: Demonstrates how to retrieve the pixel depth of a QuickTime video media or movie.
QuickTime 1995-05-01
Determining required components for QuickTime movies (HTML)
QA1093: Shows how to determine if a given QuickTime movie requires a component that's not currently installed on the system.
QuickTime 2001-11-07
Developing a QuickTime Musical Instrument (HTML)
Deprecated - QTMA05: Explains resolving the lack of QuickTime 2.0 API support for creating new music components.
QuickTime 1995-05-01
Difference between using Restart or Shut Down in the Finder's Special menu in Open Firmware (HTML) (日本語 HTML)
HW47: Explains the differences between using Restart or Shut Down on Open Firmware
QuickTime 1999-02-15
Disabling QuickTime Error Dialogs When Opening or Tasking a Movie (HTML) (日本語 HTML)
QA1164: How to disable QuickTime error dialogs which may be presented when opening or tasking a movie.
QuickTime 2003-03-20
DV Codec settings and performance (HTML) (日本語 HTML)
QA1149: Discusses the difference between compression quality, decompression quality, and performance with the DV codec.
QuickTime 2004-01-20
Dynamically registering a bundled component (HTML)
QA1083: Describes how to dynamically register a Component which resides in an Application bundle.
QuickTime 2004-06-07
Endian Concerns When Playing 'snd ' Resources (HTML)
QTW97: Use the Resource Manager to avoid byte-swapping 'snd ' resources before playing under Windows
QuickTime 1999-11-08
Expansion ROM device properties (HTML) (日本語 HTML)
HW50: Describes the Open Firmware properties that should be included in a boot device's expansion ROM.
QuickTime 1999-03-29
Exporting TIFF files in little-endian format (HTML)
QA1044: Explains how to export a TIFF file in little-endian format.
QuickTime 2001-06-26
Extracting DV Fields using QTNewGWorldFromPtr (HTML)
QA1017: Describes using QTNewGWorldFromPtr to access individual fields contained within a frame of DV source.
QuickTime 2001-03-20
Filtering QuickTime media types in Navigation Services (HTML) (日本語 HTML)
QA1274: Describes how to filter QuickTime media types in a Navigation Services filter procedure.
QuickTime 2003-07-23
Filtering the Effects List returned by QTGetEffectsList (HTML) (日本語 HTML)
QA1190: Shows how to edit the list of effects returned by the QTGetEffectsList function.
QuickTime 2002-09-04
Final Cut Pro - Preferred Video Media Time Scales and Sample Durations (HTML)
QA1447: Lists the preferred time scales/sample durations for media created for use with FCP.
QuickTime 2005-10-24
Functions that Modify Movie Properties, QuickTime Track, and Movie Sound Volume (HTML)
QTMTB39: Explains movie volume values, and how to exceed the maximum level using Sound Manager 3.0.
QuickTime 1995-05-01
GDGetScale (HTML)
Deprecated - QTICM04: Describes the function call GDGetScale, its parameters, and errors it may encounter.
QuickTime 1995-05-01
GDHasScale (HTML)
Deprecated - QTICM03: Describes the function GDHasScale; lists what it returns, its main purpose, parameters, and possible errors.
QuickTime 1995-05-01
GDSetScale (HTML)
Deprecated - QTICM05: Describes the function GDSetScale, its parameters, and the errors it may encounter.
QuickTime 1995-05-01
GetDIBFromPict fails with QuickTime "Minimum" installation (HTML)
QA1294: Demonstrates how to check for any available QuickTime components required by individual QuickTime functions.
QuickTime 2004-09-28
Getting a Packet Trace (HTML) (日本語 HTML)
QA1176: Lists tools available for looking at the network packets on the wire.
QuickTime 2008-06-03
Graphics Exporters - Creating 16-bit-per-channel image files (HTML)
QA1354: Discusses how to use QuickTime Graphics Exporters to create 16-bit-per-channel image files.
QuickTime 2004-06-03
Graphics Importer -8970 errors & TIFF Support (HTML)
QTMCC18: Discusses the -8970 error when using graphics importers with certain TIFF files.
QuickTime 2000-11-29
Graphics Importers and image files containing multiple layers (HTML) (日本語 HTML)
QA1148: Describes how to get the natural bounds of layers contained in a multi-layered image file.
QuickTime 2002-06-18
GraphicsImportSetBoundsRect resets your Matrix (HTML) (日本語 HTML)
QA1144: Discusses how calling GraphicsImportSetBoundsRect will reset a graphics importers matrix.
QuickTime 2002-05-29
Handling of Update Events While a Movie Plays (HTML)
Deprecated - QTMTB45: Describes timing issues that can be caused by applications calling WaitNextEvent while playing a QuickTime movie.
QuickTime 1995-09-15
How can I find out what non-RGB pixel formats a codec supports? (HTML) (日本語 HTML)
QA1249: Applications can find out if a codec supports non-RGB pixel formats.
QuickTime 2008-04-24
How can I verify that a Movie can actually draw into a non-RGB GWorld? (HTML) (日本語 HTML)
QA1243: Techniques to verify that a Movie can actually draw into a non-RGB GWorld.
QuickTime 2003-03-05
How can I work with MPEG-2 media using QuickTime? (HTML)
QA1540: How to work with MPEG-2 media using QuickTime.
QuickTime 2007-08-29
How do I count the frames in an MPEG movie? (HTML) (日本語 HTML)
QTMTB54: Talks about using the QuickTime Movie Toolbox function GetMovieNextInterestingTime with MPEG media tracks.
QuickTime 2003-05-02
How do I create a QuickTime movie from PCM audio samples in memory? (HTML)
QA1539: How to create a QuickTime movie from PCM audio samples in memory
QuickTime 2007-08-29
How do I decompress individual frames into an offscreen? (HTML)
QTMTB57: Describes methods for decompressing individual frames of a video track into an offscreen memory buffer.
QuickTime 2000-04-24
How to Compute Data Rate for QuickTime Movies (HTML)
QTMTB46: Describes two methods of measuring the rate of samples for Quicktime movies.
QuickTime 1995-09-15
How to get a native QuickTime movie object from the QuickTime ActiveX/COM control (HTML)
QA1594: Describes how to get a native QuickTime movie object from the QuickTime ActiveX/COM control
QuickTime 2008-03-27
How to Get the First Video Frame (HTML)
QTMCC01: Describes how to get the first frame of a movie using GetMovieNextInterestingTime.
QuickTime 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.
QuickTime 1995-05-01
How to work around HIMovieViewCreate failing (HTML)
QA1417: Describes how to work around HIMovieViewCreate failing to initialize the view in QuickTime 7
QuickTime 2008-03-11
Image Compression Dialog Options (HTML)
QTICM14: Describes how to display an extra Options button in the normal Image Compression dialog.
QuickTime 1995-08-01
Image Decompressor Data-loading Procs (HTML) (日本語 HTML)
QTMCC19: Explains how to use an image decompressor's data-loading proc.
QuickTime 2003-07-10
ImageDescription Extension Format (HTML) (日本語 HTML)
QTMCC04: Gives a reference for information on image description extensions.
QuickTime 1996-11-27
Implementing a CVFillExtendedPixelsCallBack (HTML)
QA1440: Discusses how you implement a Core Video custom extended pixel fill callback function.
QuickTime 2005-09-06
Importer Components - What is the 'mcfg' resource used for? (HTML) (日本語 HTML)
QA1267: Discusses the Media Configuration 'mcfg' resource which lists Importer Component file type characteristics and its use.
QuickTime 2005-10-17
Importing image data from memory (HTML)
QTMTB56: Explains using the graphics importer API's to read image data which resides in memory.
QuickTime 2000-04-03
Importing Sys 7 Snds (HTML)
QTMCC16: Describes how to import System 7 sound files using QuickTime.
QuickTime 2000-09-22
Incorrect Inside Macintosh Volume V documentation (HTML)
Deprecated - QD15: Identifies incorrect documentation in Inside Macintosh Volume V regarding the formats of PnPixPat and BkPixPat opcodes.
QuickTime 1995-09-15
Integrating the QuickTime for Windows 7.0.3 Installer into your Application Installer (HTML)
QA1463: Describes new behavior for the QuickTime for Windows 7.0.3 Installer
QuickTime 2006-02-07
Intercepting movie controller actions (HTML)
QA1094: Demonstrates how to intercept movie controller actions.
QuickTime 2001-11-14
Intercepting QuickTime Wired Actions (HTML)
QA1095: Demonstrates how to intercept wired actions in a movie controller action filter function.
QuickTime 2001-11-14
IOKit Framework Headers (HTML) (日本語 HTML)
QA1107: Describes the differences between the headers in IOKit.framework and the I/O Kit headers in Kernel.framework.
QuickTime 2002-01-15
Is ColorSync thread safe? (HTML) (日本語 HTML)
QA1261: Discusses ColorSync thread-safety issues.
QuickTime 2003-04-17
Is QuickTime thread-safe? (HTML)
QA1088: Discusses thread-safety and reentrancy of the QuickTime library on both Mac & Windows.
QuickTime 2006-02-14
Is the Open Firmware device tree object oriented? (HTML)
HW80: Discusses the object-oriented attributes of the Open Firmware device tree.
QuickTime 1999-11-15
iSight - Configuring gain settings for IIDC cameras (HTML)
QA1421: Discusses how to configure features of IIDC cameras, specifically gain for the iSight
QuickTime 2005-04-06
Keyframes and AddMediaSample (HTML)
QTMCC20: Describes setting flags correctly for AddMediaSample to mark keyframes and difference frames.
QuickTime 2000-12-01
Legacy Devices (HTML)
HW84: Discusses why legacy devices with hard-wired I/O addresses may not work properly with Open Firmware.
QuickTime 2000-03-20
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.
QuickTime 2006-01-12
Linked Movies with Different Color Palettes (HTML) (日本語 HTML)
QTMRF07: Explains why a QuickTime movie shouldn't contain subMovies that have different color palettes.
QuickTime 1996-02-15
LockPixels and DisposeGWorld with QTNewGWorldFromPtr (HTML)
QA1007: Clarifies some issues surrounding pointer ownership when creating GWorlds with QTNewGWorldFromPtr
QuickTime 2001-02-26
Looping Audio Files with QuickTime for Windows (HTML)
QA1559: How to Continuously Loop Audio Files with QuickTime for Windows
QuickTime 2007-10-09
MCSetClip and Clipping with the Movie Controller (HTML)
QTMTB18: Tells why the movie controller ignores the clip set by SetMovieDisplayClipRgn and shows a correct clipping technique.
QuickTime 1995-05-01
Movie Drawing Complete Procedure with C++ (HTML) (日本語 HTML)
QA1150: Demonstrates a static class method which can be used as a QuickTime movie drawing complete callback.
QuickTime 2002-06-18
Movie Export - Always fill in the MovieExportGetDataParams dataSize field (HTML)
QA1304: Outlines the importance of correctly filling in the MovieExportGetDataParams dataSize field when exporting from procedures.
QuickTime 2005-02-25
Movie Export Component - How to ensure Final Cut Pro recognizes your exporter (HTML)
QA1415: Explains how to make sure Final Cut Pro will recognizes a custom QuickTime movie export component.
QuickTime 2005-03-08
Movie Export Components - Supporting a MovieProgressProc (HTML) (日本語 HTML)
QA1230: Explains the steps needed to support a movie progress proc in a movie export component.
QuickTime 2003-01-31
Movie Export From Procedures - Providing k2vuyPixelFormat data to MovieExportGetDataProc (HTML)
QA1465: Discusses adding the missing 'rowb' ImageDescription extension when using MakeImageDescriptionFromPixMap with a k2vuyPixelFormat GWorld for a procedures export.
QuickTime 2006-03-03
Movie export with AAC or AMR audio formats (HTML)
QA1347: This QA discusses use of the QuickTime AMR and AAC audio compressors on Macintosh and Windows
QuickTime 2007-04-13
Movie Import Component Selectors (HTML) (日本語 HTML)
QTMCC09: Explains why there is no documentation on the movie import API selectors: kMovieImportGetFileTypeSelect and kMovieImportDataRefSelect.
QuickTime 1996-08-21
Movie Import Components - MovieImportDataRef Invoked For File Import Operations (HTML)
QA1596: Discusses how QuickTime 7.4+ invokes Movie Import Components when specifically importing from files.
QuickTime 2008-03-11
MovieAudioExtraction - Ensure a Movie is fully loaded before starting an extraction session (HTML)
QA1469: Describes the importance of making sure a Movie is fully loaded before extracting audio.
QuickTime 2006-03-29
MovieAudioExtraction - Extracting all available audio samples (HTML)
QA1481: Describes how to correct for MovieAudioExtraction missing some audio samples at the end of audio files.
QuickTime 2006-07-18
Movies - Saving movie playback hints (HTML)
QA1366: Explains how to save and load media play hints from Movie files.
QuickTime 2004-09-14
MPEG Compression in QuickTime (HTML)
QTICM16: Describes extracting information from an MPEG movie file and placing it in a specific MPEG track.
QuickTime 1995-08-01
MSVC++ link error LNK4098 When Building QuickTime 3 for Windows Apps (HTML) (日本語 HTML)
QTW94: Avoid MSVC++ link error LNK4098 when building QuickTime 3 for Windows applications.
QuickTime 1998-09-21
The "packages" node in the device tree (HTML)
HW90: Describes the "packages" node in the Open Firmware device tree.
QuickTime 2006-02-22
paramErr returned from ConvertMovieToFile when exporting to .wav (HTML)
QA1313: Avoid a paramErr returned from ConvertMovieToFile by setting up a Sound Description when exporting to a .wav file.
QuickTime 2003-10-06
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
QuickTime 1995-05-01
Playing memory-resident WAVE data using QuickTime 4 (HTML) (日本語 HTML)
QTMTB52: Explains how to play memory-resident WAVE data in QuickTime 4 or later.
QuickTime 1999-07-21
Playing QuickTime 3 Movie Sound Data (HTML) (日本語 HTML)
QTMTB50: Explains why a movie's sound data can continue to play longer than video data.
QuickTime 1998-11-09
Preroll Movies (HTML)
QTMTB42: Lists the advantages of calling PreRollMovie to improve the performance of QuickTime movies.
QuickTime 1995-05-01
Preserving embedded ICC profiles when using QuickTime Graphics Importer/Exporters (HTML) (日本語 HTML)
QA1145: Shows how to preserve the embedded ICC profile when using the QuickTime Graphics Importer/Exporter routines
QuickTime 2002-09-04
Preview image quality of DV capture (HTML)
QTMCC12: Describes how to get full resolution preview image quality when capturing DV.
QuickTime 2000-10-25
Programatically retrieving field and frame information (HTML)
QA1547: Discusses the use of the kICMImageDescriptionPropertyID_FieldInfo property to retrieve Field/Frame information.
QuickTime 2007-09-13
Programmatic configuration of a Movie Export Component (HTML) (日本語 HTML)
QA1147: Demonstrates how to programmatically configure a movie export component without showing the Movie Export dialog.
QuickTime 2002-06-18
QTKit Capture - Disabling Audio Or Video When Capturing From a Muxed Device (HTML)
QA1607: Describes the use of the setEnabled: method to disable audio or video capture from muxed devices.
QuickTime 2008-05-19
QTKit Capture - Extracting SMPTE Timecode information from a QTSampleBuffer (HTML)
QA1600: Describes how to use the QTSampleBufferSMPTETimeAttribute with a sample buffer.
QuickTime 2008-03-17
QTKit Capture - Setting DecompressedVideoOutput CVPixelBuffer Attributes (HTML)
QA1582: Describes how to configure a DecompressedVideoOutput objects CVPixelBuffer attributes.
QuickTime 2008-03-06
QTKit Capture - Specifying Media Compression Settings (HTML)
QA1586: Describes how to configure a file output object to save compressed captured media.
QuickTime 2008-03-11
QTML, c2pstr and Pascal strings (HTML) (日本語 HTML)
QA1112: Describes how to avoid headaches when dealing with Pascal to C string conversion with QTML.
QuickTime 2002-01-21
Quality of QuickTime video effects (HTML)
QA1089: Describes some of the factors affecting QuickTime video effects quality.
QuickTime 2001-10-26
QuickTime & Noise Problems (HTML)
QTPC02: Talks about ways to reduce noise in movies created with the CinePak codec.
QuickTime 1995-05-01
QuickTime & PutMovieIntoDataFork, Offsets (HTML)
QTMTB34: Explains restrictions on moving movie data around in a file after creation; also gives work arounds.
QuickTime 1995-05-01
QuickTime .qtx/.qtr/.qt/.mov files defined (HTML)
QTW99: Definitions for the QuickTime for Windows .qtx/.qtr/.qt/.mov files.
QuickTime 2000-09-05
QuickTime 6.4 & AvailabilityMacros.h on Mac OS X 10.2.x (HTML)
QA1316: Fixing compilation issues when upgrading to QuickTime 6.4 on Mac OS X 10.2.x systems.
QuickTime 2003-10-21