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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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Setting the movie background color (HTML) (日本語 HTML)
QTMTB53: Describes how to apply a background color to an entire movie.
QuickTime 1999-08-16
Setting the option button in the ICM dialog (HTML)
QTMCC02: Describes how your codec can display an extra Options button in the Standard Compression dialog.
QuickTime 1995-06-01
SGSetSettings unexpected results (HTML)
QTMTB55: Explains why subsequent calls to the SGSetSettings can fail after the first call to SGSetSettings completed successfully.
QuickTime 1999-10-11
The similarity field in ImageCodecBandCompress and Key Frames (HTML) (日本語 HTML)
QA1109: Discusses the similarity field of the CodecCompressParams structure used in ImageCodecBandCompress to implement key framing during compression.
QuickTime 2002-01-16
Sound Manager Codec support in QuickTime 7 (HTML)
QA1448: Describes QuickTime 7 support for constant bitrate and variable bitrate Sound Manager codecs
QuickTime 2005-10-26
spatialQuality Values with Lossy Compression (HTML) (日本語 HTML)
QA1126: Describes how the spatialQuality value reflects the setting of lossy compressed images like JPEG.
QuickTime 2002-03-12
Specifying Chunk Sizes (HTML)
QTPC08: Discusses the meaning of a QuickTime movie atom's chunk value.
QuickTime 1995-08-01
Standard Audio - Parsing the kQTSCAudioPropertyID_CodecSpecificSettingsArray property (HTML)
QA1437: Discusses how to parse the kQTSCAudioPropertyID_CodecSpecificSettingsArray property returned from StdAudio. Also see Q&A 1390.
QuickTime 2006-11-30
Standard Audio - Setting output ASBD returns badFormatErr (HTML)
QA1489: Discusses why badFormatErr may be returned from Standard Audio
QuickTime 2006-11-15
Standard Audio - The CodecSpecificSettingsArray and MagicCookie properties (HTML)
QA1390: Discusses Core Audio AudioConverter configuration with StdAudio, specifically the CodecSpecificSettingsArray property.
QuickTime 2006-11-16
Stepping Through QuickTime-Movie (HTML)
QTMTB28: Describes how to get the first frame of a movie using GetMovieNextInterestingTime.
QuickTime 1995-05-01
Track Editing (HTML)
QTMCC17: Discusses different APIs used to edit tracks in QuickTime movies.
QuickTime 2000-09-22
Unwanted Audio with DV Capture (HTML) (日本語 HTML)
QA1105: Explains why audio is captured from a DV source even though you may not want to.
QuickTime 2002-01-14
Using a QuickTime time base callback to detect when a movie has stopped (HTML) (日本語 HTML)
QA1282: Using a QuickTime time base callback (NewCallBack) to detect when a movie has stopped.
QuickTime 2003-08-12
Using cmpWantsRegisterMessage not recommended on Mac OS X (HTML) (日本語 HTML)
QA1192: Describes why using the cmpWantsRegisterMessage flag is not recommended on Mac OS X.
QuickTime 2003-03-11
Using ConvertMovieToFile or ConvertMovieToDataRef to convert movies without displaying the settings dialog (HTML)
QA1418: Describes how to perform movie export using ConvertMovieToFile or ConvertMovieToDataRef without displaying the dialog
QuickTime 2005-03-22
Using language-tagged QuickTime UserData text APIs with CFStrings (HTML)
QA1410: Describes how to use language-tagged QuickTime UserData text APIs with CFStrings and TextEncodings.
QuickTime 2005-02-11
Using Mac Toolbox routines Under Windows 98/95/NT (HTML) (日本語 HTML)
QTW87: Some Macintosh Toolbox functions are available with QuickTime 3 for Windows.
QuickTime 1998-09-21
Using Mac-style Resources (HTML) (日本語 HTML)
QTW86: Using Mac-style resources in a Windows 98/95/NT or DLL using QuickTime 3 for Windows FSpOpenResFile function.
QuickTime 1998-09-21
Using MovieExportSetSampleDescription to specify the format of exported data (HTML)
QTMTB59: Describes using the ConvertMovieToFile routine to export a WAV audio-only movie to an AIFF file using a specific compressor.
QuickTime 2000-09-05
Using Navigation Services to filter QuickTime files (HTML) (日本語 HTML)
QA1152: Using the CanQuickTimeOpenFile function in a Navigation Services filter to display files that QuickTime can open.
QuickTime 2002-07-15
Using QTPixelBufferContextCreate with NewMovieFromProperties (HTML)
QA1443: Discusses using a QuickTime pixel buffer visual context and NewMovieFromProperties to output frames to pixel buffers.
QuickTime 2008-08-08
Using QTSetAtomData (HTML) (日本語 HTML)
QA1231: Explains what QTSetAtomData does with the data passed into it.
QuickTime 2003-01-14
Using QuickTime to access MP3 ID3 Tags (HTML) (日本語 HTML)
QA1135: Demonstrates how to extract User Data from QuickTime Movies.
QuickTime 2002-04-11
Using SetMovieGWorld to draw to the window back buffer (HTML)
QA1043: Explains how to draw into the back buffer with SetMovieGWorld.
QuickTime 2001-06-26
Using the kQTPropertyClass_DRM properties with QuickTime (HTML)
QA1476: Explains how to use the kQTPropertyClass_DRM properties with QuickTime media.
QuickTime 2006-04-11
Using the QuickTime DVCompressor properties (HTML)
QA1438: Describes the function of the DVCompressor class component properties.
QuickTime 2005-10-04
Using the QuickTime for Java libraries on OS X (HTML) (日本語 HTML)
QA1058: Where to locate the QTJava.zip file for inclusion in your java/javac classpath.
QuickTime 2002-04-08
Using Windows GDI for all drawing (HTML)
QTW98: Using the Windows Graphics Device Interface (GDI) for all drawing under QuickTime for Windows.
QuickTime 2000-09-05
Video capture with multiple IIDC cameras (HTML)
QA1365: Discusses factors which influence the number of IIDC cameras that can simultaniously be used for capture.
QuickTime 2008-08-08
Video Digitizers - Adding Clean Aperture and Pixel Aspect Ratio Information (HTML)
QA1512: Discusses the importance of adding 'pasp' and 'clap' image description extensions to the ImageDescription returned by a VDIG.
QuickTime 2008-11-20
Video Output Components - Implementing QTVideoOutputGetIndSoundOutput on Mac OS X (HTML) (日本語 HTML)
QA1206: Describes how to support the QTVideoOutputGetIndSoundOutput function in Mac OS X.
QuickTime 2002-10-29
Video Output Components - QTVideoOutputGetIndImageDecompressor (HTML) (日本語 HTML)
QA1226: Discusses the QTVideoOutputGetIndImageDecompressor call.
QuickTime 2003-01-03
Viewing multi-page PDF files (HTML) (日本語 HTML)
QA1247: How to draw each page of a multi-page PDF document using the QuickTime movie importers.
QuickTime 2003-03-05
What depth should I put in an Image Description? (HTML) (日本語 HTML)
QA1183: Describes how to select the correct value for the depth field of an image description.
QuickTime 2006-11-27
What is SetMovieDefaultDataRef? (HTML) (日本語 HTML)
QTMTB48: Describes the routine SetMovieDefaultDataRef and includes sample code showing how to use it.
QuickTime 1997-03-14
When to use PCMCIA, PC Card, and CardBus (HTML)
HW77: Explains the differences between PCMCIA, PC Card, and CardBus.
QuickTime 1999-11-15
Where do QuickTime extension files reside on Windows systems? (HTML)
QTW100: Describes where to locate QuickTime extension files on Windows systems.
QuickTime 2007-07-30
Why does my identity matrix look strange? (HTML) (日本語 HTML)
QA1227: Discusses the MatrixRecord structure and QuadToQuadMatrix function.
QuickTime 2003-01-15
Why isn't my QuickTime Component recognized by iMovie '08? (HTML)
QA1545: Discusses why iMovie '08 may ignore 3rd party QuickTime Components.
QuickTime 2007-10-03
Calling an AppleScript and providing parameters from an Application (HTML) (日本語 HTML)
QA1111: Explains calling and providing parameter values to an AppleScript event handler from an application written in C.
Scripting & Automation 2002-03-13
Calling AppleScript from an Application (HTML)
QA1026: Describes how to call an AppleScript from an application written in C.
Scripting & Automation 2001-04-10
How do I access files contained in my AppleScript Studio application's main bundle? (HTML)
QA1493: Explains how to access files stored within an AppleScript Studio application.
Scripting & Automation 2007-02-05
Loading Scripting Additions in Mac OS X (HTML)
QA1070: Explains how to load scripting additions so you can call them using Apple events.
Scripting & Automation 2005-05-06
Why is my Ruby on Rails application with FastCGI generating "'load error /etc/irbrc" errors? (HTML)
QA1494: Describes how to resolve an error encountered hosting Ruby on Rails applications on Mac OS X 10.5.
Scripting & Automation 2007-11-28
Accessing HTTPS Proxy Settings (HTML) (日本語 HTML)
QA1234: Describes how to programatically access Secure Web Proxy information.
Security 2003-02-19
AuthorizationCreateFromExternalForm 100022 Error Explained (HTML)
QA1498: Explains the undocumented 100022 return value from AuthorizationCreateFromExternalForm.
Security 2007-01-04
Be careful when using AuthorizationCreate (HTML) (日本語 HTML)
QA1172: Explains why you should avoid determining allowable rights when creating an AuthorizationRef.
Security 2002-09-20
Describing the kSecTrustResultUnspecified error. (HTML)
QA1360: Explaining the semantics behind the kSecTrustResultUnspecified error returned by the Security APIs.
Security 2007-02-05
Does Safari support 128-bit encryption? (HTML)
QA1320: Discusses support for 128-bit encryption in Apple's Safari web browser.
Security 2004-09-10
Enabling X11 Forwarding (HTML)
QA1383: Describes how to enable ssh clients to receive X11 communication from a Mac OS X system.
Security 2004-10-25
Getting a Packet Trace (HTML) (日本語 HTML)
QA1176: Lists tools available for looking at the network packets on the wire.
Security 2008-06-03
Installing smart card reader drivers (HTML)
QA1359: Updates obsolete information contained in the pcscd(8) man page on Mac OS X Jaguar and Panther.
Security 2004-08-30
Mac OS X and root access (HTML)
QA1013: Describes how to enable root access in Mac OS X.
Security 2008-09-16
Programmatically Accessing and Manipulating Multiple Keychain Items (HTML)
QA1486: An explanation on what is and is not possible using the SecKeychain API to manipulate Keychain Items.
Security 2006-10-03
Security Credentials (HTML) (日本語 HTML)
QA1277: Discusses AuthorizationCopyRights and the relationship between Authorization Services, authorization sessions, Security Server, credentials, and the credentials cache.
Security 2003-08-06
Security Framework Error Codes (HTML)
QA1499: Explains how to interpret errors returned by the Security Framework with an overview of Security error handling.
Security 2006-11-16
Stay away from custom Authorization dialogs (HTML) (日本語 HTML)
QA1199: Explains why you shouldn't create a custom authorization dialog.
Security 2002-09-20
What are snag keys in Open Firmware? (HTML) (日本語 HTML)
HW35: Explains Open Firmware snag keys, including examples of their function.
Security 1999-02-15
Connecting the Font Menu in Interface Builder 3 (HTML)
QA1571: How to connect and configure the Font/Format menus in Interface Builder 3.
Text & Fonts 2008-01-21
Converting to Precomposed Unicode (HTML) (日本語 HTML)
QA1235: Describes how to convert a string to precomposed Unicode.
Text & Fonts 2003-02-07
Disabling and Enabling an NSTextView (HTML)
QA1461: Shows how a Cocoa application can disable and enable an NSTextView.
Text & Fonts 2006-09-11
Drawing attributed strings that are both filled and stroked (HTML)
QA1531: Describes how the value of NSStrokeWidthAttributeName indicates fill, stroke, or both, in attributed strings.
Text & Fonts 2008-03-25
Enumerating fonts with ATS (HTML)
QA1471: Describes the different ATS font enumeration methods
Text & Fonts 2006-04-14
grayishTextOr and Mac OS 8.5 (HTML) (日本語 HTML)
Deprecated - QD59: Explains why text drawn using TextMode(grayishTextOr) is never drawn; provides a workaround.
Text & Fonts 1998-12-07
How do I get the hexadecimal value of an NSColor object? (HTML)
QA1576: Describes how to convert an NSColor object to its Hexadecimal value.
Text & Fonts 2007-12-19
How to make NSTextField accept tab, return and enter keys. (HTML)
QA1454: Describes how to make the NSTextField control accept tab, return and enter keys by using the control's dispatch delegate method.
Text & Fonts 2006-10-09
Improving ATSUI Text Drawing Performance (HTML)
QA1027: Talks about one way of improving ATSUI text drawing performance.
Text & Fonts 2001-04-17
Locating a Font's Home File (HTML) (日本語 HTML)
Deprecated - TB18: Lists the steps necessary to find the home file of a given font.
Text & Fonts 1996-02-15
Losing the character code when using the control key (HTML)
QA1446: Explains why the control key transforms the character code instead of simply setting the appropriate modifier bit.
Text & Fonts 2006-07-17
QDFlushPortBuffer (HTML) (日本語 HTML)
QD65: Describes a possible solution for window update problems under Carbon.
Text & Fonts 2000-11-08
SetFontInfoForSelection incorrect prototype (HTML)
QA1375: Describes the incorrect prototyping of the SetFontInfoForSelection API and gives a workaround.
Text & Fonts 2004-10-04
Sorting Like the Finder (HTML)
QA1159: Shows how to sort strings like the Finder's list view.
Text & Fonts 2004-10-27
Automatically starting and stopping application instances without using Monitor (HTML)
QA1064: Describes how to use WebObjects' monitor utility to stop and start application instances.
Tools 2001-07-25
Building Objective-C static libraries with categories (HTML)
QA1490: Describes how to properly build Objective-C static libraries that contain categories on existing classes.
Tools 2006-10-03
Can't attach during two-machine debugging with GDB (HTML) (日本語 HTML)
Deprecated - QA1019: Describes a workaround for a problem attaching during two-machine debugging on Mac OS X 10.0.x.
Tools 2003-06-02
CFBundleIdentifier and user application access (HTML)
QA1373: Describes the role of CFBundleIdentifier in limiting a user's application access.
Tools 2005-02-08
Changing the TCP Window Size (HTML)
NW47: Describes how to change the TCP window size in Open Transport.
Tools 1997-03-14
Common QA and Roadmap for USB Software Development on Mac OS X (HTML)
QA1370: Roadmap for development of USB Software on Mac OS X and some Common Questions and Answers
Tools 2006-02-28
Connecting the Font Menu in Interface Builder 3 (HTML)
QA1571: How to connect and configure the Font/Format menus in Interface Builder 3.
Tools 2008-01-21
Correcting a PackageMaker version.plist and BundleVersions.plist problem (HTML) (日本語 HTML)
QA1281: Describes how to correct a PackageMaker version.plist and BundleVersions.plist problem.
Tools 2003-08-25
Creating install packages from the command line (HTML)
QA1284: Describes how to create install packages from the command line.
Tools 2007-01-22
Debugging a WebKit Plug-in in Xcode (HTML)
QA1500: Directions for debugging a WebKit plug-in in Xcode.
Tools 2007-06-05
Debugging arbitrary applications with Xcode (HTML)
QA1305: Debugging an application with Xcode without requiring the project that built the application.
Tools 2003-09-15
Debugging NSTableView's "Action Invocation" binding (HTML)
QA1472: Discusses the issues and factors that affect NSTableView's "Action Invocation" binding.
Tools 2006-11-13
Debugging Process Startup (HTML)
QA1573: Describes techniques for debugging a process's startup code.
Tools 2007-12-21
Deprecated CALL_ON_[UN]LOAD pragmas (HTML)
QA1429: Replace deprecated CALL_ON_[UN]LOAD pragmas with constructor [destructor] function attributes.
Tools 2006-01-10
Detecting the Debugger (HTML)
QA1361: Shows how to determine whether you're being run under the debugger.
Tools 2004-10-27
Developing with ZeroLink: small applications and launching on other computers (HTML)
QA1322: Resolving issues caused by the ZeroLink feature in Xcode.
Tools 2003-10-31
Disabling Processor Cores on a Multi-Core System (HTML) (日本語 HTML)
QA1141: Describes how to disable processor cores on a multi-core system for testing purposes.
Tools 2008-09-16
Documentation updater for Project Builder shipping with Mac OS X 10.2 (HTML) (日本語 HTML)
QA1207: Updating Project Builder to find new symbols, including the Bluetooth framework under Mac OS X.
Tools 2002-10-25
'dynamic shared library not made a weak library in output with MACOSX_DEPLOYMENT_TARGET...' bug (HTML) (日本語 HTML)
QA1233: Why 'ld' may give a warning about the Mac OS X_DEPLOYMENT_TARGET environment variable and its failure to weak link.
Tools 2003-04-01
FrontBase and JDBC (HTML)
QA1041: Describes an alternative to using the JDBC adaptor with FrontBase for WebObjects 5.0.
Tools 2001-07-09
Generating a Non-Maskable Interrupt (NMI) (HTML) (日本語 HTML)
QA1264: Explains how to generate a non-maskable interrupt (NMI) on modern Macintosh systems.
Tools 2008-10-13
Getting owner and group name references for PackageMaker package contents (HTML) (日本語 HTML)
QA1285: Describes how to get owner and group name references for PackageMaker package contents.
Tools 2003-08-25
Help Book Caching During Software Development (HTML)
QA1409: Development situations that can potentially confuse Help Viewer
Tools 2005-03-30
How can I get both Subversion (SVN) and CVS on Mac OS X 10.5 (Leopard)? (HTML)
QA1492: Explains where to find Subversion and CVS for installation.
Tools 2007-11-15
How do I access files contained in my AppleScript Studio application's main bundle? (HTML)
QA1493: Explains how to access files stored within an AppleScript Studio application.
Tools 2007-02-05
How do I use asserts while debugging? (HTML)
QA1431: How do I enable asserts so they log their messages and/or break when I'm debugging?
Tools 2006-06-30
How to add a folder to the contents of a package (HTML)
QA1484: Describes how to add a folder of files to the package contents of executable code
Tools 2006-10-31