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

Document Descriptions
On Off
Display

Sort by
Title
Sorted by
Topic
Sort by
Date
QuickTime for Windows resource files (HTML) ()
QA1132: Describes resource file extensions supported by QuickTime for Windows.
QuickTime 2002-04-08
QuickTime Media Editing (HTML) ()
QA1110: Explains the term "Media" as used in QuickTime and how it relates to media editing APIs.
QuickTime 2002-01-16
QuickTime movies require a valid graphics port (HTML)
QA1345: The QuickTime Movie Toolbox requires a valid graphics port for all movies.
QuickTime 2004-03-19
QuickTime Music Architecture Header Update (HTML) ()
QTMA06: Explains missing and changed items in QuickTime 2.5.
QuickTime 1996-08-21
QuickTime Preview Behavior (HTML) ()
QTMCC10: Describes the expected behavior of the create/update preview button in the SFPGetFilePreview dialog.
QuickTime 1996-11-27
QuickTime Sound (HTML)
QTMRF04: Explains what the sowt and the twos format is in QuickTime.
QuickTime 1995-05-01
QuickTime Supported YUV Pixel Formats (HTML)
QA1060: Describes which YUV pixel formats are supported by QuickTime.
QuickTime 2001-07-19
QuickTime Toolbox GetMovieTime Call (HTML)
QTMTB38: Provides the calls to change the current time and to reposition a movie to play from the start.
QuickTime 1995-05-01
Retrieving Audio from QuickTime Files (HTML)
QTMTB30: Describes how to retrieve audio from QuickTime files in 1 second chunks.
QuickTime 1995-05-01
Sample code for allocating an amount of dictionary space (HTML)
HW71: Discusses the allocation and the setting of memory for Dictionary space in Open Firmware.
QuickTime 1999-10-11
Saving changes to modified movies (HTML)
QTMTB60: Describes how to ensure any changes made to a movie are saved.
QuickTime 2000-09-05
Saving playback hints in a Movie (HTML) ()
QA1194: Demonstrates how to use the SetTrackLoadSettings function to save the hintsHighQuality playback hint in a movie.
QuickTime 2002-09-04
Saving QuickTime Movie Files (HTML) ()
QTMTB47: Explains a few complications one might face in creating and saving QuickTime movie files.
QuickTime 1997-01-31
Sequence Grabber - Determining the capture resolution of an IIDC device (HTML)
QA1403: Discusses how to determine the resolution of a captured image from an IIDC device
QuickTime 2005-01-06
Sequence Grabber - Ensuring the SG TimeBase is being driven by the Sound Clock. (HTML)
QA1314: Ensuring the Sequence Grabber TimeBase is being driven by the Sound Clock when recording audio and video.
QuickTime 2003-10-24
Sequence Grabber - How do I save user settings as CFPreferences? (HTML)
QA1286: Saving UserData settings returned from the Sequence Grabber as CFPreferences.
QuickTime 2003-09-04
Sequence Grabber - How often should I call SGIdle? (HTML)
QA1349: This Q&A discusses how often SGIdle should be called when capturing using the Sequence Grabber.
QuickTime 2004-04-06
Sequence Grabber - Setting the sound channel play through state (HTML)
QA1303: Setting the Sound play though state when previewing and recording a sound channel with the Sequence Grabber.
QuickTime 2003-09-23
Sequence Grabber - Using the SGDataProc for Sound (HTML)
QA1348: This Q&A discusses how you can use a Sound SGChannel with the Sequence Grabber DataProc
QuickTime 2004-04-06
Sequence Grabber - 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 2004-08-25
Sequence Grabber Source, Video, and Channel Bounds (HTML) ()
QA1250: Explains the QuickTime Sequence Grabber's relationship between the Source, Video, and Channel Bounds when capturing video.
QuickTime 2003-07-16
SetSoundMediaBalance balance parameter clarification (HTML) ()
QTMTB49: Describes correct parameter values for the SetSoundMediaBalance routine.
QuickTime 2004-12-01
Setting a Movie's Clipping Region (HTML)
QTMTB23: Explains why ShowMoviePoster doesn't honor the clipping region when clipped to the cell size.
QuickTime 1995-05-01
Setting Export Quality (HTML)
QTMCC13: Demonstrates how to change the compression factor when exporting a JPEG file.
QuickTime 1999-12-06
Setting Sequence Grabber Sound Input Device Driver Parameters (HTML) ()
QA1204: Setting sound input device driver parameters for QuickTime sequence grabber audio channels.
QuickTime 2002-10-25
Setting the movie background color (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
Setting the preferred CMM programatically? (HTML)
QA1086: Uses the NCMConcatProfileSet structure to specify the CMM to be used to make the CMWorldRef with the NCWConcatColorWorld function.
QuickTime 2001-10-24
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) ()
QA1109: Discusses the similarity field of the CodecCompressParams structure used in ImageCodecBandCompress to implement key framing during compression.
QuickTime 2002-01-16
spatialQuality Values with Lossy Compression (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
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) ()
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) ()
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) ()
QA1192: Describes why using the cmpWantsRegisterMessage flag is not recommended on Mac OS X.
QuickTime 2003-03-11
Using Custom Color Tables (HTML) ()
QTW93: Use a custom 236-color table for 8-bit movies with QuickTime 3 for Windows.
QuickTime 1998-09-21
Using Mac Toolbox routines Under Windows 98/95/NT (HTML) ()
QTW87: Some Macintosh Toolbox functions are available with QuickTime 3 for Windows.
QuickTime 1998-09-21
Using Mac-style Resources (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) ()
QA1152: Using the CanQuickTimeOpenFile function in a Navigation Services filter to display files that QuickTime can open.
QuickTime 2002-07-15
Using QTSetAtomData (HTML) ()
QA1231: Explains what QTSetAtomData does with the data passed into it.
QuickTime 2003-01-14
Using QuickTime to access MP3 ID3 Tags (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 QuickTime for Java libraries on OS X (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 Output Components - Implementing QTVideoOutputGetIndSoundOutput on Mac OS X (HTML) ()
QA1206: Describes how to support the QTVideoOutputGetIndSoundOutput function in Mac OS X.
QuickTime 2002-10-29
Video Output Components - QTVideoOutputGetIndImageDecompressor (HTML) ()
QA1226: Discusses the QTVideoOutputGetIndImageDecompressor call.
QuickTime 2003-01-03
Viewing multi-page PDF files (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) ()
QA1183: Describes how to select the correct value for the depth field of an image description.
QuickTime 2002-08-15
What is SetMovieDefaultDataRef? (HTML) ()
QTMTB48: Describes the routine SetMovieDefaultDataRef and includes sample code showing how to use it.
QuickTime 1997-03-14
What is the "dump" word and how do I use it? (HTML)
HW68: Describes the function of the Open Firmware word "dump" and how it can be used.
QuickTime 1999-10-11
What numeric base is the default for the Open Firmware user interface? (HTML)
HW65: Describes how the default numeric base used by the Open Firmware user interface is hexadecimal.
QuickTime 1999-10-11
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? (HTML)
QTW100: Describes where to place QuickTime extension files on Win 95/98/2000/NT systems.
QuickTime 2000-09-05
Why does my identity matrix look strange? (HTML) ()
QA1227: Discusses the MatrixRecord structure and QuadToQuadMatrix function.
QuickTime 2003-01-15
Accessing HTTPS Proxy Settings (HTML) ()
QA1234: Describes how to programatically access Secure Web Proxy information.
Security 2003-02-19
Be careful when using AuthorizationCreate (HTML) ()
QA1172: Explains why you should avoid determining allowable rights when creating an AuthorizationRef.
Security 2002-09-20
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) ()
QA1176: Lists tools available for looking at the network packets on the wire.
Security 2004-07-13
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 2001-03-13
Security Credentials (HTML) ()
QA1277: Discusses AuthorizationCopyRights and the relationship between Authorization Services, authorization sessions, Security Server, credentials, and the credentials cache.
Security 2003-08-06
Stay away from custom Authorization dialogs (HTML) ()
QA1199: Explains why you shouldn't create a custom authorization dialog.
Security 2002-09-20
What are snag keys in Open Firmware? (HTML) ()
HW35: Explains Open Firmware snag keys, including examples of their function.
Security 1999-02-15
What numeric base is the default for the Open Firmware user interface? (HTML)
HW65: Describes how the default numeric base used by the Open Firmware user interface is hexadecimal.
Security 1999-10-11
Changing Size of sfnt Cache (HTML) ()
TX11: Describes how to change the size of the sfnt fragment cache.
Text & Fonts 1998-04-12
Converting to Precomposed Unicode (HTML) ()
QA1235: Describes how to convert a string to precomposed Unicode.
Text & Fonts 2003-02-07
Creating Double-byte Bitmap Fonts (HTML) ()
TX10: Some information about converting to the 'NFNT' and 'sbit' font formats.
Text & Fonts 1998-02-10
dlsDelta field in PRAM's time zone MachineLocation record (HTML) ()
OPS21: Explains how to access and preserve the Daylight Savings state when changing the GMT.
Text & Fonts 2001-03-26
grayishTextOr and Mac OS 8.5 (HTML) ()
Deprecated - QD59: Explains why text drawn using TextMode(grayishTextOr) is never drawn; provides a workaround.
Text & Fonts 1998-12-07
Improving ATSUI Text Drawing Performance (HTML)
QA1027: Talks about one way of improving ATSUI text drawing performance.
Text & Fonts 2001-04-17
IsCmdChar (HTML) ()
TX12: Describes the routine IsCmdChar, which is useful when testing for Command-period and command-AnyCharacter.
Text & Fonts 1998-07-06
Locating a Font's Home File (HTML) ()
Deprecated - TB18: Lists the steps necessary to find the home file of a given font.
Text & Fonts 1996-02-15
QDFlushPortBuffer (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
Translating Postscript font file names (HTML) ()
TX09: Describes how to translate a font name to a Postscript font file name.
Text & Fonts 1997-11-17
Can't attach during two-machine debugging with GDB (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
Changing the TCP Window Size (HTML)
NW47: Describes how to change the TCP window size in Open Transport.
Tools 1997-03-14
Correcting a PackageMaker version.plist and BundleVersions.plist problem (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 2003-10-08
Debugging arbitrary applications with Xcode (HTML)
QA1305: Debugging an application with Xcode without requiring the project that built the application.
Tools 2003-09-15
Detecting Macsbug (HTML)
PLAT30: Explains how to detect whether MacsBug or another debugger is loaded and provides a code snippet.
Tools 1997-05-01
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
Diagnosing a Hang in vSyncWait (HTML) ()
PLAT18: Gives tips for diagnosing a hang in the vSyncWait loop.
Tools 1996-02-15
Disabling a Processor on a Multiprocessor System (HTML) ()
QA1141: Describes how to disable a processor on a multiprocessor system for testing purposes.
Tools 2002-05-22
Documentation updater for Project Builder shipping with Mac OS X 10.2 (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) ()
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
Generating an NMI Without a Programmer's Switch (HTML) ()
QA1264: Explains how to generate a non-maskable interrupt (NMI) on CPUs without programmer's switches.
Tools 2004-04-26
Getting owner and group name references for PackageMaker package contents (HTML) ()
QA1285: Describes how to get owner and group name references for PackageMaker package contents.
Tools 2003-08-25
How to solve '_objc_exception_set_functions' ZeroLink errors in Xcode (HTML)
QA1321: Explains how to eliminate '_objc_exception_set_functions' ZeroLink errors in Xcode
Tools 2003-10-29
Library naming conventions for proper building and linking with the Mac OS X Developer Tools (HTML)
QA1101: Describes the library naming conventions required by the Mac OS X Developer Tools to properly link against your libraries.
Tools 2001-12-20
PackageMaker's NeedsAuthorization value causes install to fail (HTML) ()
QA1283: Provides a workaround when PackageMaker's NeedsAuthorization value causes a Mac OS X 10.1 installation failure.
Tools 2003-08-25
Programmatically causing restart, shutdown and/or logout (HTML) ()
QA1134: Describes how to programmatically cause restart, shutdown, sleep or logout.
Tools 2003-02-10
Project Builder 2.1 needs projects to be checked into CVS to enable CVS support (HTML) ()
QA1245: Explains how to workaround a bug in Project Builder that blocks CVS functionality.
Tools 2003-03-20
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.
Tools 2003-10-21