Leopard Reference Library
This page lists new and recently changed documents, including Articles, Guides, Reference, Release Notes, Sample Code, Technical Notes, and Technical Q&As. Most documents have a revision history, which details additions and changes to that document since the previous version. Look for "Revision History" at the bottom of the document or in the document's table of contents.

Items are listed in reverse chronological order by publication date. To see the list sorted by the type of revision, click Sort by Revision Type. Items published for the first time (First Version) will be at the top of the list, followed by items with new or changed content (Content Update), followed by items with small fixes, such as typos and format errors, but no significant content changes (Minor Change).

New and updated Reference Library documents are announced in the bi-weekly Apple Developer Connection News, available as an option to ADC members. See the Membership Overview page for details on joining.
Document Revision Descriptions
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Topic
2009-01-27 Audio Export - Encoding AAC Audio For MPEG-4 Export (HTML)
Editorial
 Minor Change Technical Notes Audio
2009-04-12 AudioChannelLayout - What's the Audio Channel Order when the Layout has a Channel Bitmap? (HTML)
First Version
 First Version Technical Q&As Audio
2009-01-07 Creating Core Audio Format (.caf) Files (HTML)
First Version
 First Version Technical Q&As Audio
2008-11-05 Playback of QuickTime movie audio through a multi-channel speaker system (HTML)
First Version
 First Version Technical Q&As Audio
2009-01-29 QuickTime Audio - Easy Frequency Level Metering with MovieAudio APIs (HTML)
Editorial
 Minor Change Technical Q&As Audio
2008-11-05 QuickTime Audio - Retrieving the correct audio format bit depth value (HTML)
editorial
 Minor Change Technical Q&As Audio
2009-03-19 QTCarbonShell (HTML) (DMG) (ZIP)
Minor editorial corrections.
 Minor Change Sample Code Carbon
2009-03-16 QTMetaData (HTML) (DMG) (ZIP)
Minor update to StringUtils.c
 Content Update Sample Code Carbon
2009-01-29 QuickTime Audio - Easy Frequency Level Metering with MovieAudio APIs (HTML)
Editorial
 Minor Change Technical Q&As Carbon
2009-04-08 QTCaptureAudioPreviewOutput Class Reference (HTML) (PDF)
Fixed parameter descriptions.
 Minor Change Reference Cocoa
2009-05-06 QTCaptureConnection Class Reference (HTML) (PDF)
Fixed constant listings. Minor fixes.
 Minor Change Reference Cocoa
2009-03-04 QTCaptureDecompressedVideoOutput Class Reference (HTML) (PDF)
Added four new method descriptions; updated availability information.
 Content Update Reference Cocoa
2009-05-06 QTCaptureDevice Class Reference (HTML) (PDF)
Fixed enumeration and constant listings. Minor fixes.
 Minor Change Reference Cocoa
2009-04-08 QTCaptureDeviceInput Class Reference (HTML) (PDF)
Minor fixes.
 Minor Change Reference Cocoa
2009-04-08 QTCaptureInput Class Reference (HTML) (PDF)
Minor technical fixes.
 Minor Change Reference Cocoa
2009-04-06 QTCaptureLayer Class Reference (HTML) (PDF)
Added parameter descriptions. Minor fixes.
 Minor Change Reference Cocoa
2009-03-04 QTCaptureMovieFileOutput Class Reference (HTML) (PDF)
Minor edit fixes.
 Minor Change Reference Cocoa
2009-03-04 QTCaptureOutput Class Reference (HTML) (PDF)
Minor edit fixes.
 Minor Change Reference Cocoa
2009-03-04 QTCaptureVideoPreviewOutput Class Reference (HTML) (PDF)
Minor edit fixes.
 Minor Change Reference Cocoa
2009-04-08 QTCaptureView Class Reference (HTML) (PDF)
Modified descriptions. Fixed typos. MInor fixes.
 Minor Change Reference Cocoa
2009-04-08 QTCompressionOptions Class Reference (HTML) (PDF)
Fixed constant listings. Minor fixes. Verification of method descriptions.
 Minor Change Reference Cocoa
2009-04-07 QTCoreVideo202 (HTML) (DMG) (ZIP)
Performance improvement with movie pixel buffersand streaming textures.
 Minor Change Sample Code Cocoa
2009-04-07 QTCoreVideo301 (HTML) (DMG) (ZIP)
Fixed an issue with shader units that caused an OpenGL error.
 Content Update Sample Code Cocoa
2009-04-08 QTDataReference Class Reference (HTML) (PDF)
Added parameter descriptions, updated constant listings. Minor fixes.
 Minor Change Reference Cocoa
2009-04-08 QTFormatDescription Class Reference (HTML) (PDF)
Fixed constant listings, parameter descriptions. Updated availability information. Minor fixes and clarification of attributes.
 Minor Change Reference Cocoa
2008-10-13 QTKit Capture - Disabling specific audio channels when recording (HTML)
First Version
 First Version Technical Q&As Cocoa
2008-09-16 QTKit Capture - Video Compression Options And Preview (HTML)
First Version
 First Version Technical Q&As Cocoa
2009-05-06 QTKit Functions Reference (HTML) (PDF)
Fixed and updated function listings. Minor fixes.
 Minor Change Reference Cocoa
2009-03-04 QTMedia Class Reference (HTML) (PDF)
Added parameter descriptions and constant groupings.
 Minor Change Reference Cocoa
2009-01-07 QTMovie Class Reference (HTML) (PDF)
Corrected the description of QuickTime VR attribute. Minor typo fixes.
 Minor Change Reference Cocoa
2009-04-06 QTMovieLayer Class Reference (HTML) (PDF)
Fixed warning information. Added parameter descriptions. Minor fixes.
 Minor Change Reference Cocoa
2009-04-08 QTSampleBuffer Class Reference (HTML) (PDF)
Fixed constant listings. Updated links. Minor fixes.
 Minor Change Reference Cocoa
2009-03-04 QTTrack Class Reference (HTML) (PDF)
Fixed constants listings; minor edits.
 Minor Change Reference Cocoa
2009-01-29 QuickTime Audio - Easy Frequency Level Metering with MovieAudio APIs (HTML)
Editorial
 Minor Change Technical Q&As Cocoa
2009-04-29 Supplying codec-specific options within the Standard Compression Dialog (HTML) (日本語 HTML)
Editorial Corrections
 Minor Change Technical Notes Compression & Decompression
2009-04-07 QTCoreVideo202 (HTML) (DMG) (ZIP)
Performance improvement with movie pixel buffersand streaming textures.
 Minor Change Sample Code Graphics & Imaging
2009-04-07 QTCoreVideo301 (HTML) (DMG) (ZIP)
Fixed an issue with shader units that caused an OpenGL error.
 Content Update Sample Code Graphics & Imaging
2008-11-20 Video Digitizers - Adding Clean Aperture and Pixel Aspect Ratio Information (HTML)
Editorial
 Minor Change Technical Q&As Graphics & Imaging
2008-11-20 Video Digitizers - Adding Clean Aperture and Pixel Aspect Ratio Information (HTML)
Editorial
 Minor Change Technical Q&As Hardware & Drivers
2009-04-30 Exporting Movies for iPod, Apple TV and iPhone (HTML)
Editorial Updates
 Content Update Technical Notes Import & Export
2009-03-16 Movie export with AAC or AMR audio formats (HTML)
Updated licensing requirements
 Content Update Technical Q&As Import & Export
2009-03-30 QuickTime Media Optimization Properties (HTML)
Minor Change Technical Q&As Import & Export
2008-11-19 Apple JavaScript Coding Guidelines (HTML) (PDF)
Removed a related documents link to a document that no longer exists.
 Minor Change Guides Internet & Web
2008-10-15 HTML Scripting Guide for QuickTime (HTML) (PDF)
Corrected minor typos.
 Minor Change Guides Internet & Web
2008-11-05 Opening a Web page using an HREF track in QuickTime Player (HTML)
Opening a Web page using an HREF track in QuickTime Player
 First Version Technical Q&As Internet & Web
2009-04-21 ASCIIMoviePlayerSample (HTML) (DMG) (ZIP)
Minor Update
 Minor Change Sample Code Movie Basics
2009-03-16 QTMetaData (HTML) (DMG) (ZIP)
Minor update to StringUtils.c
 Content Update Sample Code Movie Basics
2009-01-29 QuickTime Audio - Easy Frequency Level Metering with MovieAudio APIs (HTML)
Editorial
 Minor Change Technical Q&As Movie Basics
2009-03-30 QuickTime Media Optimization Properties (HTML)
Minor Change Technical Q&As Movie Basics
2009-01-27 Audio Export - Encoding AAC Audio For MPEG-4 Export (HTML)
Editorial
 Minor Change Technical Notes Movie Creation
2008-09-16 QTKit Capture - Video Compression Options And Preview (HTML)
First Version
 First Version Technical Q&As Movie Creation
2009-03-30 QuickTime Media Optimization Properties (HTML)
Minor Change Technical Q&As Movie Creation
2009-04-29 Supplying codec-specific options within the Standard Compression Dialog (HTML) (日本語 HTML)
Editorial Corrections
 Minor Change Technical Notes QuickTime Component Creation
2008-11-20 Video Digitizers - Adding Clean Aperture and Pixel Aspect Ratio Information (HTML)
Editorial
 Minor Change Technical Q&As QuickTime Component Creation
2009-03-16 Movie export with AAC or AMR audio formats (HTML)
Updated licensing requirements
 Content Update Technical Q&As QuickTime for Windows
2009-04-29 Supplying codec-specific options within the Standard Compression Dialog (HTML) (日本語 HTML)
Editorial Corrections
 Minor Change Technical Notes QuickTime for Windows
2008-10-15 HTML Scripting Guide for QuickTime (HTML) (PDF)
Corrected minor typos.
 Minor Change Guides Scripting & Automation
2009-04-07 QTCoreVideo301 (HTML) (DMG) (ZIP)
Fixed an issue with shader units that caused an OpenGL error.
 Content Update Sample Code Video Effects & Transitions