QTKit

QTKit was a framework developed by Apple Inc. for macOS that provided a high-level interface for working with QuickTime media. It was part of the Core Media layer and offered developers a simpler way to integrate multimedia playback and editing capabilities into their applications compared to using the lower-level QuickTime APIs directly. QTKit allowed for the creation of custom media playback UIs, controlling playback, handling different media formats, and accessing media metadata. It was built on top of QuickTime, inheriting its support for a wide range of audio and video codecs. The framework facilitated tasks such as loading media files, displaying video frames, playing audio, and capturing media from devices. QTKit also supported features like time scrubbing, rate control, and volume adjustment. With the introduction of AVFoundation, Apple's more modern media framework, QTKit has been largely superseded. AVFoundation offers a more robust and flexible set of tools for media handling, particularly for iOS development and more advanced media processing tasks. While QTKit was a valuable tool for developers in its time, new projects are generally encouraged to utilize AVFoundation for their media-related needs.