AVFoundation
AVFoundation is a comprehensive framework in Apple's ecosystem for working with audiovisual media on iOS, macOS, tvOS, and watchOS. It provides high-level APIs for capturing, processing, synthesizing, controlling, and playing audio and video content, enabling developers to build rich media applications. The framework handles complex tasks like media asset management, playback synchronization, and real-time audio processing.
Developers should learn AVFoundation when building media-intensive applications for Apple platforms, such as video editors, audio recorders, camera apps, or streaming services. It is essential for implementing features like custom camera controls, audio mixing, video playback with subtitles, or real-time filters, as it offers fine-grained control over media pipelines that higher-level frameworks like UIKit or SwiftUI do not provide.