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QuickTime is a multimedia framework developed by Apple that handles various formats of digital video, picture, sound, and other media. It is most prominently known for its file format (with the .mov extension) and the QuickTime Player, a media player application. QuickTime as a multimedia framework. Launched in 1991, QuickTime was a foundational technology for desktop computing that allowed users to record, edit, and play digital video and audio.

Container format: QuickTime's .mov file format is a multimedia container. It stores different media tracks—such as video, audio, and subtitles—in a single file, which makes it ideal for editing. Its object-oriented design and use of "atoms" allowed it to be highly flexible.

Basis for MPEG-4: The QuickTime File Format served as the basis for the international MPEG-4 standard, which is now widely adopted for digital video.

Codec support: The framework supports a variety of media codecs, including H.264, MPEG-4, and AAC.