QuickTime video codec type

Overview

Containing profile atom: Track (video), movie
part-ID: 0x20202020 (universal feature)
feature-code: 'vfmt'
feature-value: Unsigned int(32) (a four-character-code) holding the QuickTime video codec type copied from the ImageDescription structure’s cType field

Feature Values

This is the four-character-code found in a video sample description.

Examples: 'mp4v', 'jpeg'.

Writer Responsibilities

A writer of the QuickTime video codec type feature should record the four-character code corresponding to the QuickTime video format type or types also recorded in the video track’s sample descriptions.

Feature Value Algorithm

The feature value is the video codec type read from a QuickTime ImageDescription’s cType field. If there are multiple sample descriptions with different video codec types, multiple video codec type features should be recorded in the profile atom.

Reader Responsibilities

A reader of this feature code should compare the recorded value by an equality comparison (using =) with the format codes supported by the reader.