![]() Suddenly, our single “movie” has three different files: audio, video and captions. ![]() (SCC captions are encoded directly in the video stream itself.) Then, we need to add captions files like SRT or iTT. What we overlook in these conversations is that H.264 or HEVC only compress the video portion of our media. We talk a lot about how to get the best image quality using H.264, or how to get HEVC to compress faster. The media data may be stored in the same file as the QuickTime movie, in a separate file, in multiple files, in alternate sources such as databases or real-time streams, or in some combination of these. ![]() The media data is the actual sample data, such as video frames and audio samples, used in the movie. ![]() The movie resource also contains an index describing where all the media data is stored. The description is called the movie resource, movie atom, or simply the movie, and contains information such as the number of tracks, the video compression format, and timing information. ( Reference link)Īpple provides a more technical description:Ī QuickTime file stores the description of its media separately from the media data. QuickTime files can be recognized by their file name extensions: qt, mov, and moov. QuickTime files combine sound, text, animation, and video in a single file…. QuickTime is a multimedia development, storage, and playback technology from Apple. Or, perhaps, at a deeper level, we think of it as the format into which we compress our movies.īut, recently, a reader asked a question that included the phrase: “I’ll save it as a QuickTime.” As though QuickTime is a “thing.” It isn’t. When it comes to movies, we think of QuickTime as the player in which we watch movies.
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