QuickTime container

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VLC can encode and decode this container.
The module name to use at the command line is mp4, but you can also use mov, or 3gp.

QuickTime natively uses this container (described as QuickTime File Format by Apple), which can store other data, including video, audio and text. The advantage of this container format is the separation of data from metadata: writes to metadata do not necessitate a re-write of the entire media file. QuickTime video files have the extension .mov (presumably for movie) or .qt (presumably for QuickTime).

The QuickTime container was made into a standard "ISO base media file format", the basis for MPEG-4 (part 14) and 3GP.

Source code