## QMedia v1.5 | ## Introducing QuickTime

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## Standard Movie Properties

Type | The four character MacOS file type of the movie file. Standard QuickTime movies have a file type of MooV. However, QuickTime treats other files (those it can import in place) as movies. Examples of such files are: still images, MPEG files, GIF animations, 3DMF files and many more.
Width and height | The movie's spatial dimensions, measured in pixels.
Sound volume | For movies with sound tracks, the level of the sound volume. The sound volume is in the range of -255 ... 255. A value of 0 means no sound (mute). Negative values also mute the movie, but they preserve the absolute sound volume value.
Rate | The playback rate of the movie. When the movie is stopped, its rate is 0. A value of 1 indicates that the movie is playing forward at normal speed. Negative values mean that the movie is playing in reverse.
Time scale | The basis of the movie's time coordinate system. Specifies the number of time units in a second.
Duration | The length of the movie, expressed in the movie's time scale.
Current time | The current point in the movie, expressed on its time scale.
Current selection | The portion of the movie that is currently selected for editing or playback. Specified by the selection's start time and duration, both expressed in the movie's time scale.
Creation date and time | Set when the movie was created by its author.
Modification date / time | Set when the movie was last modified by its author.
Preferred sound volume | The preferred sound level of the movie, as it was set by its author.
Preferred rate | The preferred playback rate of the movie, set by its author.
Preview | A portion of the movie that presents a short summary of the movie's content. A short dynamic representation of the movie that should give the user some idea of what the movie contains.
Poster | A frame that can be used as a still representation of the movie.
Annotations | A list of user-defined textual data items. Annotations typically hold information about the movie's copyright holders, author, description etc. Each annotation has a type (four character identifier) and a text content.