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...> The track order also determines the display order. "Lower numbered > layers are shown on top of higher-numbered layers. This layering order > is important mainly when multiple video tracks are combined though > graphics modes." (see > http://developer.apple.com/quicktime/qttutorial/movies.html) There is > also an explicit rendering mode, e.g. to alphablend, dither, blend or > copy a layer on top of another one. > > Further, MPEG/QuickTime has an explicit "alternate group ID". This ID > defines tracks that belong to the same group and can thus only be...

...that numbers its tracks. The track order also determines the display order. "Lower numbered layers are shown on top of higher-numbered layers. This layering order is important mainly when multiple video tracks are combined though graphics modes." (see http://developer.apple.com/quicktime/qttutorial/movies.html) There is also an explicit rendering mode, e.g. to alphablend, dither, blend or copy a layer on top of another one. Further, MPEG/QuickTime has an explicit "alternate group ID". This ID defines tracks that belong to the same group and can thus only be displayed alternately of...

...that numbers its tracks. The track order also determines the display order. "Lower numbered layers are shown on top of higher-numbered layers. This layering order is important mainly when multiple video tracks are combined though graphics modes." (see http://developer.apple.com/quicktime/qttutorial/movies.html) There is also an explicit rendering mode, e.g. to alphablend, dither, blend or copy a layer on top of another one. Further, MPEG/QuickTime has an explicit "alternate group ID". This ID defines tracks that belong to the same group and can thus only be displayed alternately of...

...that numbers its tracks. The track order also determines the display order. "Lower numbered layers are shown on top of higher-numbered layers. This layering order is important mainly when multiple video tracks are combined though graphics modes." (see http://developer.apple.com/quicktime/qttutorial/movies.html) There is also an explicit rendering mode, e.g. to alphablend, dither, blend or copy a layer on top of another one. Further, MPEG/QuickTime has an explicit "alternate group ID". This ID defines tracks that belong to the same group and can thus only be displayed alternately of...