►Authoring muvee Styles
▼9 List of primitive effects and transitions
►9.9 Crop Media
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9.9.1 Behaviour of an image with Crop Media enabled
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9.9 CropMedia

User photos in muvee Reveal appear with a gentle pan/zoom effect - also known as "The Ken Burns effect" after the film make Ken Burns who popularized its narrative uses. There are two ways to achieve the pan/zoom on a photo -

  • A. By fixing the visible region of an image and scaling and translating it to show only the regions of interest, and

  • B. By fixing the geometry, but animating the selected region of the image to mimic the pan/zoom.

Both techniques have their uses, but muvee Reveal defaults to using the scaling/translating approach. In some styles such as Scrap book, the geometry of a photo is fixed and we need to perform the Ken Burns effect using approach (B).

The CropMedia effect switches the mode to approach (B) for all elements of the scene that it controls. In that sense, it is not really a visible effect, but a scene presentation setting masquerading as one.

 

Parameters

 

Default

 

Range    

 

Description

 

None

 

 

 

Input pattern: ()
Image-Op: No

9.9.1 Behaviour of an image with CropMedia enabled
; muSE v2
; 
;  My super awesome style.
;  This style desmonstrates the cropmedia effect.
 
(style-parameters)
 
(segment-durations 8.0)
 
(define muvee-global-effect (effect-stack
                                (effect "CropMedia" (A))
                                (effect "Perspective" (A))))
 
(define muvee-segment-effect (effect "Translate" (A)
                                     (param "z" -1.0)))

Our main focus is the global effect. That’s where the CropMedia effect is usually declared. Now, what we’re doing in the segment effect is simply move the user image further in the z-axis by -1.0 units. To fully appreciate the use of CropMedia, run the above style once; Then run it again after deleting the line (effect "CropMedia" (A)). You will then understand what is meant by region of interest.

Do note that many styles declare CropMedia and Perspective as Global Effects. This is a rather standard use of CropMedia and you’re encouraged to adopt it if you need the CropMedia approach.

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