Apple Motion 5.1.1 - Manual (Page 169)

Chapter 6 Create and manage projects 169
In the following example, the same image is imported with Scale to Canvas Size selected
in Preferences.
The image is scaled—the equivalent of using the Select/Transform tool to scale down the
image in the Canvas while pressing Shift.
3 To observe that the image is merely transformed and has not changed resolution, select the
image file in the Media list, then open the Media Inspector.
The Fixed Width and Fixed Height parameters display the resolution of the original file.
Fixed Width and
Fixed Height parameters
Image sequences
Numbered image sequences store video clips as individual still image files. Each image file has
a number in the filename that indicates where it fits into the sequence. In a film clip that’s been
digitally scanned, each file represents a single frame. In a video clip that’s been converted to an
image sequence, each file contains both fields of a single video frame, with the upper and lower
lines of the image saved together.
Image sequences use the same variety of file formats as still image files. Some of the most
popular formats for saving image sequences include SGI, BMP, JPEG, TIFF, and TGA. Like still
image formats, many of these image sequence formats support alpha channels, which are used
by Motion.
Because image sequences have been around for so long, they remain the lowest-common-
denominator file format for exchanging video across editing and compositing applications.
Although QuickTime is increasingly used to exchange video clips between platforms, image
sequences are still used, especially in film compositing.
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