For example, an object may move, rotate or scale to a different size. In LiveMotion, each keyframe indicates one change for one property of one object. In Flash 5, each keyframe contains all changes for all objects in a layer. Each pixel specifies information for one colored dot on the screen. Pixels are displayed sequentially in scan lines or raster lines on a display.
Raster graphics are resolution-dependent.
More pixels are required to avoid this. Raster-based graphics files can be compressed, but beyond a certain point the only way to make them smaller is to compromise image quality at higher resolutions. The term could be misleading, because SWFs are rendered files, designed only to be played, not to be reimported into the program that created them and re-edited. See Macromedia's tech note on this topic. For re-editing purposes, SWF editors store information in proprietary file formats.