ABSTRACT
This chapter discusses specific issues regarding importing different types of footage items – as well as entire projects – into After Effects. Central to handling the footage import is the Interpret Footage dialog, where the user indicates how After Effects interprets and handles source files as it hands their images off to the user comps. Guess means the user want After Effects to take its own best shot at deciding the alpha type. There are two ways to save an image that has an alpha channel: Straight or Premultiplied. After Effects also supports audio. In many cases, audio is embedded in a movie file along with the image, but QuickTime movies can contain just audio. After Effects does not look at the pixels per inch setting for a still image – all it cares about is how many pixels are in it.
