What is the best video format for Ai?

Ai’s own AiM format is always the best choice in terms of reliability, performance and image quality.

The AiM codec provides high resolution playback of very large files with up to 24 bit colour, including Alpha transparency and embedded stereo audio.

AiM files can be encoded either using Ai’s built in media transcoder or externally using the Adobe or QuickTime plugins in a compatible software.