FLI/FLC

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FLI and FLC are lossless animation formats developed by Autodesk. The earlier FLI format is limited to 320x200 pixel, 256 colour animations. FLC can use any resolution but is still limited to 8 bit colour.

The basic method used in both formats is to RLE compress the first frame of a sequence, then only store and display the areas that change in the subsequent frames. This means that the format is well suited to cartoon and CGI animation. However, it does not perform well with video images. The format is chunky, allowing large animations to be played without loading the entire file into memory.

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