Render a composition to OMF (Windows only)

You can render a composition to the OMF (Open Media Framework Interchange) format to generate Avid media (or essence) files; these files contain only media —not metadata or project data. Each OMF codec has a fixed frame size and frame rate, depending on the output resolution you choose. Make sure that the composition or render settings are set appropriately: If you use an unsuitable frame size or frame rate, After Effects doesn’t render the file and returns an error displaying the expected frame size or frame rate.

The OMF file format doesn’t support audio, so any audio tracks aren’t exported, but you can output audio tracks separately, if desired.