All effects in Media Composer can be categorized into two categories: real-time and non–real-time effects. Visual effects use complex mathematical equations to produce their results. Real-time effects are designed to be calculated and displayed as they are played back. Non–real-time effects must be rendered to be played back.
Rendering is a process by which Media Composer calculates (or creates) the effect and writes the resulting image into a video file.
Note: Media Composer refers to effect render files as precomputes—files that have been computed, or calculated, in advance of playback.
Playing back a real-time effect can require tremendous processing power to do successfully. Playing back the render file, on the other ...