I can only comment on my NLE


I can only comment on my NLE which is Sony Vegas Pro. Unless I tell it to do otherwise, it plays back directly from the timeline (i.e. the hard drive(s) where the file(s) is/are stored). Unlike some other NLEs, no pre-rendering is done. Depending on the speed of your processor and graphics card, this may reduce the quality of your video on playback. Renders are fine but if you have an FX heavy timeline it will reduce quality and playback speed.


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