when rendering in a separate process, ensure that the FFREnder process runs below normal priority as well. If the processes insist on being important, degrade them even to a lower priority. Just in case: take a thread away from them. It shouldn't be necessary, it's rude, but in the end it's YOUR puter. Your mouse should move freely, and you should be able to watch movies and youtube and read tutorials while waiting for de renderer to finish.

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Usually I'm wrong. But to be effective and efficient, I don't need to be correct or accurate.

visit www.aRtBeeWeb.nl (works) or Missing Manuals (tutorials & reviews) - both need an update though