I'm shooting a greenscreen commercial tonight with a Canon 7D and will be editting in XPro 5.8. I will be shooting in 1080P and want to convert to DNxHD for the edit. I will be delivering in SD and web formats.

My question is when is the best stage to convert to DNxHD, right away after ingest or after a downres to SD? Main concern is the effect on the ability to pull a good key.

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