Does rendering improve export?

[Ann Bens]

[John Heiser] ” If your previews are set to a mezzanine codec such as iFrame MPEG, ProResHQ or Cineform, they’re pristine and ready.”

iFrame MPEG is not pristine< its a lesser codec, only to be used when wanting a quick review.

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Adobe Certified Expert Premiere Pro CS2/CS6/CC
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[Todd Perchert]

Export codec and preview codec need to be the same??? Not what I’ve experienced.

I’ve tested this. Preview render on a short :15 sequence resulted in 1/3 of the export time than when I didn’t select to use Preview Renders – both renders to h264 from an AVC Intra 100 sequence with Preview Renders that matched sequence.

Certainly preview and export settings should match for best quality and fastest export, but they don’t need to match to get faster export.
TC

[Michalis Agisilaou]

What if you are shooting both 1080p and 4k? What the sequence will match and how will this affect the export? You can’t just always ‘match sequence’ and ‘use previews’ just to be faster. It’s all situational.