Powered by Charbon Studio : color-grading and DCP Mastering.
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• introduction
  • a red r3d 4K shot has been graded in Color, and rendered twice in HD
  • one render is Prores HQ, the other render is Uncompressed 10b 422
• pros of Prores HQ
  • Prores HQ is 6 times smaller
• quality comparison
  • each render has been opened in Photoshop, reframed and zoomed 2x so as to have only a detail
• in pictures
  • show the Prores HQ
  • show the Uncompressed 10b 422
  • show the difference between the 2 (difference compositing)
  
  • note : the difference between Prores HQ and Uncompressed 10b 422 is so small one could think the image does not change
• observations
  • the Prores HQ render and the Uncompressed 10b 422 render are almost identical. Looking very carefully, one could notice the Prores HQ seem to have a touch of less noise
  • this is confirmed by the difference between the two, that is completely dark
• conclusions
  • as a render codec out of color-grading, Prores HQ is very good, all the more so as it is faster to render Prores HQ than Uncompressed 10b 422 (there is 6 times less data to be written on disk)
  • for the sake of porting the comparison on this site, the renders were processed through photoshop, reframed and zoomed. The results are consistant with what I observed on my color-grading station in full quality