• Compression Techniques

  Pulldown from 23.976

  Posted by Rich Rubasch on September 8, 2013 at 5:18 pm

  I did some tests on a 23.976 sequence going to 29.97 for broadcast. Using Episode and their telecine framerate settings, no matter what I tried I got the CCCJJ cadence (clean frame, clean frame, clean frame, judder frame, judder frame). The judder frames were combined images with a ghosted image of the talent next to it.

  Playback was obviously juddery and had a rough look to it.

  For giggles I took the 23.976 ProRes HQ clip into QT Player and simply exported to 29.97. Now I got the CCCCDD cadence (clean frame, clean frame, clean frame, clean frame, new frame, duplicate frame).

  It played back perfectly and looked way better than the traditional 3/2 pulldown method with the judder frames. It is a :30 spot so there were no sync problems. Anyone else see this and is there any issue with using Apples pulldown (unconventional as it is) assuming I won’t have to remove the pulldown in the future?

  Rich Rubasch
  Tilt Media Inc.
  Video Production, Post, Studio Sound Stage
  Founder/President/Editor/Designer/Animator
  https://www.tiltmedia.com

  Rich Rubasch replied 12 years, 11 months ago 1 Member · 0 Replies
• 0 Replies

Reply to this Discussion! Login or Sign Up