• Blackmagic Design

  Losing end frames when Pasted into 720p sequence

  Posted by Aaron Neitz on June 2, 2005 at 9:25 pm

  This is my first go at conform from DVCPROHD tapes. I’ve got a finished FCP sequence at SD 29.97 which I Media Managered, Batched the sequence from the HD tapes. Now because my original timeline was 30fps, it put all my 720p media in a 30 fps timeline (which needs rendering). So I start a new 720p sequence at 23.98fps, and copy/paste. Everything falls in, no rendering needed, everything times out to 30 seconds…. but I’d say 30% of my clips in the new sequence have a 1 frame gap at their tails. So I have to trim them back out +1. I’ve checked code, it all matches up correctly so there’s no slip or 29.97 to 23.98 gaps…..

  Any ideas? Did I go through the workflow correctly?

  Adam Levine replied 20 years, 11 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Adam Levine

  June 3, 2005 at 8:51 pm

  Don’t know what the specific problem is here, but it just shows that it is always best to keep your timebase constant throughout the post process. Next time, pull up all the footage before cutting (follow the instructions in Cinema Tools), offline at 23.98, and that way you’re ready to rock for online.

  FWIW, my guess is rounding error when your outgoing cut is on one of the split frames in the 3:2 sequence (by sheer randomness, you would get 40% — 2/5 — of clips having this problem)
• 

  Aaron Neitz

  June 4, 2005 at 4:00 am

  Your guess on rounding errors sounds very likely to me. Luckily there were only 100 clips that I had to go through and slip. Honestly the whole 30fps TC on tape for 23.98 media had me scratching my head for a bit there.
• 

  Adam Levine

  June 6, 2005 at 4:18 pm

  Here’s my workflow, adapted from Warner TV’s Mandated-by-Corporate workflow developed for shows shot on film:

  1) Shoot 24P
  2) Make offline cassetes (I use DVCam these days, 3/4″ in the olden times). This will introduce pulldown into the picture. Either remove pulldown on capture, or use Cinema Tools. If it’s “Advanced” pulldown (e.g., from the Panasonic 24P camera), just use FCP. Or you can capture directly from HD masters using DL RT downconversion to JPEG at 35% quality.
  3) Offline edit at 23.98
  4) Export program as a single QT file with window burn as an “offline cassette” (for double checking errors in Media Manager, etc.
  5) Media Manage for recapturing
  6) Recapture at full resolution
  7) Color, titles, graphics
  8) Lay back
  9) QC
  10) Have a beer or two

  Bottom line is this: cut at the frame rate of your final program. Period.

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