• Adobe After Effects

  Super 8 footage, time stretch problem

  Posted by Steve Bell on June 1, 2007 at 8:33 am

  Hi, im trying to time stretch some Super 8 footage which I have been given as Pal quicktime.

  The problem is every 3 frames there is one duplicate frame. So when you stretch this in after effects say 400%, that one duplicate frame now becomes 4 frames which results in a noticeable stutter.

  Is there any way of removing this 4th duplicate frame in after effects? so i can slow things down without the stutter.

  Any help much appreciated!

  Thanks

  Steve

  Steve Roberts replied 18 years, 11 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Steve Roberts

  June 1, 2007 at 12:53 pm

  You can try applying time remapping, then add two keyframes that cause the playback to skip the extra frame. Then you add a loop expression (with “offset” instead of “cycle”) that causes the playback to repeat that skipping through the comp. You might have to delete the very last keyframe.

  You’ll probably have to tweak things, but it does work.
• 

  Steve Bell

  June 1, 2007 at 1:20 pm

  Thanks for the advice.

  Ive discovered that some of them appear every 2 frames and that these are randomly placed.

  I have placed markers in my sequence where the dupes appear, is it possible to have an expression that will skip a frame wherever ive placed a marker on the layer?

  Thanks again
• 

  Steve Roberts

  June 1, 2007 at 2:12 pm

  Yes, you can access markers with expressions. Hmm …
  Here’s something related (sort of):
  https://www.creativecow.net/show.php?forumid=1&page=/articles/ebberts_dan/audio_sync/index.html

  I think you’ll need the expression to let the time remap value increment by one normally, but increment by 2 when you hit a marker. The problem is, I don’t think AE can store values in memory and know how many frames we’ve skipped so far (to keep on track). As afr as I know, it can only read what is being asked at the current frame.

  … but if you post in the Expressions COW, you might get the expression you need faster, and this is getting beyond my meagre (current) expression skills anyway. 🙂

  Just thinking …
  Has pulldown been applied to your footage? Can you interpret the footage and remove it?
  If the 8mm footage wasn’t shot at 24fps, you could be in for a bunch of manual keyframing with the time remapping.

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