• Adobe After Effects Expressions

  Controlling Layer in-point with Expressions

  Posted by Roland R. kahlenberg on October 13, 2009 at 5:34 am

  I’ve got 80+ layers that somehow (due to a ‘bug’ in another script) does something really cool if each layer has a different in-point.

  Can AE 7 (or later) control a layer’s in-point? I will need to control the in-points based on a time-referenced conditional statement(s).

  TIA
  RoRK

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  Dan Ebberts replied 16 years, 10 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Dan Ebberts

  October 13, 2009 at 2:23 pm

  You can’t change the in point with an expression, but you could use a time remapping expression to add an offset to the playback time. If you put the ranomizing expression on a slider, you could use the same offset value for the time remapping delay and to set the opacity to zero before the new “in point” and after the new “out point”, which seems like it would have the same effect as actually moving the in point.

  Dan
• 

  Roland R. kahlenberg

  October 14, 2009 at 2:59 am

  /Hi Dan, yes I was thinking of the Time Remap thingy we did for broadcastGEMs but with 80+ layers I was hoping for a more elegant solution. But it looks like it’s worth a shout now.

  On a side note, is it possible to convert Corner Pin data into X and Y rotation data? I’m thinking of converting tracked data into 3D orientation/rotation data cos these are more useful in real-world scenarios.

  I think Corner Pin data from trackers is a baggage from days when compositors were not 2.5/3D savvy – sounds like a job for Space Transformation?

  Cheers
  RoRK

  Sell your AEPs with broadcastGEMs’ DVD series of templates. Click here for more
• 

  Dan Ebberts

  October 14, 2009 at 3:14 am

  I think the math would be pretty complex for something like that. Beyond what you’d want to attempt with an expression, I’d guess.

  Dan

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