• Adobe After Effects Expressions

  Expression to move forwards one frame triggered by thisComp.marker object

  Posted by James Baron on January 23, 2019 at 1:41 am

  Hi there,

  Im trying to figure out how to apply an expression to a time remap which will advance one frame every time there is a marker in the main comp

  Thanks in advance!

  James Baron replied 7 years, 6 months ago 3 Members · 6 Replies
• 6 Replies

• 

  Brian Holzknecht

  January 23, 2019 at 2:32 am

  Here is something I modified from a previous post I found and it seems to do the trick. Not sure if it’s correct, but it appeared to work for me.

  Brian

  skip = framesToTime(1); // frame skip
m = thisComp.marker;
begin = 0;

  if (m.numKeys > 0){
n = m.nearestKey(time).index;
if (time < m.key(n).time) n--;
begin = n*skip;
}
value + begin
• 

  James Baron

  January 23, 2019 at 2:50 am

  Thanks for your reply Brian! Im getting an expression error running it on time remap though?
• 

  Brian Holzknecht

  January 23, 2019 at 3:06 am

  Hmm… that’s weird. What version of after effects are you using? I’m using 2018 and In my test I made a 2nd comp that I’m using as a source with the time remap on.

  I’m not really an expression guy, but i figured I’d try to help while I’m waiting for some assistance on my question. Lol.

  I’m not at my computer or I’d try to troubleshoot it right now. Sorry.

  Brian
• 

  Dan Ebberts

  January 23, 2019 at 4:13 am

  Something like this should work:

  
m = comp("Main Comp").marker;
n = 0;
if (m.numKeys > 0){
n = m.nearestKey(time).index;
if (m.key(n).time > time) n--;
}
framesToTime(n);


  Dan
• 

  Brian Holzknecht

  January 23, 2019 at 4:34 am

  Your expression skills are so impressive, the help I tried to provide came from one of your posts to someone else… Clearly I need to learn a ton more on expressions.

  Brian
• 

  James Baron

  January 23, 2019 at 10:49 pm

  Perfect Dan!! Thanks a lot for your help Dan and Brian

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