locking keyframes to markers ?

[Matthew Tully]

you should make a null and attach as many sliders as you have properties to change each time, this way you only have to edit one set of keyframes.

Not sure if this helps, could you explain the problem a little more?

[Dan Ebberts]

Assumptions: Each map is its own comp; the map comps are all in another comp named “master”; there are exactly two linear keyframes for each keyframed property; the markers are applied to the map comp layers in the master comp; the map comp layers in the master comp have not been renamed. Then, applying this expression to each keyframed property should do the trick:

L = comp(“master”).layer(thisComp.name);
if ((L.marker.numKeys > 1) (&& numKeys > 1)){
t1 = L.marker.key(1).time;
t2 = L.marker.key(2).time;
v1 = valueAtTime(key(1).time);
v2 = valueAtTime(key(2).time);
linear(time,t1,t2,v1,v2)
}else{
value
}

If your setup is different, the expression will need to be revised. 🙂

Dan

[Alex Dinnin]

ok.. Thanks for the help so far.. but I don’t think I really explained myself.
I have a big resolution map, which I have a route going from A to B, using stroke. I have a triangle following the stroke (copied the path onto the position) to look like a pointer. As the Pointer gets near to B the name appears. I then precomp this into a Pal 16:9 comp which I animate the position.

this is basically the run down.

frame 10 : stroke starts, triangle starts.

frame 100 : place name opacity 0%

frame 110 : place name opacity 100%, end stroke.

the durations of the maps change.. some are 90 frames some are 120 etc etc.. however the setup is always the same. The first keyframe is at 10 frames.. What I want to be able to do is have a marker which the end two keyframes follow.

I have about 80 of these maps to do, so it would be fantastic if I could just move two end markers.. and the end keyframes follow..

I hope this makes a bit more sense..

thanks for your help already

regards

Alex

[Dan Ebberts]

OK – now assume that you have a layer in the comp named “Layer With Marker”, where the marker is. Then try this:

L = thisComp.layer(“Layer With Marker”);
if ((L.marker.numKeys > 0) && (numKeys > 1)){
t1 = key(1).time;
t2 = L.marker.key(1).time;
v1 = valueAtTime(key(1).time);
v2 = valueAtTime(key(2).time);
linear(time,t1,t2,v1,v2)
}else{
value
}

Dan

[Alex Dinnin]

Hi Dan,

Thank you so much.. It took me a while to work out how it was working.. and then a bit longer to tweak it..

But it works like a charm now.. thanks very much for you help

Alex

[Ali Asgari]

dear friend
I have similar problem
I’m working on a project and I have to import many sequences with own markers from primiere to after effects . I want to camera keyframe change to marker automatically . I tried to change your expression and change it for my project but I failed . may you help me .
thanks in advance and sorry for my bad english

[Alex Dinnin]

I’m sorry. I don’t really understand what you Nader to do.

Could you try and explain a bit more ?

[Ali Asgari]

I want to my camera keyframe position move base on markers of a layer .
your expression worked finally with two keyframe. I tried to change and adopt it for more than two keyframe. but I got warning .
I changed your expression this way

L = comp(“master”).layer(thisComp.name);
if ((L.marker.numKeys > 1)){
t1 = L.marker.key(1).time;
t2 = L.marker.key(2).time;
t3= L.marker.key(3).time;
v1 = valueAtTime(key(1).time);
v2 = valueAtTime(key(2).time);
v3= valueAtTime(key(3).time);
linear(time,t1,t2,t3,v1,v2,v3)
}else{
value
}

and I got attached warning.
many thanks for your help.

<a href="https://images.creativecow.net/300638/attachment.jpg"><img src="https://i1.creativecow.net/u/300638/attachment.jpg" border="0" /></a>

[Dan Ebberts]

linear() only works for two values. I think you need something more like this:


L = comp("master").layer(thisComp.name);
if ((L.marker.numKeys > 2) && (numKeys > 2)){
t1 = L.marker.key(1).time;
t2 = L.marker.key(2).time;
t3= L.marker.key(3).time;
v1 = valueAtTime(key(1).time);
v2 = valueAtTime(key(2).time);
v3= valueAtTime(key(3).time);
if (time < t2){
linear(time,t1,t2,v1,v2);
}else{
linear(time,t2,t3,v2,v3);
}
}else{
value
}


Dan

[Ali Asgari]

you are great
it worked .
many thanks.
and can I expand the expression for more key frames?