Fading Up and Down

[Benito Sanz]

select the layers you want to fade, control click, keyframe asistant and choose sequence layer, you can set the time and kind of trasition, though i always do it manually.

[Filip Vandueren]

Here’s the expression for opacity:
You can make an Animation Preset out of it.


fadeTime=0.5; // in seconds
i=inPoint; o=outPoint; h=i+(o-i)/2;
time

'cause it is an expression, it does slow down rendering:
but hey: it fixes the laziness 😉

[Brian Cibula]

🙂 I’d rather sit and watch the render than have to keep making keyframes all the time. 🙂 Besides…what’s an extra minute after a 2 hour render?

Thanks for the tips!!

[Filip Vandueren]

Oops, something went wrong.
if you’re watching the e-mail it should be okay,
but on the website there’s an error because there’s a < character in there, here it is again (for the website):
fadeTime=0.5; // in seconds
i=inPoint; o=outPoint; h=i+(o-i)/2;

time < h ? linear(time, i, i+fadeTime,0,100) : linear(time, o-fadeTime, o,100,00);

[Benito Sanz]

what’s the expresion if you want to fade just the out point of the layer. this is nice very handy filip

[Filip Vandueren]

maybe this is handier:
<code>
fadeInTime=0.5; // in seconds
fadeOutTime=0.5; // in seconds
i=inPoint; o=outPoint; h=i+(o-i)/2;
time < h ? linear(time, i, i+ fadeInTime,0,100) : linear(time, o-fadeOutTime, o,100,00);
</code>
just set fadeInTime=0
also in the last line you can change the two occurences of “linear” to “ease” for a smoother fader.

[Benito Sanz]

the expresion works fine when u want to do a fade in and out but if set the in point to 0 does something estrange, the in point of top layer is ok not visible but in the middle of the layer suddenly the top layer appears and the out point fades fine. dunno anything about expression but this is very handy. do you what happens filip.

thanks.

[Filip Vandueren]

Hey there,

yeah, I didn’t test it. 😯

Here’s the fix, also fixes another bug when you use a really long fadeOut on a short layer.
But make sure that FadeOut+FadeIn length is more than the layerlength!


fi=0; // FadeIn in seconds
fo=1.5; // FadeOut in seconds
i=inPoint; o=outPoint;

(time < i+fi) ? linear(time, i, i+ fi,0,100) : linear(time, o-fo, o,100,00);


BTW: if you see &lt; in the email, that’s supposed to be <