I am trying to make a simple animation that looks like it's phone scrolling through instagram.
I have created a main 'instagram portrait, duplicated it several times and then added some JPGs to the project and used masks to make them fit within the portrait. (see pic).
Now I want to make the portraits scoll within the boundraies of the phone layer. But it's not working as i hoped.
I have tried all differnent mask settings and moves the screen layer into different positions, but I cannot acheive the desired result.
Pre-compose the scrolling images and mask the result in the parent comp or use track mattes. I strongly suggest you actually read the online help on some basics rather than directly delving into a downloaded template project and modifying it when you really don't know some basics, no offense.
No. What works for one, does not work for another. This is how I like to learn, but doing, asking for help and solving problems when I encounter them.
You are no one to suggest any different.
Of course you may need more than one such matte if you have multiple layers. Similarly, you may naturally need to change your layout to accommodate your scrolling strips in the pre-comp. It simply seems you have locked yourself into that typical beginner thinking of trying to do it all in one comp with as few layers as possible. That's just not going to work. I would really repeat my point: Start by reading the online help on this stuff and then develop a strategy how you want to layout your animation. Many things in AE cannot be understood intuitively by trial & error and clearly you have navigated yourself into a corner here.
Listen, if i wanted advice off of you, it would be how to do some basic After Effects work. Don't tell how I should learn.
FWIW, nothing you have suggested has worked.
Pre-compose your image layers to a towel-strip sized comp, put it into your phone screen comp. Create your screen shape on top, select it as a track matte in the image-based pre-comp layer. Animate the position of the strip. Done. Please do read the online help on the basics.