I need suggestions for flying bird

I need suggestions for flying bird

Created by Dallas_Sp
2 Years Ago
July 14, 2018 @ 9:31 am
Two questions related to a flying bird:

1. What would be the best AE way/ tool to use isolate a flying bird (flying over a forest) in a video so that I can make it look like it is flying over a different object (building?)

I know there must be something more automated than rotoscoping each individual frame, point by point. It's the best only option I can figure out because the bird's wings have way too much movement, disappear and reappear as he flaps his wings, etc...

I've watched the carrot bowl video, the Beginners Tutorials, one about planars, special effects for bullets, lava, etc... but none seem to be what I'm looking for specifically.

2. As I've been rotoscoping, some of the white feather wing tips, or white head of the bird blend into the blue sky and the roto tool can't see them, so they're not being isolated with the rest of the bird. I can see those particular wingtips or head in the original, but there's just not enough differentiation for it to automatically pick it up even when I highlight the area. Any suggestions?
2 Years Ago
July 14, 2018 @ 11:32 pm
Hi @Dallas_Sp,

I assume you are the one who asked me this very question on YouTube?

To avoid answering everything twice, I'm going to continue our conversation here.

If the bird is against blue / clean background you could try to key it out with a Luma / Colour key or an extract effect

I don't have any specific tutorials for it, but they are actually pretty easy to use. You just apply them and click on the colour you want to remove. Then you can tweak the effect settings to try to remove only the parts of the footage that you want.

If the bird is overlapping with background that is dark and similar colour / pattern / shape to the bird, then the only option you will have is a frame-by-frame rotoscoping job unfortunately. In that case it might be worth trying to get a better shot to work with, get some stock footage of a bird flying or potentially model and animate a bird in 3D to use.

Even the Rotobrush is not perfect. It simply tries to guess the movement of the shape frame by frame and help with rotoscoping. But if the foreground and background blend together a lot (to a point where even humans would have problems distinguishing the two), it'll likely just get confused.

You may be able to get a cleaner rotoscoping done using something like Mocha AE. It's included for free in After Effects and for that I even have a tutorial:

2 Years Ago
July 23, 2018 @ 4:40 am
Yes, it's me (the same person.) I went on vacation but am back now.

I can't begin to tell you how much I appreciate your videos and how the step by step is so logical, as well as fun to watch.

I have linked to an image of screen shots to explain my questions. (A picture is worth 1000 words, right?!)

First you will see a screenshot of what I see while trying to rotoscope. My ultimate goal of the project is to remove the flying eagle in the video and replace the background (with a building jpg.)

Then my questions are as follows.

1. Rotoscoping is creating a mess of a blurry cloud in some areas. As I'm trying to find a way to clean it up, I discovered Motion Blur > Decontaminate, but it wants me to Turn Off Alpha Boundry Mode.

a. Where is that?

b. Is decontamination the easiest way to clean it up?

2. Somehow while trying to zoom in on the eagle for the screenshot I clicked something that removed everything that was not rotoscoped.

a. How do I get it back so that I can see the original background/sky?

b. Where did the little bar with the options under the blue time ruler go that allows you to toggle to view the pink background, see rotoscoping lines, etc...?

c. What did I do to make that happen? (I do it often and it's very frustrating.)

3. I assume that I can replace the grid/grey checkered background with my jpg of the new background (building)

a. If I want to add the background in a different program, can I save it as just the checkered background, then use it like a green screen in the new program? Is there a specific way I need to save it?

4. Regarding your previous answer:

a. Are Luma, Extract, and Colour Key the same thing? If not, where do I find Extract and Luma?

I've been using Colour Key, which works "okay," but on light blues and other colors, but I can't always adjust it enough to avoid also removing parts of the eagle. (Like light blues might remove the eagle head, even at a very low change in color tolerance.)

b. In one of the videos you mentioned there is away to "protect" an area from the color key changes, but I didn't catch how to do that or remember which video it was in. (Like the light blue I mentioned above that will remove the eagle's head.)

I'm going to try masking then animating the eagle like you taught in Beginners-3. Perhaps then I can use color key and rotoscoping to remove the colors needed only around the unmasked part.

Thank you so much in advance for your answers and explanations!


2 Years Ago
July 23, 2018 @ 10:38 am
I don't see how to edit my question/ comment above, so I will ask this separately.

As directed in Beginners-1 to save a composition, I am choosing "Add to Render Cue" but the box to that pops up to the right in your video (where you can choose what format to Save As, does not pop up. It "did" show up on the first couple of practice videos that I created, but I must've clicked the wrong thing because it no longer appears.

I can, however see different options in the panel at the bottom of the screen, but I don't see where to change the format.

How can I get it to show up at the top like it does in your video? (It's so much easier and logical that way!)

Screen shot: https://drive.google.com/file/d/1FzA8rCt2Rv98FOxIYeKjn1zbCTtUcOhV/view?usp=sharing
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