Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

Refining speed changes with the Graph Editor

From: After Effects Apprentice 10: Time Games

Video: Refining speed changes with the Graph Editor

It can be confusing to figure out exactly what Time Remapping is doing just by looking at keyframes down in the Timeline panel. I mean you can go to previous and next keyframes and look at the Time Remap value versus the Comps value, but a better tool to actually understand what's going on is to go into the Graph Editor. Once we do that, we've got some nice lines that actually show how time is progressing. This line indicates time in the source clip, versus time in the overall composition. As we go through here, we can see how time progresses, how now the slope of change of time is now more gradual.

Refining speed changes with the Graph Editor

It can be confusing to figure out exactly what Time Remapping is doing just by looking at keyframes down in the Timeline panel. I mean you can go to previous and next keyframes and look at the Time Remap value versus the Comps value, but a better tool to actually understand what's going on is to go into the Graph Editor. Once we do that, we've got some nice lines that actually show how time is progressing. This line indicates time in the source clip, versus time in the overall composition. As we go through here, we can see how time progresses, how now the slope of change of time is now more gradual.

When the slope goes downwards that indicates that time is going backwards, and going forwards again. This is looking at the default Auto-Select Graph Type, which is the value graph for time-remap: what second of the source is playing at what second of the composition. Perhaps even more interesting is to look at the Speed Graph for time remapping. This actually indicates what's going on speed-wise. The higher the line, the fast we're going. At the very beginning when we we're trying to mimic natural speed, we were going at five seconds of source per second of composition time.

Then when we slowed down, we're traveling at 0.68 seconds of source per one second on the composition, slower than the source clip. When our Time Remap graph goes below the 0 line, we're actually going backwards, minus one second of source per second of comp-- practically going backwards at 100% speed. Then we're going forwards again. If you can't decide which view you prefer, you can also go to Edit Value Graph, because this will be easier doing interpolation with other keyframe adjustments, but then Show Reference Graph, which will show a second ghosted line for what our speed is.

Okay. We're dropping quickly, and then we make a sudden shift here to going in slow motion. I'm okay with that sudden shift, so I'm going to leave that as a Linear keyframe. Then we get to this point in time where we actually turn around. And so we notice when we RAM Preview, this was kind of like a very sudden reversal in speed. This is something I prefer to do as maybe in Easy Ease keyframe, where we come to a stop, then start going backwards. So I'm going to select that keyframe, then choose my handy-dandy button for Easy Ease.

By doing so, we can see that Value Graph gradually comes into here and gradually goes back. We can also see what's happening with our velocity. We have a smoother transition from going forwards to going backwards. I'm going to RAM Preview. And now you see where we have a little bit more of a real dance going on here. If we decide that that pause is a little bit too long, we'll just shorten up these influence handles. I'll hold down the Shift key after I start dragging to keep them level, start dragging this one, hold down the Shift key, get a smooth transition through there, a Linear transition through there.

Then when we bounce here, I think I also want to have a little bit of a rounding here, rather than a sudden jump. I could easy-ease it, I can use the Auto Bezier keyframe to make it smooth, or I can hold down the Option key on Mac, Alt key on Windows, and actually pull out influence handles to go ahead and get the amount of speed change that I want and the amount of smoothing for that keyframe that I want. I'll have the Shift key to keep this level. Let's see what that looks like.

So we slow down, back up, and I think I'm going to go for a shorter influence handle here. So I'll drag, Shift, drag, Shift. I just want a little smoothing through this point. Let's try that. Cool! Now for my last trick, I think I want to keep speeding up as I approach this keyframe. So to do that, I'm going to select this keyframe, hold down Option or Alt to get my Convert Direction tool, drag out a handle, and actually drag the handle downwards, so that I actually have the Value Graph ramp up into this keyframe, which also results in the speed ramping up on this keyframe.

This is a case where I might want to go ahead and pull out my handle a little bit and drag it to smooth out my transition through here. A little bit more of the transition through there, and let's preview that and see how that looks. Hits, slows or stop-reverses, zoom! Takes off. That's a little too slow of a take off for me, so let's go ahead and make this pretty short, like around there, and preview. Okay. I think I'm going to exaggerate the speed in more, the real zip-up here.

And you know, I'm even going to move this keyframe a little bit later in time, just to exaggerate that speed change as well. Smooth that out a little bit. Let's see how we like that. So you start to get an idea of how you can use the Graph Editor to both understand what's going on with your time remapping, but also to refine your motion, smooth out transitions, and do things like a little ramp-ups. You could even do overshoots by dragging the handle in the other direction, et cetera.

You can see when you come in here, overshoot that pose, and come back a little bit there at the end. Now, truth be told, Time Remap is something you're not going to use all that often. Much more often, you'll just be going ahead and using the Stretch parameter, just to slow down or speed up a clip for its entire duration. But when you're trying to create some extra drama or just slow down a shot during a very important part of the shot, Time Remap is a great tool that After Effects offers.

Show transcript

This video is part of

Image for After Effects Apprentice 10: Time Games
After Effects Apprentice 10: Time Games

14 video lessons · 8890 viewers

Chris Meyer and Trish Meyer
Author

 

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ.

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Join now "Already a member? Log in

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed After Effects Apprentice 10: Time Games.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferencesfrom the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Are you sure you want to delete this note?

No

Your file was successfully uploaded.

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.