SOLVED: VS2019 Ultimate question: Keyframe interpolation

[Raedot]

Hey all!

I just got the Corel VideoStudio 2019 Ultimate and am digging into all that it has to offer for video editing.
There's one thing I'd like your help on, however, and that is information on keyframe interpolation.

Let's say I have a clip that I want to add some panning & zooming to. I add my keyframes, input the zoom
and pan values I want the clip to be in once we get to the newly added keyframe and in preview I see that
the pan & zoom does indeed smoothly transition from one keyframe to the next. This is very expected.

However, should I wish to make the transitions instantaneous, let's say on frames 1 through 59 I'm on zoom
level of 100% and no panning and on frame 60 I want it to be 200% zoom and panned to the corner of the clip
and returning back to 100% zoom with no panning on frame 65, once again with instant transition between the
keyframes.

Is there currently a way for me to do that in an easy-to-use manner? Something like editing the interpolation
curve for the keyframes so I can decide how fast the transition between them is.

What I've played around with the pan & zoom it seems that in order to do so, I would need to add a "buffer
keyframe" one frame before my intended instant transition with the same values as the previous keyframe
to prevent it from linearly transitioning between the initial state and my end state. I'm just wondering if
there exists a better way to achieve such a thing because using the "buffer keyframe" technique, while useful,
causes the keyframe timeline to become a mess really quickly if you want to add a lot of instant pan & zoom
effects. Also with long clips you might not even notice the double keyframe because they overlap in the timeline.

Thanks in advance for any advice you can offer me with this question!

[lata]

Hi
Not really sure what you are trying to do, are you sure you are referring to Frames and not seconds
NTSC 60 frames is 2 seconds
100% zoom will fill the screen

You may not need Pan & Zoom

You may be best to use one of the overlay tracks.
Add your clip to the overlay track position and resize
Set its duration, from your post that would be 59 frames ( 2 seconds)
Add the same clip adjacent to the first
Position / resize and set the duration

Hint
Right click the clip on the preview screen for size and anchor options
I have added a test vsp for you to look at

overlay clips.zip

Opens using 2019

(1.52 KiB) Downloaded 64 times

[Raedot]

Hey and thanks for the reply!

I took a peek at the test file you attached and while it's close, it's not quite what I'm looking for.

To elaborate a bit on what I want to achieve, I've also made an example VSP using the "buffer frame"
method I described in the original post. There are two clips in the VSP, one with the aforementioned
"buffer frames" to make the transitions instant and another without the "buffer frames" just before
the actual keyframe that matters. You can see the keyframes I've set up in the "Customize motion"
section.

To further clarify my initial question using the attached VSP as an example: is it possible for me to
make clip 2 behave like clip 1 without adding the "buffer frames"? Or am I approaching this the
completely wrong way?

[lata]

You did not say you were using Customise Motion, i thought you were using Pan & Zoom

You would have to use several clips, one for each section
VSP attached

instant_zoom_demo2.zip

(2.36 KiB) Downloaded 76 times

[Raedot]

Hey and thanks again for your response!

Sorry for the confusion. I started out with the pan & zoom when I made the thread
but after I saw your initial response of me not necessarily needing pan & zoom, I
wanted to try if custom movement would be the solution instead.

I think what caused my confusion and prompted the question in the first place was
me applying what I had learned in another, open source video editor which allows for adding
keyframes in three modes: "linear", "discrete" and "smooth". "Linear" mode would
linearly interpolate from one keyframe to the next, "discrete" would instantaneously
jump to the end result similar to the instant_zoom_demo.vsp in this thread and "smooth",
IIRC, allowed for me to have a non-linear transition from a keyframe to the next.

But I digress. I think based on what you've shown me in this thread I have a pretty
clear picture on how to do these instant transitions now. Thanks a lot for the patience
in dealing with a VS2019 newbie like me . As far as I'm concerned, this question is now
resolved and I'll mark it as such.