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How can I pin a moving object to the centre of a clip

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Billy Young
How can I pin a moving object to the centre of a clip
on Oct 3, 2015 at 10:32:26 am

Hi Guys,

A newbie here,

How can I do this:
I have a movie filmed through the windscreen of a car following a Motorcycle in the centre of the screen.
The camera is locked off.
The motorcycle moves primarily left and right, especially going around bends.

How can i use Keyframes, or another method, to pin the motorcycle to the centre of the frame, and stay in this position throughout the movie.

I know this will adjust the edges of the frame, showing a Black Background as the footage moves left and right, and up and down,
and I will crop or zoom in on the the footage as needed.

Thanks in advance guys


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Jeff Kirkland
Re: How can I pin a moving object to the centre of a clip
on Oct 3, 2015 at 10:00:01 pm

The TrackX plugin from CoreMelt can do that automatically for you.

Jeff Kirkland | Video Producer | Southern Creative Media | Melbourne Australia
http://www.southerncreative.com.au | G+: http://gplus.to/jeffkirkland | Twitter: @jeffkirkland


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Billy Young
Re: How can I pin a moving object to the centre of a clip
on Oct 3, 2015 at 10:22:08 pm

Thanks for the reply "Jeff",

but isn't TrackX used for pinning either a title or an object to for example a running dog, and it will keep your title or object attached to the dog ?

What I'm looking for is a way to have for example the Motorcycle Helmet stay unmoving in the same place in the frame for the duration of the clip,

I know that this will move the clip all over the place within my viewer, so will mean I will have to Zoom in, Crop, Transform or Distort the Clip,

Another way to describe the effect i'm looking for is,
Imagine the camera being attached to the back of the Helmet with a rig or brace,
so the helmet stays in exactly the same place within the Clips Frame.

I want this effect, but filmed from 15-20 yards behind the Helmet, from a following Vehicle, with the Camera on a Fixed position on the Dashboard,
If that makes sense !!!

or imagine filming handheld the erratic flight of a Butterfly, which will be all over the place within your Cameras Framing,
Then I'd need to somehow Pin the Butterfly to the exact Centre of the frame.

I could do it with Keyframes manually adjusting the Helmet / Butterfly frame by frame, to the Centre,
But to do this on a Clip that will be several minutes long, would be very time consuming and laborious.


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Jeff Kirkland
Re: How can I pin a moving object to the centre of a clip
on Oct 3, 2015 at 11:04:09 pm

Yep - that's exactly what it can do. In a recent update, they added the ability to track an object and keep it in the centre of the frame (or whatever offset you choose, I guess). It's intended for keeping wandering presenters locked to the centre of a small picture-in-picture frame but useful for a whole host of things :-)

You can see the demo here:

Jeff Kirkland | Video Producer | Southern Creative Media | Melbourne Australia
http://www.southerncreative.com.au | G+: http://gplus.to/jeffkirkland | Twitter: @jeffkirkland


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Billy Young
Re: How can I pin a moving object to the centre of a clip
on Oct 4, 2015 at 8:49:27 am

Hi Jeff,

You've hit the nail on the head,
that's exactly the effect i'm looking for,

Thanks for the Vimeo Movie.

Now to see what problems this "Lockdown & Track" effect will present me with.

I'll be giving it a go, once I update to the New El Capitan OS10.11,
in a couple of weeks, when some of El Capitans Gremlins are dealt with,
and Software has been adapted for El Capitan.


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Bret Williams
Re: How can I pin a moving object to the centre of a clip
on Oct 4, 2015 at 4:51:52 pm

The built in stabilizer has a mode called tripod. But trackx, drivex, slicex combo is a great thing to have in your arsenal.


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Billy Young
Re: How can I pin a moving object to the centre of a clip
on Oct 4, 2015 at 6:27:10 pm

Thanks Bret,

I've only managed to search and find one YouTube Video,
and it only shows FCPX Tripod as an additional Stabilisation.

I had no luck searching Vimeo.


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Jeff Kirkland
Re: How can I pin a moving object to the centre of a clip
on Oct 4, 2015 at 8:23:16 pm

Tripod mode pretty much does what it says on the tin... It'll try to give you a locked off shot, but if you've kept the motorcyclist close enough to the centre of the frame as you shot, it might be enough to stabilise the shot and get the result you need without using TrackX.

Jeff Kirkland | Video Producer | Southern Creative Media | Melbourne Australia
http://www.southerncreative.com.au | G+: http://gplus.to/jeffkirkland | Twitter: @jeffkirkland


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Bret Williams
Re: How can I pin a moving object to the centre of a clip
on Oct 5, 2015 at 2:03:07 am

Once it's locked off, then adjust the position to taste.


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