Remove Keystoning Effect

bcf1ca

Newbie Joined: Mar 16, 2015 18:52 Messages: 10 Offline

Solved by

Oct 03, 2019 18:35

I shot a video of a wedding where I could not use a tripod (bridezilla's wishes). I put the camera on my knee and managed to do a pretty good job but all of the shots exhibit a keystoning effect (a square image looks narrower at the top than the bottom or a trapezoid in geometric terms. I looked through all the video effects and Lens Correction in PD18 and there appears to be no effect to correct this. Does anyone know of a way to reduce/remove the effect?

Thanks in advance.

tomasc

Senior Contributor Joined: Aug 25, 2011 12:33 Messages: 6464 Offline

Oct 03, 2019 19:23

You can correct this trapezoid. Try this: Highlight the clip. Open PiP Designer. Change the Tool size from Fit to 50%. Enable TV safe zone. At each corner is a blue reshaping node. Click and drag them to reshape the clip to be wider. Move the top left node to the left and the top right one to the right. You may need to move the bottom nodes outward too to compensate.

ynotfish

Senior Contributor Location: N.S.W. Australia Joined: May 08, 2009 02:06 Messages: 9977 Online

Oct 04, 2019 18:40

Hi bcf1ca -

To illustrate tomasc's instructions, here's a short screen capture.

Those freeform handles are a bit fiddly to get under control!

This idea (below) depends very much on the degree of keystoning. I imagine it would be fairly slight if the camera was on your knee. Bridezilla obviously wasn't doing the editing.

Anyway, if you open this packed project, then import your wedding clips, try copying the keyframe attributes from "Keystone.mp4" then paste keyframe attributes to one of your affected clips. It may be too extreme. It may be not enough. Just a thought.

Cheers - Tony
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bcf1ca

Newbie Joined: Mar 16, 2015 18:52 Messages: 10 Offline

Oct 05, 2019 09:22

Thanks to you both. This worked well.

Tomasc, I appreciate the fast response.
Tony, I appreciate the packed project and the time it took for you to prepare it.

I am amazed at the capabilities of this program.

Cheers!

Barry

This message was edited 1 time. Last update was at Oct 05. 2019 09:23