Nuke - Video edge smears

[asuen]

Hi there,

Being new to Nuke I am having troubles with a small project that I'm doing on my own.

I camera tracked a scene of the highlands using PFTrack and modelled a sign in Maya. In Maya the sign is attached to a tracking locator in so there is no sliding. When I import the Maya image sequence into Nuke, the model of the sign is sliding and does not match the footage. Also there is a video smear at the edge. I've attached a picture of it.

Any help would be much appreciated!

Thanks in advance!

[chrisg]

Hi asuen,

It looks like your frame formats are not matching up. Your background plate is 720x480, but your render is being imported at 640x480. You can either use a Reformat node to change your render to the correct aspect ratio and size, or re-render from Maya with the correct size.

We discuss using the Reformat node in this NUKE video tutorial: Creating a stable image to build on (http://www.digitaltutors.com/11/training.php?vid=15415)

Edit: that stretching is when the edge of the bounding box is reached inside the frame. You can use a BlackOutside node to remove the smearing, but it will still be broken because the frame sizes don't match.

[asuen]

Thanks chris! It worked like a charm!