White 'frames', any ideas?

ChazzyD

Hey, I have these strange white lines around every still I put in the videos I use. I don't really know how to explain it, so I've added a couple of screen shots, the white lines that surround the face and the lettering. How do I get rid of this? They are png images.

https://drive.google.com/open?id=0B9VCE7vXwjNMS2h1UEVhREtUX1U

https://drive.google.com/open?id=0B9VCE7vXwjNMWkxuankxbnNUd0U

borate

If this was a transparent PNG, with alpha channel - an image with a checkerboard behind it - the key (overlay) should be clean, as in this example.

An alternative would be an image that's in front of a green screen, to chroma key over a background using the GREEN SCREEN effect.

[deleted]

How did you obtain your png image?

Nat

ChazzyD

Hey,

@borateYeah, it was a png with alpha channel, and looks clean, even in the preview on videopad it is totally fine, looks crisp, no white, but then on export all these white edges appear 🙁 its VERY annoying!

@Nationalsolo I made it using photoshop

borate

Upload the png to DropBox, Google Drive, MS OneDrive or the like and link it publicly here. Someone will check it out.

[deleted]

The white edging you see (I am pretty sure) comes from your method of creating your image which I suspect you did using a mask.The mask line is the problem. If you have a suitable image (jpg/bmp etc you don't necessarily have to produce a transparent png. A jpg or bmp etc will do but will require a green screen as Borate suggests.

In your graphics program..

Load a suitable image. In this case a mask (Scuse the pun!)
Apply a mask to the part you require to keep
Your program may enable you to use mask smoothing
Invert the mask. The mask will now be the unwanted area.
Your program may enable you to enlarge the mask to reduce the object border a pixel or two (feather).
Fill the masked area with a pure colour...e.g. Green

It will now look a bit like this......
Remove the mask
Save the image as a jpg or bmp

It will look a bit like this......
Open VP and load this image
Load a clip or a blank frame....in this example I am using a blank black frame as it will better show the defect you are getting)
Place the blank clip/frame on Video Track 1 and the Overlay image (the face) on Video Track 2
Click the FX for the overlay (Track2) clip and select Green Screen.
As the clip image has been given a green background choose the same colour for the screen
Put the sequence line cursor so it passes through both tracks and preview the sequence.

At this point you will see that the edge of the mask is visible as a thin green line (This might be why yours is white??)

To reduce this unwanted effect increase the value of the Threshold setting to 99% and the border should pretty well disappear....

Note that this over a black frame on Video Track1. Over a video clip ....

Hope this helps

Nat