Render this filter across
timeline, now all frames have been tinted accordingly.
Now we're ready to select
inside portion of the image, and crop to it. This will be an easy way
to get read of the white borders along the edges.
Use the 'Rectangle to Alpha' selection tool.
Click and drag from one corner of the image towards the diagonally
opposite corner. For example, click near the upper left corner, well
inside of the light border. Then drag it to the lower right corner and
release the mouse button. The rectangular selection will be shown as
marching ants (dashed animated lines).
Crop to your Selection
Now that your selection is defined, crop to it. Use the menu:
> Crop to selection
This will not only crop the current image, but all frames in the
animation the same way.
This will therefore eliminate the bright borders along the edges. Of
course, you can skip this step of cropping if in fact you don't mind