When I had to correct the aspect ratio of my ESB boot I used the 2004 DVD as a guide.
I superimposed a framegrab of my capture over the identical frame from the DVD in Photoshop. Then I resized the capture to fit exactly over the DVD, and noted the percentages shrunk.
I used those numbers for the resize (allowing for anamorphic squeeze as well). As you can see, my boot had more vertical information top and bottom.
