I believe I might have found part of the problem. Up till now I had treated the director's cut as being immune from the problems of the theatrical in respect of aspect ratio; however, overscan was hiding the fact that the director's cut does not quite meet the right hand edge of the screen. It's very small imperfection, but it can be seen on the 20th Century Fox logo at the start, where there is a magenta line on the right.
MeGUI wants to crop two pixels from the right if I run the project through it, and that looks about right. I can now see that AutoGK has cropped this, as I can see that the AVI does meet the side of the screen.
So I shall have to recrop the director's cut by a tiny bit too, after, all, which means re-encoding in CCE. While I do this, I might as well take the opportunity to shrink this to DVD5 size, so a DVD can be released, as I don't want to re-encode this twice and lose quality. Is there a way of working out the bitrate, so that it fits on a DVD5? I assume a compression from DVD9 to DVD5 simply involves a lowering of the bitrate?
My video mpg is 5.25 GB. The AC3-5.1 is 376 MB. I suppose I need to shrink the video to just under 4GB. What sort of bitrate does a DVD5 tend to use? The edit is 117 min, so roughly two hours.
How about setting a VBR in CCE with
maximum 5000
average 4800
minimum 3000?