Software: Sony Vegas MS10 HD Platinum
I am working on a project to restore a horrifically color-faded military studies film from 1958, using a government agency-supplied VHS tape that they issue, with plans to do more in time.
At this point I am only doing early color recovery tests in low resolution.
The problem is the conversion of their stocks of sanitized (secrecy-edited) films from Betacam SP to NTSC VHS. The artifact of wide, yellowish bars scanning upward across the frames is very annoying, and a devil to reduce without creating new problems.
The left side is original Kodachrome I dye degradation appearance:
Low res pod color test comparison - YouTube
You can see more at the end of this clip, and the darkening to the right side: HARDTACK TWO preliminary restoration split demo - YouTube
The lines are more pronounced in blue-dominated scenes, and the dominant spectral bands of the lines are red and magenta.
A subquestion is how to produce a luminance mask to try to equalize illumination of the right side of the frames with the left, caused by gravitational dye settling in the film reels.
Here are some random screens of before and after, strictly using MS 10 HD, with the original inset as a subpicture:
Sincerest thanks for any assistance.