Hi all,
I have an old U-matic tape that I have digitised into Avid. It has a lot of old skool dropout on it (horizontal white lines) which I would like to clean up. Unfortunately the tape is 20mins long and there is a lot of dropout so I am looking for an automatic way to do it. I found that if I digitised the tape again the dropout appeared in different places.
So I now have 2 copies of the same tape (A and B) with dropout in different places. I started by layering the 2 videos on 2 tracks and applying a Boris Composite Difference Mode effect which quite successfully isolates all the differences between the two captures (i.e. the dropout). What I need to do though is reverse this effect so that all the dropout is replaced with the clean shot from the alternate capture. In other words I want to isolate the similarities and remove the differences. Unfortunately there is no simple reverse Matte switch in Boris.
The attached file shows a side by side comparison of the effect with the isolated dropout really visible on the Right. This is the Sum of the dropout in both A and B.
So now I am looking at AfterFX and whether I can achieve what I want here. Maybe using track mattes.
Basically I need the Diff Matte from A to take the fill from B and the Diff Matte from B to take the fill from A but then the two results need to be combined to obliterate the dropout.
Can anyone get their head around this? Or come up with an alternative way of doing this? Thanks Nick