Hello everyone,
first of all, thank you so much for creating AEO-Light. It is a very impressive piece of software helping me a lot with my personal project: I am currently working on a digital restoration of the first feature film my late father directed in 1981 ("Der Tod in der Waschstraße" www.imdb.com/title/tt0083213). Luckily I could locate the original camera negatives and was able to digitize everything frame by frame at my former workplace using an ARRISCAN XT 35 mm scanner (thank you ARRI!).
Converting the first reel of the sound negative went splendidly using AEO-Light. However, unfortunately for the remaining four reels of the film we accidentally must have used a different scanner gate which ever so slightly cropped the sound negative frames just a little bit. (I didn't notice this while scanning but unfortunately only now, months later). So for example the bottom border of a frame might look like this:
![image](https://user-images.githubusercontent.com/67609487/86182928-2cf0ed80-bb31-11ea-883c-a1cecc1a6bee.png)
Now, there are three issues:
(1) The black border creates an artificial signal (needs to be cropped)
(2) There is a smaller overlap between consecutive frames, so the stitching algorithm could run into problems.
(3) Due to the gate the illumination could be different close to the gate border (--> possibly needs to be fixed by calibration)
Regarding (1) I cropped the frames myself (or more precisely I zoomed in a bit with Davinci Resolve). Regarding (2), luckily there still seems to be a little bit of overlap, but my frame settings in AEO-Light are really at its extreme values:
![Screenshot 2020-06-30 22 01 25](https://user-images.githubusercontent.com/67609487/86184817-33816400-bb35-11ea-81f1-26ec44332171.png)
![Screenshot 2020-06-30 22 01 29](https://user-images.githubusercontent.com/67609487/86184860-472cca80-bb35-11ea-8862-c86476cdbcaa.png)
Regarding issue (3) the calibration feature of AEO-Light does not seem to fix the problem (Is it more aimed at density modulated sound?). Basically, running AEO-Light, unfortunately still creates a 24 Hz "clicking" for quiet parts of the film. As soon as there is more signal it seems to work better (see sample extraction on shared link below). Now, I am not sure how to proceed. I also don't know if the problem comes from issue (2) or issue (3) or a combination of both.
Does anyone have any idea what I could try to fix this? If you want to look the data, that's possible. I have uploaded 500 frames of the second act (also the "zoomed" frames from Resolve):
http://maltefilm.de/filerun/wl/?id=KRWVoXnIqrj6rhesKKw8WcaFLkspvPBR
By the way, the files on the server have been corrected for dust artifacts and transcoded to monochrome dpx. So it's not the original scan. Let me know, if you think it might help to have a look at the original scan. I am grateful for any piece of advice!
Thank you so much in advance,
Malte