[FFmpeg-user] Digitizing Normal8 or Super8 films

[edit 'B]

> On 2 Dec 2024, at 12:41, Michael Koch <astroelectronic at t-online.de> wrote:
> 
> Is it possible to use FFmpeg for digitizing a Normal8 or Super8 film?
> The framerate is 16 for Normal8 or 18 for Super8, but the motor speed of the projector may have 10% tolerance.
> I could project the film on a screen and make a FHD video at 180 fps (with Panasonic GH5S camera).
> There would be a small distortion because the projector and the camera aren't exactly on the same axis, but that could be corrected with the remap filter.
> I haven't yet tested it. What I expect to see in the video is approximately 5 bright frames followed by 5 dark frames.
> Is it possible to automatically select one frame from the middle of each bright segment?
> Or any other ideas?
> 

What are you after?
This is called Telecine, and it’s a process as old as television itself.
So there might be a small chance you can find a bit more info here and there.

What you are proposing is a way that absolutely no one uses. There is either a lock between projector and cam so there is a 1:1 relation, or a cam is used with dynamic shutter speed.
(Besides frame to frame scanning that is dog slow but high quality.)

Unless you have tons to do / or are trying to build a new system, or are a total nerd who finds joy in torturing himself to save a few bucks at the cost of A LOT of work, find a company that does this for you.
I don’t see a reason to re-invent the wheel in this case.

Bouke