[FFmpeg-user] Digitizing Normal8 or Super8 films

[Terje J. Hanssen]

Den 02.12.2024 12:41, skrev Michael Koch:
> 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?

@Michael,
This is more a comment than a reply to what you specifically ask for.
About thirty years ago I recorded a few old 8 mm and Super 8mm films 
from a film canvas onto my analog Hi8 camcorder/tape.
Then later on, I digitized this video via an A/D converter&recorder to 
DV video format, and via ffmpeg/DeVeDe to a DVD burner.

A similar method using a consumer quality DVD recorder (in lack of a 
dedicated film scanner for expected higher quality) is shown here
https://www.youtube.com/watch?v=VD_NOa3rDbg

Today I probably would have tried a better HD camcorder and output 
directly via HDMI to a HDMI-USB3 video capture dongle as input tp 
ffmpeg. Someone mentioned stream-copy first before encoding, without 
telling how to do it in this pipe-line.

Terje J. H