According to the Bing Browser AI.   This was its response to my question'

Using the FFmpeg dll write the command line switches to both detect scene changes in a video file, and export the clip of each detected scene to a seperate image file.

To export a clip of each detected scene to a separate image file using FFmpeg, you can use the select filter. The select filter selects frames based on their timestamps and outputs them as individual clips '.

Here is an example command line switch to detect scene changes in a video file using FFmpeg and export the clip of each detected scene to a separate image file:
```
ffmpeg -i input.mp4 -filter:v "select='gt(scene,0.4)',showinfo" -f null -
```
This command extracts all frames that differ from the previous frame by more than (gt) 0.4 (on a scale from 0 to 1) '.

To export the clip of each detected scene to a separate image file, you can use the following command:
```
ffmpeg -i input.mp4 -filter:v "select='gt(scene,0.4)',showinfo" -vsync vfr -q:v 2 -f image2 output_%03d.jpg
```
This command extracts all frames that differ from the previous frame by more than (gt) 0.4 (on a scale from 0 to 1) ' and exports each detected scene as a separate image file with the filename format `output_001.jpg`, `output_002.jpg`, etc. ⁵.

I hope this helps! Let me know if you have any other questions.

Source: Conversation with Bing, 6/7/2023(1) ffmpeg scene detection - cut a video into clips based on scene changes .... https://forum.videohelp.com/threads/405174-ffmpeg-scene-detection-cut-a-video-into-clips-based-on-scene-changes Accessed 6/7/2023.
(2) video - Using FFMPEG: How to do a Scene Change Detection? with timecode .... https://stackoverflow.com/questions/35675529/using-ffmpeg-how-to-do-a-scene-change-detection-with-timecode Accessed 6/7/2023.
(3) Scene change/shot detection/image extraction using ffmpeg from video .... https://stackoverflow.com/questions/24875752/scene-change-shot-detection-image-extraction-using-ffmpeg-from-video Accessed 6/7/2023.
(4) Using FFMPEG's Scene Detection To Generate A Visual ... - GDELT Project. https://blog.gdeltproject.org/using-ffmpegs-scene-detection-to-generate-a-visual-shot-summary-of-television-news/ Accessed 6/7/2023.
(5) GitHub - Jpja/FFmpeg-Detect-Copy-Motion: Detects motion in video files .... https://github.com/Jpja/FFmpeg-Detect-Copy-Motion Accessed 6/7/2023.

It's funny that you made this suggestion 7 months ago and I'm just seeing it now. I just finished building a database that uses OpenAI and FFMPEG to do exactly this. FFMPEG detects the scene changes, and then I use OpenAI along with the transcript SRT to find "organic" points in the video. Wherever I say "click here" or "look at this" or anything like that, the AI inserts a tag for a screenshot there. It's working pretty well so far. I should have the first "finished" AI-produced handbook out in a few days.