Dude! I had this idea like 20 years ago. But I did nothing with it. Nothing. The idea:
Extract sound from a video by tracking subtle vibrations in the video frames over time.
I want to emphasize how I did nothing. I didn't research it. I didn't write a single line of code. I didn't even learn how to fourier transform (if that's even applicable). I often hear people say they have an idea. But they don't do anything. They didn't steal my idea. Likely, I wasn't even the first person to even think of it.
We didn't believe you at first, but we asked like three people who were at that party. They not only corroborated your story, but even said you totally mentioned wanting to start a company someday. Sorry! If this isn't enough money, let us know.