@Gingeh I once did something... more horrible: I used a non-traditional video editor: ffmpeg
I think we had the task to record some video with sound of something
but because I didn't wanted to record video, I made a webpage and took a screenshot of it, with a text "camera doesn't work" (or similar) (that was ages ago, so by now I would probably figure out a way to put that text in software there, and not screenshot)
then I also used a aux-aux-cable to connect the sound output with the sound input and ran audio over that (by now, I would 100% use ffmpeg for that instead)
and then I used ffmpeg to strech that one frame to the length of the audio... and you got your answer to the task...