[FFmpeg-user] Invisible watermarking filter

[Mark Burton]

Is there or has there ever been any support for an invisible watermarking filter in ffmpeg? Or perhaps there is an external project that supports this?

This (now closed) job posting that someone listed a while ago, outlines what I would be looking for:
https://www.freelancer.co.uk/projects/c-programming-linux/ffmpeg-invisible-watermarking/ <https://www.freelancer.co.uk/projects/c-programming-linux/ffmpeg-invisible-watermarking/>