Watermark AI-generated audio files

[julien-nc]

@nextcloud/integration

We could watermark all the audio files generated by the task processing providers. If we do it at the task processing level, it saves us the effort of implementing it in all providers.

• Audible watermark: We could insert a little bit of audio at the end or the beginning of the file. Something short saying "this audio file was generated by AI".
• Inaudible watermark
  • We can store information as ID3 tags inside the file. We could store a comment
  • Just like for images, there might be a way to embed something inaudible in the audio itself. I have no idea what the technics are and if there are Php libraries for that

This could be done right before storing the images in appdata, when the task results are set by the provider.

[EntityinArray]

IMO, "invisible" watermarking is a bad idea, it can easily be erased and will just malform data in unexpected ways
How would people even verify these watermarks if they are invisible?

Adding a friendly comment into EXIF or ID3 is fine
And even then, i think its out of scope for NC, processing tools should leave these comments themselves.