Qbix-Beginners

If you can generate an MP4 autoplaying silent video in Javascript, then you'll be able to display a super-white QR code using Wide Gamut HDR standards:

https://github.com/dtinth/superwhite

It could be done in ffmpeg.wasm but it's very large (over 25MB)

There is also a library that does FFMPEG as a service worker:

https://gist.github.com/ilblog/5fa2914e0ad666bbb85745dbf4b3f106

In PHP, we can do it using ffmpeg on the server: https://stackoverflow.com/questions/5892308/create-video-file-using-php

It seems wasteful to transfer the entire ffmpeg to the client just to generate this QR code. But on the server, we can certainly make use of an ffmpeg if it is installed!

ffmpeg -r 10 -b 1800 -i %03d.png test1800.mp4

But the hard part is figuring out how to set the white pixels to super-white in HDR color space. Here are some possible leads:

https://www.reddit.com/r/ffmpeg/comments/g3uucr/how_do_i_encode_4k_hdr_video_as_h265_with_ffmpeg/

https://www.reddit.com/r/ffmpeg/comments/v3k4mn/how_to_add_a_png_to_hdr_video_without_messed_up/