In order to support recording on different Wayland compositors (without having to develop tons of other middle layers by yourself), one would need to simply activate their built-in screencasting tool according the specified user settings. This took me a bit of time to figure out for GNOME, and I had to fill a bug-report to speak to one of the compositor developers to understand how to do that, as no documentation was available at all. Even so, some hidden bugs appeared (Quality wasn't too good, audio had to be recorded separately over ffmpeg, and then both audio and video had to be merged together in one file, V9 had a bug that consumes 100% of CPU on some hardware, so we had to use V8 by default... etc).
In order to go further, I had to do the same thing for KWin on Wayland, Sway and other compositors out there in the market and then integrate them into my program. I had to find some workarounds for any bugs that may occur.
Later on, some changes for ffmpeg API broke the Xorg recording (Green Recorder used ffmpeg to record on all desktop environments on Xorg), so I had to do more testing now for multiple versions of ffmpeg and on which distro do they work and don't work.
So I just gave up, as I simply didn't find any particular reason to continue doing that since the only amount of support I received on my then-opened Patreon was $20 per month at its max.
But it shouldn't be said that Wayland can not support screencasting or that it breaks screencasting. It is possible, and the previously mentioned issues are actually on the compositors' developers side, not the protocol.
In order to go further, I had to do the same thing for KWin on Wayland, Sway and other compositors out there in the market and then integrate them into my program. I had to find some workarounds for any bugs that may occur.
Later on, some changes for ffmpeg API broke the Xorg recording (Green Recorder used ffmpeg to record on all desktop environments on Xorg), so I had to do more testing now for multiple versions of ffmpeg and on which distro do they work and don't work.
So I just gave up, as I simply didn't find any particular reason to continue doing that since the only amount of support I received on my then-opened Patreon was $20 per month at its max.
But it shouldn't be said that Wayland can not support screencasting or that it breaks screencasting. It is possible, and the previously mentioned issues are actually on the compositors' developers side, not the protocol.