this post was submitted on 07 Feb 2024
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My main experience casting to Apple TVs from Linux is with Home Assistant, which has a few different addons related to Apple TV. Unfortunately most are related to receiving casts or casting music, and it doesn’t look like any support screen mirroring. The main library - https://pyatv.dev - has only limited support for AirPlay, and its documentation indicates it lacks screen mirroring support. If you just want to stream a video, though, then it would be worth looking into.
open-airplay with the auth solution by @funtax (on Github) is the approach I would try, but unfortunately I can’t comment as to whether or not that actually still works.
I can't find any "funtax" user in the linked openairplay repo, but it appears that I have completely missed pyatv's ability to stream video. As long as it can stream video I think I can make it do screen mirroring too. Thank you very much, I will be looking into pyatv now!
I don’t think they contributed to openairplay, but they mentioned in an open issue in the openairplay repo that they had created a separate repo to handle the auth piece. Strangely I can’t find the issue now, but this is the repo I was talking about for that: https://github.com/openairplay/AirPlayAuth
That all said, it pyatv will work for you it looks like a much better bet, anyway. Good luck!