x264: is --open-gop & --key-int parameters crucial for bluray-compatibilty?

[aleaksunder]

Hello!

I'm trying to encode video for blu-ray authoring and now stuck with couple of questions related to this website:
http://www.x264bluray.com/home/1080i-p

As it stated on this site we have to specify "--keyint 24" and "--open-gop" parameters... but does this really necessarily?
I think I understand correctly how both parameters works...

AFAIK --open-gop is special technique simply not to put I-frames every --keyint interval if this is not really needed, therefore saves bitrate, but that special technique requires special feature from decoder, which is not fully supported by various decoders, and if "--open-gop" disabled than we have wider compatibility for our video stream... but the question is:
Does video encoded without --open-gop remains bluray-compatible?

And the second question is about "--keyint 24" or simply - 1 second of frames... as we now x264 default for "--keyint" is 10 seconds of video.
Since "--keyint" parameter does not require special features from decoder how "--open-gop" does and this parameter entirely relies on decoder computational power... the second questions is:
Does video encoded with "--keyint=240" ( or 10 seconds ) remains bluray-compatible?

[sneaker]

open gop is not required.

keyint 240 is not allowed but will probably work anyways.

2 second gops are allowed under specific circumstanes.
https://forum.doom9.org/showthread.php?t=154533