HDMI-in input activation on openpli image

Anyway, thanks everyone for your input, and I'd like to update you: I installed the latest Dream Elite for DM900 (although it's quite old). I installed the Gutemine 2.6 plugin, which makes the HDMI-in channel switch appear in the menu. It's very visible, but it doesn't allow any recording. Actually, even though I started this post asking for help with seeing the HDMI-in channel where I connect another box, it's obvious that I'm also interested in the recording function. That said, after searching around, I found that it's possible to record via the stream server, which is shown in the same image. However, even playing with the bitrate quality, the recording is far from 1080p or even 720p quality (which for me would be more than sufficient. I wanted to use Openpli because I'm now used to the previous decoders, but I understand that it would constitute an unnecessary limitation on the DM900 which is based on Dream OS. Having solved the HDMI-in problem this way, I see that changing channels with DE is really slow and even the bouquet menu takes a few seconds before I can scroll through the list. But this is a different problem and in that case I will open another topic. I will also try Vix but if you can't record then it's useless... Anyway, Greetings to anyone who wants to give other advice and to those who responded