Evidently I couldn't explain myself well, and the language difference did the rest.
I have a home theater room, located in a detached area of the house, in which I see films with an htpc, on which JRiver is installed, connected to the receiver and the projector via hdmi cable and everything works fine.
Inside the house I don't have an htpc but I would like to see the movies on the TV at home, using JRiver that I loaded on the laptop. The latter is clearly not a 4K nor even 2K so I would like to connect it to the TV via DLNA.
I managed to do it, but the TV uses its own internal player, which does not allow me to use all the functions of JRiver (choice of audio, subtitles, etc. etc.). This is why I was wondering if it was possible to do it.
I found that it can be done with Plex, but I prefer to stick with JRiver.
I hope I was able to explain myself, and that the Google translator did a good job