2) One day MC will include a Blu Ray Navigation Filter (...)
if only
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Interestingly the full BD menu "trick" (based on libbluray) is implemented in KODI but has now also been implemented on the Dune solo 4K. It displays full BD menues perfectly with 95% accuracy for me. The Popcorn hour A-500 doesn't have it. It seems to me that from a legal/licence stand point as long as the player doesn't have a physical disc drive some manufacturers are implementing the libbluray-trick and are in a safe grey zone area.
But back to the point
There are only two ways to get to full BD menu support (from a LAN source) with an oppo :
a.) bdmv (AVCHD trick) - pull - oppo acts as a SMB/CIFS/NFS client
b.) iso (oppo firmware jailbreak) - pull - oppo acts as a SMB/CIFS/NFS client
...diggin deeper...as long as you have BD on your server you're fine with option a.) but if you also have DVD folders you're screwed. If DVD are present as well b.) is the only way = iso
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Push (where oppo acts as renderer) will not work as even if you override DLNA headers : you simply can not push a
folder ....only a file and even if you COULD push a folder the oppo would receive it in DLNA renderer mode, it's firmware would not make him switch automatically into SMB client mode and start playback with full BD navigation.
NB: There is a way (!) to control (additionnaly to their HD media app) the oppo over IP to play files directly. That's achieved by direct UDP packet sending (handshaking) and then by sending a http command over a simple web browser. But that has nothing to do in JRiver's forum.
BUT !!!! In theory one could use JRiver MCWS (haven't investigated yet) and build a jriver driver/add-on which would when you select a library file in jriver send an http command to the oppo which would make him play in SMB mode...you would then have full menu navigation like with the physical disk AND jremote's world class GUI
.