noggin the RPi4 SoC is basically an RPi3B+ with faster clock speed and an extra IP block for 4K HEVC, so 3D works on RPi4 under the older LE9.2 codebase as nothing really changed, but support needs to be reworked for the newer GBM/V4L2 pipeline.
Sorry to resurrect this old thread, but.....are you saying that if I download this:
https://releases.libreelec.tv/LibreELEC-RPi4.arm-9.2.8.img.gz
And load it on a Pi4 it will play 3D-MVC? I realize it would be an older build, but I ONLY use this for playing 3D.
I just downloaded the RPi3 version to put in a temp 3D player when I saw that comment.