My movies are ripped to ISOs. They play fine with VLC, windows media player, cyberlink, basically every player I've ever used. I use daemontools lite to mount the ISOs. I also had the same problem playing a physical disk on the computer.
MC is version 17, downloaded and paid for it a couple weeks ago. I'm running a quad core AMD, SSD, 8GB ram, so I'm not limited by computing horsepower. My sound card is a claro plus. I updated the drivers to latest version and still had trouble. I don't think I've got anything too extraordinary in terms of equipment or configuration.
In any case, swapping to direct sound fixed it. I just have to keep swapping back and forth depending on whether I'm listening to music or watching video. Annoying but workable.
Unless there's a way to configure JR to automatically change outputs depending on the media selected.....?
And thanks for the post. I appreciate that you took time to reply.