Last night, film from DVD unwatchable due to the sound spitting out in lumps.
Two things: The video was okay. And the same film, when streamed straight from NetFlix, was fine.
While the sound was bad, and as Jock says, the CPU was working very hard. 60-70%. (20% when working normally)
What makes it okay one moment, and not the next?
(I don't really expect an answer
)