Here is jdobb's reply for this error: Sometimes you can try extracting the streams one at a time and they'll work when you get that error. That error used to be fairly common in TSMUXER, then I built a routine into BD-RB that catches it and does the video separate from the audio and it went away. It looks now like occasionally pops up even with audio/subs-only.
Normally it means that it was a bad rip (google it and you'll see references that indicate it goes away with a re-rip).
And if you are trying to process secondary audio in this backup, try adding this line to your BDRebuilder INI file: PROCESS_SECONDARY=0