Unfortunately, CQMatic can't do a damn thing about that.
That's up to the encoder (a.k.a. Tmpgenc) to take care of those issues.
CQMatic simply tries to get the best settings for Tmpgenc, but in terms of the whole movie.
Let's see if Hank can add that to HC.
Or else, I believe you can find that feature in CCE but it's expensive...
If I were you, I'd cut the credits at the end of the movie.
But I know: there are some movies that seem to have finished and they're showing the credits and suddenly bang! movie bloopers
.
For those cases there's no way out.
Bottom line: there is no tool that can do that when the encoder is named tmpgenc.
Cheers