TsRemuxed a Bluray-"back-up"

But it still is almost 26GB large - even though i have choosen only one “audiostream” and the “videostream”…

Any tips on how to “shrink” it some more , so that it will fit on a 25GB-disc ???

I think it were discussed here.

Tsremux has the Trim function, you can trim the end credits and check if it will fit a BD disc.

If it still doesn’t, the only way is to use HDBDSplit to split into a 25GB BD disc and the rest into a DVD disc.