Just use eac3to’s “speedup” feature, which compresses the audio the right amount, but this also increases the pitch of the audio, so the pitch will be wrong, but no more wrong than the original PAL GOUT. Compressing the audio without changing the pitch would likely require more serious audio editing software. Don’t worry about the extra frames, you’re not going to notice and it’s quite a lot more work to fix those.
Allright, i’m gonna try that.