First of all: A happy new year to everyone!

Yesterday i found a german AC3 file for harmy ESB release, so i decided to rewatch it again (this time with the sync version i grwon up with).

I used MKVtoolnix to mux the ac3 file into a mkv. After it was muxed i realised the MKV runs now with a framerate of 24fps (running time 2:05:02) while the original AVCHD runs with 23fps (running time 2:05:57), resulting in a time difference of 55 secs. I also realised i couldn`t skip through the film in VLC with my MKV version.

Has anyone experienced the same problem with using MKVtoolnix in the past?

Nevertheless, i watched it yesterday and strangely i didn`t realise any "speed up".