I reckon a ~17 year old thread necromancy is in good order, rather than creating a new thread, since I can't think of any to date obsolete or misleading answers being given here. Back in the day I used PgcDemux for DVD's, and it often gave me a 100~200ms delay report when I clicked the "Check A/V Delay" button. In recent years though, this click has always yielded me a "0 ms", which is not true for sure; many times the audio is obviously up to 300ms off. Then I have to sit and do the calculations by hand when doing film backups not using "one-click utilities" but step-by-step, mostly from command line. I'm not sure why PgcDemux has stopped given any delay reports, i.e. it always shows 0ms. Some of the DVDs in my collection has copy protection so I have to run through AnyDVD to gain access, but this "layer" shouldn't mess with PgcDemux, should it? Also, back in the day I had a DVD-Rom in my computer, now a BD-Rom sits there, but the player shouldn't make any difference, should it? Also, back in the day I recall using Windows XP or Windows 7, now using Windows 10, but this should make any difference, should it? Also, I see the "PTS solution" being mentioned in this thread. Now since FFmpeg has gotten so advanced, is there any way to extract this PTS data using for instance FFprobe?