On Thu, Dec 10, 2009 at 08:31:27AM +0100, "Ing. Daniel Rozsny?" wrote: > Hi, > > Ken Bass wrote: > > Hi all, newbie here - so please bear with me :-) > > > > In short, I am trying to capture video from vhs, via a tv capture card. But > > the A-V is out of sync - audio lags video. Actually, it becomes > > progresssively worse as the recording goes on. > > I've tried the same thing - recording from VHS. The problem is that > with a bad vhs tape (or a slow motor) you get rather a variable frame > rate video than an exact 25 (or 30) fps one. Well, you certainly can't use -mc 0 in that case (and possibly -noskip is a bad idea, too, but not necessarily). -ni and -idx are completely pointless here btw., and -vf harddup probably just wastes disk space. > > I have tried both ALSA and OSS. ALSA seems to work the best, but I keep > > getting XRUNS. Might mean the PC is still too slow. You could check if there are some options to increase some buffer sizes.
