[vlc-devel] Re: Perceptible Latency [was Re: Re: CVS Commit (fenrir)]
stippi at yellowbites.com
Wed Apr 30 08:28:29 CEST 2003
> cvs at videolan.org wrote:
> >Update of /cvs/videolan/vlc/include
> >Modified Files:
> > vlc_config.h
> >Log Message:
> > * vlc_config.h: increased AOUT_PTS_TOLERANCE to 40ms, it avoids a
> > lot of
> >resampling with some files while keeping good synchronisation.
> > Anybody has an idea of the maximum desynchronisation between audio
> > and
> >video that still be imperceptible ?
> The acceptable latency between audio is video is considered
> imperceptible below 200ms but it really depends on the application.
> For basic interactivity everything below 250 ms is acceptable.
> Everything below 150 ms is excellent.
250 ms means 6 frames in a cinema movie. I really don't think this
would go unnoticed! 40 ms would probably be ok, as it is only about one
frame. I'm certain I would notice a desynchronization of 2-3 frames.
Maybe 250 ms is ok for interactivity, but not for a movie player. Do
you know how much work is put into making the sound of a movie? Playing
it back 6 frames to late definitely spoils it all. :-)
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