On Fri, 2013-10-18 at 16:23 -0700, Len Ovens wrote: > On Sat, 19 Oct 2013, Ralf Mardorf wrote: > > > On Fri, 2013-10-18 at 15:38 -0700, Len Ovens wrote: > >> So if you are looking from a distribution POV, you have no control of > >> what the audience will play your video on. > > > > Assumed you would have the perfect player, the picture is absolutely > > identical to the original, the sound is completely equal to it's source, > > on every consumers gear, then light still is faster than sound. Do you > > sync for the smart phone or for the drive-in theater? > > Yes of course. The brain is used to dealing with audio lag at varying > distances. I was playing around with VLC which has a sync control. It > seems I could set it to be off a bit but my brain seems to correct it with > in some seconds... Or maybe every time I change the sync the audio and > video restart from a known point of sync and then drift... > > As you said before, the brain notices leading sound much sooner than > lagging sound. That would be the way it is in nature. The drive-in > theaters I have seen have in-car sound (often using the car's radio), so > the delay is minimal. I wonder if indoor theater operators set the audio > ahead just a bit so it hits the second or third row in sync. It would > probably mess with the surround sound too much. I will say I have not > noticed sync problems in the theater even though we always sit at the back > as my son doesn't see well above horizontal. For flash and thunder the brain can't compensate it. Sometimes it happens that I watch TV for 30 minutes without noticing bad sync, if I randomly notice the delay, I often can't continue watching. It's similar to concave vs convex for a drawing. Sometimes it seems to be convex, sometimes concave and sometimes it's switching. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
