Re: [LAU] OT - Audio and Video Synch

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To: James Stone <jamesmstone@...>
Cc: A list for linux audio users <Linux-audio-user@...>
Date: Friday, October 18, 2013 - 10:25 pm

On Fri, Oct 18, 2013 at 5:36 PM, James Stone wrote:

> I am wanting to get some audio and video recorded - sample accurately

Any camera will give you this if you use the audio input on the
camera. Or do you mean you need to record to some other device and
sync later? If the latter, you're in for a world of pain. The clocks
will drift unless you're using a shared clock, and that's a whole
different class of professional equipment....

> Can

All of them. The trouble people usually have is software that handles
the sync incorrectly (or doesn't really try to handle it at all. If
it's based on ffmpeg.... yeah 'all bets are off').

> Do you have recommendations about how to record a

Just about any camera made.

> Secondly, I am wanting to intentionally shift the audio timing so it

Any NLE will do this. I use Cinelerra, but I'd urge you not to :-)

> Lastly, do any of you know any research about the limits of human

You'll not hit the limits of human perception in video-- even 10 bit
isn't quite there, and you ca always get closer to see more
resolution.

Audio perception maxes out at around 48k/16 bit, but record to 24 bit
if possible (for production headroom).

However, anything but very high end professional equipment won't
approach these limits in reality no matter how many megapickles they
offer, and the formats being used for recording are low-rate/lossy.

That said, you could do worse than a D7000 or a 5D... depends on what
you're doing. DSLRs make great video cameras, but the ergonomics are
still better suited to still photography. Something old/cheap like an
HV40 is easier to use, but the output quality is not current
generation.

Monty
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Messages in current thread:
[LAU] OT - Audio and Video Synch, James Stone, (Fri Oct 18, 9:36 pm)
Re: [LAU] OT - Audio and Video Synch, Len Ovens, (Fri Oct 18, 10:43 pm)
Re: [LAU] OT - Audio and Video Synch, Ralf Mardorf, (Fri Oct 18, 10:58 pm)
Re: [LAU] OT - Audio and Video Synch, Len Ovens, (Fri Oct 18, 11:28 pm)
Re: [LAU] OT - Audio and Video Synch, Simon Wise, (Mon Oct 21, 6:00 am)
Re: [LAU] OT - Audio and Video Synch, Ralf Mardorf, (Fri Oct 18, 11:36 pm)
Re: [LAU] OT - Audio and Video Synch, Ralf Mardorf, (Fri Oct 18, 11:04 pm)
Re: [LAU] OT - Audio and Video Synch, Ralf Mardorf, (Fri Oct 18, 11:13 pm)
Re: [LAU] OT - Audio and Video Synch, Monty Montgomery, (Fri Oct 18, 10:25 pm)
Re: [LAU] OT - Audio and Video Synch, Ralf Mardorf, (Fri Oct 18, 10:42 pm)
Re: [LAU] OT - Audio and Video Synch, James Stone, (Fri Oct 18, 10:30 pm)
Re: [LAU] OT - Audio and Video Synch, Ralf Mardorf, (Fri Oct 18, 10:10 pm)
Re: [LAU] OT - Audio and Video Synch, Rick Green, (Fri Oct 18, 9:58 pm)
Re: [LAU] OT - Audio and Video Synch, Fons Adriaensen, (Fri Oct 18, 9:58 pm)
Re: [LAU] OT - Audio and Video Synch, Paul Davis, (Fri Oct 18, 9:45 pm)