[MacDV] Re: Suggestions for sound capture at wedding

[Peter Tattersall]

Are you putting the mike on the stationary, distant, camera (parabolic 
reflector, maybe?)? I'm afraid that's what it sounds like from your 
description. In that case the sound will be out of synch at the 
stationary camera due to the delay due to the speed of sound. The mike 
needs to be close to the source: sound travels at around 340 - 350 m/s 
(depending on air temperature) so if the distant camera is 100 feet 
away it's _very_ roughly 1/10th second out of synch. A separate mike is 
a requirement. I ran into this when taping my daughter's orchestra at a 
music festival. The CD sounded great, but for the video I had to nudge 
the sound over a frame or two to improve the synch - otherwise the 
violin bows were moving down before the music started. I resynched by 
separating the sound and the video in iMovie, then cut a frame at a 
time from the video until it looked right.

On Friday, April 11, 2003, at 08:48  PM, Mark O'Brien wrote:

>
> On Friday, April 11, 2003, at 08:33  PM, ShirleyK wrote:
>
>> I'd think you would just extract the audio from the stationary camera 
>> and use it throughout (having turned off the audio on the video 
>> tracks). Or am I missing something?
>>
>
> I did that, and locked the stationary camera's video to the audio. But 
> then I tried to superimpose the cutaway camera's footage in the 
> timeline, alternating stationary distance shots with close-ups and 
> different angles. Getting those cutaways synchronized is the problem.
>
> I'm probably not explaining it very well. Try it for yourself if you 
> have access to a second camcorder, and you'll see what I'm talking 
> about.
>
> Mark