Klarinet Archive - Posting 000287.txt from 2009/01

From: "Karl Krelove" <karlkrelove@-----.net>
Subj: RE: [kl] TV Audio-Video Synchronization
Date: Wed, 21 Jan 2009 18:34:26 -0500


> -----Original Message-----
> From: Matt Reid [mailto:qmartialarts@-----.com]
>
> Take this into account...
>
> The camera is probably not picking up the sound through the
> microphone, and is probably farther away from the "action" than you
> may think. The microphone is probably close to the "action" and then
> you would have the issue with sync depending on how well the engineer
> is processing the data.

OK, but light travels a lot faster than sound, so there shouldn't be a
noticeable delay between a mic in front of someone's face and the video
taken from a hundred yards (or even two or three hundred) or so away.

>
> OR
>
> The camera is picking up the audio and video, and the audio is coming
> from a public address system, and the camera is physically located far
> beyond the throw of the speakers. Thus you have the video happening
> before the audio, since light travels faster than sound.
>

Sometimes they do that in stadiums - especially noticeable with the big
in-house video screens which don't sync with the microphone sound or its
echoes - but even then the sound that gets broadcast is generally going
through mics in front of the speaker's face. This was a major international
event. I'd hope they had smarter technicians than that working it.

> OR
>
> Last but not least, I have noticed that video engineers sometimes
> don't have a clue about what is going on musically during a video and
> they just make it look good. You can see this happen when multiple
> cameras are recording different instrument sections in an orchestra,
> and then you see the timpani player banging away and there is complete
> silence.
>

Maybe will happen in all the re-showings, but yesterday was live. It was a
little odd at times during the entry procession, though, to be seeing shots
of one immediately recognizable politician back inside the Capitol while
hearing the sound of some other dignitary being introduced to the crowd
outside.

> hahahaha
>

Karl

------------------------------------------------------------------
The 2009 Woodwind.Org Donation Drive is going on right now - see
https://secure.donax-us.com/donation/ for more information.
------------------------------------------------------------------