Posted by Richard Crowley on 09/14/05 14:35

"Kaveh" wrote ...
> Suppose I make this recording onto a DVD, DV or
> whatever. So I have 2 hours' worth of material.
> Obviously I have to chop this up into say 1/2 hour
> chunks for each speaker, then combine on the computer
> with the speaker audio, video, etc.
>
> The big question I have is: if I synchronize the beginning
> of the chunk with the audio, which has been recorded
> separately, will it still be in synch by the end of the 1/2
> hour? In the old analogue days you could not count on this,
> but can we count on this if everything is digital?

Probably not. People come here quite often complaining
about A\V sync where the A and V were recorded separately.
Look back through the archives for r.v.p and r.v.d and see
for yourself.

But that is not necessarily a problem. At every point where
you insert PPT slides (or screen captures from computers,
etc.) into the video track, you have another oportunity to re-
sync the audio and video. I do this regularly and it is no big
deal.

If you distribute presentations in video (NTSC/PAL) form,
the computer screens will lose most of their resolution. So
if they are running any higher resolution than 640x480, much
of the screen content will turn to mush. This is why there are
products like Camtasia and MS Producer, etc. which preserve
the higher computer screen resolution (at the expense of making
the "recordings" playable only on a computer and not on a TV
screen.) But if you are publisher, perhaps the collateral
materials (print, CD-ROM software, etc.) will fill the gap?

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