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Re: Producing good quality video in a lab

Posted by Toby on 02/06/06 12:41

"Mark" <nospam@nospam.com> wrote in message
news:ds30u5$1ct$1@daisy.noc.ucla.edu...
> Hi,
>
> We are in a university department, and want to produce some good video of
> rats performing a task - good enough for the media.
>
> We are planning on using a mini-dv camera (that's the format they want).
>
> There are a number of concerns:
>
> * I know that lighting is critical, particularly when there is only
> artificial light available. Since this will be a one-off, we don't want to
> buy lights. What would the best lights be to use that we have hanging
> around. Are incandescent lights okay? What about fluros? Perhaps a
> combination of both? I think the lab is lit with fluros, but we can
> probably supplement this with globes. Are there particular incandescent
> globes that give good light for video?
>
> * We are thinking of using a PAL camera, and then converting to NTSC. Does
> software conversion do this okay? We do currently have Adobe Premiere.
> Does that do it with good results? Any recommendations for other software,
> hopefully free?
>
> * The camera can record in both interlaced and progressive scan. Should we
> use interlaced given that the footage might be broadcast? Or do the tv
> networks now prefer progressive?

Hi Mark,

I work as cameraman/editor for "the media", and here are my suggestions.

Good fluorescent lighting is fine, if rather boring. Basically you are OK
with that. Don't bother with lights, especially if you are going to be
shooting from different angles. Mixed fluorescent/incandescent lighting is
generally bad, because of the difference in color temps.

Do NOT shoot on PAL--most stations (especially in the US) can only handle
NTSC. Any PAL footage they get is generally converted prior to being
uplinked or sent. Conversion from PAL to NTSC is much worse than conversion
from NTSC to PAL, as motion-interpolated frames have to be created in the
conversion, resulting in loss of resolution and jerky moves. Good conversion
is very expensive. Software, such as Canopus ProCoder, will convert, but it
is pretty basic, and the program is not anywhere near free. There must be
thousands of miniDV NTSC cams on campus. Use one.

In addition you will have flicker problems using fluorescent lighting in the
USA (60 Hz) with PAL (50 Hz).

For TV use interlaced, not progressive.

HTH,

Toby

 

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