Posted by Real Friendly Neighborhood Vote Ranger on 10/11/05 06:04

"Kadaitcha Man" <nospam@fuck-off-and-die.com> wrote in message
news:c7576968b25d4653bf502ffd6d6c5089@soc.med.swingers...
> George Hammond, <ghammond1@earthlink.net>, the bacterial, odoriferous
> miscreant, and dog-whipper, cackled:
>
>
> > [Hammond]
> > Yeah... that's because any computer monitor can be used as
> > a "t.v." if it has the appropriate software for generating
> > a t.v. signal. So what.... there's no way to "edit" a DVD
> > and make an invisble move out of it.
> >
> > Like I say, you'd have to use videotape.... edit it on
> > a computer.... and then play it on a VCR.
>
> So, is that a Phase Alternating Line playback VCR, which plays back at 25
> frames per second, or is it an NTSC VCR, which plays back at 29.97fps
> frames per second unless it's recorded on NTSC film, which records at
> 23.976fps, George?
>
> > Now video films are shot at 30 frames per second,
>
> PAL = 25fps. NTSC = 29.97fps. NTSC Film = 23.976fps.
>
> > OK, this is one second of a conventional 30 frames/sec video tape.
>
> PAL = 25fps. NTSC = 29.97fps. NTSC Film = 23.976fps.
>
> > OK, |NN| represents one frame of an actual movie video shot at
> > 30 frames per second. And |...| represents one frame of
> > a blank gray background also shot a 30 fps. (we're using
> > black & white here to keep it simple).
>
> PAL = 25fps. NTSC = 29.97fps. NTSC Film = 23.976fps.
>
> > Note that every 3rd,4th,5th and 6th frames of the original
> > movie have been deleted and replaced with blank frames,
> > in succession after 2 real frames have been used.

There are many schemes of telecine. None is as good as scanning each frame
as a non-interlaced image. When shooting at matching (30 fps) frame rate,
that'd give the best result.

>
> PAL = 25fps. NTSC = 29.97fps. NTSC Film = 23.976fps.
>
> > This gives us a sequence of 1/15 second of real movie
> > alternated with 1/7.5 second of blank screen.

these numbers look familiar.

>
> PAL = 25fps. NTSC = 29.97fps. NTSC Film = 23.976fps.
>
> > Since it takes the kid 1/8 of a second to see the
> > real photos but they are only flashed for 1/15 of a
> > second.... he will see nothing but a light grey screen
> > with nothing on it.
>
> PAL = 25fps. NTSC = 29.97fps. NTSC Film = 23.976fps.
>
> > The adult however CAN see a picture that is only
> > flashed for 1/15 of a second... so he will see the
> > real movie.
>
> PAL = 25fps. NTSC = 29.97fps. NTSC Film = 23.976fps.
>
> Back to the drawing board, George.

you know about frame rates. he knows about the problem that calls for
telecine.

>
> "Movies on film are shot at a frame rate of 24 fps (frames per second)
while
> NTSC video has a frame rate of 30 fps (actually 29.97) and PAL/SECAM video
> has a frame rate of 25 fps.
>
> These frame rates are too low for a flicker free result when viewing on a
TV
> screen or movie screen."
>
> http://www.disctronics.co.uk/technology/video/video_film.htm
>
> --
> Pierre Salinger Memorial HL&S, September 2005.
>
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