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- Newsgroups: rec.video
- Path: sparky!uunet!peora!tarpit!bilver!bill
- From: bill@bilver.uucp (Bill Vermillion)
- Subject: Re: transferring film to video
- Organization: W. J. Vermillion - Winter Park, FL
- Date: Tue, 29 Dec 1992 15:31:06 GMT
- Message-ID: <1992Dec29.153106.13383@bilver.uucp>
- Keywords: film
- References: <1992Dec28.130818.28367@hemlock.cray.com> <4652@vidiot.UUCP>
- Lines: 43
-
- In article <4652@vidiot.UUCP> brown@vidiot.UUCP (Vidiot) writes:
- >In article <1992Dec28.130818.28367@hemlock.cray.com> n3022@cray.com writes:
- ><>My brother and I used the method (1) that you proposed [recording off of
- ><>the movie screen]. It worked very very well.
-
- ><My question is this:
-
- ><In trying this procedure myself over the weekend, I ended up with a lot of flicker
- ><on the video copy of the movie. I single-stepped the video copy in the VCR and
- ><noticed that the frames alternated a little lighter and darker. ....
-
- >First off your lines are too long. Please make then shorter than 79 characters.
- ^ - Hm Mike, I'd suggest maybe about 75 or less,
-
- >Secondly you are running into the problem of the film being projected at 18
- >frames per second, while video is 59.94 fields per second. The video camera is
- >even picking up the times that the screen is black (while the film is being
- >moved to the next frame and also during the black of the double-bladed shutter).
- >So, the film is being projected at a rate equal to 36 fps. Notice that the two
- >rates are not the same.
-
- >The only correct way is to use professional services that have equipment that
- >will pull the film correctly through the transport, in sync with the recording
- >system.
-
- There are (were) some 8mm/super-8mm projectors that handled this a few
- years ago. Eumig (since gone) made some. They used a 5 blade shutter
- - but they weren't cheap but they weren't what I'd call pro either.
- That solved the flicker as the system drive was changed from a
- variable, with a puck moving in and out across a rotating disk, to a
- fixed gear unit. 5 blades x 18 fps gave an effective 90 fps rate.
- Helps to have a slow vidicon on these things :-)
-
- >Personally these home transfer methods are for the birds. But professional
- >services are going to cost an arm and a leg.
-
- The old Kodak VP-1 was pretty good for it's day. Lacked a bit of
- resolution. But where else could you get a flying spot scanner for
- under $1000 ?
-
- --
- Bill Vermillion - bill@bilver.oau.org bill@bilver.uucp
- - ..!{peora|tous|tarpit}!bilver!bill
-