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This topic comprises 2 pages: 1  2 
 
Author Topic: Video question for Ian Price
Charles Lubner
Film Handler

Posts: 78
From: Milwaukee, WI USA
Registered: Sep 1999


 - posted 05-11-2000 01:36 AM      Profile for Charles Lubner   Author's Homepage   Email Charles Lubner   Send New Private Message       Edit/Delete Post 
Ian, I am told you were a top notch video wall technician before you became a theatre owner. I need some advice on my 2 lobby video montitors which play VHS movie trailers. First, the output is a looping vcr with a coax cable, somewhat thicker than the average house cable. TV 1 is then wired to TV 2 via coax. Both televisions have a funky green glow to them which I cannot fix with the color/contrast/tint controls. It is most noticeable during scenes that should be blue. Also, TV 1 has noticeable scrolling static in the picture, like bad reception. TV 2 has ghosting. These TV's are not very old, maybe 5 years. I'm thinking that the greenish glow might be from a magnetic interference source, but I don't know what. Any help you or anyone else can give would be appreciated!

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000


 - posted 05-11-2000 05:44 AM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
Charles:

If possible, don't use the RF (coaxial) output of the VCR to feed the monitors. You'll get much better quality using composite video and line level audio (RCA plugs). Using composite video should really help the "static" and "ghosting".

When the monitors are fed "video black level", do you see the "funky green glow"? If so, the internal bias settings on the CRT probably need adjusting. Some older monitors had screwdriver-adjustable pots on the back to set the gains and screen voltages to get neutral blacks and whites. Don't adjust them unless you know what you are doing.

Magnetic interference usually causes a color purity problem, visible as uneven color on saturated colors (e.g., with a red screen, you see "blotches" of other colors). If the monitor's internal degausing coils are not doing an adequate job of demagnetizing the CRT, buy a TV degausing coil at Radio Shack to do it manually.

If you see color fringes on lettering or the edges of objects, you may need to have the convergence adjusted.

You're not alone in having poor video presentation. I almost never see a decent quality picture on commercial large-screen or video wall presentations, as theatres and sports bars just don't seem to have the time or money to maintain them properly. Contrary to the hype, maintaining good video presentation in a commercial setting takes real knowledge and effort.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 05-11-2000 05:56 AM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
HA HA HA!

Who'da thought Mr. Kodak himself would be so knowlegeable in VIDEO? That's too funny. Kudos yet again to John!

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000


 - posted 05-11-2000 06:12 AM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
Thanks Brad. "Mr. Kodak" does have a degree in Electronic Engineering, worked both as a projectionist and an electronic service technician, and has a pretty decent home audio/video system with DVD and projection video.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com

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Kyle Smith
Film Handler

Posts: 21
From: Branford, CT, USA
Registered: Oct 1999


 - posted 05-11-2000 08:40 AM      Profile for Kyle Smith     Send New Private Message       Edit/Delete Post 
Hi, everyone! I've been following this forum for awhile now and have finally joined myself. I'm a projectionist at two cinemas: a 12 plex and a twin art cinema. I'm also a video producer/technician. John's suggestions are great. It would even be better if your VCR/Monitor combo had S-Video capability. The S-Video cable separates the luminance/chrominance (Y/C) information. Also, make sure you're not oversaturating your colors, especially reds. Make sure the monitors are placed a suitable distance from audio speakers, if you are using them (I hope so).

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Joe Redifer
You need a beating today

Posts: 12859
From: Denver, Colorado
Registered: May 99


 - posted 05-11-2000 02:20 PM      Profile for Joe Redifer   Author's Homepage   Email Joe Redifer   Send New Private Message       Edit/Delete Post 
Why stop at S-Video? Just use the component outputs of your VCR! I'm sure that John uses the component outputs of his DVD player to his projector. If your VHS VCR doesn't have component outputs, then it should!

VHS RULEZ!!!!!!


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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000


 - posted 05-11-2000 02:41 PM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
I made the assumption that Charles' VCR was a typical consumer model with only RF and composite video output. No indication that it was a S-VHS or professional model.

Joe, what model of VCR do you have that has component output? The quality of a standard VHS tape can't look that much better using component, since it is so bad to begin with.

Sure, I use component output from my DVD.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 05-11-2000 02:49 PM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
Wait, wait, wait just a second there John. You've got a home theater with DVD and projection video. Ok, I can understand that...but no 70mm??? This is not good. How have you lived without it???

Anyone have a spare 35/70 machine we can set up for Mr. Pytlak? Perhaps we could start taking donations ala "the charity to build a film screening room for the Kodak man".

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000


 - posted 05-11-2000 03:01 PM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
My wife TOLERATES my A/V system, and how I like to "put the pedal to the metal" with it. I'd be thrown out of the house, along with the AA-II or JJ I'd like to have at home.

BTW, I bought a pair of AA-II's from the Riviera Theatre in Rochester before it was torn down. They now happily reside in Kodak's 2200 seat "Theater on the Ridge", and are used for employee movie nights. Unfortunately, the last 70mm print we screened was "Far and Away".

We've just installed a new 25 X 63 foot Harkness Hall screen, and use this huge theatre as a laboratory to develop new technology to "Enhance the Theatrical Experience". The theatre was just used for the annual Kodak stockholder's meeting yesterday, May 10.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com


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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 05-11-2000 03:35 PM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
I understand Universal did not save a single print in 70mm of Far and Away. Assuming that info is indeed correct, HOW FOOLISH IS THAT!?

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99


 - posted 05-11-2000 03:37 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
Hey Ian.......seems like everyone is here but yourself. Its always glad to hear that someone else besides myself gave the video the boot. I did too back in the early 80's from broadcast tv. I too have my DVD and DTV but still prefer watching film over video anyday. I will never change in that department either.
Mark

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Ian Price
Phenomenal Film Handler

Posts: 1714
From: Denver, CO
Registered: Jun 99


 - posted 05-11-2000 07:32 PM      Profile for Ian Price   Email Ian Price   Send New Private Message       Edit/Delete Post 
Ta Da! Here I am.

What a night. My Projectionist called in sick. My concessionist called in sick, and Ky called in sick. So we are doing a Thursday night changeover with just two people in the theatre. However, it is slow enough to answer this question.

First off, one should never use VHS for a repeating video display. The tape wears out in about 25 passes. We always tried to use Laser Disc or DVD.

Secondly, you should use the highest quality signal line available, whether that's composite or S-video or component.

Lecture over! I assume you don't want to rip it out and start over. Nor do you want to throw oodles of money at it.

I have had to run RF and learn to love it. You can use the TV speakers and not run an amp and separate speakers. Go to Radio Shack and buy an RF Amp / Splitter(about $35). Install it right in the back of the VCR. See if that reduces some of you problems. Bring in another VCR from home and try it out. The fist one may have a problem.

The interference you see on the second TV may be reduced somewhat by the Amp. Try to move the signal cable to a different location to lessen the interference. If you can, run a second video line from the Amp / Splitter to the second TV. This is called a "Home Run" wire. All wires should be "Home Run" instead of in a loop. Surround wires included.

If all else fails, and you can't fix it, feature it.



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Ian Price
Phenomenal Film Handler

Posts: 1714
From: Denver, CO
Registered: Jun 99


 - posted 05-12-2000 12:17 AM      Profile for Ian Price   Email Ian Price   Send New Private Message       Edit/Delete Post 
P.S. Five years is about all you will get out of a CRT or TV that is on for 12 hours per day. That's a little fact that seems to be skipped over during the sales pitch. Then five years later the video technician gets to hear, "What do you mean, I have to replace my video wall? I paid $50,000 for it!" I wouldn't count on more than five years out of a video projector either. However, I know of some Brenkert film projectors, happily motoring along after 50 years of continuous use.


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John Wilson
Film God

Posts: 5438
From: Sydney, Australia.
Registered: Dec 1999


 - posted 05-12-2000 03:37 AM      Profile for John Wilson   Email John Wilson   Send New Private Message       Edit/Delete Post 
John Pytlak wrote...: "Unfortunately, the last 70mm print we screened was "Far and Away".

Read that any way you wish...



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Joe Redifer
You need a beating today

Posts: 12859
From: Denver, Colorado
Registered: May 99


 - posted 05-12-2000 04:25 AM      Profile for Joe Redifer   Author's Homepage   Email Joe Redifer   Send New Private Message       Edit/Delete Post 
John (Pytlak)-

I went into Sears the other day and asked the seedy salesman "I need a VCR for my bathroom, so I can watch high quality VHS movies from high quality places like Blockbuster while I'm doing my business." The salesperson said "No problem, this unit is on sale today for only $99!" It was a great price. The VCR is made by Emerson. It has component video output(s), Dolby Digital out (they found a way to record and compress it to the linear track), S-Video, composite, RF, and even twin lead outputs! The unit kicks ass! It won't play S-VHS tapes. But boy, those rental tapes from Blockbuster sure look good! I didn't think VHS could get any better! Why would anyone need 70mm when they can have VHS for cheap and RENT the movies?

Of course, I am kidding!


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