Need help with deflickering of video of projector screen at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Open DV Discussion
For topics which don't fit into any of the other categories.


Reply
 
Thread Tools Search this Thread
Old May 31st, 2010, 12:31 PM   #1
Trustee
 
Join Date: Mar 2009
Location: Santa Clara, CA
Posts: 1,104
Need help with deflickering of video of projector screen

I shot a video of a technical symposium in which the speakers used a PC attached projector. I am getting a great deal of flicker on the shots of the projector screen. I have experimented with both the Donald Graft and MSU deflicker filters in VirtualDub without much success.

The video was shot with a Sony EX1R at 1920 x 1080, 60i. I would appreciate any suggestions.
Jim Snow is offline   Reply With Quote
Old May 31st, 2010, 02:40 PM   #2
Inner Circle
 
Join Date: Jan 2007
Location: Woodinville, WA USA
Posts: 3,464
Have you played with the ECS FREQUENCY settings, page 51?
__________________
"It can only be attributable to human error... This sort of thing has cropped up before, and it has always been due to human error."
Adam Gold is offline   Reply With Quote
Old May 31st, 2010, 04:11 PM   #3
Trustee
 
Join Date: Mar 2009
Location: Santa Clara, CA
Posts: 1,104
I haven't tried ECS. I would love to know more about it. Sony's brief two sentences in the manual don't give any application tips on it. If anyone has any helpful links, please post.
Jim Snow is offline   Reply With Quote
Old June 1st, 2010, 01:03 PM   #4
Trustee
 
Join Date: Nov 2006
Location: Honolulu, HI
Posts: 1,430
Quote:
Originally Posted by Adam Gold View Post
Have you played with the ECS FREQUENCY settings, page 51?
The ECS frequency settings are only good at the time you're shooting the screen, not after.

It sounds like you're experiencing the moire effect, this happens when you shoot a high resolution video display. You could try de-tuning the video by adding a slight blur or soft focus over the shot of the screen, it might help.
Warren Kawamoto is offline   Reply With Quote
Old June 1st, 2010, 08:04 PM   #5
Inner Circle
 
Join Date: Jan 2007
Location: Woodinville, WA USA
Posts: 3,464
Quote:
Originally Posted by Warren Kawamoto View Post
The ECS frequency settings are only good at the time you're shooting the screen, not after.
Well, yes, of course, better to prevent the problem in the first place than to try to fix it, no? Sounded like this was an ongoing project...
__________________
"It can only be attributable to human error... This sort of thing has cropped up before, and it has always been due to human error."
Adam Gold is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 10:18 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network