Black Grain? Help at DVinfo.net
DV Info Net

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XL and GL Series DV Camcorders > Canon GL Series DV Camcorders
Register FAQ Today's Posts Buyer's Guides

Canon GL Series DV Camcorders
Canon GL2, GL1 and PAL versions XM2, XM1.

Reply
 
Thread Tools Search this Thread
Old August 13th, 2006, 08:45 AM   #1
New Boot
 
Join Date: Apr 2004
Location: Long Island New York
Posts: 14
Black Grain? Help

I was testing outside footage shot on my GL1 and upon playback when watching on tv, I noticed what I describe as "black grain jumping around" on the edges of bright or white things, such as white chairs, or the clouds against the blue sky. Its like pepper flickering. Makes no difference with Frame or Normal, and with ND Filter on/off. I was shooting in Auto Exposure. Is this a case of wrong settings, or is something going bad?
Rich Hopkins is offline   Reply With Quote
Old August 14th, 2006, 04:08 PM   #2
Trustee
 
Join Date: Mar 2006
Location: Boise, Idaho
Posts: 1,997
Fly or Gnat on the lense?

Quote:
Originally Posted by Rich Hopkins
I was testing outside footage shot on my GL1 and upon playback when watching on tv, I noticed what I describe as "black grain jumping around" on the edges of bright or white things, such as white chairs, or the clouds against the blue sky. Its like pepper flickering. Makes no difference with Frame or Normal, and with ND Filter on/off. I was shooting in Auto Exposure. Is this a case of wrong settings, or is something going bad?
Might it have been a fly or gnat on the lense? Just proposing the simple answer beforethe technical wizzards come in with the good answers.

jason
Jason Robinson is offline   Reply With Quote
Old August 14th, 2006, 05:18 PM   #3
Major Player
 
Join Date: Jan 2006
Location: Birmingham, AL USA
Posts: 722
Was it only on your tv? What about playback to your computer?
Nick Weeks is offline   Reply With Quote
Old August 15th, 2006, 11:53 AM   #4
New Boot
 
Join Date: Apr 2004
Location: Long Island New York
Posts: 14
Grain

I brought the footage into FCP and it is on the footage, not just the tv. I guess I can describe it as "noise" When it shows on the TV it jumps around. I can only notice it mostly on the white areas in the footage
Rich Hopkins is offline   Reply With Quote
Old August 15th, 2006, 12:22 PM   #5
Major Player
 
Join Date: Jan 2006
Location: Birmingham, AL USA
Posts: 722
That sounds kinda odd, can you take a screenshot or post a sample video?
Nick Weeks is offline   Reply With Quote
Old August 16th, 2006, 04:00 AM   #6
Wrangler
 
Join Date: Sep 2001
Location: Northern VA
Posts: 4,488
What were the shooting conditions (e.g., light level, atmosphere, etc.) and what are the exposure settings the camera used for the video (gain, f-stop, shutter.).

Is it painfully obvious, or a subtile effect many viewers would not notice if they were not looking for it. It may be an artifact of the compression/decompression used in DV.
__________________
dpalomaki@dspalomaki.com
Don Palomaki 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...

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

Scan Computers Int. Ltd.
+44 0871-472-4747
Bolton, Lancashire UK


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 > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XL and GL Series DV Camcorders > Canon GL Series DV Camcorders


 



All times are GMT -6. The time now is 01:07 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network