Motion Artifacts in PMW EX3 at DVinfo.net

Go Back   DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony XDCAM EX Pro Handhelds

Sony XDCAM EX Pro Handhelds
Sony PMW-300, PXW-X200, PXW-X180 (back to EX3 & EX1) recording to SxS flash memory.


Reply
 
Thread Tools Search this Thread
Old October 28th, 2009, 12:11 AM   #1
Regular Crew
 
Join Date: Feb 2009
Location: MUMBAI INDIA
Posts: 109
Motion Artifacts in PMW EX3

I am shooting a feature film on PMW EX3 with nanoflash.It is a outdoor bright sunny day. While moving the camera I see lot of jerky movements while replaying it.Even the slightest movement of the camera is not smooth.Please help.
Ramji Meena is offline   Reply With Quote
Old October 28th, 2009, 01:21 AM   #2
Major Player
 
Join Date: Sep 2008
Location: Vancouver, Canada
Posts: 975
These comments assume the settings in your camera may be off..

Have you accidentally set your camera up to do "interval recording" in the menus? Easy fix would be to go into the menus and make sure "interval recording" is turned off as well as "frame recording".

I don't think you are talking about the "stepping" you can get in pans with 24 frame recording. However, if you are shooting at 24 frames try shooting at 30P fps, if you haven't tried this already.
Andrew Stone is offline   Reply With Quote
Old October 28th, 2009, 02:25 AM   #3
Regular Crew
 
Join Date: Feb 2009
Location: MUMBAI INDIA
Posts: 109
Thank you Andrew. I am shooting a film and 24P is a must for printing on film. Yes the frame recording and interval recording functions are off. Can you suggest any special setting to reduce the “stepping”
Ramji Meena is offline   Reply With Quote
Old October 28th, 2009, 02:36 AM   #4
Major Player
 
Join Date: Nov 2006
Location: Munich Germany , Singapore ,NSW Australia
Posts: 419
What shutter speed are you on? are you on slow shutter?
__________________
Website: http://www.Motiononcanvas.com Camera Operator in Sydney Australia and Singapore.
David Chia is offline   Reply With Quote
Old October 28th, 2009, 02:40 AM   #5
Major Player
 
Join Date: Sep 2008
Location: Vancouver, Canada
Posts: 975
Ramji,

Sorry I didn't connect the dots "feature film"... yes 24 frames...

Still trying to determine if it is the 24 FPS that is causing the jerkiness or if it is the camera or the way you have configured your nanoFlash. If it isn't the 24 FPS and you feel you have ruled out the camera, then I would suggest taking this question into the nanoFlash forum.

Have you tried doing some test footage at 30P to see if the jerkiness disappears? I understand that you have to shoot at 24P but you want to know for certain your issue is that and not some other technical thing that will ruin the whole project.
Andrew Stone is offline   Reply With Quote
Old October 28th, 2009, 05:10 AM   #6
Inner Circle
 
Join Date: Dec 2005
Location: Bracknell, Berkshire, UK
Posts: 4,957
What are you monitoring with? Are you using a 24P monitor
__________________
Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com
Alister Chapman is offline   Reply With Quote
Old October 28th, 2009, 05:41 AM   #7
Regular Crew
 
Join Date: Feb 2009
Location: MUMBAI INDIA
Posts: 109
.It seems the problem is with shutter speed.Can you please tell me what should be the appropriate shutter speed for outdoor and indoor ?Thanx.
Ramji Meena is offline   Reply With Quote
Old October 28th, 2009, 07:28 AM   #8
Trustee
 
Join Date: Sep 2004
Location: Chislehurst, London
Posts: 1,724
Try a shutter speed that is double the frame rate. i.e. for 24 fps use 1/48 or 1/50. Using a faster shutter speed will mean you are only exposing for a fraction of the 24 fps speed, which may result in jerky movement. By default the shutter speed usually matches the frame rate or 1/24 second for 24 fps.

As Alister suggests, try a different monitor. It could also be that your computer is not feeding the signal out fast enough, hence jerky movement.
__________________
Eyes are a deaf man’s ears. Ears are a blind man’s eyes
Vincent Oliver is offline   Reply With Quote
Old October 28th, 2009, 07:30 AM   #9
Inner Circle
 
Join Date: Apr 2006
Location: Wales
Posts: 2,130
General rule is 180 degree shutter (you can set this in the EX3 menus) or for 24P that would therefore be 1/50th sec. This gives the best balance between lack of blur and lack of strobing.
I've asked lots of questions about the effects of the EX rolling shutter on pans, but many others don't think it's an issue, and I'm not going to raise it again here!!!
Steve
Steve Phillipps is offline   Reply With Quote
Old October 28th, 2009, 09:53 AM   #10
Regular Crew
 
Join Date: Feb 2009
Location: MUMBAI INDIA
Posts: 109
Thank you so much Steve Phillipps and Vincent Oliver. Tomorrow i will try all the suggestions and will let you know.I am also trying the various picture profile recepies.Thank you.
Ramji Meena is offline   Reply With Quote
Old October 28th, 2009, 01:02 PM   #11
Regular Crew
 
Join Date: Sep 2003
Location: gloucestershire uk
Posts: 93
Ramji, I'm in a similar boat and after posting here and elsewhere I am hoping it is the way I am currently monitoring my footage. Would the matrox mx02 allow me to monitor my 25p 50 ex3 footage on a dell 24" display correctly?
David Herman 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 > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony XDCAM EX Pro Handhelds

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 06:05 AM.


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