EX1 - Slow Shutter - Motion Blur With No Refresh Stutter? 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 May 25th, 2010, 11:32 AM   #1
Major Player
 
Join Date: Apr 2008
Location: Way Far Away
Posts: 230
EX1 - Slow Shutter - Motion Blur With No Refresh Stutter?

Hello Folks,

I'm experimenting with a slow shutter on the EX1.

I would like to know if anyone has been able to achieve a look where, for example, you have crowds of people passing in front of the camera and the people are completely blurred without any delay in movement.

With a slow shutter speed of let's say 8, if I understand correctly, the camera is refreshing once ever 8 frames while 7 frames remain static. This is not creating a smooth flow of movement but rather a jerky flow.

I would like to find a way to 'knock out these 7 frames in camera (but I don't believe this is not possible).... so I've been doing it in post... a hugely tedious process.

Anyone have any ideas on how to maximize the blur movement flow of people without the jerky refreshing rate?

Big thanks :)
Jonathan Bland is offline   Reply With Quote
Old May 25th, 2010, 12:52 PM   #2
Inner Circle
 
Join Date: Apr 2006
Location: Wales
Posts: 2,130
Remember that your frame rate is dictated by your shutter speed, in that if you have a shutter speed of 1/8 second then obviously the maximum frame rate you can have will be 8 frames per second.
At a shutter speed of 1/8, no there are no "static frames", it's a whole frame at 1/8 second.
Steve
Steve Phillipps is offline   Reply With Quote
Old May 25th, 2010, 02:20 PM   #3
Trustee
 
Join Date: Nov 2006
Location: Honolulu, HI
Posts: 1,430
What you're describing is best done in post. With Edius 5.5, add motion blur and you'll get exactly what you want in real time, no rendering necessary.
Warren Kawamoto is offline   Reply With Quote
Old May 25th, 2010, 03:09 PM   #4
Regular Crew
 
Join Date: Mar 2008
Location: Middlesex, UK
Posts: 28
The trick would be to use interval recording in conjunction with frame accumulation to skip the redundant frames.

Divide your shutter speed by your frame rate and set the interval record to that number or as close as you can get to it. This works best for shutter speeds greater than your frame rate (32 and 64).

For example if your frame rate is 30 and shutter speed is 64, set the interval record to 2 seconds.

I'm assuming you work in progressive. I'm yet to test it with interlaced footage.
Omar Idris is offline   Reply With Quote
Old May 26th, 2010, 06:58 AM   #5
Major Player
 
Join Date: Jun 2006
Location: Studio Alnitak, Melbourne, Victoria, Australia
Posts: 640
Images: 3
setting EX slow shutter to 16 frames with interval set to 1 sec with 3 frames taken gives a nice effect without excessive time acceleration.
Serena Steuart is offline   Reply With Quote
Old May 26th, 2010, 09:15 AM   #6
Sponsor: Abel CineTech
 
Join Date: Feb 2009
Location: New York, NY
Posts: 360
I wrote up a blog about time lapse shooting awhile back. I made a video combining slow shutter and time lapse. See my blog here -http://blog.abelcine.com/2009/06/24/time-lapse-recording/
__________________
Andy Shipsides -Camera Technology Specialist
AbelCineTech, New York - Visit our Blog - http://blog.abelcine.com
Andy Shipsides is offline   Reply With Quote
Old May 26th, 2010, 05:30 PM   #7
Major Player
 
Join Date: Apr 2008
Location: Way Far Away
Posts: 230
Hi Folks,

Big thanks to all of your for the replies.

Again just to touch on the main point....... I'm only interested in achieving a look where all movement is blurred and flows without the intermittent stop/ start of time lapse.

I think it would be something like a 360 degree shutter... or no shutter at all.

Serena.... I'll give your suggestion a shot. Thanks for that.
Jonathan Bland is offline   Reply With Quote
Old May 27th, 2010, 08:48 AM   #8
Regular Crew
 
Join Date: Jun 2008
Location: Stockholm, Sweden
Posts: 157
Jonathan, you want the same effect as I thought I could get when I saw "slow shutter" on the cameras specifications. I was a little disappointed when I realised that it was only a longer shutter time told in a different way.
Sverker Hahn 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 10:59 PM.


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