F350 / F355 Slow Motion at DVinfo.net
DV Info Net

Go Back   DV Info Net > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony ENG / EFP Shoulder Mounts

Sony ENG / EFP Shoulder Mounts
Sony PDW-F800, PDW-700, PDW-850, PXW-X500 (XDCAM HD) and PMW-400, PMW-320 (XDCAM EX).

Reply
 
Thread Tools Search this Thread
Old July 7th, 2008, 03:41 PM   #1
Inner Circle
 
Join Date: Apr 2006
Location: Wales
Posts: 2,130
F350 / F355 Slow Motion

Anyone know why the overcranking on the F350 is half the bit rate of standard shooting? Sounds so counter-intuitive, you'd think it would need more as there's more data per second. So even if it only stayed the same you'd expect a drop in quality, but halving the bit rate - why?
Just got my hands on an F350, and the slomo looks smooth, and the quality looks decent, but I had heard comments about it being hard to distinguish it from the normal speed stuff, and frankly that's nonsense! I can see the difference clearly even on an SD TV set! Still looks pretty good though - kind of like the difference between 1080 and 720 on an HDX500 I once used.
Steve
Steve Phillipps is offline   Reply With Quote
Old July 7th, 2008, 04:46 PM   #2
Inner Circle
 
Join Date: Dec 2005
Location: Bracknell, Berkshire, UK
Posts: 4,957
in effect when you shoot at 50p you are recording 50 frames per second at 35mbps, but the material is flagged to playback at 25fps so you only use half of the 35mbps 50 frames per second which is 17.5mbps.
__________________
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 July 8th, 2008, 03:54 PM   #3
Wrangler
 
Join Date: Oct 2003
Location: DFW area, TX
Posts: 6,117
Images: 1
Quote:
Originally Posted by Alister Chapman View Post
in effect when you shoot at 50p you are recording 50 frames per second at 35mbps, but the material is flagged to playback at 25fps so you only use half of the 35mbps 50 frames per second which is 17.5mbps.
The vertical resolution is halved to 540 when overcranking beyond 30 fps.

-gb-
Greg Boston 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 > Sony XAVC / XDCAM / NXCAM / AVCHD / HDV / DV Camera Systems > Sony ENG / EFP Shoulder Mounts

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



All times are GMT -6. The time now is 04:01 PM.


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