Down-converting focus problems? at DVinfo.net

Go Back   DV Info Net > JVC ProHD & MPEG2 Camera Systems > JVC GY-HD Series Camera Systems

JVC GY-HD Series Camera Systems
GY-HD 100 & 200 series ProHD HDV camcorders & decks.


Reply
 
Thread Tools Search this Thread
Old May 4th, 2006, 11:09 AM   #1
Regular Crew
 
Join Date: Dec 2004
Posts: 73
Down-converting focus problems?

I have read that if you down-covert HDV to DV, there could be some focus problems, as what is in focus for HDV may not be the case when down-converting for DVD.

Has anybody had any problems with this and how would you get around it?

Thanks
Simon Antoniou is offline   Reply With Quote
Old May 4th, 2006, 11:23 AM   #2
Wrangler
 
Join Date: Oct 2002
Location: Los Angeles, CA
Posts: 2,100
It's more the other way around. Focus problems when shooting in HDV that are apparent on a good HD display can go away when downconverted. It just depends how badly out of focus you were.

Put another way...focus is critical and easy to mess up when shooting in HD because of how much detail HD can resolve. Upon downconversion, much of that detail is lost, so if there were small errors in focus, often they get "covered up".

Make sense?
__________________
My Work: nateweaver.net
Nate Weaver is offline   Reply With Quote
Old May 4th, 2006, 11:45 AM   #3
Regular Crew
 
Join Date: Dec 2004
Posts: 73
Thanks Nate, I guess you just have to make sure your focus is exemplary, which is critical when shooting HD anyway.
Simon Antoniou is offline   Reply With Quote
Old May 4th, 2006, 12:12 PM   #4
Wrangler
 
Join Date: Oct 2002
Location: Los Angeles, CA
Posts: 2,100
Quote:
Originally Posted by Simon Antoniou
Thanks Nate, I guess you just have to make sure your focus is exemplary, which is critical when shooting HD anyway.
...unless you're downconverting to SD for your end product. Then you have a little room for error.
__________________
My Work: nateweaver.net
Nate Weaver is offline   Reply With Quote
Old May 4th, 2006, 01:18 PM   #5
Major Player
 
Join Date: Dec 2005
Location: Burnaby & Maple Ridge BC
Posts: 282
One other thing to keep in mind is that some editing applications do not do a very good job down-scaling HDV to DV resolution. Premiere Pro 1.5 is one of them. I've tried downscaling HDV footage within an NTSC DV project and the results were very soft. The same procedure done in After Effects was significantly sharper. Likewise, using Premiere Pro to export a HDV project directly to DVD (without going to DV first) seemed to work well too. (It may be relying on the Main Concept scaling algorithm rather than its own.)

It's a good idea to test all the options available to you to see which procedure produces the best results.
__________________
Earl R. Thurston
Director of Digital Media Services
Stargate Connections Inc.
Made with GY-HD100: The Container Adventures: The Rescue
Earl Thurston is offline   Reply With Quote
Old May 4th, 2006, 01:25 PM   #6
Wrangler
 
Join Date: Oct 2002
Location: Los Angeles, CA
Posts: 2,100
Right. I went on a rant on that subject in: http://www.dvinfo.net/conf/showthread.php?t=63494
__________________
My Work: nateweaver.net
Nate Weaver is offline   Reply With Quote
Old May 25th, 2006, 11:27 PM   #7
Inner Circle
 
Join Date: Jan 2006
Posts: 2,290
Quote:
Originally Posted by Earl Thurston
One other thing to keep in mind is that some editing applications do not do a very good job down-scaling HDV to DV resolution. Premiere Pro 1.5 is one of them.
I've never seen this point made before. So which PC programs ARE good for downconverting to SD? (aside from Abobe AE) Vegas? Avid?
Brian Luce 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 > JVC ProHD & MPEG2 Camera Systems > JVC GY-HD Series Camera Systems

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 02:27 AM.


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