Film-Tech Cinema Systems
Film-Tech Forum

my profile | my password | search | faq & rules | forum home
  next oldest topic   next newest topic
» Film-Tech Forum   » Operations   » Digital Cinema Forum   » HDCAM and interlace jaggies

Author Topic: HDCAM and interlace jaggies
Mike Olpin
Chop Chop!

Posts: 1852
From: Dallas, TX
Registered: Jan 2002

 - posted 11-15-2008 12:49 PM      Profile for Mike Olpin   Email Mike Olpin   Send New Private Message       Edit/Delete Post 
How do I make them go away?

Sony J-H3 connected to a Barco ACS-2048 via component video.
The DVD player connected in exactly the same way produces no interlace lines, even though its only 480.

Is there an output setting in one of the J-H3's many confusing menu functions that allows me to force progressive out?

 |  IP: Logged

Scott Norwood
Film God

Posts: 8146
From: Boston, MA. USA (1774.21 miles northeast of Dallas)
Registered: Jun 99

 - posted 11-15-2008 01:36 PM      Profile for Scott Norwood   Author's Homepage   Email Scott Norwood   Send New Private Message       Edit/Delete Post 
Does this happen with all tapes or just one? It may be the tape itself (well, the post house that recorded it) that is defective. Every film festival seems to have at least one such tape.

Menu item #13 lets you change the frame rate and such, but you probably already know that this has to be set to whatever the tape was recorded with (usually either 59.94i or 23.98PsF), otherwise you won't get sound and the picture will play at the wrong speed. The J-H3 won't convert frame rates or interlace/progressive, however; it just outputs whatever format was used when the tape was recorded (same with NTSC/PAL on a J-30).

 |  IP: Logged

Bobby Henderson
"Ask me about Trajan."

Posts: 10973
From: Lawton, OK, USA
Registered: Apr 2001

 - posted 11-15-2008 02:48 PM      Profile for Bobby Henderson   Email Bobby Henderson   Send New Private Message       Edit/Delete Post 
I'm pretty sure any video content shot in an interlaced format needs to be shown interlaced. If the video is converted at all into a progressive video stream you're going to see the sawtooth artifacts more easily due to the 1/60 second time difference between recording the two fields of each frame.

 |  IP: Logged

Cameron Glendinning
Jedi Master Film Handler

Posts: 845
From: West Ryde, Sydney, NSW Australia
Registered: Dec 2005

 - posted 11-15-2008 04:07 PM      Profile for Cameron Glendinning   Email Cameron Glendinning   Send New Private Message       Edit/Delete Post 
quote: Bobby Henderson
I'm pretty sure any video content shot in an interlaced format needs to be shown interlaced
Unfortunately video projectors tend to be progressive by nature and have to convert i to p .

 |  IP: Logged

All times are Central (GMT -6:00)  
   Close Topic    Move Topic    Delete Topic    next oldest topic   next newest topic
 - Printer-friendly view of this topic
Hop To:

Powered by Infopop Corporation

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.

© 1999-2020 Film-Tech Cinema Systems, LLC. All rights reserved.