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Old April 21st, 2008, 11:32 AM   #1
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Join Date: Dec 2005
Location: Santa Cruz, CA
Posts: 133
Field Jumping

Hey all,

We have been doing 3 camera production for a while with the XL-H1 in HDV mode. The production and post have gone very smoothly aside from the long render times to SD DVD.

One client is reporting an odd phenomenon:
When the SD DVD is played on a 16:9 LCD, plasma, etc. all is great.
When it is played on a good quality 4:3 it letterboxes just fine and looks great.
When played on a cheap 4:3 tv, the line between content and the letterbox bars seems to jump fields consistently.
Apparently all of the past projects have a similar problem, but no one was looking at them on a tv with bad enough quality. We weren't able to reproduce it on our consumer TVs here. The client (and his in-house IT person) were able to reproduce it on multiple low quality tvs.

We have tried putting a 2 pixel matte in to see if it solves the issue. Apparently its better but not solved, plus it seems like a band-aid solution.

Does anyone have any insight on this? Is it a field priority issue?

Here are all the specs

Shooting specs:
3 cameras HDV 1080 60i DF
Editing in Final cut studio 2 with timeline options to match the source
Exporting via compressor SD DVD 6.2mbps dual pass VBR with better resizing.
Authoring & burning in DVDSP

Brian Critchlow is offline   Reply With Quote
Old April 22nd, 2008, 04:23 AM   #2
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Join Date: Jul 2006
Location: Springfield, Missouri
Posts: 117
Try just slightly blurring the edge of the letterbox if you can. If the edge is represented by 1 HD line of resolution, playback on an SD TV can cause that line to disappear and reappear every scan of the fields.
"Your world is all these elements; of light and sound, of taste, smell, and touch. Woven together in many dimensions on the fabulous loom of your brain. Your brain; the most complicated thing in the world, which you yourself grew...without even thinking about it."
Kent Frost is offline   Reply With Quote
Old April 22nd, 2008, 02:58 PM   #3
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Join Date: Apr 2006
Location: Boston, Massachusetts
Posts: 616
I don't understand "leterbox jumps fields", but I'd be interested to know what you mean. Can you describe this in a different way or tell me what it looks like?
Aric Mannion is offline   Reply

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