#ntsc safe zone file
8 messages in this thread
Is there a file somewhere that has an NTSC safe zone box that an be popped into
a flic?
Thanks!
Dave Renneker
Dave:
You can figure on 10% for the safe zone, (actually, I guess that's 90% for the
safe zone, 10% for the un-save zone, but you get the idea!).
You would need to calculate this size depending on the resolution of your flic.
(Of course 3D Studio does this automatically for you… <g>)
Greg Pyros [Pyros Partnership, Inc] gpyros@pyros.com 18-Dec-93 at 2:22p PST
<<You can figure on 10% for the safe zone, (actually, I guess that's 90% for
the safe zone, 10% for the un-save zone, but you get the idea!).
You would need to calculate this size depending on the resolution of your
flic.>>
Thanks for your response. I guess I'm still a little bit confused about monitor
resolution compared to T.V. resolution. How does a 640×480 image appear on a
television screen? Is there extra space around all four edges? The reason I ask
is because I was talking with someone about Targa boards, and he said they are
specifically designed for t.v. production in mind, and work at a fixed
resolution of (something like) 720×640. Does this discrepancy in resolution
matter or is this somehow fixed in the rgb to ntsc conversion process?
Thanks again for your response!
Dave Renneker
The person you have been talking with about Targas is not well informed, if he
says they have a resolution of 720×640. They go to 512×486, which is pretty
good, but not as high as current network broadcast levels, which are 720×486.
The 486 resolution is fixed, for TV, by the way. FWIW
David Taffet
<<The person you have been talking with about Targas is not well informed, if
he says they have a resolution of 720×640. They go to 512×486, which is pretty
good, but not as high as current network broadcast levels, which are 720×486.
The 486 resolution is fixed, for TV, by the way. >>
So if I have an image that is 640×480 that is being transferred to
videotape,what happens? Not only is the 720×486 size bigger, there not even the
same aspect ratio. Will I get empty areas?
Thanks
Dave Renneker
You have two options, depending on the hardware/software used to lay your
animation to tape:
You can rescale preserving your current resolution and get a full screen, but
distorted image,
or you can rescale preserving your current aspect ratio and get an undistorted
image with black borders.
***There is a third option, which I _strongly_ recommend: re-render your
animation with the following res and aspect:
If you will be using a Targa+, then: 512×486 aspect ratio of 1.26
If you will be using a higher resolution card that can support 720×486 like the
ATVista or Illuminator Pro: 720×486 aspect ratio .9
The formula for calculating aspect ratio is this: WIDTH
————— x 1.33 =
aspect ratio
486
(<= 486 is fixed for NTSC)
If you select the Null driver and enter the appropriate resolution and aspect
ratio you can see the image in the CAMERA viewport in the keyframer change
aspect. If you press ALT+E you will get yellow and green boxes that represent
the NTSC safe frame within the current resolution. This will help you set your
camera(s) correctly.
Regards,
John Tissavary (La Luna cie)
If you are planning to go to videotape, find out ahead of time what the output
resolution will be and render to that resolution using the appropriate aspect
ratio. As to what happens if you don't, others will have to tell you, as I've
never done it.
DT
Actualy there are 2 (two) safe zones! 90% is refered to as safe Action (out
side this is often cut off on most TV sets , but due to some what spherical
face plate it is not exactly a box with staight line on every s.
second is ~ 80% and known as Safe Title Zone – so if you have words
you absolutely positivly want to see – stay inside this!
I made my self a GIF file and a CEL that have markes made by using NTSC
monitors and a bit of trial & error – but they are NOT to SMPTE standards ( and
only for 640×480)
I also used a pencile to make marks on computer monitor bezel at both
action & title zones – then lay staight edge across if in question.
What happens to stuff thats outside zone – it hides behind tv sets
bezel some "Pro" monitors underscan so you can see it, or you can climb inside
your set and twiddle some knobs (not recomended) hope this helps some dave
wright – wyeknot, inc