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Field Dominance ??
Hey guys,
I shot a music video on the HVX200 in 720p 24p (1280×720) and need to deliver both in PAL and NTSC for satellite broadcast. When rendering from Vegas to 720×576 interlaced (PAL) or 720×480 interlaced (NTSC), im not sure abt the Field dominance, is it upper field or lower field first????
Also: in order to preserve the 16:9 aspect ratio of the video, do I have to set the pixel aspect ratio to 1,093 ???
Thanxs guys,
K.R.
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3 Replies
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Dave,
thank you so much for your answer,
I shot in 23,976 and abt your question: I would rather like the video to be seen on a 4:3 screen with letterbox.
abt the framerate: for NTSC the vid is on its 1280×720 progressive timeline that I worked with and I render it out to 720×480 i and no matter what I do, Sony Vegas always gives me lower field first.
abt PAL: I never really got how to conform a file in sony vegas, so my rendering to 720×576 i PAL didnt used to look good. I opened to the final output (1280×720 p) in quick time pro und exported it out to PAL 720×576 i and it looks GREAT ! a very good conversion from 23,976 p to 25 frames interlaced. The file is upper field first though.
so now I have a NTSC version 720×480 i at 29,97 and lower field first
and
a PAL version 720×576 i at 25 and upper field first.
does that make any sense??
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The PAL depends a bit what format / codec you are using.
PAL is normally upper field first, apart from the DV family of formats (DV, DVCAM, DVCPro) which are lower field first.
Except Matrox produced a DV codec with upper field first that was in use with some of their hardware for a while .. which is non-standard, not supported by anyone else, may have largely died out.
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[Kevin Reinicke] “I would rather like the video to be seen on a 4:3 screen with letterbox.”
Did you check with whoever is broadcasting this? Some places here in PAL-land, at least, prefer anamorphic.
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