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P vs PN
wnats the difference between 25P mode and 25PN mode ? which one is better for post-production and 3d tracking ?
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19 Replies
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The N mode indicates the P2 card captures only progressive frames with no pulldown. For example on an NTSC HVX200 instead of capturing 24p + 3:2 pulldown to make an NTSC compatible 60i signal it just captures 24 frames per second onto the card. That means easier editing and more record time. Perhaps someone else can chime on in a PAL model as there’s no pulldown in the first place to leave out.
Noah
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[Noah Kadner] “Perhaps someone else can chime on in a PAL model as there’s no pulldown in the first place to leave out.
“Sure there is. If you shoot 720p25, that means it gets recorded as 720p50 with 2:2 pulldown (each frame is doubled so it will be frame1frame1 frame2frame2, etc.) That means when you start doing tracing and effects, you will have to mimic the pulldown cadence in all of your work, otherwise your video will have a 25p motion characteristic and your graphics will have a 50p characteristic. They won’t match very well.
If you shoot 25PN, that means you only get the 25 frames that are needed, all of your graphics and tracking will be done @ 25p with no redundant frames and will generally make your life easier. When you play back out to tape, the 2:2 pulldown will get reinserted evenly across the whole program by FCP.
If I were you, I’d shoot 25pN.
Hope that helps and makes sense.
Jeremy
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Thank you.
…but mot of the special recording abilities do not work in pN mode.. ? -
[Murat Pak] “…but mot of the special recording abilities do not work in pN mode.. ?”
What special recording abilities are you speaking of?
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like one shot and interval recording modes.
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You have to be in ‘VIDEO CAM’ mode for those.
Jeremy
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I am in NTSC land but the same rules should apply,
Another advantage is the recording time and realtime playback of overcranked images. You can get 2.8 times more storage in native mode (in NTSC) then in regular made.
You can also review overcrank images in 60FPS (in NTSC) in playback mode.
Hope this helps.
Emre Tufekci
http://www.productionpit.com -
no in the manual it says “720p” mode there is no “720pN” mode. I also tested, not working.
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another question, what is the difference between cine mode and video mode ?
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Yes there is a 720pN mode. You shoot either 24pN or 30pN in NTSC, or 25pN in PAL.
You set this up in the RECORDING SETUP menu and choose the REC FORMAT and find the 720p/25pN.
Jeremy
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