Is the HVX true 24p?

jdv said:
Jim - why is that so? Is there a reason why it's not just an actual one for one 24 frames per second?
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http://www.equipmentemporium.com/23_976_timecode.htm

"High Definition Cameras are in fact capable of running 24 fps progressive scan. This is different than NTSC, which is 29.970 interlaced. If you use 24P (P = Progressive), it must be down converted to 29.97 fps NTSC for video assist or editing on an Avid. Also, when running 24P the audio TC must run at 30 fps. Currently the down conversion from 24P is not practical. A solution is to run the HD camera at 23.976. The High Def conversion to NTSC video can then use the available standards converters.

Again, every fourth frame at 23.976 fps matches every fifth frame at 29.970 fps. What does this mean to the audio Time Code? Just run it at 29.97 fps! The same sync relation from the 3-2 pull down chart holds true. The difference being that there is not a speed change on the audio or video and the sampling rate can stay at 48KHz."

In a nutshell :)
 
I'm guessing it would have to do with equipment timing. Electronically, 23.976 is the only compatable framerate, because 29.97 is the framerate used by video monitors, computer monitors, software, etc.

That's a very uneducated guess, but hopefully I'm right.

~ John.
 
The Machinist said:
No worries at all. In fact if you've seen 28 days later then you already know what a SD 24fps film out might look like.
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If I recall correctly, this movie was shot with a Cannon XL1S PAL, which isn't able to shoot progressive. So, since it was shot with the XL1S PAL, the correct shooting mode is 50i and not 24fps.
This camera ins't even able to shoot 25p, which would be the correct frame rate in PAL land. Now, if you were talking about the XL2, then yes, it does 25p in PAL land, of course.

November is a good example of SD 24fps film out. And Land of Plenty is a good example of SD 25fps film out.
 
Hahahaha.... repeat


What country is Land of Plenty and is it worth a rental (or even available in the states for that matter)?
 
Jim Arthurs said:
Hi John... here's where I first learned of the this a few years ago and a very good explanation, read the first paragraph... some good resources for CineAlta at this site as well as rental information... dig around...

http://www.hd-cinema.com/producerDP.htm#Quick Guide

Regards,

Jim Arthurs
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Thanks Jim. Some nice infor there, including the advice not to mix frame rates on the tape...

But the HVX has no tape, and will be read as a hard drive by the computer, so does this 'no mixing of frame rates' still apply to P2 cards? I'm guessing not...
John
 
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