Is JVC HD*** 24fps or 23.976fps at DVinfo.net

Jack Walker · March 5th, 2007, 02:42 PM

Are the JVC cameras recording at a true 24fps or at 23.976 fps.

To explain what I am talking about, here is a chart about the differences:
http://24p.com/24p_audio_workflow.htm

Tim Dashwood · March 5th, 2007, 02:55 PM

23.976 (aka 23.98)

All 24P video formats that use 60Hz (59.94fps or 29.97fps) as their base will actually be 23.976 in a pulldown. This includes film to tape telecine transfers. The exception is a PsF systems like HDCAM which can actually clock itself to exactly 48Hz if needed, but it would still need to playback at 23.976 for DVD or broadcast, just like film transferred to video.

Shaun Wilson · March 5th, 2007, 04:46 PM

It's true 24p if you're set at 50Hz right?

Tim Dashwood · March 5th, 2007, 04:49 PM

Quote:

Originally Posted by Shaun Wilson

It's true 24p if you're set at 50Hz right?

You can't shoot 24P in 50Hz mode... only 25P, but 25 is 25 and 50 is 50.

Jason Nolte · March 6th, 2007, 08:59 AM

But 30P is true 30P and not 29.97?

Nate Weaver · March 6th, 2007, 10:14 AM

No, it's 29.97.

Keep in mind guys that "true" in this case is pretty meaningless. The fractional differences in speed exist so you can work within the digital video world without having to worry about losing sync with all manner of other devices.

It's a good thing, not a bad thing.

The only devices in the world that are locked to only 24.00fps are film projectors.

Mark Silva · March 6th, 2007, 10:57 AM

I'm so tired of hearing "true" tacked onto everything lately.

It begins to make everything meaningless unless its also true.

Stephen L. Noe · March 6th, 2007, 04:20 PM

Quote:

Originally Posted by Mark Silva

I'm so tired of hearing "true" tacked onto everything lately.

It begins to make everything meaningless unless its also true.

But I can understand the question. Some NLE's will literally cut 24fps or 23.98 video. Let's say you're working with a "true" (sorry) 24fps targa frame sequence.

March 5th, 2007, 02:42 PM	#1
Jack Walker Trustee Join Date: Jun 2006 Location: Burbank Posts: 1,811	Is JVC HD* 24fps or 23.976fps** Are the JVC cameras recording at a true 24fps or at 23.976 fps. To explain what I am talking about, here is a chart about the differences: http://24p.com/24p_audio_workflow.htm

March 5th, 2007, 02:55 PM	#2
Tim Dashwood Wrangler Join Date: Aug 2005 Location: Toronto, ON, Canada Posts: 3,637	23.976 (aka 23.98) All 24P video formats that use 60Hz (59.94fps or 29.97fps) as their base will actually be 23.976 in a pulldown. This includes film to tape telecine transfers. The exception is a PsF systems like HDCAM which can actually clock itself to exactly 48Hz if needed, but it would still need to playback at 23.976 for DVD or broadcast, just like film transferred to video. __________________ Tim Dashwood

March 6th, 2007, 10:14 AM	#6
Nate Weaver Wrangler Join Date: Oct 2002 Location: Los Angeles, CA Posts: 2,100	No, it's 29.97. Keep in mind guys that "true" in this case is pretty meaningless. The fractional differences in speed exist so you can work within the digital video world without having to worry about losing sync with all manner of other devices. It's a good thing, not a bad thing. The only devices in the world that are locked to only 24.00fps are film projectors. __________________ My Work: nateweaver.net

March 5th, 2007, 04:46 PM	#3
Shaun Wilson Regular Crew Join Date: May 2006 Location: Hobart, Australia Posts: 41	It's true 24p if you're set at 50Hz right?

March 6th, 2007, 08:59 AM	#5
Jason Nolte Regular Crew Join Date: Jan 2007 Location: Denver, CO Posts: 29	But 30P is true 30P and not 29.97?

March 6th, 2007, 10:57 AM	#7
Mark Silva Major Player Join Date: Apr 2006 Location: Pacific NW Posts: 431	I'm so tired of hearing "true" tacked onto everything lately. It begins to make everything meaningless unless its also true.