Is 24PN really 24fps or is it 23.98fps?

[rcjaffe]

I'm recording sound on a separate device like a film shoot. I need to know if the 720/24PN mode is really running at 24fps or if its truly running 23.98fps.

If it's 24fps I'll run my audio recorder at 30fps NDFTC/48.048kHz sampling rate so when I pull the video down to 23.98 the sound will stay in sync being pulled down to 29.97/48.000kHz.

If it's recording 23.98fps in camera I'll record audio directly at 29.97/48kHz.

In the end things have to match up with film being telecined and pulled down from 24 to video at 23.98. The final conformed HD master will be 1080/23.98. The 720p will be uprezed to 1080p.

Thanks,
RJ

[THoff]

24P on the HVX200 is really 23.98, 30P is 29.97, and 60P is 59.94.

[TwistedLincoln]

24P on the HVX200 is really 23.98.

I thought 24p was really 23.976, no?

[rcjaffe]

I found this link that kind of answers my own question direct from Panasonic.

(http://shop.panasonic.com/webapp/wcs/stores/servlet/prModelDetail?storeId=11301&catalogId=13251&itemId=95592&modelNo=Content12072005012903035&surfModel=Content12072005012903035)http://shop.panasonic.com/webapp/wcs/stores/servlet/prModelDetail?storeId=11301&catalogId=13251&itemId=95592&modelNo=Content12072005012903035&surfModel=Content12072005012903035 (http://shop.panasonic.com/webapp/wcs/stores/servlet/prModelDetail?storeId=11301&catalogId=13251&itemId=95592&modelNo=Content12072005012903035&surfModel=Content12072005012903035)

How does the HVX200 record 24P?
It shoots every frame as a progressive frame, so it is true 24P (more accurately known as 23.98 fps). In most recording modes, duplicate frames are added in a 2:3 or a 2:3:3:2 pull-down cadence and the progressive frames are divided into two fields in order to conform to existing interlace 29.97 formats. The 2:3 mode follows all of the conventions of film to tape transfer, so that the recorded material can be treated as a film transfer or in the 2:3:3:2 mode it can be extracted for 24 frame editing. In the 720p "Native Capture" mode only flagged frames are captured with 23.98 time code; these files are directly compatible with a 720p 24-frame timeline, and require only 40% of the storage capacity of 720p 60 fps or 1080i HD recording.

Thanks for everyone's help. I hope it works.

RJ

[rcjaffe]

I believe 23.98 is just 23.976 rounded up. AfterEffects wants to see 23.976 but the same footage in FCP could be put on a 23.98 timeline. I work at a post facility and we use them interchangeably like that. It all depends on the program you're working in. But it is very different than true 24.

RJ

[Barry_Green]

"true" 24p (meaning 24.000 fps) is something that 97.5% of us will never encounter. For all practical purposes, 24p on video always means 23.976 fps.