23.98 DF or NDF

[Steve Mahrer]

In a nutshell, no. This is one if the very few “standards” in HD, basically all “24P” is NDF.

Cheers!

Steve Mahrer

[Robin Probyn]

So if 23.98p is always NDF,isnt the TC not the true running time? is that the same for Sony camera,s too? 23.98 is always NDF

Thanks

[Gary Adcock]

[Redflag] “So if 23.98p is always NDF,isnt the TC not the true running time? is that the same for Sony camera,s too? 23.98 is always NDF”

The recoding and playback heads are physically slowed down so the timing is actual.

23.98 HDCam masters actually record physically more time on a tape at 23.98/ 24.0 as a result of this.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

[Robin Probyn]

Is that the same for Varicam and HDCAM,I thought the varicam is at a constant speed,and flag framed?

Thanks

[Gary Adcock]

[Redflag] “Is that the same for Varicam and HDCAM,I thought the varicam is at a constant speed,and flag framed?”

This is a Sony only way to handle the 24p. (thought that was what I said), 720p24 is always recorded in a 60fps video stream when recording to tape.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

[Robin Probyn]

Sorry to be thick,but if the varicam is constant 60p,then how is the 29.98 NDF time code the same as the running time?

Thanks for your time again

[Gary Adcock]

I do not understand the question.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

[Paul Thurston]

Hi Redflag,

Non Drop Frame time code is theoretically never equal to real TIME. Therefore, if you are shooting at 23.976 or 29.970 frames per second, your time code will not match real time.

BUT

If you shoot at exactly 24, 25, 30, 50 or 60 frames per second, your Non Drop Frame time code WILL actually match real time.

So if you where shooting with a VariCam, and say you set it up to shoot at 25 fps, the flagged time code (the time code associated with the flagged frames) will actually match real time, upon playback.

If you shoot at 23.976 fps on your VariCam, event though it’s actually recording at 60 fps, the time code associated with the flagged frames will NOT match real time, upon playback.

Put it this way: if you are shooting in whole number frames rates, the time code will actually match real time. (There is no need for DF time code in whole number frame rates.)

If you are shooting in frame rates that have a decimal attached to them, the time code will NOT match real time in Non Drop Frame.

-Paul Thurston