24pn at DVinfo.net

Dante Waters · October 29th, 2007, 09:34 AM

I have a minidv taped that I captured using the DVX100b
in 24pn mode can I dump this tape using my sony Vx2100 to get the 24p look that I want?

Glenn Chan · October 29th, 2007, 09:38 AM

Yes... 24p footage usually has pulldown added to it (either normal 3:2 pulldown or advanced pulldown)... this lets you dump the footage onto miniDV (and other 60i formats).

Dante Waters · October 29th, 2007, 09:40 AM

OHHHH so by choosing 24p advanced It does the pull down right away... So I don't need the camera?

Glenn Chan · October 29th, 2007, 10:59 AM

1- There are two different forms of pulldown.

Normal pulldown. The cadence is referred to as 3:2 (or 2:3).

Advanced pulldown. The cadence is referred to as 2:3:3:2. Not all applications can remove this form of pulldown (particularly with high-end systems)!!! There is a small technical advantage in quality (compared to normal pulldown) if you need to remove pulldown / get at true 24p images because of the way DV compression works.

2- The 24p signal is converted to a 60i signal (via pulldown, either form) and is recorded onto the tape in that form. Equipment can handle 60i signals, and will play back the 60i signal fine.

Your DVX will also record pulldown flags onto the footage, and these flags are carried over firewire (but not SDI). I believe other cameras won't strip out those flags. You need these flags for your NLE to automatically detect the pulldown cadence so that it can remove it. Otherwise you can manually remove (normal) pulldown... you need to guess what the cadence is and check by eye. That's not that hard.

But remember some applications cannot remove advanced pulldown. So if you go to a professional online editing facility, their system may or may not be able to deal with advanced pulldown. Talk to them beforehand.

2b- You don't need to remove pulldown / convert footage back to 24p. You can edit the footage as if it were normal 60i material.

October 29th, 2007, 09:34 AM	#1
Dante Waters Major Player Join Date: Feb 2005 Location: NY, NY Posts: 217	24pn I have a minidv taped that I captured using the DVX100b in 24pn mode can I dump this tape using my sony Vx2100 to get the 24p look that I want?

October 29th, 2007, 09:38 AM	#2
Glenn Chan Inner Circle Join Date: Jun 2003 Location: Toronto, Canada Posts: 4,750	Yes... 24p footage usually has pulldown added to it (either normal 3:2 pulldown or advanced pulldown)... this lets you dump the footage onto miniDV (and other 60i formats).

October 29th, 2007, 09:40 AM	#3
Dante Waters Major Player Join Date: Feb 2005 Location: NY, NY Posts: 217	OHHHH so by choosing 24p advanced It does the pull down right away... So I don't need the camera?

October 29th, 2007, 10:59 AM	#4
Glenn Chan Inner Circle Join Date: Jun 2003 Location: Toronto, Canada Posts: 4,750	1- There are two different forms of pulldown. Normal pulldown. The cadence is referred to as 3:2 (or 2:3). Advanced pulldown. The cadence is referred to as 2:3:3:2. Not all applications can remove this form of pulldown (particularly with high-end systems)!!! There is a small technical advantage in quality (compared to normal pulldown) if you need to remove pulldown / get at true 24p images because of the way DV compression works. 2- The 24p signal is converted to a 60i signal (via pulldown, either form) and is recorded onto the tape in that form. Equipment can handle 60i signals, and will play back the 60i signal fine. Your DVX will also record pulldown flags onto the footage, and these flags are carried over firewire (but not SDI). I believe other cameras won't strip out those flags. You need these flags for your NLE to automatically detect the pulldown cadence so that it can remove it. Otherwise you can manually remove (normal) pulldown... you need to guess what the cadence is and check by eye. That's not that hard. But remember some applications cannot remove advanced pulldown. So if you go to a professional online editing facility, their system may or may not be able to deal with advanced pulldown. Talk to them beforehand. 2b- You don't need to remove pulldown / convert footage back to 24p. You can edit the footage as if it were normal 60i material.