Slow motion in 24pA for film transfer? at DVinfo.net

Jaime Valles · January 23rd, 2003, 01:54 PM

Hello, all. I'm wondering if anyone knows if it is possible to convert MiniDV footage (shot on a Panny DVX100 @ 24pA) into slow motion, using Final Cut Pro, for eventual transfer to film?

I've read in Marcus Van Bavel's book "Shooting Digital" that to do slow motion in NTSC for film transfer it can only be done at 40% of normal speed for the frames to line up right. Does anyone know what speed is necessary if it's shot in 24pA and not in 60i?

Thanks in advance!

Rene Legaspi · January 23rd, 2003, 06:49 PM

have you tired Twixtor?

http://www.revisionfx.com/rstwixtor.htm

Marcus van Bavel · January 23rd, 2003, 07:43 PM

The comment in the book only applies to "normal" interlaced NTSC.

For something shot 24PA I hope you're editing at 24P. Are you? If so then any slow-motion method you use, like a simple 2:1 frame repeat (i.e. 50% normal speed), will look the same on film as it does on your computer.

If you're not editing at 24, then you'll have to remove the pulldown, apply the slow-motion in a 24P timeline, then re-apply the pulldown. Removing and reapplying the 2:3:3:2 pulldown can be done with DVFilm Maker, http://www.dvfilm.com/maker/dvx100.htm

Jaime Valles · January 23rd, 2003, 08:29 PM

Yes, I will be editing in 24pA, most likely using DVFilm Maker.

Thanks a bunch!

John Beighle · January 24th, 2003, 12:48 AM

hey jamie,

first of all what do you plan to shoot in slow motion? i mean is it a stationary shot, a pan, tilt, zoom, or even a moving camera one?
i ask this because i heard alot about the motion blur/artifacts that can occur with this camera or any video camera for that matter.
you could always try shoot it in film; like super-8mm or 16mm and then transfer it to video later.

john,

Clayton Farr · January 24th, 2003, 08:22 AM

There is also the 'built-in' slow motion:

shoot at 30p fps and force back to 24 fps, resulting in a 20% slow-down with 'real' frames.

HTH,
Clayton

Jaime Valles · January 24th, 2003, 09:39 AM

Well, I probably won't be shooting in actual film (as I have no idea how to use a film camera), but it is a good suggestion.

The shots I have in mind have very little camera movement; only the subject being filmed is moving somewhat fast (he's throwing a baseball), which I'd like to be in slow motion.

As far as shooting 30p and then converting to 24p, that is very interesting. I'll probably try shooting it in various camera settings to decide later on which looks better in slo-mo.

Thanks for the suggestions!

Rene Legaspi · February 10th, 2003, 03:41 AM

Just HOW, if someone can explain to me, does anyone go about shooting in 60i or 30p then change it to 24p? How? Is it in camera or in post? I didn't know it's built it. I would totally use it if I only knew.
Thanks!

Frank Granovski · February 10th, 2003, 04:08 AM

You can't get good slow motion results because you'll need to bump up the frames per second when shooting, like at 60fps. 60fps is basically the standard slow motion frame rate. You can do this with film and HD, but not with miniDV.

January 23rd, 2003, 01:54 PM	#1
Jaime Valles Major Player Join Date: Aug 2002 Location: New York City, NY Posts: 316	Slow motion in 24pA for film transfer? Hello, all. I'm wondering if anyone knows if it is possible to convert MiniDV footage (shot on a Panny DVX100 @ 24pA) into slow motion, using Final Cut Pro, for eventual transfer to film? I've read in Marcus Van Bavel's book "Shooting Digital" that to do slow motion in NTSC for film transfer it can only be done at 40% of normal speed for the frames to line up right. Does anyone know what speed is necessary if it's shot in 24pA and not in 60i? Thanks in advance!

January 23rd, 2003, 07:43 PM	#3
Marcus van Bavel Contributor Join Date: Sep 2002 Location: Austin TX Posts: 176	Re: Slow motion in 24pA for film transfer? The comment in the book only applies to "normal" interlaced NTSC. For something shot 24PA I hope you're editing at 24P. Are you? If so then any slow-motion method you use, like a simple 2:1 frame repeat (i.e. 50% normal speed), will look the same on film as it does on your computer. If you're not editing at 24, then you'll have to remove the pulldown, apply the slow-motion in a 24P timeline, then re-apply the pulldown. Removing and reapplying the 2:3:3:2 pulldown can be done with DVFilm Maker, http://www.dvfilm.com/maker/dvx100.htm

January 23rd, 2003, 06:49 PM	#2
Rene Legaspi New Boot Join Date: Jan 2003 Location: Seattle, WA Posts: 17	have you tired Twixtor? http://www.revisionfx.com/rstwixtor.htm

January 23rd, 2003, 08:29 PM	#4
Jaime Valles Major Player Join Date: Aug 2002 Location: New York City, NY Posts: 316	Yes, I will be editing in 24pA, most likely using DVFilm Maker. Thanks a bunch!

January 24th, 2003, 12:48 AM	#5
John Beighle New Boot Join Date: Jan 2003 Posts: 9	hey jamie, first of all what do you plan to shoot in slow motion? i mean is it a stationary shot, a pan, tilt, zoom, or even a moving camera one? i ask this because i heard alot about the motion blur/artifacts that can occur with this camera or any video camera for that matter. you could always try shoot it in film; like super-8mm or 16mm and then transfer it to video later. john,

January 24th, 2003, 08:22 AM	#6
Clayton Farr Contributor Join Date: Aug 2002 Location: Salt Lake City, UT Posts: 94	There is also the 'built-in' slow motion: shoot at 30p fps and force back to 24 fps, resulting in a 20% slow-down with 'real' frames. HTH, Clayton

January 24th, 2003, 09:39 AM	#7
Jaime Valles Major Player Join Date: Aug 2002 Location: New York City, NY Posts: 316	Well, I probably won't be shooting in actual film (as I have no idea how to use a film camera), but it is a good suggestion. The shots I have in mind have very little camera movement; only the subject being filmed is moving somewhat fast (he's throwing a baseball), which I'd like to be in slow motion. As far as shooting 30p and then converting to 24p, that is very interesting. I'll probably try shooting it in various camera settings to decide later on which looks better in slo-mo. Thanks for the suggestions!

February 10th, 2003, 03:41 AM	#8
Rene Legaspi New Boot Join Date: Jan 2003 Location: Seattle, WA Posts: 17	Just HOW, if someone can explain to me, does anyone go about shooting in 60i or 30p then change it to 24p? How? Is it in camera or in post? I didn't know it's built it. I would totally use it if I only knew. Thanks!

February 10th, 2003, 04:08 AM	#9
Frank Granovski Outer Circle Join Date: May 2002 Location: Hope, BC Posts: 7,524	You can't get good slow motion results because you'll need to bump up the frames per second when shooting, like at 60fps. 60fps is basically the standard slow motion frame rate. You can do this with film and HD, but not with miniDV.