Bringing 60p footage back to 24p at DVinfo.net

Daniel Cegla · January 13th, 2007, 12:50 PM

I don't mean slowing it down to playback at 24p; I mean cutting frames out so it is standard 24 frame shot again.

Is there a way to do this? If you capture something at 60p but decide you don't want the slow-motion effect to it, is there an easy way to make it play normal 100% 24fps?

Sam Jankis · January 15th, 2007, 01:26 AM

Yes. Speed it up in post 250%.

Daniel Cegla · January 20th, 2007, 04:36 AM

Ah, easy solution.

So would you say then that any shot that I think I may want to have in slow motion, even if I am not sure, should be shot in 60p? And then if I decide no slow-mo, just speed it up 250% and then back to normal speed? Or does this cost any loss of quality or weird, unwanted effects? Would it be best to shoot two versions of the shot, one 24p and one 60p? Or is that just reduntant and unneccessary?

Robert Lane · January 20th, 2007, 10:14 AM

Daniel,

Yes, there will be a distinct difference between footage shot in normal speed 24fps and over-cranked footage that's been ramped-up to normal speed in post - motion blur.

In normal 24fps you get noticeable motion blur, just as film does at that speed. When you overcrank to get slow motion the motion blur is *almost* non-existent (depending on the motion of the target subject), so if you then speed up that slow-motion footage you'll be devoid of the normal 24fps motion blur - and it will look more like it was shot in 30 or 60p.

Depending on your project look and feel this may or may not be an issue, but if you need to keep a motion-artifact match throughout a scene then you should plan on keeping things at the same frame rate.

January 13th, 2007, 12:50 PM	#1
Daniel Cegla Regular Crew Join Date: Apr 2006 Location: N/A Posts: 57	Bringing 60p footage back to 24p I don't mean slowing it down to playback at 24p; I mean cutting frames out so it is standard 24 frame shot again. Is there a way to do this? If you capture something at 60p but decide you don't want the slow-motion effect to it, is there an easy way to make it play normal 100% 24fps?

January 15th, 2007, 01:26 AM	#2
Sam Jankis Major Player Join Date: Jun 2006 Location: St. Pete, FL Posts: 223	Yes. Speed it up in post 250%.

January 20th, 2007, 04:36 AM	#3
Daniel Cegla Regular Crew Join Date: Apr 2006 Location: N/A Posts: 57	Ah, easy solution. So would you say then that any shot that I think I may want to have in slow motion, even if I am not sure, should be shot in 60p? And then if I decide no slow-mo, just speed it up 250% and then back to normal speed? Or does this cost any loss of quality or weird, unwanted effects? Would it be best to shoot two versions of the shot, one 24p and one 60p? Or is that just reduntant and unneccessary?

January 20th, 2007, 10:14 AM	#4
Robert Lane Go Go Godzilla Join Date: Nov 2004 Location: Scottsdale, AZ USA Posts: 2,823 Images: 15	Daniel, Yes, there will be a distinct difference between footage shot in normal speed 24fps and over-cranked footage that's been ramped-up to normal speed in post - motion blur. In normal 24fps you get noticeable motion blur, just as film does at that speed. When you overcrank to get slow motion the motion blur is almost non-existent (depending on the motion of the target subject), so if you then speed up that slow-motion footage you'll be devoid of the normal 24fps motion blur - and it will look more like it was shot in 30 or 60p. Depending on your project look and feel this may or may not be an issue, but if you need to keep a motion-artifact match throughout a scene then you should plan on keeping things at the same frame rate.