Premiere Timeline in regards to frames at DVinfo.net

Dan Burnap · May 22nd, 2007, 03:51 AM

I apologise in advance if this is not the correct place for this post but here goes.

As I am using PAL I'll use a PAL example but it applies to all systems. Let's say you open a standard PAL project in Premiere, you have 25fps. If your footage was shot at 25fps then for each frame on the timeline, you have one frame from your footage, all well and good. However, if you are shooting 50fps what will then constitute one frame on the timelime? as your timeline has 25 frames yet the footage has twice as many...?

Thanks

Mark Morikawa · May 22nd, 2007, 06:10 PM

you literally counted 25 frames per second on the premiere timeline when shot at 50fps??

Colin Pearce · May 22nd, 2007, 08:35 PM

Wow! What camera do you have that can record at 50fps? That's 100 interlaced fields per second!

Perhaps I don't understand.

Dan Burnap · May 23rd, 2007, 02:45 AM

Ooooops!, actually I meant shutter speed...

Colin Pearce · May 23rd, 2007, 06:14 AM

OK. Well in that case the number of frames per second is identical, no matter what the shutter speed. Think of the shutter speed as being the length of time the shutter is exposing the "film". For example, a shutter speed of 1/500th second will still only record 25 frames per second. Each frame is exposed for 1/500th of a second. The shutter then waits until the next 1/25th of a second has been reached before exposing the next frame.

Dan Burnap · May 23rd, 2007, 10:34 AM

Now it makes sense, thanks Colin

May 22nd, 2007, 03:51 AM	#1
Dan Burnap Major Player Join Date: Oct 2005 Location: Rio de Janeiro Posts: 335	Premiere Timeline in regards to frames I apologise in advance if this is not the correct place for this post but here goes. As I am using PAL I'll use a PAL example but it applies to all systems. Let's say you open a standard PAL project in Premiere, you have 25fps. If your footage was shot at 25fps then for each frame on the timeline, you have one frame from your footage, all well and good. However, if you are shooting 50fps what will then constitute one frame on the timelime? as your timeline has 25 frames yet the footage has twice as many...? Thanks

May 22nd, 2007, 06:10 PM	#2
Mark Morikawa Regular Crew Join Date: Jul 2006 Location: Aiea, HI Posts: 85	you literally counted 25 frames per second on the premiere timeline when shot at 50fps??

May 22nd, 2007, 08:35 PM	#3
Colin Pearce Regular Crew Join Date: Dec 2004 Location: Brisbane, Australia Posts: 99	Wow! What camera do you have that can record at 50fps? That's 100 interlaced fields per second! Perhaps I don't understand.

May 23rd, 2007, 02:45 AM	#4
Dan Burnap Major Player Join Date: Oct 2005 Location: Rio de Janeiro Posts: 335	Ooooops!, actually I meant shutter speed...

May 23rd, 2007, 06:14 AM	#5
Colin Pearce Regular Crew Join Date: Dec 2004 Location: Brisbane, Australia Posts: 99	OK. Well in that case the number of frames per second is identical, no matter what the shutter speed. Think of the shutter speed as being the length of time the shutter is exposing the "film". For example, a shutter speed of 1/500th second will still only record 25 frames per second. Each frame is exposed for 1/500th of a second. The shutter then waits until the next 1/25th of a second has been reached before exposing the next frame.

May 23rd, 2007, 10:34 AM	#6
Dan Burnap Major Player Join Date: Oct 2005 Location: Rio de Janeiro Posts: 335	Now it makes sense, thanks Colin