Workprinter files back to normal speed?

[Kurt]

Hello!

What is the correct way to get the files captured by the workprinter 2 back up to their normal speed? How are you doing it?Hello Roger!

I've been e-mailing with Jeff about getting my transfer files up to their normal speed. We are both a bit confused, but maybe we're just making it hard for ourselves. Again, my footage was shot at 18 fps and I transferred to PAL video using DODCAP with no pulldown. I found one of Roger's e-mails from a while ago where he stated that I should pull the file into the Premiere timeline and make a 76% speed adjustment. I did this and it seemed to look fine. I noticed when I advanced down the timeline that some frames were doubled during this speed adjustment. This might be a stupid question, but is that normal? I was under the impression that I would have the exact same number of frames, also after the speed adjustment. Do I? Also, is the pulldown that Jeff's program can do the same as the speed adjustment that is done in Premiere? It sure does look the same. Jeff is under the impression that doing the pulldown first and then editing the footage in Premiere will make the scenes look jerky during playback on the TV. But, I can't edit the footage correctly until it plays at its normal speed - it's a music video and I'll be editing to the beat of the song. Wondering what to do?

Thanks in advance!

Kurt

[sigr]

Yes, you will get doubled up frames. Think of it this way: when you shot the film you captured frames at 18 frames per second. When you want to play it back in PAL video after the transfer you need 25 frames per second. Where do you take the extra 7 frames from? Yes, exactly from some of the 18 you already have. There is nowhere else you could get them from anyway. According to my calculations, the speed adjustment should be 18/25 x 100 =72%. Similarly, for NTSC I'm using 60% speed adjustment (18/30 x 100 =60%).

Hope that clarifies the situation.

Regards,
sigr

[digvid]

Kurt -

I can tell you that the speed adjustment in Dodcap and Premiere will give you essentially the same result as long as you have the interpolate checkbox turned off in Dodcap. When this checkbox is off, pulldown is performed by doubling some frames (just as Premiere does). However, when the checkbox is on, Dodcap does pulldown by adding extra frames that are hybrids of two adjacent frames. Also, the speed change in Premiere more or less permanently adds these extra padding frames--you do not keep your original number of frames.

I am not an expert in Premiere, but there may be a way to set the working frame rate to 18 fps and perform your edits that way. If possible, this would in effect slow down your footage to the correct speed without adding any frames. Does anyone know whether Premiere can do this? I know that you can in Adobe After Effects.


The interpolated pulldown you would definitely not want to do before editing. However, you might try a test where you apply pulldown (either in Dodcap or Premiere) without the interpolation, do some edits, then play out to your tv to see if it looks good. If it does, then you can proceed to add your music.

- Jeff Dodson

[Kurt]

Thanks for the replies. I think I have finally understood what happens during the pulldown. Duh! Actually, Roger just answered an e-mail I sent him and said I shouldn't be afraid to try the interpolated pulldown even when editing the files. I think I'll just have to give both ways a try and DODCAP will allow me to do that without losing my original transfer without the pulldown.

Thanks again!

Kurt