25f to 29.97 or face the phasing issues? at DVinfo.net

Go Back   DV Info Net > Windows / PC Post Production Solutions > Non-Linear Editing on the PC

Non-Linear Editing on the PC
Discussing the editing of all formats with Matrox, Pinnacle and more.

Thread Tools Search this Thread
Old April 2nd, 2009, 02:52 PM   #1
Regular Crew
Join Date: Oct 2008
Location: Denver, CO
Posts: 78
25f to 29.97 or face the phasing issues?

Hey Everybody,

I'm looking for some advice. I recently hired a fellow videographer in the UK. He produced some great footage for me of one of our project sites out there. The main reason I decided to use his services was because he had an EX1 with the capabilities to shoot in NTSC. That way we wouldn't have any crazy conversion issues going from PAL back to NTSC for me to edit with.

Sure enough the footage imports perfectly, except one draw back. Because of the different power frequencies between the UK and the US, we now have a flicker or phasing happening in the image whenever he had to shoot inside (basically whenever unnatural lighting occurs).

Does anyone know of a technique I can use to reduce or eliminate this from the footage he gave me?

Also, would it be a better option to just have him shoot 25f rather than 30f? What's a good technique to translate that footage back to NTSC?

Thanks in advance for any help on this :)
Website: http://rougheditproductions.com/
Vimeo Profile: http://vimeo.com/roughedit
Emrys Roberts is offline   Reply With Quote
Old April 2nd, 2009, 09:50 PM   #2
Major Player
Join Date: Jun 2007
Location: Hamilton Ontario
Posts: 769
So, you're using an NTSC camera, with an adapter for frequency conversion correct?
The flicker you mention is quite puzzling....
Could it be perhaps that the shutter speed wasn't set to avoid light frequencies?? Sort of like the "Clear Scan" option on my XH A1?
If that's the case, you're going to have to do some serious post work...
I'm surprised the operator didn't catch that on monitor....

Can't help you there, sorry.
Personally, i've always been a fan of slowing down Progressive 25FPS footage to 23.976FPS...
Since my final delivery was usually DVD, i would simply run a simple program called Pulldown.exe, to my video stream, and it would add the flags for proper playback on DVD's...
You just need to slow the audio by 95.904 percent, and voila....

I used to get kicks out of converting beautifully made DVD's from Europe (filmed progressively of course), and converting them over for proper playback in NTSC land..The transfers were stunning...
Peter Manojlovic is offline   Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

Omega Broadcast
(512) 251-7778
Austin, TX

(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

(800) 238-8480
Glendale, CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Windows / PC Post Production Solutions > Non-Linear Editing on the PC

Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -6. The time now is 04:32 PM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2015 The Digital Video Information Network