25p to 23.98fps conversion at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > All Things Audio

All Things Audio
Everything Audio, from acquisition to postproduction.


Reply
 
Thread Tools Search this Thread
Old October 3rd, 2009, 12:12 PM   #1
Regular Crew
 
Join Date: Sep 2005
Posts: 152
25p to 23.98fps conversion

Hi

Im editing in FCP at 1280x720 25p and need to now output my project as an NTSC DVD.

The best method I have found is using cinema tools to conform to 23.98 (then burn a NTSC DVD at 23.98p). However, when I do this the audio is out of sync. I cannot for the life of me work out why.

Also, if I try and time stretch the audio in Soundtrack Pro, it doesnt work. It should be 4.08% difference but the audio still becomes progressively out of sync. So mathematically, it must progress from 4.08%

I tried just doing the conversion in compressor but my graphics were jerky and not smooth.

Out of time and back against the wall on this project. Would appreciate any help / suggestions.

Thanks

Trevor
Trevor Allin is offline   Reply With Quote
Old October 3rd, 2009, 12:51 PM   #2
Trustee
 
Join Date: Aug 2008
Location: New York
Posts: 1,842
videotoolshed.com makes a lot of conversion utilities for FCP. Don't know if they make a utility for your specific issue though.
Rick Reineke is offline   Reply With Quote
Old October 4th, 2009, 03:26 AM   #3
Trustee
 
Join Date: Apr 2008
Location: Cornsay Durham UK
Posts: 1,940
These may be helpful:Nattress: Standards Conversion: Standards Converter V2.5
__________________
Over 15 minutes in Broadcast Film and TV production: http://www.imdb.com/name/nm1044352/
Gary Nattrass is offline   Reply With Quote
Old October 4th, 2009, 03:44 AM   #4
Regular Crew
 
Join Date: Apr 2008
Location: Echuca, Victoria, Australiamate
Posts: 179
Since when is the NTSC frame rate 23.98fps.... Has the standard been changed from 29.97?

Ben
Ben Longden is offline   Reply With Quote
Old October 4th, 2009, 05:16 AM   #5
Inner Circle
 
Join Date: Mar 2005
Location: Hamilton, Ontario, Canada
Posts: 5,742
As Ben says ... NTSC video is ALWAYS 29.97 FPS.
__________________
Good news, Cousins! This week's chocolate ration is 15 grams!
Steve House is offline   Reply With Quote
Old October 4th, 2009, 08:09 AM   #6
Trustee
 
Join Date: Nov 2005
Location: Sydney Australia
Posts: 1,570
If you've shot 25p then one retimes it to 23.976 and adds pulldown to give 60i AKA NTSC.
Bob Grant is offline   Reply With Quote
Old October 4th, 2009, 06:52 PM   #7
Regular Crew
 
Join Date: Apr 2008
Location: Echuca, Victoria, Australiamate
Posts: 179
Quote:
Originally Posted by Bob Grant View Post
If you've shot 25p then one retimes it to 23.976 and adds pulldown to give 60i AKA NTSC.
Why?

That opens you up to all sorts of issues, like Trevor has.
Why not stick to a common broadcast standard, then save yourself headaches and nightmares?

Besides, because its 60 frames a sec, interlaced does not mean it is NTSC...

Thats a bit like shooting a PAL project, then converting it to NTSC 720 wide, then converting to 480 wide, then uprezzing to BluRay at 1080i, then back to PAL 720... You are frought with danger and will result in a lousy image with poor audio and synch problems at the end of the day.

Stick with the broadcast standard, and you wont have a headache.

2.2 c worth, including tax

Ben
Ben Longden is offline   Reply With Quote
Old October 4th, 2009, 07:14 PM   #8
Major Player
 
Join Date: Dec 2007
Location: Sacramento, CA
Posts: 904
value added tax, right mate ? <g>
Chris Swanberg is offline   Reply With Quote
Old October 4th, 2009, 07:19 PM   #9
Regular Crew
 
Join Date: Apr 2008
Location: Echuca, Victoria, Australiamate
Posts: 179
YEP!

Down here its called GST.
Goods and Services Tax...

Payable on bloody everything.... :(


Ben
Ben Longden is offline   Reply
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

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. 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 > The Tools of DV and HD Production > All Things Audio

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 12:57 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network