24 to 25p, David, I need your help please at DVinfo.net

Johnnie Behiri · January 25th, 2010, 04:16 PM

Hi David.
When converting 24p to 25p with HD link, is there a way to avoid the change in video length and keep 1 second of video in 24p as 1 second in 25p letting the audio ONLY to change its pitch?

Much appreciated!

Johnnie

David Newman · January 25th, 2010, 04:30 PM

If you where to frame interpolate 24 to 25, why would you need to change the audio pitch, as 1.0 seconds would still be 1.0 seconds. The problem is 24p to 25p motion interpolation looks so bad no one does it. All 24p movies (Hollywood stuff) are played 4% faster in 25Hz countries Europe and Australia, etc (for TV playback.) No one notices, even though your movie is over 4 minutes earlier, think of the productivity gains.

January 25th, 2010, 04:16 PM	#1
Johnnie Behiri Regular Crew Join Date: Apr 2003 Location: Vienna/Austria Posts: 187	24 to 25p, David, I need your help please Hi David. When converting 24p to 25p with HD link, is there a way to avoid the change in video length and keep 1 second of video in 24p as 1 second in 25p letting the audio ONLY to change its pitch? Much appreciated! Johnnie __________________ http://www.johnniebehiri.com/

January 25th, 2010, 04:30 PM	#2
David Newman CTO, CineForm Inc. Join Date: Jul 2003 Location: Cardiff-by-the-Sea, California Posts: 8,095	If you where to frame interpolate 24 to 25, why would you need to change the audio pitch, as 1.0 seconds would still be 1.0 seconds. The problem is 24p to 25p motion interpolation looks so bad no one does it. All 24p movies (Hollywood stuff) are played 4% faster in 25Hz countries Europe and Australia, etc (for TV playback.) No one notices, even though your movie is over 4 minutes earlier, think of the productivity gains. __________________ David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman