HD 25fps – 29.97fps frame rate best conversion

[Chris Borjis]

BETTER (motion compensated)
with the setting below it set for 100% of original

Best will take a lifetime and not look any different.

[Sean Oneil]

Have you considered just conforming it to 23.98 in Cinema Tools?

Sean

[Peter Lee-jones]

Why would I want to go to 23.98?

My delivery format is 29.97

FCP since 2003 — G5 w/ Blackmagic Decklink HD

[Gary Adcock]

[PETER LEE-JONES] “Why would I want to go to 23.98?
My delivery format is 29.97 “

Because that is the standard method for converting between the NTSC and PAL frame rates.

by conforming the the clip in CT to 23.98, and then adding pulldown to get your output to 29.97- you can achieve the conversion. It will not be as accurate as going through a teranex, but it does work.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
Inside look at the IoHD

[Peter Lee-jones]

interesting I will try that

FCP since 2003 — G5 w/ Blackmagic Decklink HD

[Matthew Nelson]

There is a caveat to the 25 to 23.98 conform process. Your TRT will grow by 4% and your audio with shift in pitch.

A quick way to pitch correct the audio is to conform the video, note the new TRT. Take the 25fps audio into soundtrack and use the time stretch process. Enter in the new TRT, render and output.

Matt

[Peter Lee-jones]

We found a good way to do this.

Playout the program as 25p

then convert the SRW5500 to 29.97

then digitise into FCP 29.97 and time stretch the picture at 83.33%
Our films are only

the reason for this is we have Dolby surround sound which must not be corrupted.

Then master onto SRW5500

FCP since 2003 — G5 w/ Blackmagic Decklink HD

[Gary Adcock]

[Peter Lee-Jones] “the reason for this is we have Dolby surround sound which must not be corrupted. “

I am going to bet FCP tears it up….

just a guess

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
Inside look at the IoHD

[Matthew Nelson]

I believe that the 5500 can playout 25 as 23.98 and pitch correct the audio at the same time. But what that would do to your audio encode I do not know.

If you found something that works go with it.

Matt

[Brendan Pyatt]

Hi,

I am having problems converting some footage from 25 to 29.97.

“and then adding pulldown to get your output to 29.97” – Can you explain this a bit more? How do I add a pulldown? Does compressor do this or is there something else I should be doing?

Thanks!