24p to 23.98 conversion

[Jeremy Garchow]

[Joel Fisher] “is the video being slowed down ever so slightly to 23.98, affecting the pitch of the audio and everything?”

Exactly. And sorry, i guess I stand corrected. Didn’t know AVCHD camera could shoot 24.0 (unless this was from a PAL based camera).

[Joel Fisher] ” If so, is this the only and best workaround for footage that was shot improperly? “

You could use Compressor, but the Cinema Tools route requires no processing.

[Joel Fisher]

Ah, so we could process this through Compressor.

Would it be as simple as creating a ProRes droplet that was specifically 1080psf 23.98, as opposed to “Settings based off of source resolution and frame-rate.” We want to help make it as clear, easy and dummy-proof as possible for them and for us. If we create a droplet, they won’t have to do more than set their system up to render, choose target directories and enjoy a nice long coffee break.

So, just create a 23.98 ProRes droplet, and Compressor will handle the conform properly?

Once again, thanks a million, everyone.

[Jeremy Garchow]

you want to set the frame rate to 23.976 in Compressor, not 23.98.

Then in the frame controls set everything to best.

[Joel Fisher]

Wonderful! We’ll give it a whirl.

[Tom Brooks]

Apple seems to be the only publisher confirming the 23.98 frame rate. This from FCP 7 help files online:

https://documentation.apple.com/en/finalcutpro/professionalformatsandworkflows/index.html#chapter=6%26section=3%26tasks=true

[Rafael Amador]

[Joel Fisher] ” is the video being slowed down ever so slightly to 23.98, affecting the pitch of the audio and everything?”
No problem at all here.
When you conform 25fps footage to 24/23’98, you have a 4% speed change, what can really be an issue with the audio.
In this case (24 to 23’98), the speed difference is some 0’04%.
Not even Superman would be able to notice.
However, as long as you have to transcode all that footage, Jeremy’s suggestion is the best option.
rafael

http://www.nagavideo.com

[Matt Lyon]

I totally agree … CONFORMING the frame rate is the way to go.

If you do this through compressor you also have to set the “retiming control” to “so source frames play at 23.98” (actually 23.976, as we all know).

If you leave the setting at “set duration to: 100.000% of source,” Compressor will create interpolated frames, which would likely create motion artifacts.

Matt Lyon
Editor
Toronto