DCP

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rodiazperez

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DCP

PostSat Apr 26, 2025 12:45 am

Hi! I have a technical workflow question. I have to deliver a DCP and

I have a 5.1 mix at 24 FPS and a 23.976 MOVIE

After several tries, I end up with:

A 23.976 FPS TIMELINE
MOVIE SPEED AT 100.10 (FRAMES PER SECOND 24)
5.1 24 FPS MIX

I made an export in .mov and for my surprise it looks ok.
Made an export of a minute to DCP and check with OMATIC and... looks fine.

Does anyone have a suggestion about a better workflow???
Any information is welcome.

Thanks in advance.
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Andrew Kolakowski

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Re: DCP

PostSat Apr 26, 2025 9:57 am

You don't want to convert video between different fps, but rather change audio speed.
What you've have done can either introduce artefact in video or make it jerky.
You need 24p timeline and then before you import your 23.976p clip you need to change its fps in the Clip attributes options to 24p. This way you preserve original frames, just play them a bit faster. Then you have to adjust audio, to match video length. You can do it in Resolve or outside.

Not sure what Resolve offers, but there are tools design specifically for audio speed change. There are different algorithms, so you can get different results, but one thing is quite important here. In case of multichannel audio all channels need to be processed simultaneously in order to keep phase lock. Good tools do it this way. No idea about Resolve, but there is/use to be tool called TimeFactory II which was good.

24 to 23.976 is such a small change that I would definitely not use pitch correction, so then it's rather easy conversion, but maybe some audio engineer can help more.

Audio is for 24p, so can be used as is.
Last edited by Andrew Kolakowski on Sat Apr 26, 2025 6:37 pm, edited 1 time in total.
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waltervolpatto

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Re: DCP

PostSat Apr 26, 2025 4:35 pm

make a timeline at 23.98
add the appropriate audio at 23.98
tell resolve to make a DCP at 24 (standard)
export.

done. (resolve stretch teh audio to fit)

dont overthink it.
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Andrew Kolakowski

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Re: DCP

PostSat Apr 26, 2025 6:32 pm

He doesn't have audio for 23.976p, only for 24p.
Actually not sure I written about the audio, as you use it as is.
You only change speed for the video to run at 24p.
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rodiazperez

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Re: DCP

PostMon Apr 28, 2025 5:27 pm

Andrew Kolakowski wrote:You don't want to convert video between different fps, but rather change audio speed.
What you've have done can either introduce artefact in video or make it jerky.
You need 24p timeline and then before you import your 23.976p clip you need to change its fps in the Clip attributes options to 24p. This way you preserve original frames, just play them a bit faster. Then you have to adjust audio, to match video length. You can do it in Resolve or outside.

Not sure what Resolve offers, but there are tools design specifically for audio speed change. There are different algorithms, so you can get different results, but one thing is quite important here. In case of multichannel audio all channels need to be processed simultaneously in order to keep phase lock. Good tools do it this way. No idea about Resolve, but there is/use to be tool called TimeFactory II which was good.

24 to 23.976 is such a small change that I would definitely not use pitch correction, so then it's rather easy conversion, but maybe some audio engineer can help more.

Audio is for 24p, so can be used as is.


You know, I´d tried change the atributes AFTER and clip went offline. I did it now just like you said, and works. I'm still not sure why changing the atributes before it´s different to the speed process inside the timeline, in technical terms, but, I´ll dig on it.

Thank you both, I´m very grateful.
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Andrew Kolakowski

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Re: DCP

PostMon Apr 28, 2025 5:30 pm

I don't know what exactly is speed change doing once clip is on the timeline.
I know what clip attributes fps change does and this is 100% correct and valid method for your case :)

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