Thursday, March 23, 2023

Re: [Avid-L2] 23.976fps to 25fps

Ehh - wait, forgot, there's no 25 in Interop. But unless there's a specific requirement for Interop DCP, I almost always author SMPTE. 

On Thu, Mar 23, 2023 at 9:45 AM Mark Spano via groups.io <cutandcover=gmail.com@groups.io> wrote:
Hi Jef,

I'm curious - for what reason would you have needed to convert 25 to 24 for a DCP? 25 fps is in both the Interop and SMPTE DCP specs. I help run a screening room here in NY and we get both 24 and 25 fps DCPs all the time and project them without issue.

On Thu, Mar 23, 2023 at 9:39 AM Jef Huey <jlhueyc2@gmail.com> wrote:

[Edited Message Follows]

I recently completed a 25fps feature doc about a dancer.  Lots of music, dialog, city sounds, etc.  We had to make a 24fps conversion for a DCP.  Very limited budget did not allow the preferred path of working from stems and pitching them.  We also knew that none of the tools to keep the original speed by manipulating the video would be acceptable with all the dance scenes.  So it had to be a slowdown.

We used the onboard pitch correction tool in Alchemist (the software version) to handle the job.  We then let the director (a dancer herself) compare the audio with no pitch fix and the Alchemist's pitch correction of the full 5.1 mix.  First, she was shocked by how much lower sounding the no pitch fix version sounded.  And she was satisfied with the pitch fixed version.  She has had several screenings in large well maintained theaters and says it sounds great.

So I guess I am saying that it is possible to process a full, complicated mix.  But you must listen to the result prior to committing to it's use.  And it helps to work with a post house with options on it tools and a helpful attitude.  EDIT:  It also may be the case that a slowdown works better than the inverse.

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