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David Bynum
Known Participant
August 24, 2020
Question

Correcting mixed cadence

  • August 24, 2020
  • 4 replies
  • 3284 views

I have my film at the aggregators , it keeps getting rejected because of mixed cadence 4:1 & 1:1.  I'm not sure where the problem occurred. Any suggestions on how to repair the problem?

This topic has been closed for replies.

4 replies

Participant
April 20, 2023

ha are you working with Good Deed? I just got the same thing from their QC.

Participating Frequently
April 21, 2023
No. I am working with Bitmax. I still haven't been able ro fix mine because I had to replace my video card. I just got it back. My day job is wicked busy, so hopefully this week coming, I will work on it.
Participant
April 21, 2023

Oh yeah bitmax is my distributors qc group. This is the first time I've heard of cadence outside of voice work 

David Bynum
Known Participant
March 1, 2023

The problem was the film was shot in two different fps rate. When editing make sure you set the frame rate to 29.97fps and edit the whole project in that rate. Unfortunately the only way to correct it is to rebuild the project on the proper timeline and fps rate. I tried every shortcut nothing worked. You have to redo on the proper timeline.

Participating Frequently
March 1, 2023
So, I start a new timeline with a setting of 29.97 fps and I think premiere ask me if I want to "keep current setting?




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David Bynum
Known Participant
March 1, 2023

Yes the whole project must be done on a 29.97 timeline. When you start the new project make sure it's set on 29.97 and stays that way until you export. If your already with a aggregator I'm assuming they want it Pro Res 422 export. If not export it how ever they request it. 

Mike Dziennik
Community Expert
Community Expert
September 11, 2020

As your footage is 23.98p and your delivery is 29.97i then you need to apply 3:2 pulldown. This has to be applied at the last stage so the cadence is consistent through the programme (if done correctly you can reverse the process, but only because it is consistent throughout). 

As mgrenadier suggested, you are probably best making a 23.98p timeline and using this as a master. You can then export at 29.97i and the cadence will be applied consistently. 3:2 pulldown is simply a matter of repeating fields so the quality should be the same regardless of which application is doing it (assuming it is a standard 3:2 pulldown: which Premiere will do...as opposed to some form of motion interpreted frame rate conversion...where different applications will have differing levels of quality.)

Again, as mgrenadier suggests, you can copy and paste your timeline, or you can simply change your existing sequence settings. Copy paste might be better because you can refer back to the original if anything goes wrong.

David Bynum
Known Participant
September 12, 2020

Thank you, we are going to try this next. I’ll follow back
Up and let you know how it works.
Sent from my iPhone
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[Moderator note: extraneous data removed.]

Mike Dziennik
Community Expert
Community Expert
August 24, 2020

What frame rate are your sources and what is your delivery frame rate? Are your sources interlaced/progressive and does it match your delivery specs? Im not exactly sure what you/they mean by 4:1 & 1:1. Need more info.

David Bynum
Known Participant
September 11, 2020

Ok sorry for the delay, I had to hear back from the aggregators. I'm still having the same problem. The film was shot at 23.976 progressive, it was edited in premiere pro. Exported in Pro Res 422,  29.97fps upper field first.

 Here is the email stating the problem;

The Delivery specs are:  

Apple Pro Res 422

29.97i

5.1 audio  

any help or suggestions are more than welcomed , I'm about at my wits end here.

 

Legend
September 11, 2020

I think (but I'm pretty sure I'm correct - bwdik) that you should have edited in a sequence with the same timebase as your sources...  so that your sequence settings should have been 23.976 progressive (also known as 24p).  Then when you exported it to 29.97 the pulldown would have been added consistently.  With your current workflow, each time you drop a 24p clip into a 29.97 timeline, it's arbitrarily adding a different cadence.   Not sure if the export process is the ideal way to add pulldown for the best quality...  youo might want to do some googling.

 

If you have AfterEffects, you can test  your output file to see if it can remove pulldown.  You do this with the "interpret footage dialog."  You may also be able to do this in Premiere, but I seem to remember having some issues with that.