p2 footage audio drop-out after 18 seconds

When I play the clip in L&T it has audio. I don't know what is happening with this footage. I've tried log and transfer several times, I used ProRes, Native and DVCPRO HD, I've tried transcoding only the audio. But in all instances the audio cuts out at 18 seconds ish.

I called the D.P and he's holding the P2 cards, but that won't necessarily solve the problem. The D.P. used the Panasonic utility to transfer the file, not drag and drop. It is a spanned file but the jump across cards come much later in the file.

Anyone ever come across something like this before?

Ethan@advantagevideosystems.com

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Is "remove duplicate frames" turned on?



www.strypesinpost.com

D.P called back. After 10 minutes of him telling me what an idiot I am he checked the file on the camera. It is corrupted. P2LogPro will output a file with audio, but doesn't seem to provide for 4 tracks.

But it just failed at trying to force to 24p, the "correct frame rate." Which leaves me with several choices to ferret through...The quotes denote sarcasm.

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> But it just failed at trying to force to 24p, the "correct frame rate."

P2 media shouldn't need to "force to" anything at the ingest stage. Did the DP shoot 24pN or 24p?


www.derekmok.com

The force came during p2logpros process. I did get that to function by closing out of FCP. The resulting file was then ingested using L&T, but this file was also missing audio after 18 secs, and was also out of sync.

The D.P. says he shot: 24FRAME DVCPRO HD 720 60p DVCPRO 100-720 24p(2:3pulldown)

Retrieving the cards hopefully today and see if I have better luck.

Back up the cards...so you have the full card structure. Turn off the REMOVE PULLDOWN option in the L&T Preferences (strypes mentioned this), and then import.

That is an error that comes up when you remove pulldown on footage that wasn't meant to have it removed.


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Yup, that did it.

The footage always reading as 59.94 in the metadata, really had me looking at everything. But I guess that's correct even though it's 24 frame progressive footage.

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> The footage always reading as 59.94 in the metadata, really had me looking at everything. But I guess that's correct
> even though it's 24 frame progressive footage.

I think that's a Panasonic quirk. Somebody correct me if I'm wrong because I only read about this feature, but this is apparently "Panasonic 24p" -- shooting 23.98fps but adding pulldown in-camera. "24pN" stands for "24p Native" and shoots only 23.98fps. You get longer recording time on 24pN because you're recording fewer frames, and if you wanted 23.98fps throughout the pipeline, you're supposed to shoot 24pN.


www.derekmok.com

Ah yes. Dear ol' Panny...

"24p" came out back in the day when they were marketing "the film look" and since tape in the NTSC world rolled at 29.97, they had to add a pulldown. Then came "24pA" when they realized that they could modify the pulldown pattern in a way that allowed the NLEs of the day to remove pulldown on import (remove 1 frame every 5 frames) and the NLEs could add a pulldown to display on their CRT monitors.. Both of these formats were designed for SD tape acquisition, which didn't support proper 24p or 24psF.

DvcproHD started life as a tape format, and I guess they kept the same terminology and later added "24pN" for native 24fps.

So yea, there is 24p, which is actually 29.97 fps, and there is 24pA which is 29.97 on the recording medium but designed for you to remove pulldown on import, and 24pN which is captured and stored as 24 fps.



www.strypesinpost.com

Btw, when I said 24 fps I meant 23.976 fps. Welcome to the NTSC world...



www.strypesinpost.com

This was the problem thank you.