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Frame Rate Fun – not…
Shot p2 at 24PN over 59.94 (to be used in TV commercials) on our HVX200. Trying to end up with a telecined film look in the end product. Used P2 Log to import onto disk. All clips are indeed 23.98 in FCP 5.14 browser window. They drop into a 23.98 sequence and play nicely with no rendering. I would like to archive them onto HD Tape via firewire to our AJ1400 HD deck thinking the deck might “sense” the 23.98 frame rate of the sequence and preserve that rate. Tape playback “looks” correct after recording to the deck But upon recapture, the clips are now 59.94 fps. So I figure, the deck only “records” 59.94 fps after all. Stepping through them in the 59.94 seq reveals random extra frames (to be expected?) but they seem to play smoothly. Not sure how I could get the footage back to the original 23.98 rate I started with. I am sure I am not going about this the right way. Advice?
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3 Replies
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Hi Jeff,
If I’m not mistaken, if you recorded 24PN, then you didn’t record over 60 (or 59.94). The N in PN means “Native” so the camera doesn’t record the extra frames that would need to be removed as pull-down in post production (which is why you get more recording time on the P2 card). I believe if you want to output to HD tape, then you have to record 24P (which IS over 60) because DVCPro HD tape only records “over 60” (this is assuming I recall my HVX200 Bootcamp training correctly). Barry Green or Shane Ross maybe able to offer some more input for your situation specifically.
Steven Gladney
Sometimes the obvious is hidden in plain view.
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When you record DVCPRO HD to tape with a Varicam…shooting to tape…and you choose the 24p setting, it records at 59.94 fps, but it flags the footage as 23.98. In essence it records 23.98 at 59.94. FCP recognizes the flags and will remove the pulldown as it captures.
Now…I don’t believe that FCP, when outputting 23.98 to tape, “flags” the footage as 23.98. I believe that it is just sending out a 59.94 signal and that is what the tape sees. Because my output settings are 59.94.
But what do I know? I don’t output to DVCPRO HD all that often.
Twice thus far.
Shane
Littlefrog Post
http://www.lfhd.net -
[Jeff Carson] “Not sure how I could get the footage back to the original 23.98 rate I started with. I am sure I am not going about this the right way”
jeff
Everything is correct. This is the way all 720p24 is laid to tape, with those redundant frames in the video stream.
your HVX can record with out the redundant frames because it is a computer recording to P2 memory cards,
The tape deck handles the 23.98 conversion correctly adding the Pulldown (in your case a 2:3 pattern of duplicate frames ) to properly be able to play that footage out as the SMPTE standard for the 720p60 video.
All you need to to is recapture the content from your tape as 720p 23.98 and FCP should remove the redundant frames on ingest.
gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows
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