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neil wilkes
neil wilkes
Legend
August 25, 2013
Question

24p & 23.976 Timecode question

  • August 25, 2013
  • 4 replies
  • 25335 views

When I have a sequence set to 24p, is the displayed timecode in the sequence in 24 or 23.976 form?

I ask as Chapter marks often seem off, and even with 24p sequences I seem to get output of 23.976 according to the media encoder.

Yet under sequence settings it states timedcode display = 24, and not 23.976.

What is the timecode display in the sequence actually showing me please? 24 drop or 24 non-drop? (24 or 23.976) and does it actually matter?

I am running PPro CS6.0.4 in this instance

Thanks

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    4 replies

    maximus-agABHB
    maximus-agABHB
    Participant
    June 17, 2014

    is this work from World Clock ?

    Steven L. Gotz
    Steven L. Gotz
    Inspiring
    August 25, 2013

    You can go to the Sequence menu and ask for the Sequence Settings and you should see if you are viewing Drop Frame or Non-Drop Frame (24 or 23.976) in the Video box under Display settings.

    If you are trying to match things up, you might find that changing it over to "Frames" instead (temporarily?) might help you to find the solution to your issue.

    artofzootography.com
    J
    jamesp2
    Participating Frequently
    August 25, 2013

    Steven Gotz wrote:

    You can go to the Sequence menu and ask for the Sequence Settings and you should see if you are viewing Drop Frame or Non-Drop Frame (24 or 23.976) in the Video box under Display settings.

    I believe you're mistaken here.  There is no option, in PPro or anywhere else, for 24fps drop frame time code.  It's either 24fps running at 24fps, or 23.976fps running at 23.976fps.  Material shot on film at a true 24fps time-base is played back in video at 23.976, but that's a different issue.  Once it's in video, it stays at 23.976 and that's the only time-base to measure it against.

    Steven L. Gotz
    Steven L. Gotz
    Inspiring
    August 25, 2013

    You are correct. I was wrong. Sorry about that. I was looking at the wrong thing, or rather, looking at it the wrong way. My apologies.

    I just put one minute of 24fps video from my Panasonic DMC-GH3 on a timeline. I then copied it over to create a 40 minute timeline.

    If I multiply 24 frames per second times 60 seconds, I get 1440 frames. Multiply 1440 by 40 and I get 57600 frames. I figured that would be long enough to detect any frame count issue.

    If I look at the timeline using 24fps as the setting, I see 40 minutes exactly. If I look at Frames, I see 57600. Therefore, footage shot at 24fps seems to be 24fps and not 23.976. Not so, as you have pointed out. So I looked deeper.

    My findings indicate that even though when I drop the footage on the "New Item" button I get this indicating that it shows up as 24fps but is being played at 23.976

    However, as I started to suspect using your information, if I look in the Sequence properties, I see it is longer than 40 minutes and yet the timeline says 40 minutes.

    The same thing showing frames:

    So that left me with the question of what the correct duration actually is. I get that the number of frames is just the number of frames no matter how fast they play back, but if the timeline says 40 minutes then it darn well ought to be 40 minutes. But it isn't!!!

    Time to check this in a different program.

    I put some audio below it and exported to Audition. It was longer than 40 minutes. Same thing when brought into After Effects.

    So, why in the world doesn't Premiere Pro have a Drop-Frame timecode for 24fps? Or am I missing something else? What is the correct method to work with this footage if the timeline lies to us?

    Very odd, and I thank you, James, for correcting me.

    artofzootography.com
    J
    jamesp2
    Participating Frequently
    August 25, 2013

    A sequence time-code setting of 24 only means that the system will count from 0 to 23 and then starts the frame count over again.  It doesn't indicate the actual time-base of the material.

    When you create a sequence, and choose a 24p present, you'll note that the preset description indicates the time-base is actually 23.976 -- because video does not run at 24fps.  All time-line timings should reflect that fact.

    E
    excited_Genie16B8
    Legend
    August 25, 2013

    I don't think there's any difference where timecode is concerned.  Seems like drop frame only applies to 30i.

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