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24p sampled at 24fps? I guess the 200 will be the same…
Does this camera actually record at 24 fps, as in, does it sample what
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5 Replies
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The camera records 24 pictures each second. These are then pulled down electronically- much the same way film is telecined to video to achieve a standard 29.97 frame rate. This can then be reverse telecined in post to achieve the original 24 frames on a computer. It is also capable of shooting at 29.97- aka 60i so you get footage that looks like a normal video camera if you desire such a thing.
Noah
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The answer is: the camera shoots 24 individual, discrete, progressive frames per second, each one evenly spaced 1/24 of a second apart. Exactly the way film does.
There is no conversion going on. There’s no bogus “CineFrame 24” type of action here — the CCD is a variable-scanning-rate CCD. It can scan at 24Hz, 30Hz, or 60Hz.
When recording, the camera has to comply with DV’s NTSC 60-field standard. So 24 progressive frames get written to tape using 2:3 pulldown, exactly the same way film does it. 30p gets written to tape using progressive-segmented frame technology, each frame is split into even and odd lines and written to two fields, the same way the Sony CineAlta does it.
The 24p frame rate of the DVX delivers motion that is indistinguishable from film shot at 24fps. If you transfer film to video and split-screen it against DVX footage on video, you’ll see that the motion is absolutely identical between the two.
The HVX uses the same technique for 1080/24p. For 720/24p it doesn’t even have to do the pulldown — it writes 24 frames directly to the P2 card. The file on the card is a native 24p file, no duplicate frames and no pulldown.
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Hey Barry,
Nice answer, you guys don’t need me around here. 😉 I could not have answered that any better.
Best,
Jan
Jan Crittenden Livingston
Product Manager, DVCPRO, DVCPRO50, AG-DVX100
Panasonic Broadcast & TV Systems -
Thanks for the clarity!
Chris
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Barry,
Perhaps the most succinct answer I have seen to this question. Thanks, I’m going to print that one off for reference.
David
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