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Old October 8th, 2005, 09:57 AM   #1
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Pardon my ignorance - 24p

I'm gonna give this a shot. Intend to shoot, load into Vegas 6 and convert to 24p. I have read in many posts that 1/60 is the required shutter speed, however I have a Pana AGDVC200 and the slowest I can get is 1/100th. Will this present any problems?
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Old October 8th, 2005, 11:25 AM   #2
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1/100 the slowest shutter? Are you sure that's correct? That seems so strange to me (although I don't know the camera)
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Old October 8th, 2005, 11:41 AM   #3
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Yeah, well, according to my manual (such as it is) shutter settings are 1/100, 1/120, 1/250, 1/500, 1/1000, & 1/2000. Again (according to the manual) 1/250 is "standard" mode. I've rotated the shutter setting selector on many occasions and there's no "1/60" to be found.
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Old October 9th, 2005, 09:12 PM   #4
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Quote:
Originally Posted by David Bird
Yeah, well, according to my manual (such as it is) shutter settings are 1/100, 1/120, 1/250, 1/500, 1/1000, & 1/2000. Again (according to the manual) 1/250 is "standard" mode. I've rotated the shutter setting selector on many occasions and there's no "1/60" to be found.
David
1/60th is default when Shutter Speed is OFF on most cams.
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Old October 10th, 2005, 09:03 AM   #5
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OK...let's assume that 1/100 IS the slowest shutter speed available on my cam. Will this present any problems when I convert footage to 24p?
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Old October 10th, 2005, 02:28 PM   #6
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David,

Hm, that is an interesting dilema. I found this information that indicates the Synchro Scan feature can get you down to 1/61.9.

Assuming 1/100, you'll get a bit of exaggerated strobing when you convert to 24p. What method of 24p conversion are you planning on using? Most of them can be tested using demo software. Try downloading DVFilm Maker or Magic Bullert demos and run a test. You'll want to try a couple of things in the test. First, a camera move, like a pan or tilt. Second, stationary camera with subjects moving through the frame, like someone walking across.

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Old October 10th, 2005, 02:34 PM   #7
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Planning on using conversion to 24p in Vegas 6. Yes, I know that syncro-scan is at 1/61.9, but to tell you the truth, I don't know if that is a constant shutter speed.
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Old October 13th, 2005, 10:11 PM   #8
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I hate to risk sounding like an idiot, and I feel like I may have missed something, but are you mixing the terms "shutter speed" and "frame rate"?

Because I think you're referring to exposure setting (aka shutter speed)... 1/100th, 1/120th etc at 60 interlaced (the frame rate being fixed at 60 fields). Shutter speed being used in the manual for the time the "shutter" is open during eash 1/60th field sequence, with framerate fixed at 60 fields/s (30fps).

When deinterlacing for 24fps, the input file is shot at a frame rate (not exposure setting) of 1/60, which all non-progressive scan video cameras shoot at.
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Old October 14th, 2005, 10:49 AM   #9
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Justin,

We are talking about both frame rate and shutter speed. FYI, exposure is measured in terms of F-stops (F/2, F2.8, etc.), and we're not talking about that.

As you correctly point out, when shooting 60i intending to convert to 24p, it is recommended to shoot at 1/60 shutter speed. However, David is unsure that is the default setting for his camera, since his manual options start at 1/100 and go up from there.

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