Pardon my ignorance

David Bird · October 8th, 2005, 08:57 AM

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?
Thanks - David Bird

Mathieu Ghekiere · October 8th, 2005, 10:25 AM

1/100 the slowest shutter? Are you sure that's correct? That seems so strange to me (although I don't know the camera)

David Bird · October 8th, 2005, 10:41 AM

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

John Jackman · October 9th, 2005, 08:12 PM

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.

David Bird · October 10th, 2005, 08:03 AM

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?
David Bird

Joshua Provost · October 10th, 2005, 01:28 PM

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.

Josh

David Bird · October 10th, 2005, 01:34 PM

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.
David Bird

Justine Haupt · October 13th, 2005, 09:11 PM

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.

Joshua Provost · October 14th, 2005, 09:49 AM

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.

Josh

October 8th, 2005, 08:57 AM	#1
David Bird Regular Crew Join Date: Nov 2003 Location: Sikeston, Missouri, USA Posts: 118	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? Thanks - David Bird

October 10th, 2005, 01:28 PM	#6
Joshua Provost Major Player Join Date: Sep 2004 Location: Phoenix, AZ Posts: 493	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. Josh __________________ Owner/Operator, 727 Records Co-Founder, Matter of Chance Productions Blogger, Try Avoidance

October 13th, 2005, 09:11 PM	#8
Justine Haupt Major Player Join Date: Oct 2005 Location: Long Island, NY Posts: 208	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. __________________ ~Justine "We are the music makers, and we are the dreamers of dreams" -Arthur O'Shaunessey (as quoted by Willy Wonka)

October 14th, 2005, 09:49 AM	#9
Joshua Provost Major Player Join Date: Sep 2004 Location: Phoenix, AZ Posts: 493	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. Josh __________________ Owner/Operator, 727 Records Co-Founder, Matter of Chance Productions Blogger, Try Avoidance

October 8th, 2005, 10:25 AM	#2
Mathieu Ghekiere Inner Circle Join Date: Jun 2004 Location: Belgium Posts: 2,195	1/100 the slowest shutter? Are you sure that's correct? That seems so strange to me (although I don't know the camera)

October 8th, 2005, 10:41 AM	#3
David Bird Regular Crew Join Date: Nov 2003 Location: Sikeston, Missouri, USA Posts: 118	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

October 10th, 2005, 08:03 AM	#5
David Bird Regular Crew Join Date: Nov 2003 Location: Sikeston, Missouri, USA Posts: 118	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? David Bird

October 10th, 2005, 01:34 PM	#7
David Bird Regular Crew Join Date: Nov 2003 Location: Sikeston, Missouri, USA Posts: 118	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. David Bird