180 degree shutter (proper shutter speed for 60p to 24fps?)

djkarn105

djkarn105

Well-known member
I knew the answer to this once but I suspect my hard drinking ways are responsible for my forgetting.

When shooting 60p for 24fps, you should shoot 1/60th because that's the closest you can get to 1/48th right?

Does it matter if you're using drop frame or interpolation to convert?
 
Do you mean for slow motion, or are you shooting 60p and converting it to 24fps for realtime playback?
If you mean for slow motion - you're best off going to 1/120 or higher, if you mean for convertion to 24fps for realtime playback then yes, you're best off at 1/60 as far as I know.

And as far as I can see, it should make no difference if you're talking about interpolation or dropping frames (which by the way now makes me realize you're probably talking about converting, not slomo) - the motion blur is going to be the same as what you captured on shooting either way.
 
alright that's what I thought but I suddenly panicked the other day and thought I was doing it wrong.
 
1/50 is the closest to 1/48, yes, and in many circumstances it's probably the right choice. BUT: if you're shooting under magnetic fluorescents or magnetic HMIs, 1/50 is a terrible choice, on *any* CMOS camcorder with a rolling shutter.

Don't just accept that 1/50 is "best" or you might find your footage with scrolling rippling waves throughout it! If you're shooting under fluos or HMIs, and you're not certain that they're high-frequency electronic ballasts, do yourself and your footage a big favor and DON'T use 1/50th! Use 1/60 or 1/40.

This, of course, only applies to NTSC users. For PAL users, 1/50 is safe at all times.
 
24p Judder is unacceptable, Why not shoot 60p?? HELP Please

24p Judder is unacceptable, Why not shoot 60p?? HELP Please

Everybody says 24P is the way to get best film look. But in my tests, I have about given up on 24P altogether. What am I missing here?

My new Sony NEX VG-20 is a very cool camera with the pro features I need for a small price in a small package PLUS it has BIG sensor and interchangeable lenses.

When I shot 24p with my DVX100, I liked the film look, and did not have many problems with JUDDER. I know about the 3.2 pulldown.

With DSLR's and my new Large format sensor Due to Judder, I have almost given up on shooting anything in 24P. I need some tips here.

My judder torture test is panning on a white picket fence. I know old film cameras shoot at 48fps with a standard 180 deg shutter. I know the cinematographers manual has charts about how fast you can pan. But everything I shoot in 24p right now flashes and looks crappy when the camera moves.

Today I tested and found 24P at 25 Frames to about 60 frames still has problems but was the best I could get. I do not really see a big difference between this setting and shooting 1080p at 60FPS.
(I prefer 30P but the camera does not have that option)
I am happily surprised that shooting at super fast frame rates like 500 or even 2500 does not seem to make any difference in playback. I am not sure why that motion does not really change. Am I alone in abhorring this judder? Does my CMOS sensor make it worse?
 
richriehl said:
Everybody says 24P is the way to get best film look. But in my tests, I have about given up on 24P altogether. What am I missing here?

My new Sony NEX VG-20 is a very cool camera with the pro features I need for a small price in a small package PLUS it has BIG sensor and interchangeable lenses.

When I shot 24p with my DVX100, I liked the film look, and did not have many problems with JUDDER. I know about the 3.2 pulldown.

With DSLR's and my new Large format sensor Due to Judder, I have almost given up on shooting anything in 24P. I need some tips here.

My judder torture test is panning on a white picket fence. I know old film cameras shoot at 48fps with a standard 180 deg shutter. I know the cinematographers manual has charts about how fast you can pan. But everything I shoot in 24p right now flashes and looks crappy when the camera moves.

Today I tested and found 24P at 25 Frames to about 60 frames still has problems but was the best I could get. I do not really see a big difference between this setting and shooting 1080p at 60FPS.
(I prefer 30P but the camera does not have that option)
I am happily surprised that shooting at super fast frame rates like 500 or even 2500 does not seem to make any difference in playback. I am not sure why that motion does not really change. Am I alone in abhorring this judder? Does my CMOS sensor make it worse?
Click to expand...

Hacked GH2s running the Driftwood patches don't have this motion issue.
 
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