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Messages - HurtinMinorKey

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271
EOS Bodies - For Video / Re: Shutter speed during video???
« on: May 03, 2012, 07:31:11 PM »
Thanks for that explanation.

So technically, adjusting the shutter speed through it's range would also alter the "smooth/roughness" of the video, regardless of the fps? Ideally would you set shutter speed to match fps or slightly faster?

The most typical setting is a 180 degree shutter angle. Which means that for each frame half the time the shutter is open, half the time it is closed. So @ 24fps each frame lasts 1/24 a second, so a 180 deg. shutter would imply a shutter speed of 1/48.  You can go slightly slower if you want, but it won't be as "film like", plus the mkii can't go below 1/30 in video mode.

If you are using a 5D mkii, there is no setting for 1/48, so go with 1/50. Notice that if you want to control your depth of field, you are only left ISO as a degree of freedom unless you use something like a neutral density filter to control the amount of light coming in.

272
EOS Bodies - For Video / Re: Shutter speed during video???
« on: May 03, 2012, 04:32:48 PM »
I believe Saving Pvt. Ryan battle sequences used a combination of increasing the shutter speed and dropping the fps to achieve that look. 

273
EOS Bodies - For Video / Re: Shutter speed during video???
« on: May 03, 2012, 02:15:29 PM »
Shutter speed determines how long the sensor reads the image during the frame. So if you are shooting at 30 fps and shutter speed of 1/90 you'd have open shutter for 1/90 of a sec, and closed shutter for 2/90 of a sec. This affects motion blur in the frame, just like it would on a still. For the most "filmic look" you should use 1/50 on the 5dmkii at 24 fps. A film camera would normally shoot at 24 fps with 1/48 shutter speed. This is also known as  180 degree shutter angle, where the shutter is open for the same duration, each frame, as it is closed.

274
Note that the Y:Cr:Cb colour space can be converted back to RGB (it is simply a different 3-dimensional representation of the same data). Missing Cr:Cb values are filled in from surrounding values and then each pixel is converted back. This is done when viewing the movie.


This is what I was saying, they are the same essentially in terms of the relevant data they carry, with maybe a affine transformation between them.  Which is why I thought that MAYBE, the Bayer pattern, which is like a native 4:2:2 sample, might have something to do with preventing a 4:4:4 output, without serious processing/interpolation.

Also, 8bit is nice, but since monitors are only 8-bit(RGB totalling 24)  the extra bits are ONLY use full in post. Theoretically the extra-bits don't give you a better picture, if you have the proper white-balance/exposure to begin with.

I think I've read that wiki article 10 times, great stuff.

275
EOS Bodies - For Video / Re: 5D Mark III Magic Lantern wish list poll
« on: April 30, 2012, 04:07:51 PM »
Does anyone know where you can download a editor that can edit Canon firmware ?

276
EOS Bodies - For Video / Re: 5D Mark III Magic Lantern wish list poll
« on: April 29, 2012, 07:54:49 PM »
When expressing chroma subsampling ratios the 4:2:2 doesn't refer to primary colours as G:R:B, it's Y:Cb:Cr which refers to Luminance (Y) and two colour difference components Blue Difference (Cb) and Red difference (Cr)

I think that they are one in the same (G:R:B and Y:Cb:Cr) in this application, but I'm not certain.

277
EOS Bodies - For Video / Re: 5D Mark III Magic Lantern wish list poll
« on: April 29, 2012, 01:47:19 AM »
^ just to be clear, i wasn't subverted by someone else's posting, i came up with that lunacy on my own.  But I agree with the spirit of your post.

I know that the camera is 22 MP, but the Bayer pattern is set up at a 4:2:2 ratio, which that means that their are effectively 11 M Green photosites, 5.5M red and 5.5 M Blue. 

If they are alternating lines still, then there just isn't enough information for them to end up with a full HD picture using equal ratios of color information without interpolation. 

278
EOS Bodies - For Video / Re: 5D Mark III Magic Lantern wish list poll
« on: April 28, 2012, 08:14:57 PM »
Is it true that a camera like the 5D3 can't do 4:4:4 color because the Bayer sensor is set-up as 4:2:2?


279
This could potentially be huge.  The mk3 is a video beast waiting to be let out of its cage.

280
EOS Bodies - For Video / Re: 48fps - Too Fast?
« on: April 26, 2012, 12:48:15 PM »
I read the two links before you posted them. MY point was, that even thought Peter Jackson is using 48fps for smooth 3D, most of the people around here who are "whining"(as you say) want 60fps so they can have the option for slow mo.  At least that's my impression.


281
EOS Bodies - For Video / Re: 48fps - Too Fast?
« on: April 25, 2012, 05:33:07 PM »
I think most people want 60p so they have the option to slow things down.

282
EOS Bodies / Re: 1DX to ship next month.
« on: April 25, 2012, 04:48:19 PM »
It has to be out before the summer games.

283
EOS Bodies - For Video / c500
« on: April 25, 2012, 02:10:47 PM »
C500

http://cinemaeos.usa.canon.com/media-gallery.php


They got Jeff Cronenweth, David Fincher's DP, who uses RED to play with it.  Maybe he got sick of RED's performance in The Girl with the Dragon Tattoo.  He's a master, it'd be sweet if Canon could convert him.

284
yup. you have a SWEEET setup with that zeiss glass. no offense to the so called "L" division at canon but Zeiss glass is in a league of its own in both build quality and image quality. They are totally worth the premium because you get something that looks like the work of a skilled craftsman instead of the cheap mass produced feeling from canon lenses.

What premium? I thought the L glass was twice as expensive too?

285
Did you see the credits? I can't believe it took that many people to produce such a sh*tty project.  That being said, the natural night-time lighting stuff was pretty amazing. I don't think there is another camera out right now, at any price, that could have done that well in the dark.

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