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A.Y.

Member Since 04 Jul 2009
Offline Last Active Yesterday, 03:39 PM
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Posts I've Made

In Topic: Nauticam Shogun Housing is here

Yesterday, 02:58 PM

fcpx-a7s.jpg

 

Thank you Eric Cheng for making the ProRes 422 700Mbps clip available for us to examine. The white balance of the original footage is excellent. Is it right out of the camera? The details and dynamic range this system captures are amazing.

 

Since I dive the California kelp forests often, this is my suggestion on grading to restore some of the kelp colors. It's just a quick adjustment, masks should be used to add more contrast in the mid-tone areas.

 

I'll remove this image in case it violates Wetpixel copyright policy.


In Topic: Nauticam Shogun Housing is here

20 May 2015 - 07:40 PM

Found the original, thanks!


In Topic: Nauticam Shogun Housing is here

20 May 2015 - 04:06 PM

 

Since this Shogun Showreel contains footage from Eric Cheng, most people on Wetpixel must have seen it already.

 

1:02 into the video - such impressive dynamic range.

 

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CORRECTION: The GH4 and A7s were mentioned on the page, but I just realized only A7s ProRes 8bit 422 footage appeared in the video credit, not the GH4 10bit 422.


In Topic: Nauticam Shogun Housing is here

16 May 2015 - 02:13 PM

Prores supports any resolution but was designed for 1080p it's an inefficient codec without temporal compression that came up when the best you could do was avchd 24 Mbps.

For what concerns the shogun it's an interesting tool but 220 Mbps seems a bit too low for extensive grading in 4K. At 1080p instead is plentiful

The shogun will produce fine results the amount of color correction you will be able to do with 220 Mbps at 4K is not a lot as every frame is pretty small in size.
Take an 8 megapixel image in raw squeeze it in a 1.14 MB JPEG now try to do some color correction you will see you can't do a lot.

 

To the moderators:

 

Amazing! This person keeps repeating these false claims as absolute fact! The truth is 220 Mbps is ProRes HQ 422 target data rate for 1080p30 only, its maximum data rate is 880Mbps or 110MB/s so each 4k frame size will be 1.8MB for 60p, 3.6MB for 30p, and 4.6MB for 24p. Atomos Shogun document shows it can record at 880Mbps or 110MB/s.


In Topic: Nauticam Shogun Housing is here

16 May 2015 - 09:10 AM

Prores hq 422 is designed for 1080p not for 4K

 

To the moderators:

 

A blatantly false statement repeated over and over to suggest Peter's Shogun/GH4 system is not suitable for 4K, completely ignoring the fact that other professional cameras use Prores to record 4k videos. Facing this type of negative behavior, anyone in Peter's position will be understandably frustrated.

 

Apple ProRes Specs opens with: "All Apple ProRes codecs support any frame size (including SD, HD, 2K, 4K, and 5K) at full resolution."

 

I've personally used FCPX / ProRes422 and 444 to edit 4k videos with good results.