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Crop Factor on 8K Helium / ProRes 4444 XQ

Damian Horan

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Was wondering if Red has discussed a firmware upgrade that would allow the Weapon 8K Helium and Epic-W 8K Helium to shoot 4K ProRes 4444 XQ? The new 8K Helium cameras appear to be incredible, but the one major flaw I see in them is the significant crop factor the cameras have when shooting less than 6K but having the ability to record 4K ProRes 4444 XQ off the full 8K frame would drastically help eliminate that major design flaw.

Right now the industry standard is still 2K, although obviously any time now the industry standard will be 4K so it is great to have the ability to shoot these high resolutions. Nonetheless, I've found it is very difficult to convince too many producers to even shoot 6K right now, so I just can't imagine there are going to be many non-studio productions that will have the desire or even ability to shoot in 8K. Thus that means that if you can convince a project to shoot 6K on the Helium sensor you will be dealing with a 1.12x crop factor on a Super 35mm frame, which isn't bad, but nonetheless pretty annoying to have a crop factor at 6K. If you can only convince a production to shoot in 5K (which I've found most low budget features prefer to shoot on if not even 4K) you are now dealing with a 1.35x crop factor, which is pretty significant. If you are working in TV and can only convince the production to shoot 4K (which again is basically the industry standard) you are dealing with a 1.69x crop factor, which is really unusable. So in basic terms it seems like the 8K Helium Sensor basically does not function at industry standard resolution, which seems like a shame for such an incredible camera.

Yes you can record 4K ProRes 422, but I think any colorist would tell you that this is not a professional finishing codec. If there was a firmware upgrade that allowed ProRes 4444 XQ (like the Alexa) recording off the 8K sensor, that would be a huge game changer, as the camera would be able to shoot 8K if a project could afford it, but for the 90% of projects that can't afford or don't have the desire to shoot 8K, you would still have a professional finishing codec for the industry standard of 4K without having to deal with significant crop factors.

Again not bashing the 8K Helium sensor, as it is truly amazing what Red is offering now, and it is completely amazing to have such a future proof camera. Nonetheless, it seems like for the most part the crop factor makes the 8K Helium sensor a less than ideal camera for most shoots (at least for the next 1-2 years or until storage and post processing power catches up to this resolution capability).

Thoughts? Am I off-base here? I really want to get the Helium 8K, but after delving into it, it just seems so impractical and limited unfortunately.
 
Damian;

Look at file sizes - the good news on 8K - is they are actually smaller than the RAW on Blackmagic's cameras - like the 4K Production - or Ursa Mini 4.6K (at 4:1 - the 4.6K has about the same file size - as this camera in 8:1 - meaning - about 28 minutes of footage on a 256 GB card).

Since; most productions I've worked on can handle the RAW files from those cams (including my old 2010 Mac Pro - though I did add a 12 GB graphics card to do so)... I think things should work out OK - but; I do agree - this would be a nice option in the interim!
 
Damian;

Look at file sizes - the good news on 8K - is they are actually smaller than the RAW on Blackmagic's cameras - like the 4K Production - or Ursa Mini 4.6K (at 4:1 - the 4.6K has about the same file size - as this camera in 8:1 - meaning - about 28 minutes of footage on a 256 GB card).

Since; most productions I've worked on can handle the RAW files from those cams (including my old 2010 Mac Pro - though I did add a 12 GB graphics card to do so)... I think things should work out OK - but; I do agree - this would be a nice option in the interim!

Actually - look here - in Cinema DNG - the file sizes on the Production Camera (RAW) - is almost TWICE as big as those in 8K 7:1 on the RED - allowing only 39 minutes of footage - on a 480GB card!!!! - http://garrettgibbons.com/blackmagic-4k-camera-battery-life/

So - I think this will be less taxing on systems then realized - if those producers have been shooting other cams with Cinema DNG or "Hacked" raw formats. Best!
 
hmm

hmm

cant you just set it to record only prores and set it to be 8k aspect size? also regarding crop factor, isn't 8k larger than s35 so you dont want to shoot 8k anyway? and as for why people wont finish in 422, every time i make stuff for distribution through the major players they want mpeg 2 crap or h264 or even interlaced 1080i. its not like Hulu or whoever asks you for insane stuff anyway codec wise? i make the stuff for them constantly and on these HD masters (shot in HD for major shows for years) its always pretty low bit requirements on their end. so i get that the colorists want insane versions and the DPs want 8k acquisition but it sometimes feels backwards when im going through hoops to make it interlaced...or fit a 4gb thumb drive, etc...

the main thing is if you dont want red raw but you do want S35 just set it to record MXF or Prores in that aspect ratio/field of view and skip the raw? but raw is great for coloring, and its far less data than arri raw or black magic raw and people shoot those constantly. red raw is by far one of the easier more robust raw formats these days, its been built to work with CPU/GPU and you dont even really need hardware anymore to run it (like my rocket x). red has years of R&D at this point and is miles ahead of shooting arri raw and trying to process it. thats why i dont get the people who are afraid of red raw vs arri raw. try arri raw on a 65! now that or phantom files will kill your machine and downloads, red certainly does not... you can shoot 3TB a day easily in phantom or arri raw files, not the case with red at all
 
Brian. Interesting call.

Just compared 8K to 35mm 3 perf on the RED crop factor tool - and you are right :-)

Looks like 7K is comparable.

I have mainly FF lenses (schneider and Ziess) - but am curious now if there will be a vignette at wider angles in 8K!

My camera is sitting at the RED Store - waiting for me to pick it up. Wish I could - but can't until Monday. Is kiiling me!
 
thats why i dont get the people who are afraid of red raw vs arri raw. try arri raw on a 65! now that or phantom files will kill your machine and downloads, red certainly does not... you can shoot 3TB a day easily in phantom or arri raw files, not the case with red at all
All the companies I know of using Alexa 65 (like the Marvel movies) are finishing in DPX or EXR, not Raw. And they're using a lot more than 3TB a day, particularly with multiple cameras.
 
Brian, I think the highest quality non-raw 4K file the Helium sensor offers is 4K ProRes 422 even if you set it to record just ProRes. Am I wrong?
 
XQ is such a killer codec. 4K XQ would be big though. If I'm shooting 2k prores I always use XQ though, it holds much more detail, really thick codec
 
Brian, I think the highest quality non-raw 4K file the Helium sensor offers is 4K ProRes 422 even if you set it to record just ProRes. Am I wrong?

Dragon weapon can do 2k XQ AND IT IS BEAUTIFUL!
 
XQ is such a killer codec. 4K XQ would be big though. If I'm shooting 2k prores I always use XQ though, it holds much more detail, really thick codec
I've compared ProRes 444 and 444XQ in projection, and there's no visible difference to me. Not with test signals, not with VFX, nothing. It's just 500MBps vs. 330MBps -- not enough to make a huge difference. To me, the bit-depth is the biggest factor.

No question, there is a visible difference between ProRes 422 and 444.
 
On the BM website it states CinemaDNG 4:1 @ 4.6K to be 135MB/s at 30 Frames
On the RED data calculator website 8K Full Format @ 7:1 to be 232MB at 30 Frames

So are the 8K 7:1 files bigger than CinemaDNG from 4.6k Ursa?

Damian;

Look at file sizes - the good news on 8K - is they are actually smaller than the RAW on Blackmagic's cameras - like the 4K Production - or Ursa Mini 4.6K (at 4:1 - the 4.6K has about the same file size - as this camera in 8:1 - meaning - about 28 minutes of footage on a 256 GB card).

Since; most productions I've worked on can handle the RAW files from those cams (including my old 2010 Mac Pro - though I did add a 12 GB graphics card to do so)... I think things should work out OK - but; I do agree - this would be a nice option in the interim!

Actually - look here - in Cinema DNG - the file sizes on the Production Camera (RAW) - is almost TWICE as big as those in 8K 7:1 on the RED - allowing only 39 minutes of footage - on a 480GB card!!!! - http://garrettgibbons.com/blackmagic-4k-camera-battery-life/

So - I think this will be less taxing on systems then realized - if those producers have been shooting other cams with Cinema DNG or "Hacked" raw formats. Best!
 
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