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First APP to create 2K 4:4:4 from your GH4 4K 4:2:0 video!


Thomas Worth created an APP to create 2K 4:4:4 files from your GH4 4K 4:2:0 recorded video (download at EosHD forum). Nick Driftwood resampled his 4K file and this is the result:

Panasonic GH4 C4K to 2K 10-bit Pro Res 444 from Rarevision – improves luminance from Nick Driftwood on Vimeo.

You can download the full 2k 4:4:4 video from Nick on Vimeo. Quite amazing the quality you can get out of the GH4 recorded video!

North American preorders, shipping date and price:
GH4 camera at Amazon (Click here), Adorama (Click here), BHphoto (Click here), and Panasonic (Click here). Price: $1,698. In Canada at Vistek (Click here).
GH4 camera with interface unit at Amazon (Click here), Adorama (Click here) and BHphoto (Click here). Price: $3,298
Interface unit only at Amazon (Click here), Adorama (Click here), BHphoto (Click here) and Panasonic (Click here). Price: $1,998

Europen preorders, shipping date and price:
Germany: Wexcameras,
UK at Wexphotographic, CameraWorld, UKdigital, CVP, TipTop.
Holland at Fotohanskeuzekamp.
Belgium at Fotokonijnenberg.
Norway at Fotovideo.
Sweden at Cyberphoto, Skandinavianphoto.
Finland at Telefoto, Topshot, Verkkoauppa.
France at Photocineshop.
Spain: Fotoboom.



  • Matt

    Are there others besides me who get bored scanning through all these 4K news and rumours? I have zero interest in 4K or very high-end video and wonder if it’s better if another high-end video rumour site should be created so that we can be be spared more and more of these rumours or news.

    • Surab

      Not all. I understand that some are more interested in the still stuff, but my POV is that if I am not interested I don’t have to click on it. This is a site for rumors and news for (m)43rds stuff and this video feature that Pana implements are part of it.

      Actually, I think that Pana is helping the system a lot by attracting the video guys. Oly definitely has to jump on that train. m43 is becoming more and more (if it wasn’t already) a hybrid format.

      In short: I like the news and rumors as they are at the moment. ;)

      PS: @admin: No, new rumors lately on new gear? We geeks also want to read something about the mysterious stuff. :D

      • Don

        I am one of the video guys attracted by m43. If not for video, I would definitely not choose GH3 a year ago. I now greatly appreciate the value of m43 and GM1 is my go to camera for weight and simplicity.

      • Sqweezy

        New gear? There was a bunch of new stuff announced at NAB this week!

        • Surab

          But that is not new enough (i.e., it is already announced!). ;)

    • i get as bored as i hear photographic topic like color abberations and organic sensors….i guess its normal that lots of topics dont have crucialt meaning to most people.

    • It’s a quite time now. I am working to get soem PEN rumors now. But there is not announcement any time near. ANyway, a couple of rumors are about to come.

    • Uberzone

      Like it or not, 4k is the future and it is here to stay. In 2-5 years 4k will replace 1080p as the standard. The exact same thing happened when transitioning from SD to HD. Everyone said there was no need, “I don’t even have a TV/monitor that can display 1080p”, “my computer can’t handle 1080p files”, etc… etc…. While 4k may only seem relevant to professionals right now, in the next year consumer products (computers,monitors,TVs, data storage devices) will catch up and suddenly 4k won’t seem like such a far stretch for the average consumer.

      • No they won’t…
        There will be zero content and people’s TVs are too small. We will see more 4k computer monitors and professional cameras but that’s where the adoption makes sense. Only in content creation not in consumption.

        • Uberzone

          TV makers have been hurting the past few years from poor sales. This has caused several top tier manufacturers to bow out of making TV’s all together. Panasonic is a good example. Do you really think they are going to let this opportunity pass to convince people they need to buy a new 4K TV? Many manufacturers have already released a few 4k TV models and pretty soon they are going to be the majority of what is produced. 4k dvd players and discs will follow and studios will release the content (much like the transition from DVD to Blueray). If you build it and create consumer demand, the content will come.

          I’ll agree that it doesn’t make much sense and is probably not needed in a home viewing environment with such close viewing distances. But the hype machine and expensive marking will spin it and convince everyone otherwise.

          For the record I don’t even own a TV. I’m going to hold out for 8K. :)

          • You realize that computer monitor resolutions have been basically the same for 15 years now? This used to be a given constant in computer graphics. I would love a 4k monitor to work on, but I’m not going to pay out the ass for it and I can afford it. That’s how little of an improvement 4k would be… and I’m in the small minority that it would benefit at all.

            I have a 120″ projector screen and the difference between 1080p and 720p is subtle from 12 feet away. SUBTLE!

            Yes, if the 4k is just as cheap as 1080p then why not? But that’s currently not the case. 3d became basically as cheap as non-3d and millions of people have 3d tvs and don’t use the 3d. 3d adds immersiveness. A 60″ tv from 10 feet away is not immersive to begin with, of course 3d didn’t take off…

            This same thing will play out with 4k. Yes, they will get people to buy 4k tvs but only when they’re just as cheap as 1080p tvs and then there will be very little content for them. It’s still hard to get 1080p streamed at a decent bitrate and most people still watch 720p tv and that’s as hi-rez as they get (and as hi-rez as they need for their 60″ tvs at 10feet….)

            Anyway… When tvs get bigger and lighter (and networks get faster) we will have 4k content and it will be ubiquitous. Right now 4k is just the SACD and DVD-Audio of the video world. It’s superfluous but it makes complete sense to record and master in because it improves flexibility and the quality of the finished product @1080p….

            I can’t name a single person I know who is excited about buying a 4k tv or watch 4k content…. You’re not even excited about it. They have to go up to 8k to get your dollar apparently…

            • John Gary Whalen Jr

              Well TV’s, computers, etc. always get faster, smaller and cheaper. However, unless 4K becomes in higher demand, companies will not innovate to create better, smaller, faster, cheaper 4K displays. And using 3D is a poor example since digital 3D is re-hashed cinema trash based on 3-D film and S3D ( stereoscopic ) film technology from 1915. 4K has not been around for over 95 years, and in the future, 4K will be just as despised as SD resolution.

              Right now 4K’s only limitation is delivery. Much of the 4K content will only totally replace 1080p once the average consumer believes there is a marked difference in IQ and resolution over 1080p. The masses need to buy into it for 4K to continue to grow.

              The first way to push 4K in a big effective way is by sports events. The next FIFA world cup will be shot and broadcast in 4K. People will be blown away. When the NFL and college football shoots and broadcasts in 4K that will create another crave for higher resolution.

              8K is already out right now however there are no streamlined post editing programs/processes to handle that much data. However someday kids will laugh at how the hell we could stand to look at 4K resolution.

    • MikeH

      It’s just you… 4k is a feature of the GH4, which is a micro 4/3 camera. Learning about how people are able to use the results of 4k video feature is valuable. You can always just not look at the articles with the feature, it isn’t difficult to scroll past them as they are clearly marked.

  • Surab

    Hey guys, does this 10bit 4:4:4 make the IQ better right away or is it only something which is needed so that one can get more from the file in post? The same goes for the 200mbit ALL-I 1080p videos: will a total amateur see a difference or is this again for grading and what not.

    Just curious, because in the first case I would also benefit from it. I do not intend to post process at all, especially videos! I am a bit tempted by the GH4, because of the swivel screen, the solid body, the great IQ for both video and still and most importantly of course the 4K feature (8 MP continuous burst with some kind of C-AF!) and of course future proofness. D).

    Thanks in advance.

    • Joe

      It’s always trash in trash out in post, so 10bit 4:4:4 input will definitely give you better output in terms of IQ. But these converted DPX files are huge. You need a lot of computer power and storage, as well as time, to convert and process these files.

      • Surab

        So they will not really benefit an amateur. I expected this, but still would have been a reason to consider the Gh4. :P

        Thanks for the response.

  • Joe

    Almost 18MB per frame for those DPX files, one minute footage at 25fps needs to render to almost 27GB of data. Are you joking:)

  • SoWhat?

    What’s the point of this video? Where can I see comparison between 1080 made from 4K versus originally recorded as 1080 to check whether there’s any difference?

  • justsaying

    When it’s gone it’s gone, there is no magic involved in this process and lost information cannot pof back to life. The only utility I can see is to interpolate the lost information and incorporate the interpolation into the stream, what you gain by doing that is meaningless but I guess some might find it usefull.

    Same thing as taking audio sampled at 12 resample it at 16 bit and expect to recover dynamic range, nope, not gonna happen. Only usefull when processing, so if I process 422 video in 444 the processing will be finer but the footage will remain the exact same quality. Interesting to know most editor already let you process 422 footage in a 444 processing workflow.

  • Orange

    Admin you should be acknowledging sources when they are websites with exclusives.

  • mk

    This is huge if working in HD… with this kind of processing you can get 4:4:4 HD right out of the body and no need for the interface unit and an external recorder.

  • 4k’s only limitation is not delivery. It’s limited by the fact that most people can’t see it!!!!!!!

    99% of people’s living rooms will show no difference between 4k and 1080p. The screens need to get larger to make a difference.

    • John Gary Whalen Jr

      That’s sort of true because I feel that’s a matter of personal opinion. Differences in resolution based on PPI (pixels per square inch) density is purely subjective and depends on whether one person thinks it looks better or not.

      The biggest problem with 4K right now is still it’s delivery. How many consumers have 4K televisions? How many broadcast media conglomerates broadcast in 4K? How many motion picture studios regularly shoot in 4K? Will the NFL or NCAA start shooting in 4K anytime soon?

      Of course there are several issues with 4K in general like:

      1. Cost prohibitive: Until the GH4 came along, 4K was reserved for $12K devices plus a rig and other expensive hardware.

      2. No 4K industry support: There is currently no hardware/software that streamlines data transfer, movie editing, or storage of 4K footage for the indy producer or average consumer.

      3. Delivery: Nobody can actually watch 4K on a proper 4K display nor is there a widely accepted method of 4K delivery via internet or broadcast media. And seeing that only Netflix is taking 4K seriously with House of Cards, I feel Delivery is still the largest roadblock of all the issues 4K needs to overcome before becoming the new standard.

      • Personal opinion? It’s a matter of the physical limitations of the human eye at most viewing distances with most screen sizes. The only place opinion enters into it is how tricked someone is by marketing to believe they will be able to see a difference and then those people will only pay so much more. You can’t make a video format mainstream that only benefits people with 120 inch screens… It doesn’t work. Look at dvd-audio or sony’s sacd. The only people who bought them had more money than sense.
        That doesn’t stop things from being mastered with higher bit-depth or in the case of 4k–with greater resolution. It improves the quality of the finished product.

        The only way 4k will catch on is if it becomes just as cheap as 1080p… Which is how 1080p caught on. Most HD content out there is still 720p and it’s good enough for most people. They already aren’t using the 1080p that they were sold!

        • John Gary Whalen Jr

          Well, that’s my opinion on the matter. I see no point in repeating myself since my points were succinct. If you feel differently, I respect your view. I suppose we shall just have to agree to disagree. Nice discussion though.

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