Offtopic Thu, 30 Mar 17 00:54:27 -0600 Offtopic en-CA Depth of Field and Lens Equivalents Fri, 22 Jan 2016 17:29:53 -0700 MikeLinn 14474@/talks/discussions

Semicinductors industry has serious issues, stop will follow Mon, 25 Jul 2016 12:54:04 -0600 Vitaliy_Kiselev 15422@/talks/discussions image

After more than 50 years of miniaturization, the transistor could stop shrinking in just five years, this is the prediction of the 2015 International Technology Roadmap for Semiconductors, which was officially released earlier this month.

After 2021 it will no longer be economically desirable for companies to continue to shrink the dimensions of transistors in microprocessors. Instead, chip manufacturers will turn to other means of boosting density, namely turning the transistor from a horizontal to a vertical geometry and building multiple layers of circuitry, one on top of another.

19 companies were developing and manufacturing logic chips with leading-edge transistors in 2001. Today, there are just four: Intel, TSMC, Samsung, and GlobalFoundries.

This guys did not tell you full truth. For all last manufacturer processes companies had marketing process values and real process values. In old good times each generation of process really meant proportional reduction of all elements, it is no longer the case. Especially with 14nm processes that are not really 14nm.

Optimistic statements with many 3D wafers and such are overly optimistic. Due to difficulties such process is very costly and available to top manufacturers only. All such processes are not usable in high speed and thermally intense areas due to cooling issues, this mean GPUs and CPUs. Now it is only some flash memory that is made using similar approach.

Clueless questions: electronic shutter Thu, 30 Jan 2014 17:37:33 -0700 Riker 9501@/talks/discussions I don't know why is this bothering me at this time of the day, but for some reason, it does. So I'll ask.

Electronic shutters. Why are they not on every m43 Lumix camera? Or any m43 brand? Why does my GH2 have a shutter curtain and the worst possible clonk shutter sound in history?

If the camera can take videos by electronically turning the shutter on and off, why can't it do the same with photos? How is it "cheaper" to put a physical hardware into the camera, a piece so crucial to the operation and functionality of the entire thing?

Is it that impossible to make shutter "open and close" electronically for photos like in the movie mode?

Triumph of meanness Wed, 05 Mar 2014 07:52:56 -0700 Vitaliy_Kiselev 9796@/talks/discussions NOTE This topic is kind of personal topic. Contains only specific films that I watched personally.

Limited discussions are permitted but are removed with time, so only films remain.

Opposing topic -

All three films can be expressed in this three words - triumph of meanness. People who deserve to die, who have no real value and no real attachment to audience. People who do all they can (and something outside their abilities) to die fast - somehow survive (mostly due to complete logical and technical idiocy of everything around them). And we are not only supposed to be on their side but even pay for watching this crap. It must be all in reverse, such films must be shown by force in special camps were new breed of hamsters will be created.

HTTPS / SSL now works on PV Wed, 25 Jan 2017 22:53:08 -0700 Vitaliy_Kiselev 16370@/talks/discussions All must work, except mixed content on topic with images.

Images still are served over http, must be fixed soon.

Amazon Wed, 30 Nov 2011 22:33:40 -0700 Vitaliy_Kiselev 1604@/talks/discussions ]]> Remember to support us 6 Sun, 19 Mar 2017 23:12:42 -0600 Vitaliy_Kiselev 16612@/talks/discussions We are making small request again

  • PV does not have ads, "sponsors" or anything like such crap injecting stuff.
  • We even do not have auto playing video ads what became trend in last few months. :-)
  • Each month we pay for dedicated server hosting and it this sum is not small, and additional daily backup located outside of hoster network (for safety).
  • We don't have big team to support site. No admins, paid moderators, etc. All this time is invested in keeping this community alive.
  • Remember to support regularly, even with very small amounts, if you are in economic trouble.

Where we are going:

  • Exhibition coverage planned - Photography show and NAB
  • Lot of new lab equipment, all of it will be used in lab report, we are learning and do some software stuff
  • We are making gear reviews and slowly improving in it -
  • We are improving our deals and added new partners and good items like Nebula gimbals, big Fotga update is also coming
  • Plan to make systematic guides for basic lighting, audio still in place. Something what you can compare to good book.
  • Made secure site version working fully last month, this month we will improve some responsiveness and later move to mobile
  • Still slightly short to get lab grade spectrometer for measuring lights and filters (but we already got monochromator)

We need your help, remember to donate using orange Donate button above this page!

Thanks in advance.

An open letter to Canon Sat, 18 Mar 2017 21:12:17 -0600 MikeLinn 16607@/talks/discussions

Incorrect quote about Communism Tue, 14 Mar 2017 00:54:18 -0600 caveport 16592@/talks/discussions “The theory of Communism may be summed up in one sentence: Abolish all private liberty.”

― A.E. Samaan

EOSHD and Cinema5D Wed, 08 Mar 2017 05:45:36 -0700 4CardsMan 16561@/talks/discussions Andrew has taken up the cudgels and he scores some points:

A new lossless, infinite compression algorithm Sun, 15 Jul 2012 20:23:04 -0600 cbrandin 3918@/talks/discussions A Thought Experiment on the Relationship between Information Entropy, Randomness, and Effort

Can truly random data be compressed? The conventional answer is “no”. Like many conventional notions, that is incorrect. Not only can random data be compressed, it is trivially easy to do so.

Most would agree that if one were to attempt to compress numerous files containing random data, out of pure luck some of the processed files would end up somewhat smaller than the originals. Conversely, some of the processed files would end up somewhat larger than the originals. In fact, nearly all processed files would differ slightly in size from the originals, even if all the original files were the same size. However, taken in the aggregate, the random random data files would require the same amount of storage as the processed files – right? Well… not necessarily. By adding a simple rule to the compression algorithm one can have a collection of files containing truly random data that always requires less space to store than the original collection.

The rule that accomplishes this only requires that a simple decision be included in the processing sequence: if the processed file is smaller than the original, use it; if it is not, use the original. This will result in a statistically small, but significant and repeatable compression of truly random (i.e. entropic) information.

Can the resulting collection of files be further compressed? Absolutely! If the data in the files is somehow transformed (using a lossless transform) – the entire compression scheme can applied again resulting in approximately the same degree of compression achieved the first time. This is true because random data is already “uncompressible” so the entire process started out as a worst case scenario. Alternatively, one could leave the collection of files alone and use a different compression algorithm instead.

Can this process be executed ad infinitum? If so that would imply that given enough iterations, the minute amount of compression realized at each iteration could add up to – well… an arbitrary amount of compression.

In fairness one would have to include the information about this algorithm into the calculation of the total data volume. But that won’t matter because there are self-modifying transforms that can achieve an infinite number of different results, so only a very small amount of storage would be necessary. Besides, the algorithm data can also be compressed.

This implies that information and effort are related and interchangeable – much the same way matter and energy are. In fact, it wouldn’t surprise me if that if the amount of processing required to achieve significant amounts of compression wouldn’t end up being calculated as the energy expended for the processing being equal to the storage savings multiplied by …wait for it… the speed of light squared.

I’m a little busy these days. Do any of you have time to put this lossless, infinite compression algorithm, together? If you get it to work, I’ll split the royalties with you.

My apologies to Claude Shannon… I wish he were around to reply.


Safe list Sat, 12 Apr 2014 21:15:20 -0600 Vitaliy_Kiselev 10151@/talks/discussions Special topic devoted to proper, safe to watch films.

What it means "safe to watch"?
It means that your television set / monitor will become undamaged after viewing this film. All windows will be intact.
No hostages will be taken as the result of viewing.
Brain damage will be minimal. In case if you still have some grey cells they might even get some real work.
And you even won't use bucket for vomiting.

Opposite topic -

P.S. Heavy moderated personal topic, post only double checked entries and only after PM me, so no complains. All movie discussions must go into separate topics.

What F-stop is ideal? Sat, 25 Feb 2017 23:36:53 -0700 suresure123 16511@/talks/discussions I have read a few times of DOP's choosing one f stop and sticking with it for the whole movie. I have heard 3-4 mentioned quite a few times over the years.

I have a few questions, how does this translate from general filmaking 35mm stock to a a micro four third lens and sensor?

Plus do you think keeping a steady f stop is a good idea and would you do it for a documentary? Personally I'm done with shallow focus wedding video looking stuff and want to shot my doc as similar to film as possible.

*Maybe another whole subject but how to people keep a consistent look in terms of ISO/grain, lighting etc across a whole movie or documentary. I know with Docs people expect jumps in media but if you wanted to maintain a standard exposure and grain how would you go about it in terms of settings? Would you ride the ISO up and down or aperture?

Netflix publishes "Meridian" as original, 89GB sized, 4k HDR MXF file Mon, 19 Sep 2016 14:48:32 -0600 karl 15757@/talks/discussions In what seems like a really noble gesture, Netflix has published a large sample of professionally produced 4k HDR video in Material Exchange Format container under a Creative Commons license.

“Meridian” is 4K HDR video shot with 60 frames per second with a peak brightness level of 4000 nits and Dolby Atmos audio. In other words: It pushes the boundaries on all specs fronts, and includes a number of visuals that can trip up encoders.

You can download the MXF and some auxillary files at

The Millennial Marriage Proposal Thu, 16 Feb 2017 15:07:10 -0700 MikeLinn 16459@/talks/discussions

Revolution of Light Sat, 11 Feb 2017 06:11:11 -0700 radikalfilm 16445@/talks/discussions World, we could use your help. We've being literally lighting up a revolution for the last couple of weeks in Bucharest, Romania and all over the country, every single night, in the bitter cold. The picture below is from last Sunday (300,000 only in this square, some 600,000 all over the country). Tomorrow Sunday 12th February we're doing it again, and there are events all over Europe and the wider world which will light up in support. We want to make the news on the largest scale. This is why we fight: Join the resistance in your local event tomorrow or set up one! #REZIST #RESIST

Noob Question: 1080p to 720p benefit? Fri, 03 Oct 2014 17:13:46 -0600 ragnar 11479@/talks/discussions I see and understand how taking 4K footage and putting it into a 1080p timeline helps in regards to noise, scanning, and panning and zooming. Is the same true if I take my 1080p GH2, GX7 and LX7 footage and drop it a 720p timeline? Will I see less noise, etc?

Speedbooster owners - Need App asap! Thu, 09 Feb 2017 05:26:22 -0700 nobbystylus 16433@/talks/discussions I've hired a speed booster EF>MFT for a shoot i'm doing and the firmware is ancient and is causing all sorts of problems with my two lenses (18-35 and 50-100 on GH4) so i'm trying to update it but for some reason the Metabones site has a problem and is downloading the 'E' Mount version by mistake. I've email Metabones, but they're notoriously slow. Does anybody have the metabones app for MFT that they could email me?

Movie posters you like Mon, 13 Jan 2014 23:15:02 -0700 maxr 9340@/talks/discussions Hi there there community =)

This is very simple idea: hang/upload/embed a picture of a movie poster you like


A - The movie can be a piece of shit or a masterpiece, doesn't matter, what matters is that YOU like the poster

B - 1 movie poster at the time

You see, simple idea, now let's see about outcome, je je
BTW remember there's no point bringing a whale into Vitaliy bathroom :P - 800px wide is more than enough

As always, I'll brake the ice


Yen Tan design for Nor'easter / 2012 • IMHO not worth the watch, even if a 20$K Kickstarter financed film


Video autofocus mega test Sat, 17 Dec 2016 05:53:18 -0700 MikeLinn 16195@/talks/discussions

Meet A Real Asshole - Woman Reporter Trips Immigrant Fri, 11 Sep 2015 04:57:49 -0600 matt_gh2 13693@/talks/discussions We as the human race gotta do better than this. (Story with video below.)

4k : does it worth the effort? Wed, 25 Jan 2017 13:42:37 -0700 apefos 16368@/talks/discussions So we can buy 4k cameras since some time ago...

Some people can buy just because they have enough money, other people probably need to sell some used gear to get a 4k camera. There are cheap cameras like the G7, midprice like G8 and GH4 and more expensive cameras like the new GH5. In some choices you get the sensor stabilization also.

But the question is: do you need 4K? Do your clients, do your audience need 4k? Better have two 1080p cameras or one 4k camera?

If you are shooting weddings I think it will be better use a 4k camera, because new couples probably will have a 4k smarttv in the new home... They want to see the gorgeous 4k image with their happy faces, and all the beauty cerimony and celebration.

If you are doing corporate videos, probably the employees will see the video projected in a low resolution projector, 800x600, 1024x768, 1280x720 or, if lucky, a full hd projector. They will also see in the low resolution computer corporation monitors. The clients probably will see in computer monitors or maybe a DVD or BluRay disc, or a pendrive... Much better have a low datarate 1080p video compatible with all devices instead of a high datarate 4k file.

If you are talented enough to make a living from narrative short movies or feature films, and documentaries, so that is a big question: will 4k get more attention to my production? Will it worth dealing with 4k files in the timeline slowing the editing experience? How much people will see my movie in 4K? 2% or maybe 5%? And then another big question: will 4k help me to sell my movie in video on demand sites? May I upload a 30Mbps H265 or may I upload a 50 Mbps H264 file? Ohhh! a 12 Mbps 1080p would be easy to upload... And then you perceive that a good story in fullhd would be better than a bad story in 4k...

To be honest, whatching MadMen on NetFlix I do not care if the streaming is 480p, 720p or 1080p. The camera, the light, the photography, the talents are so good that the final resolution does not matter so much. Do you prefer MadMen in 1080p or House of Cards in 4K?

Is 4k the new 35mm and 1080p the new low budget 16mm? Or 1080p keep the 35mm position and 4k is a plus, a 70mm IMAX?

Is 4k more related to the luxury of the indie filmmaker who own a 4k tv and are salivating for a 4k camera just to shoot and see the world in 4k?

Come and see my new movie! A super hiper mega ultra premium special powerful production "THE 4K GIRL" Soon in all VOD sites and also in UHDBLURAY!

4k cameras can deliver a better 1080p image, editing in 4k and then doing a downscaled render, less aliasing, more resolution. Or to make it simple: you have all resolutions the world can ask you to have. But does it worth the effort? Is this choice more related to money? That is the question! Or that are the questionsssssss...

If I was a movie distributor I would say: do not worry about resolution, 720p is the minimum good enough.

Science, rules and beliefs Tue, 02 Oct 2012 19:47:24 -0600 Vitaliy_Kiselev 4795@/talks/discussions This discussion was created from comments split from: Big Bang=Big Wrong?.

Happy New Year to Everyone! Fri, 30 Dec 2016 13:02:45 -0700 Vitaliy_Kiselev 16252@/talks/discussions 2016 had been tough year both for camera industry and PV.

Yet we managed to made many good things:

So, if you did not still register - do it now!

If you registered already, but did not donated to lab - do it now!

Wish you Happy New 2017 Year!

snow drops on my screen!!!! Mon, 31 Dec 2012 10:47:03 -0700 Davidz 5627@/talks/discussions Suddenly, I see very small white dots moving across my screen from the right side to the left, with a slight downward drift - this is on ALL personal view screens - this started early this morning, after I visited a PV screen with shots taken with the GH3 of horses in snowing conditions. I do not experience this on any other sites or applications. I have cleaned my Registry, and run a full Norton scan, found 23 tracking cookies, all of which have been deleted. HELP!

Eos Pro Color Gh4 Tue, 27 Dec 2016 00:14:32 -0700 jclmedia 16236@/talks/discussions has anyone tried this yet? Looks pretty good to me, I got the Leeming Lut but dont really ever use it. if anyone has any before and after with the gh4 let me know.

Merry Chirstmas to all PV members Sun, 25 Dec 2016 04:12:25 -0700 Vitaliy_Kiselev 16229@/talks/discussions Wish you all the best today and in coming year!

Long Distance Cable Cam Motion Time-lapse Guide Sat, 24 Dec 2016 07:00:54 -0700 MikeLinn 16226@/talks/discussions

Christmas film shot with GH4 10bit Vlog Tue, 20 Dec 2016 04:56:11 -0700 Chris74 16210@/talks/discussions It's this time of the year when you have to ask yourself...have I been naughty or nice?

Merry Christmas!

4K Actioncam Showdown Mon, 19 Dec 2016 05:44:35 -0700 Vitaliy_Kiselev 16204@/talks/discussions