Digital file size for projection

However we sometimes encounter venues with widescreen projectors; either x or x pixels. If you don't know the resolution of the projector, we recommend sizing images to fit the highest projector resolution you are likely to find. So horizontal images should be pixels across, and vertical images pixels high. Square images pixels square. In any of these cases, a little larger is fine. At the time of writing , 4K projectors are occasionally used.

These provide much larger dimensions. If you know your images will be projected on a 4K projector, find out the native resolution and prepare images accordingly. Problems can arise if images are very large, which can slow down the slideshow software. When you are saving images for projection, use JPEG format.

This provides the best compromise of size and quality. If you are familiar with colour management, we recommend saving images in the sRGB colour space. Most projectors have an sRGB preset which should be a close match for this space.

Some photographers like to put borders round their images when preparing them for projection. If you want to show your images at their strongest, this border should be black. We advise against using white borders. While white might look good on your computer screen, many projectors project a very bright white, which can dazzle viewers and make the images harder to look at.

If you want that effect or need a visible border ie not black , we suggest trying a mid grey. Finish recording action. I just bought an Epson EX digiatl projector, about dollars,. I'm a painter and wanted to project sketches that I took with my iphone camera.

I downloaded on my mac onto a USb card and plugged it onto the projector. But in a few days I sent the thing back because i was having so many problems with the projector either choosing tp show some images, or not show some images and I could not figure out what i was doing wrong. If I get another projector will it do the same thing? Any one have any ideas? I'm ot very techy. You must log in or sign up to reply here.

Show Ignored Content. Share This Page Tweet. Your name or email address: Password: Forgot your password? Now they can load the movies onto a central server, and serve it up to each projector based on need, along with pre-show ads and trailers. Everything can be fully automated now. Digital projectors are also capable of showing movies in 4K resolution or higher.

Contrary to popular belief, digital movies are NOT run off a DVD or Blu-ray, because the amount of data for a full resolution film with completely uncompressed audio is far too large to be held on a single disc.

Sorry if my answer is long winded, but it's a part of the industry I miss and could provide a good amount of detail on to really flesh out any questions you may have regarding the old way things were done. I'd be happy to flesh out any bits anyone has questions on, though I can't speak too much about the current state of digital, as it was, "After my time. A DCP consists of a bundle of "media exchange format" files.

Digital Cinema Packages do not use temporal compression the way formats like BluRay do, and as such, are therefore higher quality. They also usually have a maxresolution of or pixels horizontally. Theoretically this allows individual pixels to be visible when close to a screen , but in practice, digital projection offers far superior image quality due to the absence of imperfections such as dust and scratches which are commonplace on movie film prints.

By and large digital projectors still use Xenon Lamps like their more recent film predecessors, but there is a move towards using laser light as the light source in the future with the intention of reducing the cost of lamps.

As well as providing superior quality, distribution costs are greatly reduced, and because digital cinema packages are strongly encrypted all the way to an audited tamper-proof decoder block inside a digital projector piracy is minimised. Of course the huge savings that digital brings over film are not passed on from the studios to the cinemas or the cinema-goers who now pay higher ticket prices than ever before. No, film projection is a thing of past now.

Not only in US, but in most of the countries around the world, the projection system has gone digital with the age. Nowadays, most of the theatre chains use digital projectors and movies are distributed to them in magnetic hard drives. Primary reason behind this is transition cost. While making and distributing hundreds and thousands of reels cost a good chunk, Hard drives cost merely a fraction of it and distribution is easy as well. Moreover, with film projection, there was always a master copy and other reels were copied from it and even with advanced techniques the quality of film suffered in a very minor way though , there would always be a haggle in the market over getting a higher standard print.

With digital prints, it's a game of ones and zeroes and two prints can be an exact copy of each other. By today, it's rare to find a theatre running on film projection, not because they have become obsolete quality but because people stopped distributing films.

Stereo is handled by having twice as many images one for each eye. High frame-rates also require more pictures, leaving fewer bytes for each picture. JPEG is single-image codec, not taking advantage of any similarity between frames of the movie.

High efficiency quality per bitrate video codecs such as h. JPEG video is like a normal codec operating in I-frame only mode. Early codecs before h. DivX had a bad reputation for quality decaying after an I-frame, because decode wasn't standardized, and CPUs were slow.

But modern encoders model have a bit-exact model of what the decoded pictures will be, so they can use that when doing motion search and encoding the residual left over after subtracting a similar-looking region from the previous picture. This essentially avoids quality decaying until the next I-frame, as long as there's enough bitrate for the encoder to encode each frame accurately.

In theory, bit h. At very high bitrates, the advantages of inter-frame compression are smaller : Looking "mostly like" a previous frame isn't good enough, and the difference between encoding an residual in a lot of detail vs. But the video-production industry has a bias against inter-compression codecs for high quality, probably because stuff like h. Sign up to join this community. The best answers are voted up and rise to the top.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. What format do movie theaters now use? Ask Question. Asked 7 years, 6 months ago. Active 2 years, 11 months ago. Viewed k times. Improve this question. MattD Once, I was in a movie theatre and it was going to show The Hobbit. The first five minutes of Cloudy with a Chance of Meatballs 2 showed.

So, digital? Add a comment. Active Oldest Votes. Improve this answer. CableWorm 58 3 3 bronze badges. Oooo Downvote! Drive by or explanation? Wasn't me, but you do take a while to get to the point, with a lot of rambling about adverts. Not to say that advertising is NOT a major revenue stream, but your comparison is not apples-to-apples: You compare the box office revenue for ONE movie, to the total revenue that a 5-screen theater would collect from advertising in a year.

To be fair, you'd have to multiply the one-move revenue by the number of movies they show per screen in a year, times the number of screens. Actually it would probably be simpler to find the average weekly box offfice revenue times 52 weeks per year times number of screens, but whatever. Well, I compare the potential earnings of one movie with the potential being achieved , and compare it to the guaranteed revenue through advertising, to demonstrate the reason advertisement is so prevalent.

You'd need three amazing films in a year to match the potential of your guaranteed ad income. It's not dismissing the takings of every other film, it's just showing some perspective.

Former projectionist here, let me weigh in on what's happened in the last 7 to 8 years. Alright, so now that we have that out of the way, I'll tell you what I know.