New projection Project, Help plz! ty

[Stoldal]

For the next musical I am working on,the director wants to use three large projection screens. I attached a picture of a rough idea of how the screens are going to be. The director want to do two things.
1)project one image a crossed all three screens
Both Pictures and videos

2)Use light to project even washes of color on the screens. (note: that i was planing to use LCD panels to project the colors)
I am normal the lighting director, but I have done some projection for other plays I have worked on. I have also done some tech work for one of the local news stations.

I have about $500 to do this, I have the projectors, and the screen are going to be built by a parent using Trapeze Plus Spandex http://www.iweiss.com/stage/fabric/specialty.html
These are going to be larger then average screens.
Tell me what other information you guy need.
Thank you for your help!!

[wolf825]

Originally Posted by Mstoldal

For the next musical I am working on,the director wants to use three large projection screens. I attached a picture of a rough idea of how the screens are going to be. The director want to do two things.
1)project one image a crossed all three screens
Both Pictures and videos
2)Use light to project even washes of color on the screens. (note: that i was planing to use LCD panels to project the colors)
I am normal the lighting director, but I have done some projection for other plays I have worked on. I have also done some tech work for one of the local news stations.
I have about $500 to do this, I have the projectors, and the screen are going to be built by a parent using Trapeze Plus Spandex http://www.iweiss.com/stage/fabric/specialty.html
These are going to be larger then average screens.
Tell me what other information you guy need.
Thank you for your help!!

so.....what is your question that you need help or ideas for? You say you have the projectors..the screens are being built.. Is it lighting the screens? is it making the screens? what size are they?

?

I would front project the images and rear project the colored light..or vica versa....it will make controlling either (well--dimming the color wash) and not washing out the image a bit more 'manageable'..not much but a bit more...IMO.....

-w

[Stoldal]

Ok, the problem is how to project one image across all three screens. The screens are at three different angles.

[SHARYNF]

We get this question alot

Depending on your setup, one way is to use a PC with a graphics card that can support three monitors http://www.eventdv.net/Articles/Read...rticleID=37848

http://www.tomshardware.com/forum/18...-span-displays

You then need to split your desktop across the three outputs, use the VGA/DVI connection and run your video across the three monitors. In theory this should work have to say I have not personally done this specific configuration.
Since you are dramatically magnifying the image, usually it is recommended to have a high resolution image to start with

Couple of points to keep in mind
The matrox trypplehead2go, attaches to the vga output of your system, they have two versions analog and digital, if your projectors are analog, you need to get the analog version. At the same time you need to make sure your video card on your player will support the triple resolution you are looking for, Check out

http://www.matrox.com/graphics/en/co...s/home.php#dws

You need to look at the resolution of the three projectors (need to match) and then make sure your video card supports 3x the horizontal resoulution, also you need to make sure that your video playback application will support this resolution.

Potential problems is there is no edge blending, but also unless you use a dual video out card on your pc you are going to have the pc desktop also be visible. As I said I have not had the the time to test this all out, but it is something I am looking at as more and more people do want to split stuff across multiple screens

Outside of your budget and Mac only there is a product called ProVIdeo Player
http://www.renewedvision.com/pvp.php

Worship systems are starting to use this feature, and so prices are starting to come down
This approach gives the most flexibility but has higher cost

There is also a product called Arkaos, which offers another alternative
http://www.arkaos.net/software/vj_description.php They have a free trial that you can down load and works for 21 days with no limitations

Another approach, get three identical dvd players, make up your own three custom dvd's splitting the feed into three parts, and use an IR remote to start stop the three dvd players

In general getting it all to work perfectly is a bit trickey in all cases especially if you don't make your video with the idea of spreading it across three projectors from the start

Sharyn

[museav]

I'm not clear on just what you are trying to do with that arrangement. My first thought was that the video would be one projector projecting over all three screens, but you mentioned having projectors plural. And while it may just be the sketch, the screens shown both do not appear to be a standard format and they seem to overlap. It's also not clear what is happening between the screens or if that might result in some issues regarding light coming from or projecting through those gaps. So can you explain a little more about what you are trying to do and what you were planning to do to accomplish this? Are you using one projector or three? Where will the screens be located and might they be affected by other lighting?

There could be some challenges such as how you get the projected image and lighting to fit the screens (or if that matters) and how you get the separation between images that the sketch reflects. If you start trying to do things like use projectors on their sides to get the vertical format shown this not only might not be something the projectors support, but it could also greatly complicate the video processing required.

[Stoldal]

Thanks for the help guys. What we are trying to do is, i have the three screens, the director wants to project different landscapes, and buildings, on the screen. He want the gaps between the screens. I am thinking that i have to use three projectors, one for each screen.

I just don't know what the easiest way to project the one image on all three screens. The production is in 5 months, so if this get to costly or to complex we may try a different idea.

I hope what i am trying to do is clear, if it is not i will try clarifying it.

Thanks

[icewolf08]

Short of using a true media server like the HES Catalyst or PRG's M•Box your best bet is probably a multiple output graphics card as Sharynf said, or a computer with multiple graphics cards.

Next, screen size, if you get longer than 16:9 proportions you may find that your projectors can't produce an image in the shape you need. This means that you will either need a digital mask around your images which will leave you with "video black" bleed, or you need to create a physical mask so that the images fit on the screens correctly. Here is an example of an odd shape projection I did for the musical "Violet."



The projection surface you can see without a projection in the third image. I created a digital mask with some feathering that we aligned to the "screen" and then dropped the images and some video behind. This was done with one projector, and since the aspect ratio of the "screen" was no 4:3 which is the supported aspect of our projectors the actual image size significantly larger than the "screen" then masked down.

A media server or the multi monitor technique will allow you to align multiple projectors and then have a single image span across. For that you may need physical masks to eliminate bleed from one projector onto a different screen if your projectors don't support non standard aspect ratios.

[museav]

So are you wanting one image spread across all three screens or the same image on each screen (the same image three times)?

Since the screens are together and appear to even overlap, then if it is one image across the three screens and you want the gaps, a single projector probably makes more sense. Much simpler and the resulting image area looks like it would more closely match a projector's native format, which could be 5:4, 15:9 or 16:9 but is most likely 4:3. One potential factor with this approach would be the projector output and what kind of image you get with the screen size, screen material and other lighting hitting on the screens.

If you need to use one projector per screen to get sufficient image quality, then a solution like Sharyn's might be a better option.

If you do not digitally or physically mask the image as icewolf suggested then since the image would be projecting through the gaps you'd want to be sure there is nothing behind the screen that will reflect the image.

If you want the same image on all three screens simultaneously then you would need three projectors and to get the image areas shown you would probably need to both physically mask the projected image and consider that image format in selecting and putting together your media.

[Stoldal]

I need to project one image acrossed all three screens. I think that using one projector will work. I think that i will use 4:3. Now i need to find a projector that will have a high enough output. the projectors that i have only has 1000lumes. What do you think will be a high enought output. It is going to be a large screen, lets say 15'x15'. Also, what is the best cable for me to use, i know it should be a VGA cable, or DVI, but both of those cable are very costly for long cable runs. The cable run is going to be 50'+.

[SHARYNF]

Issue of deciding the lumens needed is going to be the amount of ambient light. in addition remember to get an image of that size you are looking at typically quite a long distance from the screen to projector, it will depend upon the lens of course I am assuming you are looking at front projection?

vga works best but you need to see how image is generated, if the image is just video playback then composite or s video will work best since you will not have to have the image re scaled

Sharyn