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Screen Wall
An architect wanted to present his creative design on a super-large screen. He bought a 2 GPU graphics card X2 with 4 display ports and connected them to 4 projectors. He expected that his ultra-high definition video/pictures were displayed on the super-large composited screens. Unfortunately, it did not work. Why? There was no driver in his graphics card to support span model. His design is only 2x2. How about 4*4 and more? The driver of graphics card looks hopeless.
Here is the Ladybug Mixer, its cutting-edge technology and powerful functions provide a solution for this professional video presentation.
Screen Wall is a matrix of screen with m rows and n columns. Dual screen is 1x2, trio screen is 1x3, and quad screen is 2x2. Generally we can use m*n uniform screens to construct a m*n screen wall. In the following paragraph 2x2 screen wall is used as an example to demonstrate the application of Ladybug Mixer.
To play video on 2x2 screen wall you need 4 display ports on video cards. When a graphics card with 4 ports supports span model, it can display any frames on 2x2 screen as whole.
However it is not always in the case. IN particular current SLI/CrossFire cards still have difficult to support more than 2x2 screnns in span model.
Ladybug Mixer provides a technology to suvdivide a video frame into m*n areas. Since Ladybug Mixer can work in multiple instances, we can launch 2x2 Ladybug Mixers simultaneously. Each Mixer is going to display a quart of frame area with suitable effect shader.
Here is the command line parameters of Ladybug Mixer.
| -adapter:# |
forces app to use this adapter # (fails if the adapter doesn't exist) |
| -windowless |
forces app to start windowless |
| -windowed |
forces app to start windowed |
| -fullscreen |
forces app to start full screen |
| -width:# |
forces app to use # for width. for full screen, it will pick the closest possible supported mode |
| -height:# |
forces app to use # for height. for full screen, it will pick the closest possible supported mode |
| -startx:# |
forces app to use # for the x coord of the window position for windowed mode |
| -starty:# |
forces app to use # for the y coord of the window position for windowed mode |
To play 2x2 video you need to select Quad Scrren 1 to 4 effects in shader list for each mixer. Then save each .nwm file as Screen1.nwm, ..., Screen4.nwm for example. The command line script for 2x2 videos looks like
"AppPath\Ladybug Mixer.exe" -adapter:0 -fullscreen "ConfigPath\Screen1.nwm"
"AppPath\Ladybug Mixer.exe" -adapter:1 -fullscreen "ConfigPath\Screen2.nwm"
"AppPath\Ladybug Mixer.exe" -adapter:3 -fullscreen "ConfigPath\Screen3.nwm"
"AppPath\Ladybug Mixer.exe" -adapter:4 -fullscreen "ConfigPath\Screen4.nwm"
The index number of an adapter represents different screen. -fullscreen parameter declares that the video will be displayed in fullscreen mode.
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