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OEV: the easy way to create Lightpainting Videos

NEW VERSION 1.3.1 RELEASED WITH HUGE PERFORMANCE IMPROVEMENT

latest version: OEV 1.3.1 (free jar download)

New features:
improved performance when using brightness comparision function 2, the recommended default (~11x faster)

OEV is a small Java programm I wrote to make special lightpainting videos.
In my latest videos Munich - City of Lights and Oktoberfest 2013 Lightpainting Timelapse you can see some examples of what you can creat with it.

Which effect do you want to create?

Choose and read my 5-step manual!

1. Select source folder: It has to contain the input files, named like "1.png", "2.png",...

2. Select result folder: The calculated image will be saved as "resultIMG.png" ; and a logFile "Log.txt"

3. Set Mode to "sum Image"

4. type in your "amount of input frames"

5. Click on start! When the progress bar shows 100% the software has finished.

1. Select source folder: It has to contain the input files (= footage's frames), named like "1.png", "2.png",...

2. Select result folder: The calculated images will be saved as "resultIMG1.png", "resultIMG2.png",... ; and a logFile "Log.txt"

3. Set Mode to "Video"

4. type in your "amount of input frames"

5. Click on start! When the progress bar shows 100% the software has finished.

1. Select source folder: It has to contain the input files (= footage's frames), named like "1.png", "2.png",...

2. Select result folder: The calculated images will be saved as "resultIMG1.png", "resultIMG2.png",... ; and a logFile "Log.txt"

3. Set Mode to "Special Video"

4. type in your "amount of input frames"

5. choose an addition amount. It determines how long the lights will look like in your video.

6. Click on start! When the progress bar shows 100% the software has finished.

When shooting for Lightpainting videos

When you use this software with usual footage shot e.g. with a DSLR, you will get more or less huge gaps in the light lines. The reason for that is that the camera does not save the whole scene. Normally you shoot at 25 fps, with an maximal exposure time of about 1/33 sec. So in one second the shutter is not open for (in sum) one second, but 0.75 sec. The 0.25 less are the gaps missing in the resulting video.
To prevent these gaps I use magiclantern firmware on my Canon DSLR. Magiclantern allow "gapless recording" when using slow framerates. At 6 fps it is possible to shoot with nearly 1/6 sec. exposure time, this is the fastest framerate possible. (Furthermore I can recommend magiclantern cause it has lots of really cool features ;) ).

How I make *.png files out of the camera's files

When shooting in camera's video mode I put the files into Adobe Premiere, where you can directly export it as a PNG sequence. To rename the files into the needed "1.png","2.png", ... ,"n.png" scheme I use Joe.
From Adobe Lightroom exporting directly to *.png is basically not possible, for that I use the PlugIn Magic Export.

If you still got any question, or created a fantastic lightpainting video, please let me know. Contact information can be found at the top of this page :)