This is the first database of its kind where the same scene is recorded by two cameras calibrated to less than one pixel, where:
the first camera records: 25 fps with 18 ms motion blur
the second camera records: 500 fps with 2 ms motion blur.
This achieves the desired data, but is absurdly over complicated when digital cameras and ffmpeg exist. As long as the camera doesn't have any missing light data (no shutter effect), you can simply blend groups of frames from the high fps video using a filter to get video identical to the low fps sample.