Behavior in Version 2.3 and earlier:
Lighting is the biggest challenge when recording inside. Because indoor lighting is typically powered by Alternating Current (AC) the fluctuations in light intensity can be seen when using Motion Amplification®. One of the symptoms is found in the article: My recording flashes bright and dim during analysis when I move the Motion Amplification® slider. The Iris M™ System contains helpful tools to automate selecting compatible recording rates. Using the selections from the "Acquisition Mode," "Lighting," "Framerate (fps)" and "Fmax (Hz)" boxes under the "Camera Properties" section of the RDI Technologies™ Acquisition software will configure your recording for compatible frame rates giving you the best quality videos at all Motion Amplification® settings.
Be aware, we have even seen flash rates at frequencies "around" line frequency. So, your filters may have to be adjusted slightly to eliminate the actual frequency.
See the attached videos for locating and using these controls.