How did they film this scene with strobe lights?

[MichaelChang]

<p>I'd normally post this in the video forum but thought more people whom might know the answer frequent this forum, so here's the question:</p>

<p>In the commercial for Kenzo World, Margaret Qualley dances in the Dorothy Chandler Pavilion in LA directed by Spike Jonze in which there is a scene lit by strobe lights for about 2 seconds @ 2:25. <br>

<a href="https://www.youtube.com/watch?v=ABz2m0olmPg">https://www.youtube.com/watch?v=ABz2m0olmPg - @2:25</a></p>

<p>It first appeared to be a real strobe light to me, but the more I looked at the details, the more it appears to be a post processed effect since the camera's shutter will need to be dramatically altered in real time that didn't seem likely to me. </p>

<p>Any thoughts? </p>

[Ed_Ingold]

<p>Strobe lights will record as a flash on CCD cameras, which sample the entire frame at once. They will appear as diagonal slashes on most CMOS sensors, which sample line by line. Some newer CMOS sensors, mainly Super-35, are touted to use total sampling.</p>

<p>In this video, the effects were probably generated in post.</p>

[Tim_Lookingbill]

<p>Any chance the camera used employed some type of electronic shutter that records strobes differently than mechanical shutters?... http://www.juzaphoto.com/article.php?l=en&t=mechanical_and_electronic_shutter</p>

[Ed_Ingold]

<p>I know of no current digital video camera that uses a mechanical shutter. They are electronic. What I described above is the way electronic shutters work on CCD v CMOS sensors. The banding effect of strobes in video is due to the sequential operation of electronic shutters in CMOS devices, as opposed to global operation in CCDs and some newer CMOS sensors (just announced last week).</p>

[thomas_k.]

<p>Very interesting video, I do not know about your strobe question but actress did great job.</p>