PetaPixel

Neat Camera Trick Makes Falling Water Appear to Float Upwards

A couple weeks ago we shared an interesting video in which a speaker and Canon 5D Mark II’s frame rate were used to make water appear to be frozen in mid-air. This new video by YouTube user Brusspup takes the idea to the next level by making the water appear to travel upwards. He explains:

Fill a bucket full of water and place it about 5 feet off the ground. Place a subwoofer about 1 foot lower than the bucket. Run a plastic tube from the top bucket down in front of the subwoofer. Tape the tube to the front of the speaker. Then aim the end of the tube to an empty bucket on the floor. Get the water flowing from the top bucket. Now just generate a 24 hz sine wave and set your camera to 24 fps and watch the magic happen. Basically your cameras frame rate is synced up with the rate of the vibrations of the water so it appears to be frozen or still. Now if you play a 23 hz sine wave your frame rate will be off just a little compared to the sine wave causing the water to “move backward” or so as it appears. You can play a 25 hz sine wave and cause the water to move slowly forward.

This experiment has become quite a trend as of late — this particular video has been viewed over a million times in less than a week.


 
  • http://profile.yahoo.com/6A7UCUBXC7CLJVTRW6EWLNZRI4 Dee

    as Emily explained I can’t believe that someone able to profit $4824 in 4 weeks on the internet. have you read this web site !!! Gotoonlinejob.blogspot.in

  • Dorian

     Get a life!

  • http://twitter.com/Basbeeky Bas ter Beek

    This comment is kinda ironic, since that million views for the video above made a few thousands of dollars aswell for the uploader ;) 
    Nontheless: spam

  • Mitigated Cad

    Nice! Excuse me, but I have to take a pee.

  • Jim McNair

    If the film had been shown “upside-down”, and still going “backwards”, it would have looked like the water was flowing into the pipe. There’s still fun to be had with this technique.

  • Gunmanxxx

    ok, so how do we know it’s 24hrz, etc.?

  • Heendoongie

    Peeing will never be the same again…

  • Bjamri

    I don’t believe this. Even if the water would rise, how could it find the tube that dropped it? This is just plain old revere pla-back.

  • Pshaw, tisn’t magic

     Dude, it’s NOT flowing backwards. “Camera trick.”

  • Thalion

    Not real. Sorry, this could be done with stroboscopic photographic techniques to “freeze” flowing water, but it wouldn’t quite look like this. This is all post editing illusions. I don’t care how well you can sync the frame rate with the hertz, all that would assure is the tube of water fluctuates at approximately the same rate. There is too much dynamic chaos to expect the water droplets to be in the exact same spots every time they sheer off from the cohesive stream. Which make the even easier conclusion, the flowing backwards is indeed, as others have said, just playback. I mean, look at the way the water moves.

  • Ben

    It seems a legit vid, based on my limited understanding of post processing techniques on video and how it appears. But I am also a little confused as to why matching the frequency of water through soundwaves causes drops to be in exactly the same place every cycle. I can understand it with helicopter blades – it’s very clear that they pass through the same point every rotation … but I didn’t think you can control the location of drops through frequency … I mean, it doesn’t make sense … or does it ?