The iPhone, like many cameras without proper mechanical shutter to separate video frames, captures movies with a weird, floppy jello-like appearance. This problem is called the rolling shutter and, like most digital glitches, can be exploited to great effect. Take a look at this clip of a guitar’s vibrating strings, shot by Kyle Jones.
When you shoot video with the iPhone, its CMOS sensor captures images by scanning one line of the frame at a time. If anything is moving fast, then it will be in a different place as each line is captured. This can lead to weird distortions in still photos, and to rather odd effects in video, just like Kyle’s guitar strings.
Interestingly, Kyle — a motion graphics designer and animator — wasn’t expecting these wobbly slo-mo strings when he shot the video. He just thought it would be cool to test “what it was like filming from inside my guitar.” Turns out it was a lot cooler than anyone thought.