"One Frame Man" is what the fandom called One Punch Man Season 2. I measured motion across all 36 episodes as per-shot pixel flux with OpenCV, and Season 2 moves the most.

Season 2 moves the most, with median episode motion around 6.0

The season people called a slideshow is the season that moves the most, so pixel flux is not measuring the complaint.

  • Season 2: median episode motion around 6.0. Season 1: about 5.6.
  • Season 3 is lowest at about 4.9 and the most variable, with episode averages from 2.7 to 8.0.
From left: a camera pan across one painting, a held drawing under screen shake, and drawn hand and face movement (S2E05 12:05, S1E12 12:27, S1E07 20:10). The bottom row shows what changed since the previous frame.

Cheap ways to fake movement score high

Pixel flux counts how many pixels change between frames, whatever the cause.

  • A camera pan across a painted background scores high. So does a held drawing under a shaking effect layer.
  • Both move many pixels with little drawn animation. The audience means how much was drawn.
  • The dataset write-up goes through the confounds in full.
Left, drawing on twos (S3E09 19:07); right, one drawing held inside a moving cut (S1E09 18:42). Bottom strip: one bar per frame, grey where the frame repeats the one before.

A held drawing scores as no motion, planned or cheap

A held drawing changes no pixels, so a planned pause and a cost-saving hold get the same score.

  • The "one frame" claim is about holds inside action cuts.
  • On twos, every second frame repeats the drawing before it.
  • Across all 36 episodes, Season 2 still has the highest median motion.

By Season 3 the chat is grading the production

The change the audience felt shows up in what they typed, and it is the result I find most interesting.

  • By Season 3 the words distinctive to the chat are frame, animation, frames, filter and png.
  • The same season has the lowest median motion, about 4.9.