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The replay looks choppy

If the playback on the iPad starts to skip, stutter, or feel sluggish — especially deep into a long practice in a warm gym — you're probably running into thermal throttling. iPads slow themselves down to avoid overheating, and continuous video capture is one of the rare workloads that pushes them hard enough to trigger it.

What's happening

RepRecap is doing real work on the iPad's video pipeline:

  • Capturing live frames from the camera, every 30th of a second.
  • Encoding those frames into a video buffer.
  • Reading from the buffer at a delay and pushing those frames to the display.
  • All while the screen brightness is up and the iPad is plugged in (or not).

In an air-conditioned classroom, this isn't a problem. In a summer gym with no air conditioning, an iPad on a tripod with no shade, recording for 90 minutes — the iPad warms up enough to throttle.

What RepRecap does automatically

When the iPad's temperature crosses a threshold, RepRecap automatically drops capture quality from 1080p30 to 720p30. You should see a brief banner on screen ("Capture quality reduced to keep the iPad cool"). The drop in quality is visible, but the replay stays smooth.

If the iPad continues to heat up past that, iOS itself will pause the camera. RepRecap shows a "Camera paused — iPad is too warm" message. Capture resumes automatically once the temperature drops.

What you can do

In order of how much effort they take:

Plug in to power. Counter-intuitive, but plugging in to a wall charger usually helps the iPad stay cooler than running on battery, because the battery isn't being drained (heat from discharge plus heat from compute = much warmer).

Drop screen brightness. The display is one of the hottest components. If the gym is well-lit, you can drop the iPad to ~50% brightness without affecting visibility. Athletes are watching the playback content, not subtle screen detail.

Move the iPad out of direct sun. A few minutes of direct sunlight on the back of an iPad raises its temperature noticeably. Even partial shade helps.

Add airflow. A small USB fan pointed at the back of the iPad (or even just a tripod placement near a gym fan) keeps things much cooler.

Take a break. If a drill is wrapping up anyway, Stop the recording for 5–10 minutes between drills. Capture restarts cool.

Switch to a cooler iPad model. M-series iPads (M1, M2, M3, M4) have substantially more thermal headroom than the A14 floor. If you're using a 2022 iPad and routinely seeing throttling, an iPad Air or iPad Pro will throttle less in the same gym.

What it's not

If the replay is choppy from the moment you start the camera — not building up over time — that's probably not thermal. More likely:

  • The iPad is low on storage. Free up a few GB and restart.
  • Background apps are heavy. Force-quit everything else and restart RepRecap.
  • The iPad is older than the supported floor. RepRecap supports iPad 2022+ and iPhone 12+; earlier models will struggle.

Last updated 2026-05-11