iPhone heating up when camera remains on

Question

bym OP

Created Jan ’18

Replies 2

Boosts 0

Views 1.1k

Participants 3

Hi,

We're running an app that requires the device to stay on for prolonged amount of time, all while keeping the camera turned on, and scanning for QR codes.

Can someone recommend a way to keep the device (our testing devices are iPhone 6s, iOS 11.2.2) from heating up?

Thanks

Boost

Answer 1

hxo OP

Jan ’18

if you decrease the resolution the camera is operating at, it will operate at a lower energy usage / not get so hot. Operating at ever higher resolutions, puts more pressure on the GPU to render those frames on screen... etc.

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Answer 2

corwin OP

Jan ’18

You can also try doing some testing with the new low power 4:3 binned modes.

A reply from Apple Staff here notes that as well as:

using a lower frame rate does always lower the power cost
but using a lower resolution does not always consume less power (e.g. some `AVCaptureDeviceFormats` are derived from the same underlying hardware sensor format, but with a hardware scaling applied)

You can also try using the Instruments Energy Log template as well as the new Energy Organizer in XCode 9.3 beta

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