Some devices with good processor and other components can't handle application that is working good on slower devices. It"s possible that higher camera resolution requires much more power? If that is case can I lower resolution for camera playback?
App is slow of some devices
You can adjust the camera mode from the Configuration in Unity -> Camera Device Mode or via code as described here https://library.vuforia.com/content/vuforia-library/en/reference/unity/classVuforia_1_1CameraDevice.html#af6c196d8948b774c4d147cf9eab1a900
This being said you cannot adjust directly the resolution, you can adjust only the mode, below are the options + info.
MODE_DEFAULT -> Best compromise between speed and quality.
MODE_OPTIMIZE_SPEED -> Optimize for speed. Quality of the video background could suffer.
MODE_OPTIMIZE_QUALITY -> Optimize for quality. Application performance could go down.
In order to understand your concern better, could you please provide more details about the phones with good procesor and describe the behavior you are currently experiencing?
Vuforia Engine Support
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