💭 What is the equivalence of V2's `preset="photo"` in V3? about react-native-vision-camera HOT 4 CLOSED

Hey @jackylu0124, maybe you could see what kind of device and format you get on V2 and compare that to the ones you get on V3 (just by logging them). The format filter you use on V3 only maximises the resolution of the photo and video (preview). That is not the best format necessarily, it depends on your use case.

Futhermore, I think enabling HDR and setting qualityPrioritization for taking photos to quality could also help boost the results you see.

from react-native-vision-camera.

Hi @Dingenis, thank you for your reply and insight! Would you mind sharing how I can log/print out the device format when I am using preset="photo"? I have tried logging out the various props of the ref object that's passed into <Camera>, but I could not find the ones that are currently being used for the preset="photo" setting. Thanks for your help in advance!

from react-native-vision-camera.

Hi @jackylu0124, good point, it's hard to log that way. It seems that preset only does something on iOS and is determined by Apple, so it's a bit hard to see what it actually does. What you could try is to alter the source code to log the format that is being used.

After this line, you could add something like this:

guard let f = device.activeFormat else { return }
let formatDict = f.toDictionary()

do {
  let jsonData = try JSONSerialization.data(withJSONObject: formatDict, options: .prettyPrinted)
  let jsonText = String(data: jsonData, encoding: .ascii)
  ReactLogger.log(level: .info, message: "Format: \(jsonText)")
} catch { 
  ReactLogger.log(level: .error, message: "Error occured while serializing format to JSON")
}

I didn't test this code so there could be error in it, but I think it points you to the right direction. You could just add something like this in your node_modules/react-native-vision-camera/ios/CameraView+AVCaptureSession.swift

from react-native-vision-camera.

Hey - you could try to use useCameraFormat(device, Templates.Photo) for example. But by default, photo is already high quality.

from react-native-vision-camera.