Troubleshooting

Steps to try

If you're experiencing build issues or runtime issues in VisionCamera, make sure you try the following before opening an issue:

iOS

Build Issues

1. Try building through Xcode instead of the commandline. The error panel should give you more information about any build errors.
2. Try cleaning and rebuilding everything:

   rm -rf package-lock.json && rm -rf yarn.lock && rm -rf node_modules
   rm -rf ios/Podfile.lock && rm -rf ios/Pods
   npm i  # or "yarn"
   cd ios && pod repo update && pod update && pod install
3. Check your minimum iOS version. VisionCamera requires a minimum iOS version of 12.4.
   1. Open your Podfile
   2. Make sure platform :ios is set to 12.4 or higher
   3. Make sure iOS Deployment Target is set to 12.4 or higher (IPHONEOS_DEPLOYMENT_TARGET in project.pbxproj)
4. Check your Swift version. VisionCamera requires a minimum Swift version of 5.2.
   1. Open project.pbxproj in a Text Editor
   2. If the LIBRARY_SEARCH_PATH value is set, make sure there is no explicit reference to Swift-5.0. If there is, remove it. See this StackOverflow answer.
   3. If the SWIFT_VERSION value is set, make sure it is set to 5.2 or higher.
5. Make sure you have created a Swift bridging header in your project.
   1. Open your project (.xcworkspace) in Xcode
   2. Press File > New > File (⌘+N)
   3. Select Swift File and press Next
   4. Choose whatever name you want, e.g. File.swift and press Create
   5. Press Create Bridging Header when promted.
6. Try building without Frame Processors. Set $VCDisableFrameProcessors = true in the top of your Podfile, and try rebuilding.

Runtime Issues

1. Check the logs in Xcode to find out more. In Xcode, go to View > Debug Area > Activate Console (⇧+⌘+C).
   • For errors without messages, there's often an error code attached. Look up the error code on osstatus.com to get more information about a specific error.
2. If your Frame Processor is not running, make sure you check the native Xcode logs. There is useful information about the Frame Processor Runtime that will tell you if something goes wrong.
3. If your Frame Processor is not running, make sure you are not using a remote JS debugger such as Google Chrome, since those don't work with JSI.
4. If you are experiencing black-screens, try removing all properties such as fps, videoHdr or format on the <Camera> component except for the required ones:

   <Camera device={device} isActive={true} style={{ width: 500, height: 500 }} />
5. Investigate the camera devices this phone has and make sure you're using a valid one. Look for properties such as pixelFormats, id, and hardwareLevel.

   const devices = Camera.getAvailableCameraDevices()
   console.log(JSON.stringify(d, null, 2))

Android

Build Issues

1. Try building through Android Studio instead of the commandline. The error panel should give you more information about any build errors.
2. Scroll up in the build output to make sure you're not missing any errors. Remember: "Build failed" is not an error message. Scroll further up.
3. Try cleaning and rebuilding everything:

   ./android/gradlew clean
   rm -rf android/.gradle android/.idea android/app/build android/build
   rm -rf package-lock.json yarn.lock node_modules
   yarn   # or `npm i`
4. Make sure you have installed the Android NDK.
5. Make sure your minimum SDK version is 26 or higher, and target SDK version is 33 or higher. See the example's build.gradle for reference.
   1. Open your build.gradle
   2. Set buildToolsVersion to 33.0.0 or higher
   3. Set compileSdkVersion to 33 or higher
   4. Set targetSdkVersion to 33 or higher
   5. Set minSdkVersion to 26 or higher
   6. Set ndkVersion to "23.1.7779620" or higher
   7. Update the Gradle Build-Tools version to 7.3.1 or higher:

      classpath("com.android.tools.build:gradle:7.3.1")
6. Make sure your Gradle Wrapper version is 7.5.1 or higher. In gradle-wrapper.properties, set:

   distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-all.zip
7. Try building without Frame Processors. Set VisionCamera_disableFrameProcessors = true in your gradle.properties, and try rebuilding.

Runtime Issues

1. Check the logs in Android Studio/Logcat to find out more. In Android Studio, go to View > Tool Windows > Logcat (⌘+6) or run adb logcat in Terminal. Android Logcat logs look like this:

   09:03:46 I ReactNativeJS: Running "App" with {"rootTag":11}
   09:03:47 I VisionCamera: Loading native C++ library...
   09:03:47 I VisionCamera: Installing JSI bindings...
   09:03:47 I VisionCamera: Finished installing JSI bindings!
   ...
2. If a camera device is not being returned by Camera.getAvailableCameraDevices(), make sure it is a Camera2 compatible device. See this section in the Android docs for more information.
3. If your Frame Processor is not running, make sure you check the native Android Studio/Logcat logs. There is useful information about the Frame Processor Runtime that will tell you if something goes wrong.
4. If your Frame Processor is not running, make sure you are not using a remote JS debugger such as Google Chrome, since those don't work with JSI.
5. If you are experiencing black-screens, try removing all properties such as fps, videoHdr or format on the <Camera> component except for the required ones:

   <Camera device={device} isActive={true} style={{ width: 500, height: 500 }} />
6. Investigate the camera devices this phone has and make sure you're using a valid one. Look for properties such as pixelFormats, id, and hardwareLevel.

   const devices = Camera.getAvailableCameraDevices()
   console.log(JSON.stringify(d, null, 2))

Issues

If nothing has helped so far, try browsing the GitHub issues. If your issue doesn't exist, create a new one. Make sure to fill out the template and include as many details as possible. Also try to reproduce the issue in the example app.