Flutter doesn't recognise external USB camera

[hamid-yousefi]

Use case

Not recognizing external USB camera

Proposal

Hi, I want to use my external usb camera but flutter does not recognize it, it just finds my rear and my front cameras. Please take a look at it .

Thank you

[haamaanaa]

Hi! Is there plans to add support for external cameras in next camera library version?

#31225 does not answer this directly....

[AshwinPrabhuB]

Is external camera access a vendor/device dependant capability?

[moeiscool]

this and SD card support would be golden 🙏

[crabio]

Hi!
Do you have any updates about this feature?
I need this for my app and one way it is Flutter + Kotlin code for Android

[mat-his]

Take a look at this plugin, I haven't tested it yet, but it may help.

https://pub.dev/packages/flir_plugin

[Chance212]

case CameraLensDirection.back:
return Icons.camera_rear;
case CameraLensDirection.front:
return Icons.camera_front;
case CameraLensDirection.external:
return Icons.camera;

/// External camera which may not be mounted to the device.

I see there is a case for external but is it working i tried with different apps for USB camera and it didnt for me :( any luck someone else ?

[Dairyo-Gokan]

Which target device are you talking about?
If you're talking about the device with Android 10 (Q), did you see the link below?

Still unable to get USB Video device permission on Android 10
https://issuetracker.google.com/issues/145082934

[mat-his]

I'm currently trying to design a Flutter plugin for controlling external UVC cameras (webcams), using the Android libraries described in this article : external usb cameras

Nevertheless, one should keep in mind that even on native Android the use of external USB cameras is quite limited.

[Taverz]

Please, help!!
Do you need to urgently solve the problem, even if it is some kind of temporary solution or workaround?
Is it possible to somehow hardcode certain parameters or data to make the plugin work?

Device Feature:

• Android 12
• Android SDK 32
• Does not have cameras
• Lots of USB ports

Android Studio from M1-Apple

flutter doctor -v

flutter doctor -v [✓] Flutter (Channel stable, 3.7.1, on macOS 13.2 22D49 darwin-arm64, locale ru-RU) • Flutter version 3.7.1 on channel stable at /Users/User/Documents/devflutter/flutter • Upstream repository https://github.com/flutter/flutter.git • Framework revision 7048ed9 (2 weeks ago), 2023-02-01 09:07:31 -0800 • Engine revision 800594f1f4 • Dart version 2.19.1 • DevTools version 2.20.1

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
• Android SDK at /Users/User/Library/Android/sdk
• Platform android-33, build-tools 30.0.3
• ANDROID_HOME = /Users/User/Library/Android/sdk
• Java binary at: /Users/User/.sdkman/candidates/java/current/bin/java
• Java version OpenJDK Runtime Environment Zulu11.52+13-CA (build 11.0.13+8-LTS)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 14B47b
• CocoaPods version 1.11.3

[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[!] Android Studio (version 2022.1)
• Android Studio at /Applications/Android Studio.app/Contents
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🔨 https://plugins.jetbrains.com/plugin/9212-flutter
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🔨 https://plugins.jetbrains.com/plugin/6351-dart
✗ Unable to find bundled Java version.
• Try updating or re-installing Android Studio.

[✓] VS Code (version 1.75.0)
• VS Code at /Users/User/Documents/Visual Studio Code.app/Contents
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[✓] Connected device (3 available)
• rk3588 (mobile) • ISCH6N81SS • android-arm64 • Android 12 (API 32)
• macOS (desktop) • macos • darwin-arm64 • macOS 13.2 22D49 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 109.0.5414.119

[✓] HTTP Host Availability
• All required HTTP hosts are available

! Doctor found issues in 1 category.

1. I connected an external camera via USB.
2. I checked that the camera is working: I went into the system application camera, camera !! works.
3. Tried a simple android.hardware.camera2 example (run android code): !! works (external camera success): the camera sees and successfully displays the image from it.
4. I took the last sample code from branch=main https://github.com/flutter/plugins/tree/main/packages/camera/camera
5. Launched as Flutter debug
6. Application started successfully
7. Clicked on select EXTERNAL camera (connect via USB).
8. ERRORE : !!!!!!! android.media.CamcorderProfile.getAll // android.media.CamcorderProfile.native_get_camcorder_profiles

(I tried to change the java code but without success)

Log errore

Launching lib/main.dart on rk3588 in debug mode...
✓ Built build/app/outputs/flutter-apk/app-debug.apk.
Connecting to VM Service at ws://127.0.0.1:56408/dxxd9TAdu50=/ws
I/CameraManagerGlobal(16481): Connecting to camera service
E/MediaProfiles(16481): The given camcorder profile camera 101 quality 0 is not found

After tap select camera EXTERNAL
-> ->
E/MethodChannel#plugins.flutter.io/camera(16481): Failed to handle method call
E/MethodChannel#plugins.flutter.io/camera(16481): java.lang.RuntimeException: Error retrieving camcorder profile params
E/MethodChannel#plugins.flutter.io/camera(16481): at android.media.CamcorderProfile.native_get_camcorder_profiles(Native Method)
E/MethodChannel#plugins.flutter.io/camera(16481): at android.media.CamcorderProfile.getAll(CamcorderProfile.java:605)
E/MethodChannel#plugins.flutter.io/camera(16481): at io.flutter.plugins.camera.features.resolution.ResolutionFeature.getBestAvailableCamcorderProfileForResolutionPreset(ResolutionFeature.java:231)
E/MethodChannel#plugins.flutter.io/camera(16481): at io.flutter.plugins.camera.features.resolution.ResolutionFeature.configureResolution(ResolutionFeature.java:278)
E/MethodChannel#plugins.flutter.io/camera(16481): at io.flutter.plugins.camera.features.resolution.ResolutionFeature.(ResolutionFeature.java:53)
E/MethodChannel#plugins.flutter.io/camera(16481): at io.flutter.plugins.camera.features.CameraFeatureFactoryImpl.createResolutionFeature(CameraFeatureFactoryImpl.java:58)
E/MethodChannel#plugins.flutter.io/camera(16481): at io.flutter.plugins.camera.features.CameraFeatures.init(CameraFeatures.java:71)
E/MethodChannel#plugins.flutter.io/camera(16481): at io.flutter.plugins.camera.Camera.(Camera.java:215)
E/MethodChannel#plugins.flutter.io/camera(16481): at io.flutter.plugins.camera.MethodCallHandlerImpl.instantiateCamera(MethodCallHandlerImpl.java:385)
E/MethodChannel#plugins.flutter.io/camera(16481): at io.flutter.plugins.camera.MethodC

[Taverz]

When testing the latest version of the example, on a tablet without cameras, I attached an external camera. The external ka recognizes. @hamid811394

[Taverz]

android 12 external camera recognizes

[Taverz]

!!!!!!!!!!!!!!!!! After it recognizes the camera, the application works with it and crashes.

[Taverz]

#120776. #120776

[Taverz]

[Taverz]

Solution errore: retrieving camcorder profile params.

This file redacted:

• MediaRecorderBuilder.java
• Camera.java.
• ResolutionFeature.java.

Delete field:

• CamcorderProfile.
• EncoderProfiles.

Method editing.

  public MediaRecorder build() throws IOException, NullPointerException, IndexOutOfBoundsException {
    MediaRecorder mediaRecorder = recorderFactory.makeMediaRecorder();

    // There's a fixed order that mediaRecorder expects. Only change these functions accordingly.
    // You can find the specifics here: https://developer.android.com/reference/android/media/MediaRecorder.
    if (enableAudio) mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);

    if (Build.VERSION.SDK_INT >= 31) {
//      EncoderProfiles.VideoProfile videoProfile = encoderProfiles.getVideoProfiles().get(0);
//      EncoderProfiles.AudioProfile audioProfile = encoderProfiles.getAudioProfiles().get(0);
      String vvvww =" WIN == " ;
//      vvvww = vvvww + " getRecommendedFileFormat "+ encoderProfiles.getRecommendedFileFormat() ;
//      if (enableAudio) {
//        vvvww = vvvww + " getCodec "+ audioProfile.getCodec();
//        vvvww = vvvww + " getBitrate "+ audioProfile.getBitrate();
//        vvvww = vvvww + " getSampleRate "+ audioProfile.getSampleRate();
//      }
//      vvvww = vvvww + " videoProfile.getCodec "+ videoProfile.getCodec();
//      vvvww = vvvww + " videoProfile.getBitrate "+ videoProfile.getBitrate();
//      vvvww = vvvww + " videoProfile.getFrameRate "+ videoProfile.getFrameRate();
//
//      vvvww = vvvww + " videoProfile.getWidth "+ videoProfile.getWidth();
//      vvvww = vvvww + " videoProfile.getHeight "+ videoProfile.getHeight();


      Log.e("EncoderProfilesWWWW", vvvww);

//      MediaRecorder.OutputFormat.DEFAULT  // encoderProfiles.getRecommendedFileFormat()
      mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
//      if (enableAudio) {
//        // 0 - 7 // 2
//        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT); //audioProfile.getCodec());
////        mediaRecorder.setAudioEncodingBitRate(audioProfile.getBitrate());
////        mediaRecorder.setAudioSamplingRate(audioProfile.getSampleRate());
//      }
      // 0 - 5 // 3
      mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT); // mediaRecorder.setVideoEncoder(videoProfile.getCodec());
      // ??
//      mediaRecorder.setVideoEncodingBitRate(videoProfile.getBitrate());
      // 0 , 90, ...
//      mediaRecorder.setVideoFrameRate(videoProfile.getFrameRate());
      // me size
      mediaRecorder.setVideoSize(600, 600); // videoProfile.getWidth(), videoProfile.getHeight());
      mediaRecorder.setVideoSize(600, 600);
    } else {
      /// MediaRecorder.OutputFormat.RAW_AMR
      // mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);  //camcorderProfile.fileFormat);
      // if (enableAudio) {
      //   mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);  //camcorderProfile.audioCodec);
      //   mediaRecorder.setAudioEncodingBitRate(16); //camcorderProfile.audioBitRate
      //   mediaRecorder.setAudioSamplingRate(camcorderProfile.audioSampleRate);
      // }
      // mediaRecorder.setVideoEncoder(camcorderProfile.videoCodec);
      // mediaRecorder.setVideoEncodingBitRate(camcorderProfile.videoBitRate);
      // mediaRecorder.setVideoFrameRate(camcorderProfile.videoFrameRate);
      // mediaRecorder.setVideoSize(
      //     camcorderProfile.videoFrameWidth, camcorderProfile.videoFrameHeight);
    }

    mediaRecorder.setOutputFile(outputFilePath);
    mediaRecorder.setOrientationHint(this.mediaOrientation);

    mediaRecorder.prepare();

    return mediaRecorder;
  }

[Taverz]

@KennyTC Hello. I'm not sure if an external camera will work on the emulator. Another problem is that if there is an internal chamber, the external chamber may not open.

[ZateLabClients]

@Taverz
Hi @Taverz , can u please help me with this error?

In android 12, external camera works well in system camera app.
In flutter package, shows "No capture session available for current capture session"

When i inspect ResolutionFeature.java, i found the following condition is not met:
if (CamcorderProfile.hasProfile(cameraId, CamcorderProfile.QUALITY_480P)) {
return CamcorderProfile.get(cameraId, CamcorderProfile.QUALITY_480P);
}

Then i tried to return "return CamcorderProfile.get(cameraId, CamcorderProfile.QUALITY_480P);" without checking the above condition, following error shows:

E/MediaProfiles(15037): The given camcorder profile camera 100 quality 0 is not found
E/MethodChannel#plugins.flutter.io/camera_android(15037): Failed to handle method call
E/MethodChannel#plugins.flutter.io/camera_android(15037): java.lang.RuntimeException: Error retrieving camcorder profile params
E/MethodChannel#plugins.flutter.io/camera_android(15037): at android.media.CamcorderProfile.native_get_camcorder_profiles(Native Method)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at android.media.CamcorderProfile.getAll(CamcorderProfile.java:605)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.features.resolution.ResolutionFeature.getBestAvailableCamcorderProfileForResolutionPreset(ResolutionFeature.java:254)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.features.resolution.ResolutionFeature.configureResolution(ResolutionFeature.java:281)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.features.resolution.ResolutionFeature.(ResolutionFeature.java:55)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.features.CameraFeatureFactoryImpl.createResolutionFeature(CameraFeatureFactoryImpl.java:62)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.features.CameraFeatures.init(CameraFeatures.java:74)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.Camera.(Camera.java:210)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.MethodCallHandlerImpl.instantiateCamera(MethodCallHandlerImpl.java:401)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.MethodCallHandlerImpl.lambda$onMethodCall$0$io-flutter-plugins-camera-MethodCallHandlerImpl(MethodCallHandlerImpl.java:82)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.MethodCallHandlerImpl$$ExternalSyntheticLambda0.onResult(Unknown Source:6)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.CameraPermissions.requestPermissions(CameraPermissions.java:69)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugins.camera.MethodCallHandlerImpl.onMethodCall(MethodCallHandlerImpl.java:75)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:258)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:295)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:322)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(Unknown Source:12)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at android.os.Handler.handleCallback(Handler.java:938)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at android.os.Handler.dispatchMessage(Handler.java:99)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at android.os.Looper.loopOnce(Looper.java:201)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at android.os.Looper.loop(Looper.java:288)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at android.app.ActivityThread.main(ActivityThread.java:7870)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
E/MethodChannel#plugins.flutter.io/camera_android(15037): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
I/flutter (15037): Error: error
I/flutter (15037): Error Message: Error retrieving camcorder profile params

I tried @Taverz your solution but no luck.
Can you help me please.

[Taverz]

I can give you my working code for you to try, I can't help you with anything else.

1. Whether the camera device is detected:

   • Open system camera app and see
   • Or request a connected list of connected devices via starrony

2. Download and unpack the folder by placing it in the root directory.
   https://drive.google.com/file/d/1niY4Pkuijs-EV7Sfzt_x6ks6HfN3GE-4/view?usp=share_link

3. Specify dependencies on the file like this:

   camera:
   ㅤpath: camera # or this path ./camera

4. Test

[rahulbroadview]

here

Hi Pranav,
Did you get the solution for that?

[djensen47]

If the Flutter team needs a use case for this: embedded systems. Particularly kiosks. But this could be used for infotainment systems and so on.

[balaji101010]

Hi @Taverz can you please add your working code as a git repo? is it possible for you?

[eleminer]

Any update on this ?

[Joao-Peterson]

tested the flutter camera example project and one i made myself and could't get any of the apps to even list the OTG Camera with availableCameras().

Tested with Physical Android 9 and 13.

flutter doctor -v:

[✓] Flutter (Channel , 3.19.5, on Linux 6.8.1-arch1-1, locale en_US.UTF-8)
    • Flutter version 3.19.5 on channel  at /usr/lib/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision archlinuxaur (unknown (arch linux aur package)), 2038-01-19 03:14:08
    • Engine revision e76c95649884
    • Dart version 3.3.2
    • DevTools version 2.31.1

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /opt/android-sdk
    • Platform android-34, build-tools 34.0.0
    • ANDROID_HOME = /opt/android-sdk
    • ANDROID_SDK_ROOT = /opt/android-sdk
    • Java binary at: /usr/bin/java
    • Java version OpenJDK Runtime Environment (build 21.0.2+13)
    • All Android licenses accepted.

[✗] Chrome - develop for the web (Cannot find Chrome executable at google-chrome)
    ! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.

[✓] Linux toolchain - develop for Linux desktop
    • clang version 17.0.6
    • cmake version 3.28.3
    • ninja version 1.11.1
    • pkg-config version 2.1.1

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).

[✓] Connected device (2 available)
    • ASUS X01AD (mobile) • 192.168.0.101:5555 • android-arm64 • Android 9 (API 28)
    • Linux (desktop)     • linux              • linux-x64     • Linux 6.8.1-arch1-1

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 2 categories.

[eleminer]

any solutions for that