Bug ARCameraManager currentConfiguration does not report resolution

Hi all. As far as I can tell, there's no way to get the camera preview resolution from ARFoundation. I wrote a script to do this:

Code (CSharp):

1. IEnumerator Start ()
2. {
3.     yield return new WaitUntil(() => ARSession.state == ARSessionState.SessionInitializing || ARSession.state ==  ARSessionState.SessionTracking);
4.     Debug.Log("Config is null? " + cameraManager.currentConfiguration == null);
5.     Debug.Log("Config resolution: " + cameraManager.currentConfiguration?.resolution);
6. }

But the resolution (and the individual `width` and `height` properties) always return zero:

Code (CSharp):

1. 2020-08-14 15:46:51.914133-0400 AR-Playground[18193:3770299] UnityARKit: Updating ARSession configuration with <ARWorldTrackingConfiguration: 0x283c2e440 worldAlignment=Gravity lightEstimation=Disabled frameSemantics=None videoFormat=<ARVideoFormat: 0x282e51bd0 imageResolution=(1920, 1440) framesPerSecond=(60)> autoFocus=Enabled environmentTexturing=None wantsHDREnvironmentTextures=Enabled planeDetection=Horizontal collaboration=Disabled userFaceTracking=Disabled>
2. Config is null? False
3. UnityEngine.DebugLogHandler:Internal_Log(LogType, LogOption, String, Object)
4. UnityEngine.DebugLogHandler:LogFormat(LogType, Object, String, Object[])
5. UnityEngine.Logger:Log(LogType, Object)
6. UnityEngine.Debug:Log(Object)
7. <Start>d__7:MoveNext()
8. UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)
9. (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
10.  
11. Config resolution: (0, 0)
12. UnityEngine.DebugLogHandler:Internal_Log(LogType, LogOption, String, Object)
13. UnityEngine.DebugLogHandler:LogFormat(LogType, Object, String, Object[])
14. UnityEngine.Logger:Log(LogType, Object)
15. UnityEngine.Debug:Log(Object)
16. <Start>d__7:MoveNext()
17. UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)

And interestingly enough, right above the logs from my code, ARKit clearly states that the resolution is 1920x1440 @60Hz. So I wonder why ARF is unable to report this.

 

Bump.

 

In my tests, ARCameraManager.currentConfiguration is correctly reported only after the first frameReceived event.

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.Assertions;
3. using UnityEngine.XR.ARFoundation;
4.  
5.  
6. public class CameraConfigurationTest : MonoBehaviour {
7.     [SerializeField] ARCameraManager cameraManager = null;
8.  
9.     bool firstFrameReceived;
10.  
11.  
12.     void OnEnable() {
13.         cameraManager.frameReceived += frameReceived;
14.     }
15.  
16.     void OnDisable() {
17.         cameraManager.frameReceived -= frameReceived;
18.     }
19.  
20.     void frameReceived(ARCameraFrameEventArgs _) {
21.         if (!firstFrameReceived) {
22.             firstFrameReceived = true;
23.  
24.             if (cameraManager.descriptor.supportsCameraConfigurations) {
25.                 var cameraConfiguration = cameraManager.currentConfiguration;
26.                 Assert.IsTrue(cameraConfiguration.HasValue);
27.                 print($"resolution: {cameraConfiguration.Value.resolution}");
28.             }
29.         }
30.     }
31. }
32.  

 

I've been able to reproduce this. I wish this was mentioned in the documentation. Thanks!

 

Lanre AR Camera resolution always 640*480 in android device. How to change resolution by dynamically according to device?

 

Hm I'm not too sure; IIRC, you'll have to set the ARCameraManager configuration in your Start method. I haven't worked with ARFoundation in quite a while.