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Please share your experience with tethered cellular
We've recently added a new docs page to include more information on connecting HoloLens to cellular networks. You can find it athttps://aka.ms/HL5G. While hotspot / WiFi is sufficient for most use cases, there are still times when tethering provides some benefit (for example ultra low latency or Azure Remote Rendering). Though we're unable to provide a curated list of cellular devices that are compatible with HoloLens 2, we're hoping folks in our community can share your own experience with the devices that have worked for you. Thanks in advance for sharing, and thank you for being part of the community!
Capturing photos in a quick way (Unity, HoloLens 2)
My objective is to analyze the HoloLens' camera stream.I've been trying to capture what the HoloLens is seeing for image processing but the only properly documented way I've found is through the libraryUnityEngine.Windows.WebCam. The problem with this library is that taking a photo, no matter how small, always takes a heavy toll on the device's performance. I've looked up different ways to capture the camera stream from the HoloLens but the documentations are always lacking something. So I've tried implementing theWindows.Media library in Unity to at least take a quick photo, but it doesn't seem to work. Here is how I've implemented it: using Windows.Media.Capture.Core; using Windows.Media.Devices.Core; private MediaCapture _mediaCapture; private async void StartScanTest() { _mediaCapture = new MediaCapture(); await _mediaCapture.InitializeAsync(); StartCoroutine(ScanTestUWP()); } private IEnumerator ScanTestUWP() { while (true) { CheckPatternUWP(); yield return new WaitForSeconds(0.5f); } } private async void CheckPatternUWP() { var lowLagCapture = await mediaCapture.PrepareLowLagPhotoCaptureAsync(ImageEncodingProperties.CreateUncompressed(MediaPixelFormat.Bgra8)); var capturedPhoto = await lowLagCapture.CaptureAsync(); var softwareBitmap = capturedPhoto.Frame.SoftwareBitmap; byte[] imageBytes = new byte[4 * softwareBitmap.PixelWidth * softwareBitmap.PixelHeight]; softwareBitmap.CopyToBuffer(imageBytes.AsBuffer()); Texture2D photoTexture = new Texture2D(1,1); photoTexture.LoadImage(imageBytes); await lowLagCapture.FinishAsync(); if (photoTexture) { CheckFromTexture(photoTexture); } } This is all under the#if UNITY_UWP preprocessor directive. Is there a way to get the actual camera stream from the HoloLens? If not, how can I take pictures without stuttering?
Hololens 2 FileOpenPicker: no access to Documents folder
We're developing a B2B Hololens 2 application (in Unity, with MRTK). As data input for our app we load in.csv files which contain configuration settings, these are different every time the app is used. We're able to use FileOpenPicker to bring up the Hololens File Explorer in the app to select the .csv file we need. However, when the file is in the Documents or Downloads folder access to read them is denied - but when we put them in the Pictures folder (and declare access through the Appxmanifest > Capabilities > Pictures Library) we can read and write the files just fine. Is there a way to allow access to the Documents and/or Downloads folder as well?
All my Unity HoloLens 2 apps launch in 2D on the HoloLens 2
Any help would be great. I have tried setting the camera Clear Flags to Solid and the background RGBA as 0,0,0,0 which was one suggestion. But after i run the project in Unity the Alpha always resets to 255. And when i deploy via VS it is windowed on the HoloLens 2 I have tried and verified that the Project Settings / Player / Publishing Settings / Supported Device Families / has "Holographic" selected. I have made sure the XR Plug-in Management / Plug-in Providers / is set to Windows Mixed Reality. Going nuts here. 🙂
Hololens 2 Microphone issue
Hello all Would anybody be able to suggest a way to allow the Hololens 2 to be used for streaming a meeting where people watching can hear everyone in the room, or at least close by. During a test run, the people watching the stream could only hear the person wearing the Hololens device That you for your help
HoloLens 2 Overheat Issue
Hi, my company has been using HoloLens 2 since September 2020. So it's been almost a year until today. During this time period, the HoloLens 2 had been used mainly as tools for presenting demo to clients about the following applications: 1. Dynamics 365 Remote Assist, 2. Dynamics 365 Guides, and 3. Trimble Connect. The issue that I would highlight in this topic is the overheat problem in HoloLens 2. At first, the usage time (full usage of remote assist) could range between 60-80 minutes (outdoor) before the appearance of the overheat warning. But as time goes by, the time usage dropped drastically and therefore the frequency of overheating increases a lot, even when used indoor at room temperature. In the most recent case, the average usage time until the overheat warning appeared is between 30-40 minutes (it varied based on the running application). If there are any similar issue, please kindly share your experience with me. If someone knows the roundabout solutions for this issue, I appreciate it a lot if you could drop it in this thread.
Gamma/brightness wrong when using Unity with HDRP on Windows Mixed Reality
Hi I have a scene in Unity 2020, which I am trying to get working with Mixed Reality XR Plug-in. So far I imported MRTK, enabled "Windows Mixed Reality" in Project Settings -> XR Plug-in Management, got hmd position and controller input working again by following migration notes by Unity. I have an HP Reverb headset (gen 1). The problem I am facing right now is that scene looks visually different in HMD when working with Windows Mixed Reality natively. It is much darker than in editor window and overall ugly. If I switch to SteamVR plugin, the picture in the device looks exactly like it is supposed to look (using the exact same headset). Here is a screenshot of the problem: The scene is exactly the same, I used the camera rig that comes with MRTK in both cases, I didn't touch any of the settings (light, quality, render, HDRP,...), the only difference is in the XR Plug-in Management: Can you please point me to the right direction to solve this problem? Are there some settings that should be different for Mixed Reality to work correctly with HDRP? Thank you for your help.
