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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(153.6, 69%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Hello!
Hololens2 application is under development with unity.
I have one question. I wrote a program to display the camera connected to Hololens2 in a C# project in unity. I used unity's webcamtexture class. When I built it, wrote it to Hololens and started the application, I was able to display the camera image, but I could not record it with the recording function installed in Hololens2.
I would like to know how to solve the above problem.
こんにちは！
Hololens2のアプリケーションをunityで開発中のものです。
1点ご質問があります。
unity内のC#プロジェクトで、Hololens2に接続されているカメラを表示させるプログラムを記述しました。
unityのwebcamtextureクラスを使用しました。
それをビルドし、Hololensに書き込んでアプリケーションを開始したところ、カメラ画像の表示はできましたが、それをHololens2に搭載されている録画機能で録画をすることはできませんでした。
上記の問題を解決するための方法を教えていただきたいです。
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(265.6, 1%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EZW%3C/text%3E%3C/svg%3E)
Hello, Welcome to Microsoft Q&A,
How did you implement the recording function? Could you provide the relevant code snippet? Please also check the log file in Device portal->System->File explorer->LocalAppData->[ProjectName]->TempState for any error messages.
こんにちは
返信が遅れてすいません．
録画機能は，hololensに搭載されているキャプチャ機能を用いました．
以下のurlを参考にしました．
https://learn.microsoft.com/ja-jp/hololens/holographic-photos-and-videos
また，hololensのデバイスポータルから，
views - mixed reality capture から録画しようとしましたが，こちらも失敗しました．
live preview を行うと，本来，カメラが写ってる画面が，真っ黒で表示される．
録画しようとすると
Recording failed.といわれる．
もしくは，録画が強制終了する．
カメラ画像の表示は，unityのwebcam textureを使って，カメラ画像をtexture2dに変換して表示させています．
また，デバイスポータルのエラーメッセージに関してですが，
ログファイルにエラーメッセージの記載は見当たらなかった．
ーーー
Hello!
sorry for the late reply.
For the recording function, we used the capture function installed in Hololens.
I used the following URL as a reference.
https://learn.microsoft.com/ja-jp/hololens/holographic-photos-and-videos
Also, from the hololens device portal,
I tried to record from views - mixed reality capture, but that also failed.
When performing a live preview, the screen where the camera is originally displayed is displayed completely black.
When I try to record
It is said that Recording failed.
Or the recording will be forced to stop.
To display the camera image, use Unity's webcam texture to convert the camera image to texture2d and display it. Also, regarding the device portal error message,
No error message was found in the log file.
Recard.
I did some tests with WebCamTexture and in my tests WebCamTexture can run simultaneously with MRC. Could you share with us your HoloLens OS version and Unity version? Regarding WebCamTexuture, could you provide your code so that I can try to reproduce this issue?
There are some limitations for simultaneous access to P/V camera. For example, if you enable the built-in MRC first and then run WebCamTexture related functions, MRC will stop. But if you run the WebCamTexuture related functions first and then enable the built-in MRC, MRC will run in SharedReadOnly mode. For more information, please refer to Mixed reality capture (DirectX) - Mixed Reality | Microsoft Learn.
返信ありがとうございます．
HololensのOSは以下の通りです．
エディション
Widows Holographic for business
ビルド2262.1133
unityのバージョンは
2021.3.27f1です．
また，MRTK2.8を導入しています．
Webcam textureのコードは以下の通りです．
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class WebCamController : MonoBehaviour
{
// Start is called before the first frame update
int width = 1920;
int height = 1080;
int fps = 30;
WebCamTexture webcamTexture;
void Start()
{
WebCamDevice[] devices = WebCamTexture.devices;
webcamTexture = new WebCamTexture(devices[0].name, this.width, this.height, this.fps);
GetComponent<Renderer> ().material.mainTexture = webcamTexture;
webcamTexture.Play();
}
// Update is called once per frame
void Update()
{
}
}
Hololens上，unity上で正常動作しますが，録画はできません．
thank you for your reply.
The OS of Hololens is as follows.
edition
Windows Holographic for business
Build 2262.1133
The version of unity is
It is 2021.3.27f1.
We have also introduced MRTK2.8.
The code for the webcam texture is as follows.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class WebCamController : MonoBehaviour
{
// Start is called before the first frame update
int width = 1920;
int height = 1080;
int fps = 30;
WebCamTexture webcamTexture;
void Start()
{
WebCamDevice[] devices = WebCamTexture.devices;
webcamTexture = new WebCamTexture(devices[0].name, this.width, this.height, this.fps);
GetComponent<Renderer> ().material.mainTexture = webcamTexture;
webcamTexture.Play();
}
// Update is called once per frame
void Update()
{
}
}
It works normally on Hololens and Unity, but recording is not possible.
返信ありがとうございます．
HololensのOSは以下の通りです．
エディション
Widows Holographic for business
ビルド2262.1133
unityのバージョンは
2021.3.27f1です．
また，MRTK2.8を導入しています．
Webcam textureのコードは以下の通りです．
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class WebCamController : MonoBehaviour
{
// Start is called before the first frame update
int width = 1920;
int height = 1080;
int fps = 30;
WebCamTexture webcamTexture;
void Start()
{
WebCamDevice[] devices = WebCamTexture.devices;
webcamTexture = new WebCamTexture(devices[0].name, this.width, this.height, this.fps);
GetComponent<Renderer> ().material.mainTexture = webcamTexture;
webcamTexture.Play();
}
// Update is called once per frame
void Update()
{
}
}
上記をplaneオブジェクトにアタッチして，そのオブジェクトに投影しています．
Hololens上，unity上で正常動作しますが，録画はできません．
thank you for your reply.
The OS of Hololens is as follows.
edition
Windows Holographic for business
Build 2262.1133
The version of unity is
It is 2021.3.27f1.
We have also introduced MRTK2.8.
The code for the webcam texture is as follows.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class WebCamController : MonoBehaviour
{
// Start is called before the first frame update
int width = 1920;
int height = 1080;
int fps = 30;
WebCamTexture webcamTexture;
void Start()
{
WebCamDevice[] devices = WebCamTexture.devices;
webcamTexture = new WebCamTexture(devices[0].name, this.width, this.height, this.fps);
GetComponent<Renderer> ().material.mainTexture = webcamTexture;
webcamTexture.Play();
}
// Update is called once per frame
void Update()
{
}
}
The above is attached to a plane object and projected onto that object.
It works normally on Hololens and Unity, but recording is not possible.
追記
上記C#コードをplaneオブジェクトにアタッチして，そのオブジェクトに投影しています．
The above C# code is attached to the plane object and reflected on that object.
再度の追記すいません．
できれば，動作したあなたのコードを共有していただけないでしょうか？
Sorry for adding again.
If possible, could you please share your working code?
My code is almost the same as yours and I tested your code on Unity 2021.3.27f1 and HoloLens OS 22621.1244 and it works.
However, I noticed during testing that the resolution of 1920*1080 takes up a lot of performance, which may cause MRC to not work as expected.
Maybe you could try updating the HoloLens OS and setting a lower resolution for the WebCamTexture.
再度の追記すいません．
できれば，動作したあなたのコードを共有していただけないでしょうか？
Sorry for adding again.
If possible, could you please share your working code?