Trouble capturing screen shot from specific camera in URP

Hi all,

I wanted to capture a frame from a specific camera and crop the image to a specific size. Just wondering how you would go about doing this in the new URP? I used to have something working in the old render pipeline but it was a bit confusing, a script had to be placed on the camera and triggered with OnPostRender it all felt a bit hacky.

Could someone point me in the right direction?
Thanks!
Pete

 

Hey thanks, I just checked out the video, it's a nice presentation.
I think I understand where the code should go but sadly I think it's a bit beyond something I could write at the moment. There are just too many factors I don't understand. It always struck me as strange that it's so hard to capture these images that Unity is creating all the time. Anyway, I'll see what I can do.

 

Hey I got something working!
Ended up writing a Texture2D from a Render Texture works but for some reason writing the file has a colour space issue. My project is set to linear and it seems it saves the file out as gamma
I think the problem is in the encodeToPng, does anyone know what might be causing that? I've been through a lot of old threads but they don't seem to have a solution that works.
Any ideas?

So in the RenderTexture the frame looks like this -


And the saved file looks like this -

Code (CSharp):

1. public class CaptureFrame : MonoBehaviour
2. {
3.     public Texture2D texture;
4.     public RenderTexture rt;
5.  
6.     void Start()
7.     {
8.         StartCoroutine(SaveTexture());
9.     }
10.  
11.     public IEnumerator SaveTexture()
12.     {
13.         yield return new WaitForSeconds(1);
14.  
15.         string saveName = Application.persistentDataPath + "TestImage.png";
16.         texture = toTexture2D(rt, TextureFormat.ARGB32);
17.         byte[] bytes = texture.EncodeToPNG();
18.         System.IO.File.WriteAllBytes(saveName, bytes);
19.         while (!System.IO.File.Exists(saveName)) yield return null;
20.         Debug.Log("File written to " + saveName);
21.     }
22.  
23.     Texture2D toTexture2D(RenderTexture rTex, TextureFormat format)
24.     {
25.         Texture2D tex = new Texture2D(rt.width, rt.height, format, false, true);
26.         RenderTexture.active = rTex;
27.         tex.ReadPixels(new Rect(0, 0, rTex.width, rTex.height), 0, 0);
28.         tex.Apply();
29.         return tex;
30.     }
31. }

Thanks,
Pete

 

https://docs.unity3d.com/ScriptReference/ScreenCapture.CaptureScreenshot.html

This worked for me