From c61d115c23a6ee9d645db42a36b1e30fd392f4b6 Mon Sep 17 00:00:00 2001
From: CCharles99 <ccha0057@student.monash.edu>
Date: Fri, 5 Jun 2026 11:48:38 +0100
Subject: [PATCH] applied premultiply alpha before each video frame

---
 src/source/video_source.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/source/video_source.ts b/src/source/video_source.ts
index 989c6114ddd..5b63320e34c 100644
--- a/src/source/video_source.ts
+++ b/src/source/video_source.ts
@@ -212,6 +212,7 @@ class VideoSource extends ImageSource<'video'> {
             this.width = this.video.videoWidth;
             this.height = this.video.videoHeight;
         } else if (!this.video.paused) {
+            context.pixelStoreUnpackPremultiplyAlpha.set(true);
             this.texture.bind(gl.LINEAR, gl.CLAMP_TO_EDGE);
             gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl.RGBA, gl.UNSIGNED_BYTE, this.video);
         }