From d5de5ca0bf4335fb5d55e3f0b2bce99c05c1c7c0 Mon Sep 17 00:00:00 2001
From: C85297 <95289555+C85297@users.noreply.github.com>
Date: Fri, 6 Feb 2026 12:27:30 +0000
Subject: [PATCH] use original mime

---
 src/core/operations/ContainImage.mjs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/core/operations/ContainImage.mjs b/src/core/operations/ContainImage.mjs
index 0f39c817..0304733b 100644
--- a/src/core/operations/ContainImage.mjs
+++ b/src/core/operations/ContainImage.mjs
@@ -115,6 +115,7 @@ class ContainImage extends Operation {
         } catch (err) {
             throw new OperationError(`Error loading image. (${err})`);
         }
+        const originalMime = image.mime;
         try {
             if (isWorkerEnvironment())
                 self.sendStatusMessage("Containing image...");
@@ -139,10 +140,10 @@ class ContainImage extends Operation {
             }
 
             let imageBuffer;
-            if (image.mime === "image/gif") {
+            if (originalMime === "image/gif") {
                 imageBuffer = await image.getBuffer(JimpMime.png);
             } else {
-                imageBuffer = await image.getBuffer(image.mime);
+                imageBuffer = await image.getBuffer(originalMime);
             }
             return imageBuffer.buffer;
         } catch (err) {