From 61011ecea0eb86f50813d39a9172e86d417c1c0d Mon Sep 17 00:00:00 2001
From: Jakub Trllo <43494761+iLLiCiTiT@users.noreply.github.com>
Date: Thu, 2 Oct 2025 09:53:51 +0200
Subject: [PATCH 1/3] use ayon api implementation of mime type

---
 client/ayon_core/lib/transcoding.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/client/ayon_core/lib/transcoding.py b/client/ayon_core/lib/transcoding.py
index b3958863fe..dd44d4a673 100644
--- a/client/ayon_core/lib/transcoding.py
+++ b/client/ayon_core/lib/transcoding.py
@@ -1519,12 +1519,24 @@ def get_media_mime_type(filepath: str) -> Optional[str]:
         Optional[str]: Mime type or None if is unknown mime type.
 
     """
+    try:
+        from ayon_api.utils import (
+            get_media_mime_type_for_content as _ayon_api_func
+        )
+    except ImportError:
+        _ayon_api_func = None
+
     if not filepath or not os.path.exists(filepath):
         return None
 
     with open(filepath, "rb") as stream:
         content = stream.read()
 
+    if _ayon_api_func is not None:
+        mime_type = _ayon_api_func(content)
+        if mime_type is not None:
+            return mime_type
+
     content_len = len(content)
     # Pre-validation (largest definition check)
     # - hopefully there cannot be media defined in less than 12 bytes

From ab058d15c524bd9ddaf9659f855be384408552b7 Mon Sep 17 00:00:00 2001
From: Jakub Trllo <43494761+iLLiCiTiT@users.noreply.github.com>
Date: Thu, 2 Oct 2025 09:59:40 +0200
Subject: [PATCH 2/3] copy implementation from ayon api

---
 client/ayon_core/lib/transcoding.py | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/client/ayon_core/lib/transcoding.py b/client/ayon_core/lib/transcoding.py
index dd44d4a673..36a0caef27 100644
--- a/client/ayon_core/lib/transcoding.py
+++ b/client/ayon_core/lib/transcoding.py
@@ -1563,11 +1563,13 @@ def get_media_mime_type(filepath: str) -> Optional[str]:
     if b'xmlns="http://www.w3.org/2000/svg"' in content:
         return "image/svg+xml"
 
-    # JPEG, JFIF or Exif
-    if (
-        content[0:4] == b"\xff\xd8\xff\xdb"
-        or content[6:10] in (b"JFIF", b"Exif")
-    ):
+    # JPEG
+    # - [0:2] is constant b"\xff\xd8"
+    #   (ref. https://www.file-recovery.com/jpg-signature-format.htm)
+    # - [2:4] Marker identifier b"\xff{?}"
+    #   (ref. https://www.disktuna.com/list-of-jpeg-markers/)
+    # NOTE: File ends with b"\xff\xd9"
+    if content[0:3] == b"\xff\xd8\xff":
         return "image/jpeg"
 
     # Webp

From 71da4a02ecc923c93474b1dfdf7df4dfbacd9dc1 Mon Sep 17 00:00:00 2001
From: Jakub Trllo <43494761+iLLiCiTiT@users.noreply.github.com>
Date: Thu, 2 Oct 2025 10:11:50 +0200
Subject: [PATCH 3/3] added comments to safe import

---
 client/ayon_core/lib/transcoding.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/client/ayon_core/lib/transcoding.py b/client/ayon_core/lib/transcoding.py
index 36a0caef27..75f0c8bc4d 100644
--- a/client/ayon_core/lib/transcoding.py
+++ b/client/ayon_core/lib/transcoding.py
@@ -1519,6 +1519,9 @@ def get_media_mime_type(filepath: str) -> Optional[str]:
         Optional[str]: Mime type or None if is unknown mime type.
 
     """
+    # The implementation is identical or better with ayon_api >=1.1.0,
+    #   which is used in AYON launcher >=1.3.0.
+    # NOTE Remove safe import when AYON launcher >=1.2.0.
     try:
         from ayon_api.utils import (
             get_media_mime_type_for_content as _ayon_api_func