diff --git a/auto_editor/cmds/test.py b/auto_editor/cmds/test.py
index 2156a6994..2cfd82211 100644
--- a/auto_editor/cmds/test.py
+++ b/auto_editor/cmds/test.py
@@ -549,6 +549,15 @@ def edit_negative_tests():
     def yuv442p():
         return run.main(["resources/test_yuv422p.mp4"], [])
 
+    def prores():
+        run.main(["resources/testsrc.mp4", "-c:v", "prores", "-o", "out.mkv"], [])
+        assert fileinfo("out.mkv").videos[0].pix_fmt == "yuv422p10le"
+
+        run.main(["out.mkv", "-c:v", "prores", "-o", "out2.mkv"], [])
+        assert fileinfo("out2.mkv").videos[0].pix_fmt == "yuv422p10le"
+
+        return "out.mkv", "out2.mkv"
+
     #  Issue 280
     def SAR():
         out = run.main(["resources/SAR-2by3.mp4"], [])
@@ -735,6 +744,7 @@ def palet_scripts():
                 premiere,
                 SAR,
                 yuv442p,
+                prores,
                 edit_negative_tests,
                 edit_positive_tests,
                 audio_norm_f,
diff --git a/auto_editor/render/video.py b/auto_editor/render/video.py
index 23fc458a3..3141dc23a 100644
--- a/auto_editor/render/video.py
+++ b/auto_editor/render/video.py
@@ -26,31 +26,7 @@ class VideoFrame:
     src: FileInfo
 
 
-# From: github.com/PyAV-Org/PyAV/blob/main/av/video/frame.pyx
-allowed_pix_fmt = {
-    "yuv420p",
-    "yuvj420p",
-    "yuv444p",
-    "yuvj444p",
-    "rgb48be",
-    "rgb48le",
-    "rgb64be",
-    "rgb64le",
-    "rgb24",
-    "bgr24",
-    "argb",
-    "rgba",
-    "abgr",
-    "bgra",
-    "gray",
-    "gray8",
-    "gray16be",
-    "gray16le",
-    "rgb8",
-    "bgr8",
-    "pal8",
-}
-
+allowed_pix_fmt = av.video.frame.supported_np_pix_fmts
 
 def make_solid(width: int, height: int, pix_fmt: str, bg: str) -> av.VideoFrame:
     hex_color = bg.lstrip("#").upper()
@@ -132,15 +108,14 @@ def render_av(
 
     codec = av.Codec(args.video_codec, "w")
 
-    if args.video_codec == "gif":
+    if codec.id == 97:  # gif
         if codec.video_formats is not None and target_pix_fmt in (
             f.name for f in codec.video_formats
         ):
             target_pix_fmt = target_pix_fmt
         else:
             target_pix_fmt = "rgb8"
-
-    elif args.video_codec == "prores":
+    elif codec.id == 147:  # prores
         target_pix_fmt = "yuv422p10le"
     else:
         target_pix_fmt = (
@@ -336,10 +311,7 @@ def render_av(
             frame = scale_graph.vpull()
 
         if frame.format.name != target_pix_fmt:
-            if target_pix_fmt == "yuv422p10le":  # workaround for prores
-                frame = frame.reformat(format="yuv444p16le")
-            else:
-                frame = frame.reformat(format=target_pix_fmt)
+            frame = frame.reformat(format=target_pix_fmt)
             bar.tick(index)
         elif index % 3 == 0:
             bar.tick(index)
diff --git a/pyproject.toml b/pyproject.toml
index ccbc2d16b..2d20ee61d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ authors = [{ name = "WyattBlue", email = "wyattblue@auto-editor.com" }]
 requires-python = ">=3.10,<3.14"
 dependencies = [
     "numpy>=1.24,<3.0",
-    "pyav==14.*",
+    "pyav==14.2.0rc1",
 ]
 keywords = [
     "video", "audio", "media", "editor", "editing",