From bb7c582b5806212892d5c3b547527b9bb32a2318 Mon Sep 17 00:00:00 2001
From: bymyself <cbyrne@comfy.org>
Date: Tue, 20 Jan 2026 12:55:17 -0800
Subject: [PATCH] fix: add fail-fast validation for unsupported codecs

Replace silent fallback to libx264 with explicit validation that raises
ValueError for unknown codec types. Prevents silent codec substitution.
---
 comfy_api/latest/_input_impl/video_types.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/comfy_api/latest/_input_impl/video_types.py b/comfy_api/latest/_input_impl/video_types.py
index ffd105c18..72f149978 100644
--- a/comfy_api/latest/_input_impl/video_types.py
+++ b/comfy_api/latest/_input_impl/video_types.py
@@ -389,7 +389,9 @@ class VideoFromComponents(VideoInput):
             VideoCodec.H264: "libx264",
             VideoCodec.VP9: "libvpx-vp9",
         }
-        ffmpeg_codec = codec_map.get(resolved_codec, "libx264")
+        if resolved_codec not in codec_map:
+            raise ValueError(f"Unsupported codec: {resolved_codec}")
+        ffmpeg_codec = codec_map[resolved_codec]
 
         extra_kwargs = {}
         if resolved_format != VideoContainer.AUTO: