Comfy-Org/ComfyUI · error · Exception

Video generation completed but no video was returned

Error message

Video generation completed but no video was returned

What it means

Error "Video generation completed but no video was returned" thrown in Comfy-Org/ComfyUI.

Source

Thrown at comfy_api_nodes/nodes_veo2.py:248

            if hasattr(video, "bytesBase64Encoded") and video.bytesBase64Encoded:
                return IO.NodeOutput(InputImpl.VideoFromFile(BytesIO(base64.b64decode(video.bytesBase64Encoded))))

            if hasattr(video, "gcsUri") and video.gcsUri:
                return IO.NodeOutput(await download_url_to_video_output(video.gcsUri))

            raise Exception("Video returned but no data or URL was provided")
        raise Exception("Video generation completed but no video was returned")


class Veo3VideoGenerationNode(IO.ComfyNode):

View on GitHub (pinned to 1c6d8d45b3)

Solutions

1. Retry the generation; no video was returned.

When it happens

Trigger: Thrown at comfy_api_nodes/nodes_veo2.py:248 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Comfy-Org/ComfyUI@1c6d8d45b3 (2026-08-14). Data as JSON: /api/errors/57904fd366152282. Report an issue: GitHub.