Comfy-Org/ComfyUI · error · ValueError

Video width must be at least {min_width}px, got {width}px

Error message

Video width must be at least {min_width}px, got {width}px

What it means

ValueError from validate_video_dimensions when the video's width is below the node/API minimum. Width/height come from video.get_dimensions() on an Input.Video object; if that call itself throws, the validator logs and silently returns (no error), so this raise only happens with a successfully-read but undersized video.

Source

Thrown at comfy_api_nodes/util/validation_utils.py:110

    _assert_ratio_bounds(ar, min_ratio=min_ratio, max_ratio=max_ratio, strict=strict)
    return ar


def validate_video_dimensions(
    video: Input.Video,
    min_width: int | None = None,
    max_width: int | None = None,
    min_height: int | None = None,
    max_height: int | None = None,
):
    try:
        width, height = video.get_dimensions()
    except Exception as e:
        logging.error("Error getting dimensions of video: %s", e)
        return

    if min_width is not None and width < min_width:
        raise ValueError(f"Video width must be at least {min_width}px, got {width}px")
    if max_width is not None and width > max_width:
        raise ValueError(f"Video width must be at most {max_width}px, got {width}px")
    if min_height is not None and height < min_height:
        raise ValueError(f"Video height must be at least {min_height}px, got {height}px")
    if max_height is not None and height > max_height:
        raise ValueError(f"Video height must be at most {max_height}px, got {height}px")


def validate_video_duration(
    video: Input.Video,
    min_duration: float | None = None,
    max_duration: float | None = None,
):
    try:
        duration = video.get_duration()
    except Exception as e:
        logging.error("Error getting duration of video: %s", e)
        return

View on GitHub (pinned to 1c6d8d45b3)

Solutions

1. Upscale or re-export the video so width >= min_width.
2. Use higher-resolution source footage.
3. Pick a node/provider with lower minimum width requirements.

width, height = video.get_dimensions()
if width < MIN_W:
    raise ValueError(f"video too narrow: {width}px < {MIN_W}px")

When it happens

Trigger: validate_video_dimensions(video, min_width=N) with width < N — e.g., a 480px-wide clip passed to a video API node requiring min_width=768.

Common situations: Low-resolution source footage; mobile-landscape clips fed to providers with HD minimums; downscaling in the workflow before the API node.

Related errors

• Video width must be at most {max_width}px, got {width}px
• Video height must be at least {min_height}px, got {height}px
• Video height must be at most {max_height}px, got {height}px
• ar_video sampler requires 5-D video latents [B,C,T,H,W], got
• unknown merge strategy {self.merge_strategy}

AI-assisted analysis of Comfy-Org/ComfyUI@1c6d8d45b3 (2026-08-14). Data as JSON: /api/errors/06023f173af7717c. Report an issue: GitHub.