Comfy-Org/ComfyUI · error · ValueError

Total reference video duration is {total_video_duration:.1f}

Error message

Total reference video duration is {total_video_duration:.1f}s. Maximum is {limits['max_total_seconds']} seconds.

What it means

The combined duration of all reference videos (only those whose get_duration() succeeded; unreadable durations are silently skipped via the bare except) must not exceed limits["max_total_seconds"] (30.1s for Seedance 2.5). The node sums probed durations client-side and rejects the batch before upload, quoting the measured total and the cap.

Source

Thrown at comfy_api_nodes/nodes_bytedance.py:2803

            if min_px:
                for key in reference_videos:
                    reference_videos[key] = upscale_video_to_min_pixels(reference_videos[key], min_px)

        total_video_duration = 0.0
        for i, key in enumerate(reference_videos, 1):
            video = reference_videos[key]
            _validate_ref_video_pixels(video, model_id, model["resolution"], i)
            try:
                dur = video.get_duration()
                if dur < 1.8:
                    raise ValueError(f"Reference video {i} is too short: {dur:.1f}s. Minimum duration is 1.8 seconds.")
                total_video_duration += dur
            except ValueError:
                raise
            except Exception:
                pass
        if total_video_duration > limits["max_total_seconds"]:
            raise ValueError(
                f"Total reference video duration is {total_video_duration:.1f}s. "
                f"Maximum is {limits['max_total_seconds']} seconds."
            )

        total_audio_duration = 0.0
        for i, key in enumerate(reference_audios, 1):
            audio = reference_audios[key]
            dur = int(audio["waveform"].shape[-1]) / int(audio["sample_rate"])
            if dur < 1.8:
                raise ValueError(f"Reference audio {i} is too short: {dur:.1f}s. Minimum duration is 1.8 seconds.")
            total_audio_duration += dur
        if total_audio_duration > limits["max_total_seconds"]:
            raise ValueError(
                f"Total reference audio duration is {total_audio_duration:.1f}s. "
                f"Maximum is {limits['max_total_seconds']} seconds."
            )

        asset_labels = _build_asset_labels(

View on GitHub (pinned to 1c6d8d45b3)

Solutions

1. Trim clips so the summed duration fits under the stated maximum.
2. Drop the least important reference video(s).
3. Replace long sections with a few representative seconds per clip.

total = sum(v.get_duration() for v in reference_videos.values())
assert total <= seedance2_reference_limits(model_id)["max_total_seconds"]

When it happens

Trigger: Several reference videos whose durations sum above max_total_seconds (e.g. four 10-second clips = 40s > 30.1s) on the reference node.

Common situations: Multi-clip reference workflows after adding one more clip; referencing long shots without trimming; switching models where the total budget differs.

Related errors

• Reference video {i} is too short: {dur:.1f}s. Minimum durati
• Reference audio {i} is too short: {dur:.1f}s. Minimum durati
• Total reference audio duration is {total_audio_duration:.1f}
• Reference video {index} is too small: {w}x{h} = {pixels:,} t
• Reference video {index} is too large: {w}x{h} = {pixels:,} t

AI-assisted analysis of Comfy-Org/ComfyUI@1c6d8d45b3 (2026-08-14). Data as JSON: /api/errors/956946596b0e27d1. Report an issue: GitHub.