sgl-project/sglang · error · ValueError

MiniMax H3 audio material has no audio stream

Error message

MiniMax H3 audio material has no audio stream

What it means

For condition_type audio or video_audio, ffprobe found no stream with codec_type == 'audio'. At least one audio stream is mandatory for these condition types.

Source

Thrown at python/sglang/multimodal_gen/runtime/pipelines_core/stages/model_specific_stages/minimax_h3/material_io.py:426

        "m4a",
        "3gp",
        "3g2",
        "mj2",
        "matroska",
        "webm",
        "wav",
        "mp3",
        "flac",
        "ogg",
    }
    if not format_names or not format_names.issubset(allowed_formats):
        raise ValueError("MiniMax H3 media container format is not allowed")
    video_streams = [s for s in streams if s.get("codec_type") == "video"]
    audio_streams = [s for s in streams if s.get("codec_type") == "audio"]
    if condition_type in {"video", "video_audio"} and not video_streams:
        raise ValueError("MiniMax H3 video material has no video stream")
    if condition_type in {"audio", "video_audio"} and not audio_streams:
        raise ValueError("MiniMax H3 audio material has no audio stream")

    primary_video: dict[str, Any] | None = None
    for stream in video_streams:
        try:
            width = int(stream.get("width") or 0)
            height = int(stream.get("height") or 0)
        except (TypeError, ValueError) as exc:
            raise ValueError(
                "MiniMax H3 video material has invalid dimensions"
            ) from exc
        if width <= 0 or height <= 0:
            raise ValueError("MiniMax H3 video material has no positive dimensions")
        fps = _parse_frame_rate(stream.get("avg_frame_rate")) or _parse_frame_rate(
            stream.get("r_frame_rate")
        )
        if fps <= 0:
            raise ValueError("MiniMax H3 video material has no usable frame rate")
        if primary_video is None:

View on GitHub (pinned to 0132848349)

Solutions

  1. Set condition_type to 'video' if no audio is intended
  2. Add a silent audio track: ffmpeg -i in.mp4 -f lavfi -i anullsrc -shortest -c:v copy out.mp4
  3. Verify with ffprobe that an audio stream exists
Defensive patterns

Strategy: validation

Validate before calling

has_audio = any(s.get("codec_type") == "audio" for s in streams)
assert condition_type not in {"audio", "video_audio"} or has_audio

Prevention

When it happens

Trigger: A silent/muted video re-muxed without an audio track but labeled 'video_audio', or a data file labeled 'audio'.

Common situations: Muted screen recordings, video stripped of audio during transcoding (-an flag), or wrong condition_type in the request.

Related errors

AI-assisted analysis of sgl-project/sglang@0132848349 (2026-08-28). Data as JSON: /api/errors/568f0451c598ed3d. Report an issue: GitHub.