Model Overview

NVIDIA-NemotronLabs-AI-for-Media-Sports-Tennis

At a Glance


Total parameters	31B (Mamba2-Transformer hybrid Mixture of Experts (MoE))
Active parameters	~3B per token
Max context	256k tokens
Modalities (in)	Video, Audio, Image, Text
Modality (out)	Text
Best for	Point-level tennis Q&A, shot and court understanding, match-state reasoning, rules knowledge, and audio-aware point analysis
Fine-tuning data	1.31M Q&A pairs over 43k point clips (239 matches)
Minimum GPU (BF16)	1× A100 80GB or 1× H100 80GB (single-GPU); 1× B200 / 1× H200 recommended
Precisions	bfloat16 (BF16) (`NVIDIA-NemotronLabs-AI-for-Media-Sports-Tennis`, ~62 GB) — TBD

Description:

NVIDIA-NemotronLabs-AI-for-Media-Sports-Tennis is a fine-tuned multimodal large language model derived from Nemotron 3 Nano Omni. It was further trained on an in-house NVIDIA tennis dataset of manually labeled point-level video clips to specialize in tennis match understanding. The model supports structured multiple-choice and open-ended Q&A over point clips, covering shot mechanics, court positioning, player movement, match facts, rules knowledge, and audio cues. It works best when a full tennis point clip is passed as input.

This model is fine-tuned from Nemotron 3 Nano Omni on an in-house NVIDIA tennis dataset of tennis point video clips using the NVIDIA Sports Intelligence playbooks. For base model details, see the base model card.

This model is ready for commercial or non-commercial use.

License/Terms of Use

Governing Terms: Use of this model is governed by the OpenMDW License Agreement v1.1 (OpenMDW-1.1)

Deployment Geography:

Global

Use Case:

This model is designed for tennis-specific multimodal understanding over point-level video. Expected users include:

Tennis broadcast and media workflows — point-level Q&A, shot and outcome understanding, and audio cue interpretation over match footage
Coaching and performance analysis — structured and open-ended questions about shots, positioning, movement, and rally structure on point clips
Sports analytics and production — match-fact and score-state reasoning aligned with point-level annotations
Enterprise tennis applications — searchable point-level understanding and tennis-domain assistants over archived match video

Release Date:

Hugging Face 09/10/2026 via Hugging Face

Model Architecture:

Architecture Type: Other (Mamba2-Transformer hybrid Mixture of Experts backbone with multimodal encoders)

Network Architecture:

Nemotron 3 Nano LLM (30B A3B) — 31B-parameter Mamba2-Transformer hybrid MoE backbone with ~3B active parameters per token.
CRADIO v4-H — vision encoder for image and video frames.
Parakeet — speech encoder for audio inputs.

Number of model parameters: 3.1 x 10^10 (31B A3B)

How the model was developed: Weights are initialized from the pretrained Nemotron 3 Nano Omni BF16 checkpoint. Fine-tuning trains only the language-model parameters; the vision and audio encoders remain frozen. Optimization uses AdamW (learning rate 5×10⁻⁵, β=(0.9, 0.999)) with warmup and cosine decay, regularized by weight decay 0.05 and gradient clipping at max-norm 1.0, with no additional damping. Training is BF16 packed supervised fine-tuning over point-level tennis clips. Hyperparameters follow the published NeMo AutoModel recipe rather than a dedicated search.

Input(s):

Input Type(s): Video, Audio, Image, Text

Input Format(s):

Video: mp4, up to 2 minutes. For tennis tasks, pass a full tennis point clip as input for best results. For 1080p videos, sample up to 1 FPS (frames per second) / 128 frames. For lower-resolution videos such as 720p, higher temporal sampling such as 2 FPS / 256 frames may be used.
Audio: wav, mp3 files (up to 1 hour), 8kHz and higher sampling rates
Image: Red, Green, Blue (RGB) (jpeg, png)
Text: String

Input Parameters:

Video: Three-Dimensional (3D)
Audio: One-Dimensional (1D)
Image: Two-Dimensional (2D)
Text: One-Dimensional (1D)

Other Properties Related to Input:

Recommended input: a full tennis point (video clip, with audio when available), matching the point-level clips used during fine-tuning
Maximum context length up to 256k tokens
Language support: English only

Output(s)

Output Type(s): Text

Output Format(s):

Text: String

Output Parameters:

Text: One-Dimensional (1D)

Other Properties Related to Output:

Maximum context length up to 256k tokens.

Our AI models are designed and/or optimized to run on NVIDIA GPU-accelerated systems. By leveraging NVIDIA's hardware (e.g. GPU cores) and software frameworks (e.g., CUDA libraries), the model achieves faster training and inference times compared to central processing unit (CPU)-only solutions.

Software Integration:

Runtime Engine(s):

NeMo
Megatron

Supported Hardware Microarchitecture Compatibility:

NVIDIA Ampere (A100 80GB SXM/NVLink)
NVIDIA Blackwell (B200 SXM/NVLink, RTX Pro 6000 SE, DGX Spark, Jetson Thor, RTX 5090)
NVIDIA Hopper (H100 SXM/NVLink, H200 SXM/NVLink)
NVIDIA Lovelace (L40S)

Preferred/Supported Operating System(s):

Linux

The integration of foundation and fine-tuned models into AI systems requires additional testing using use-case-specific data to ensure safe and effective deployment. Following the V-model methodology, iterative testing and validation at both unit and system levels are essential to mitigate risks, meet technical and functional requirements, and ensure compliance with safety and ethical standards before deployment.

Quick Start

Video inference

This repo includes a sample full point at media/full_tennis_point.mp4 for inference. You can also pass your own MP4 (serve through end of point, with audio when available). Frames are sampled with video_io.py, included with this model.

Convenience script

For a ready-to-run CLI (download, load, sample frames, and generate), use video_inference.py in this repo:

pip install torch transformers accelerate huggingface_hub safetensors pillow \
  librosa soundfile decord imageio-ffmpeg

python video_inference.py

video_inference.py uses the bundled clip media/full_tennis_point.mp4 and the default caption prompt when --video / --question are omitted. Override with --video /path/to/point.mp4 and/or --question '...'. Add --local-files-only after weights are cached. The bundled demo clip is video-only; the script detects missing audio and runs video-only inference. When your MP4 has an audio track, it uses video + audio (extracting a 16 kHz WAV with ffmpeg if librosa cannot decode the container). Pass --extract-audio-wav to force WAV extraction, or --no-audio to skip audio.

The first AutoModel.from_pretrained(..., trust_remote_code=True) also downloads RADIO vision code from nvidia/C-RADIOv4-H.

Default inference policy (same as video_inference.py): 2 frames per second (FPS), up to 128 frames, 256 new tokens, greedy decode, video_pruning_rate=0.0. In the Python snippet below, set audio_present=True to include audio from your MP4 (leave False for the bundled video-only demo).

Python snippet

The core inference steps (functionally equivalent to video_inference.py):

import importlib.util
import os
import shutil
import subprocess
import tempfile
from pathlib import Path

import torch
from huggingface_hub import snapshot_download
from transformers import AutoConfig, AutoModel, AutoProcessor
from transformers.video_utils import VideoMetadata

repo_id = "nvidia/NVIDIA-NemotronLabs-AI-for-Media-Sports-Tennis"
question = (
    "What happened in this point? Provide a detailed caption. "
    '(Major - "Major" is the player in the white sleeveless tennis dress with a pleated skirt. '
    "She is wearing white shoes and has dark hair tied back in a ponytail.; "
    'Mustermann - "Mustermann" is the player in the black sleeveless top and black pleated skirt '
    "with white piping along the sides and hem. She is wearing white shoes and has blonde hair "
    "tied back in a ponytail. She is holding a green and black tennis racket with a red grip.)"
)
video_fps, max_video_frames, max_new_tokens = 2, 128, 256
revision, local_files_only = None, False  # optional: pin Hub commit; cache-only load
audio_present = False  # bundled demo is video-only; set True when your MP4 has audio

cache_dir = os.environ.get("HF_HOME") or os.environ.get("HF_HUB_CACHE")
hub = {"trust_remote_code": True, "local_files_only": local_files_only}
if cache_dir:
    hub["cache_dir"] = cache_dir
if revision:
    hub["revision"] = revision
snapshot_dir = snapshot_download(
    repo_id=repo_id, repo_type="model", **{k: v for k, v in hub.items() if k != "trust_remote_code"}
)
video_path = str(Path(snapshot_dir) / "media/full_tennis_point.mp4")

spec = importlib.util.spec_from_file_location("checkpoint_video_io", Path(snapshot_dir) / "video_io.py")
video_io = importlib.util.module_from_spec(spec)
spec.loader.exec_module(video_io)
frame_urls, metadata = video_io.sample_video_frames_to_data_urls(
    video_path, fps=max(0, int(video_fps)), nframe_max=max_video_frames,
)
frames = [video_io.pil_image_from_base64(url) for url in frame_urls]
video_metadata = VideoMetadata(
    total_num_frames=metadata.total_num_frames, fps=metadata.fps, frames_indices=metadata.frames_indices,
)

audio_wav = None
if audio_present:
    ffmpeg = shutil.which("ffmpeg")
    if ffmpeg is None:
        import imageio_ffmpeg
        ffmpeg = imageio_ffmpeg.get_ffmpeg_exe()
    audio_wav = tempfile.NamedTemporaryFile(suffix=".wav", delete=False).name
    subprocess.run(
        [ffmpeg, "-nostdin", "-y", "-i", video_path, "-vn", "-acodec", "pcm_s16le",
         "-ar", "16000", "-ac", "1", audio_wav],
        check=True, capture_output=True,
    )

processor = AutoProcessor.from_pretrained(repo_id, **hub)
config = AutoConfig.from_pretrained(repo_id, **hub)
config.video_pruning_rate = 0.0
model = AutoModel.from_pretrained(
    repo_id, config=config, torch_dtype=torch.bfloat16,
    device_map={"": 0} if torch.cuda.is_available() else None, low_cpu_mem_usage=True, **hub,
)
if hasattr(model, "vision_model") and hasattr(model.vision_model, "radio_model"):
    model.vision_model.radio_model.summary_idxs = None
model.eval()

media = processor.video_token
if audio_present:
    media = f"{media}\n{processor.audio_token}\n"
prompt = processor.tokenizer.apply_chat_template(
    [{"role": "user", "content": f"{media}{question}"}],
    tokenize=False, add_generation_prompt=True, enable_thinking=False,
)
processor_kwargs = {
    "text": [prompt], "videos": frames, "return_tensors": "pt", "do_sample_frames": False,
    "videos_kwargs": {"video_metadata": video_metadata},
}
if audio_present:
    processor_kwargs["audio"] = [audio_wav]
    processor_kwargs["audio_kwargs"] = {"sampling_rate": 16000}
inputs = processor(**processor_kwargs)
for key in ("num_patches", "num_tokens", "imgs_sizes"):
    inputs.pop(key, None)
device = next(model.parameters()).device
inputs = {k: v.to(device) if isinstance(v, torch.Tensor) else v for k, v in inputs.items()}

def trim_generated_ids(input_ids, generated_ids):
    if hasattr(generated_ids, "sequences"):
        generated_ids = generated_ids.sequences
    if generated_ids.dim() == 1:
        return [generated_ids[input_ids.shape[-1]:]]
    if input_ids.dim() == 1:
        input_ids = input_ids.unsqueeze(0)
    return [out_ids[len(in_ids):] for in_ids, out_ids in zip(input_ids, generated_ids)]

with torch.no_grad():
    generated_ids = model.generate(**inputs, max_new_tokens=max_new_tokens, do_sample=False, output_hidden_states=False)
print(processor.batch_decode(
    trim_generated_ids(inputs["input_ids"], generated_ids), skip_special_tokens=True, clean_up_tokenization_spaces=False,
)[0].strip())

Requires one GPU with ~80 GB memory (BF16). Authenticate with hf auth login before downloading a private repo. Frame sampling uses decord. When audio_present=True, a 16 kHz WAV is extracted with ffmpeg (imageio-ffmpeg or a system ffmpeg). summary_idxs | MISSING on load is expected.

Training, Testing, and Evaluation Datasets:

Base Model

This model is a fine-tuned variant of Nemotron 3 Nano Omni 30B-A3B-Reasoning, retaining the same Mamba2-Transformer hybrid MoE architecture and multimodal encoders (CRADIO v4-H vision encoder and Parakeet speech encoder).

Training Dataset

Dataset Name: NVIDIA In-House Tennis Dataset (proprietary)
Data Modality: Video, Text
Video Training Data Size: Less than 10,000 Hours (43,084 point-level video clips)
Text Training Data Size: Less than 1 Billion Tokens (1,312,129 training Q&A examples)
Dataset Size: 1,312,129 training examples
Data Collection Method: Manually-Collected
Labeling Method: Manually-Labeled
Time period for training data collection: 2025
Properties (Quantity, Dataset Descriptions, Sensor(s)): 1,312,129 tennis point video Q&A examples (1,226,081 multiple-choice and 86,048 open-ended) from 43,084 point-level clips across 239 matches and 38 annotation categories. Content is proprietary broadcast and court-capture tennis footage with manually authored English questions and answers. No sensor-derived metadata beyond standard video/audio capture. Linguistic characteristics: English-only tennis-domain questions and answers in multiple-choice and open-ended formats covering shot mechanics, court positioning, player movement, rally structure, score state, rules knowledge, audio cues, and cross-field reasoning.

Testing Dataset

Dataset Name: NVIDIA In-House Tennis Dataset — Test (unseen matches) partition (proprietary)
Dataset Size: 80,872 test examples from 12 fully held-out matches (2,689 point-level clips; no training match overlap)
Data Collection Method: Manually-Collected
Labeling Method: Manually-Labeled
Properties (Quantity, Dataset Descriptions, Sensor(s)): Q&A pairs from 12 fully held-out matches (no training match overlap) — 2,689 point-level clips, 80,872 examples. English tennis-domain labels aligned with the training taxonomy. The corpus also includes a validation split (68,931 examples) and a separate Test (seen matches) partition (69,091 examples from 238 matches represented in training, with match-level overlap only); only Test (unseen matches) was used for reported model testing.

Evaluation Dataset

Dataset Name: NVIDIA In-House Tennis Test (unseen matches) evaluation benchmark (proprietary)
Dataset Size: 80,872 test examples from the Test (unseen matches) partition (12 fully held-out matches) used for MCQ accuracy and open-ended judge scoring
Data Collection Method: Manually-Collected
Labeling Method: Manually-Labeled
Properties (Quantity, Dataset Descriptions, Sensor(s)): Test (unseen matches) — 12 fully held-out matches with no training match overlap (2,689 point-level clips, 80,872 Q&A examples). Evaluated with automated MCQ scoring and LLM-as-judge pass@9 metrics on open-ended responses. English tennis-domain questions across 38 fine-grained categories. Test (seen matches) was not used for reported metrics.

Fine-tuning was performed on top of the base Nemotron 3 Nano Omni weights using the in-house tennis dataset. Pre-training dataset details for the base model are documented in the base Nemotron 3 Nano Omni model card.

Inference:

Acceleration Engine: PyTorch, Hugging Face Transformers, NeMo AutoModel
Test Hardware:

NVIDIA Hopper H100 SXM
NVIDIA Hopper H200 SXM
NVIDIA Blackwell B200 SXM
NVIDIA Ampere A100 80GB SXM
NVIDIA Blackwell GB200 NVL72
NVIDIA Blackwell RTX PRO 6000 SE
NVIDIA Lovelace L40S PCIe 48GB
NVIDIA Blackwell DGX Spark
NVIDIA Blackwell Jetson Thor
NVIDIA Blackwell RTX 5090

Ethical Considerations:

NVIDIA believes Trustworthy AI is a shared responsibility and we have established policies and practices to enable development for a wide array of AI applications. When downloaded or used in accordance with our terms of service, developers should work with their internal model team to ensure this model meets requirements for the relevant industry and use case and addresses unforeseen product misuse.

Please make sure you have proper rights and permissions for all input image and video content; if image or video includes people, personal health information, or intellectual property, the image or video generated will not blur or maintain proportions of image subjects included.

For more detailed information on ethical considerations for this model, please see the Model Card++ Bias, Explainability, Safety & Security, and Privacy Subcards.

Please report model quality, risk, security vulnerabilities or NVIDIA AI Concerns here.