README.md

---
license: other
license_name: bsd-3-clause
license_link: https://github.com/TencentARC/TimeLens/blob/main/LICENSE
language:
- en
task_categories:
- video-text-to-text
pretty_name: TimeLens
size_categories:
- 10K<n<100K
---

# TimeLens-Bench

📑 [**Paper**](https://arxiv.org/abs/2512.14698) | 💻 [**Code**](https://github.com/TencentARC/TimeLens) | 🏠 [**Project Page**](https://timelens-arc-lab.github.io/) | 🤗 [**Model & Data**](https://huggingface.co/collections/TencentARC/timelens) | 🏆 [**TimeLens-Bench Leaderboard**](https://timelens-arc-lab.github.io/#leaderboard)

## ✨ Dataset Description

**TimeLens-Bench** is a comprehensive, high-quality evaluation benchmark for video temporal grounding, proposed in our paper [TimeLens: Rethinking Video Temporal Grounding with Multimodal LLMs](TODO).

During our annotation process, we identified critical quality issues within existing datasets and performed extensive manual corrections. We observed a **dramatic re-ranking of models** on TimeLens-Bench compared to legacy benchmarks, demonstrating that TimeLens-Bench provides **more reliable evaluation** for video temporal grounding.
(See more details in our [paper](TODO) and [project page](https://timelens-arc-lab.github.io/).)
<img src="https://cdn-uploads.huggingface.co/production/uploads/65372e922c6ef949b22c26d9/31s82GO6S5LKlW0-kcIFU.png" alt="performance_comparison_charades-1" width="35%">

### 📊 Dataset Statistics

The benchmark consists of manually refined versions of **three** widely used evaluation datasets for video temporal grounding:

| Refined Dataset | # Videos | Avg. Duration | # Annotations | Source Dataset | Source Dataset Link |
| :--- | :---: | :---: | :---: | :--- | :--- |
| **Charades-TimeLens** | 1313 | 29.6 | 3363 | Charades-STA | https://github.com/jiyanggao/TALL |
| **ActivityNet-TimeLens** | 1455* | 134.9 | 4500 | ActivityNet-Captions | https://cs.stanford.edu/people/ranjaykrishna/densevid/ |
| **QVHighlights-TimeLens** | 1511 | 149.6 | 1541 | QVHighlights | https://github.com/jayleicn/moment_detr |

<small>* To reduce the high evaluation cost from the excessively large ActivityNet Captions, we sampled videos uniformly across duration bins to curate ActivityNet-TimeLens.</small>

## 🚀 Usage

To download and use the benchmark for evaluation, please refer to the instructions in our [**GitHub Repository**](https://github.com/TencentARC/TimeLens#-evaluation-on-timelens-bench).

## 📝 Citation

If you find our work helpful for your research and applications, please cite our paper:

```bibtex
@article{zhang2025timelens,
  title={TimeLens: Rethinking Video Temporal Grounding with Multimodal LLMs},
  author={Zhang, Jun and Wang, Teng and Ge, Yuying and Ge, Yixiao and Li, Xinhao and Shan, Ying and Wang, Limin},
  journal={arXiv preprint arXiv:2512.14698},
  year={2025}
}
```