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Momentor: Advancing Video Large Language Model with Fine-Grained Temporal Reasoning

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arxiv 2402.11435 v2 pith:5EXARGAR submitted 2024-02-18 cs.CV

Momentor: Advancing Video Large Language Model with Fine-Grained Temporal Reasoning

classification cs.CV
keywords momentortasksvideofine-grainedlocalizationcomprehensiondatademonstrate
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Large Language Models (LLMs) demonstrate remarkable proficiency in comprehending and handling text-based tasks. Many efforts are being made to transfer these attributes to video modality, which are termed Video-LLMs. However, existing Video-LLMs can only capture the coarse-grained semantics and are unable to effectively handle tasks related to comprehension or localization of specific video segments. In light of these challenges, we propose Momentor, a Video-LLM capable of accomplishing fine-grained temporal understanding tasks. To support the training of Momentor, we design an automatic data generation engine to construct Moment-10M, a large-scale video instruction dataset with segment-level instruction data. We train Momentor on Moment-10M, enabling it to perform segment-level reasoning and localization. Zero-shot evaluations on several tasks demonstrate that Momentor excels in fine-grained temporally grounded comprehension and localization.

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Cited by 18 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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    cs.CV 2026-07 conditional novelty 7.0

    TimeLens2 shows that a compact video MLLM can localize multiple evidence intervals in long videos by training on verified interval labels and a Wasserstein-based time-distance reward.

  2. Parallelized Autoregressive Decoding for Omni-Modal Dense Video Captioning

    cs.CV 2026-07 accept novelty 7.0

    Latent event planning plus event-factorized attention restructures the AR dependency graph so dense video captions can be decoded in parallel with higher accuracy and 3–4× wall-clock speedup.

  3. EvoGround: Self-Evolving Video Agents for Video Temporal Grounding

    cs.CV 2026-05 unverdicted novelty 7.0

    A proposer-solver agent pair achieves supervised-level video temporal grounding and fine-grained captioning from 2.5K unlabeled videos via self-reinforcing evolution.

  4. MarkIt: Training-Free Visual Markers for Precise Video Temporal Grounding

    cs.MM 2026-04 unverdicted novelty 7.0

    MarkIt uses a query-to-mask bridge with open-vocabulary segmentation to add visual markers and frame indices to videos, enabling Vid-LLMs to achieve state-of-the-art temporal grounding on moment retrieval and highligh...

  5. A Paradigm Shift: Fully End-to-End Training for Temporal Sentence Grounding in Videos

    cs.CV 2026-04 unverdicted novelty 7.0

    Fully end-to-end training with a sentence-conditioned adapter outperforms frozen-backbone baselines for localizing video segments that match sentence queries.

  6. TimePLE: Rethinking Temporal Representation for Video Temporal Grounding

    cs.CV 2026-07 conditional novelty 6.0

    TimePLE predicts a whole video interval as a joint distribution over a position-duration square, rather than predicting start and end separately, and reports higher mIoU across four VTG benchmarks.

  7. MarkIt: Training-Free Visual Markers for Precise Video Temporal Grounding

    cs.MM 2026-04 unverdicted novelty 6.0

    MarkIt converts videos into query-conditioned marked versions via a linguistic-parsing and open-vocabulary segmentation bridge that embeds instance masks, semantic markers, and frame indices to improve Vid-LLM tempora...

  8. UniversalVTG: A Universal and Lightweight Foundation Model for Video Temporal Grounding

    cs.CV 2026-04 unverdicted novelty 6.0

    UniversalVTG is a lightweight foundation model for video temporal grounding that achieves state-of-the-art results across five benchmarks while being over 100 times smaller than recent MLLM-based methods.

  9. Detector-Empowered Video Large Language Model for Efficient Spatio-Temporal Grounding

    cs.CV 2025-12 conditional novelty 6.0

    DEViL offloads spatial grounding to a detector via a distilled reference-semantic token and temporal consistency regularization, reaching 43.1% m_vIoU at 14.33 FPS on HC-STVG.

  10. EgoExo-Con: Exploring View-Invariant Video Temporal Understanding

    cs.CV 2025-10 conditional novelty 6.0

    Most Video-LLMs answer temporal questions far less consistently when the same event is shown from ego and exo views, and a GRPO variant with a reasoning-similarity reward partially closes the gap.

  11. VC-Inspector: Advancing Reference-free Evaluation of Video Captions with Factual Analysis

    cs.CV 2025-09 unverdicted novelty 6.0

    VC-Inspector introduces a lightweight open-source LMM and a controllable factual-error generation framework that achieves state-of-the-art correlation with human judgments on reference-free video caption evaluation.

  12. DATE: Dynamic Absolute Time Enhancement for Long Video Understanding

    cs.CV 2025-09 conditional novelty 6.0

    DATE combines inference-time timestamp token injection with a caption-rewritten, temporally regularized CLIP sampling strategy to improve absolute time reasoning and event localization in long videos.

  13. Strefer: Empowering Video LLMs with Space-Time Referring and Reasoning via Synthetic Instruction Data

    cs.CV 2025-09 conditional novelty 6.0

    Adding Strefer's synthetic space-time reference questions to video instruction tuning improves mask-referred description/QA, timestamp QA, and temporal reasoning over a video-LLM baseline.

  14. Multimodal Large Language Model-Enabled Video Translation: A Role-Oriented Survey

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    MLLM-enabled video translation is usefully framed as three roles—Semantic Reasoner, Expressive Performer, and Visual Synthesizer—rather than a cascade of ASR, MT, TTS, and lip-sync.

  15. How Should Video LLMs Output Time? An Analysis of Efficient Temporal Grounding Paradigms

    cs.CV 2026-04 unverdicted novelty 5.0

    A controlled study on compact video LLMs finds that continuous temporal decoding delivers the strongest accuracy-efficiency trade-off for video temporal grounding across three benchmarks.

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    cs.CV 2024-12 unverdicted novelty 5.0

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  17. Multimodal Large Language Model-Enabled Video Translation: A Role-Oriented Survey

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  18. VideoLLaMA 3: Frontier Multimodal Foundation Models for Image and Video Understanding

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