UniMVU - LoRA Adapters for LLaVA-OneVision Qwen2

Open-source UniMVU release checkpoints for instruction-aware multimodal video understanding. This release covers audio-video QA, 3D QA, and unified multi-task adapters built on top of lmms-lab/llava-onevision-qwen2-0.5b-ov and lmms-lab/llava-onevision-qwen2-7b-ov.

Unlike plain LoRA releases, UniMVU checkpoints also include non_lora_trainables.bin for the extra modality-gating modules. Use the UniMVU loader instead of a PEFT-only PeftModel.from_pretrained(...) workflow.

arXiv

Release Contents

Folder	Scale	Type	Task(s)	Base model
unimvu_0.5B_avqa	0.5B	Single-task	AVQA	lmms-lab/llava-onevision-qwen2-0.5b-ov
unimvu_0.5B_avsd	0.5B	Single-task	AVSD	lmms-lab/llava-onevision-qwen2-0.5b-ov
unimvu_0.5B_music_avqa	0.5B	Single-task	Music-AVQA	lmms-lab/llava-onevision-qwen2-0.5b-ov
unimvu_0.5B_scanqa	0.5B	Single-task	ScanQA	lmms-lab/llava-onevision-qwen2-0.5b-ov
unimvu_0.5B_sqa3d	0.5B	Single-task	SQA3D	lmms-lab/llava-onevision-qwen2-0.5b-ov
unimvu_7B_avqa	7B	Single-task	AVQA	lmms-lab/llava-onevision-qwen2-7b-ov
unimvu_7B_avsd	7B	Single-task	AVSD	lmms-lab/llava-onevision-qwen2-7b-ov
unimvu_7B_music_avqa	7B	Single-task	Music-AVQA	lmms-lab/llava-onevision-qwen2-7b-ov
unimvu_7B_scanqa	7B	Single-task	ScanQA	lmms-lab/llava-onevision-qwen2-7b-ov
unimvu_7B_sqa3d	7B	Single-task	SQA3D	lmms-lab/llava-onevision-qwen2-7b-ov
unimvu_uni_0.5B	0.5B	Unified	Mixed multi-task release	lmms-lab/llava-onevision-qwen2-0.5b-ov
unimvu_uni_7B	7B	Unified	Mixed multi-task release	lmms-lab/llava-onevision-qwen2-7b-ov

The default upload manifest publishes only the final release files:

• adapter_config.json
• adapter_model.safetensors
• config.json
• non_lora_trainables.bin

Intermediate checkpoint-* folders inside unimvu_uni_0.5B are training snapshots and are excluded from the default Hugging Face upload.

Requirements

Use these checkpoints with the open-source UniMVU GitHub repository and install the dependencies from that repo:

git clone <UniMVU GitHub repo>
cd UniMVU
pip install -r requirements.txt
pip install huggingface_hub peft

Download the checkpoint folder you need from this repository, then point the UniMVU evaluation scripts to it with --model-path.

Usage

These checkpoints are intended to be used together with the UniMVU GitHub repository.

1. Clone the UniMVU repository and install its dependencies.
2. Download the checkpoint subfolder you want from this Hugging Face repo.
3. Set the downloaded folder as --model-path in the UniMVU evaluation scripts.
4. Run the appropriate UniMVU evaluation entry point for your task.

Loader Mapping

Release family	model_type	model_arg_name	model_base
Single-task 0.5B adapters	unimvu	VideoFeatModelArgumentsUniMVU	lmms-lab/llava-onevision-qwen2-0.5b-ov
Single-task 7B adapters	unimvu	VideoFeatModelArgumentsUniMVU_7B	lmms-lab/llava-onevision-qwen2-7b-ov
Unified 0.5B adapter	unimvu_uni	VideoFeatModelArgumentsUniMVU_Uni	lmms-lab/llava-onevision-qwen2-0.5b-ov
Unified 7B adapter	unimvu_uni	VideoFeatModelArgumentsUniMVU_Uni_7B	lmms-lab/llava-onevision-qwen2-7b-ov

Evaluation Entry Points

• Use scripts/*_eval_*.sh and unified_eval.py in the UniMVU repository for AVQA, AVSD, Music-AVQA, ScanQA, and SQA3D.
• Use lmms_eval_start.py in the UniMVU repository for MVBench-style evaluation.

License

The released adapters depend on third-party base models and should be used in compliance with the licenses of:

• lmms-lab/llava-onevision-qwen2-0.5b-ov
• lmms-lab/llava-onevision-qwen2-7b-ov

Please also follow the usage terms of the downstream datasets and features used in evaluation.

Citation

If you use UniMVU in your work, please cite:

@inproceedings{ding2026unimvu,
  title={Not All Modalities Are Equal: Instruction-Aware Gating for Multimodal Videos},
  author={Ding, Bonan and Nawaz, Umair and Khan, Ufaq and Shaker, Abdelrahman M. and Khan, Muhammad Haris and Cao, Jiale and Xie, Jin and Khan, Fahad Shahbaz},
  booktitle={Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition},
  year={2026}
}

Acknowledgements

UniMVU builds on the open-source ecosystem around PAVE, Qwen2, LLaVA-OneVision, LMMS-Eval, PEFT, and Transformers.