ComfyUI Node
Video Chat 3
Analyze sampled visual frames with VideoChat3-4B. Model path, precision, download, and attention settings are configured directly on this node. Audio is not transcribed. GPU memory is released after execution.
Video Chat 3
- video
- Final answer
- Analysis JSON
- Checkpoint path
◄modelhf://MCG-NJU/VideoChat3-4B►
◄promptCreate a timestamped summary and identify important visible events.►
◄chunk_seconds120►
◄nframes8►
◄max_pixels100352►
◄segment_tokens192►
◄summary_tokens512►
◄chapter_size12►
◄model_path►
◄precisionauto►
◄attention_backendauto►
◄allow_downloadtrue►
◄revision37fa901ec5913f84bc31108ebc1e60ad1903634c►
◄resumetrue►
◄output_prefixvideochat3/analysis►
Categoryvideo/understanding
Inputs (16)
| Name | Type | Default | Description |
|---|---|---|---|
| video | VIDEO | Connect ComfyUI Load Video or another VIDEO-producing node. | |
| model | COMBO | hf://MCG-NJU/VideoChat3-4B | Hugging Face cache or a model discovered in ComfyUI's registered videochat3 paths. |
| prompt | STRING | Create a timestamped summary and identify important visible events. | Question or analysis goal. VideoChat3 analyzes visuals only, not audio. |
| chunk_seconds | FLOAT | 12010–3600 | — |
| nframes | INT | 82–64 | — |
| max_pixels | INT | 100352100352–602112 | — |
| segment_tokens | INT | 19232–1024 | — |
| summary_tokens | INT | 51264–2048 | — |
| chapter_size | INT | 122–64 | — |
| model_path | STRING | Optional absolute path or path relative to a registered videochat3 model root. Overrides model. | |
| precision | COMBO | auto | 4 options: auto, bf16, fp16, fp32 |
| attention_backend | COMBO | auto | 4 options: auto, sdpa, eager, flash_attention_2 |
| allow_download | BOOLEAN | true | Allow the pinned Hugging Face model revision to download during execution. |
| revision | STRING | 37fa901ec5913f84bc31108ebc1e60ad1903634c | Pinned model-code revision. Changing it executes different remote Python code; do not trust revisions from unknown workflows. |
| resume | BOOLEAN | true | — |
| output_prefix | STRING | videochat3/analysis | — |
Outputs (3)
| Name | Type | Description |
|---|---|---|
| Final answer | STRING | — |
| Analysis JSON | STRING | — |
| Checkpoint path | STRING | — |