# Qwen3-Omni: Offline inference

Source <https://github.com/vllm-project/vllm-omni/tree/main/examples/offline_inference/qwen3_omni>.


## Setup
Use `--deploy-config` for deployment overrides such as stage memory allocation.
See the [pipeline and deploy configuration documentation](https://docs.vllm.ai/projects/vllm-omni/en/latest/configuration/stage_configs/).

## Run examples

### Multiple Prompts
Get into the example folder
```bash
cd examples/offline_inference/qwen3_omni
```
Then run the command below. Note: for processing large volume data, it uses py_generator mode, which will return a python generator from Omni class.
```bash
bash run_multiple_prompts.sh
```
### Single Prompt
Get into the example folder
```bash
cd examples/offline_inference/qwen3_omni
```
Then run the command below.
```bash
bash run_single_prompt.sh
```
If you have not enough memory, you can set thinker with tensor parallel. Just run the command below.
```bash
bash run_single_prompt_tp.sh
```

### Modality control
If you want to control output modalities, e.g. only output text, you can run the command below:
```bash
python end2end.py --output-wav output_audio \
                  --query-type use_audio \
                  --modalities text
```

#### Using Local Media Files
The `end2end.py` script supports local media files (audio, video, image) via command-line arguments:

```bash
# Use local video file
python end2end.py --query-type use_video --video-path /path/to/video.mp4

# Use local image file
python end2end.py --query-type use_image --image-path /path/to/image.jpg

# Use local audio file
python end2end.py --query-type use_audio --audio-path /path/to/audio.wav

# Combine multiple local media files
python end2end.py --query-type mixed_modalities \
    --video-path /path/to/video.mp4 \
    --image-path /path/to/image.jpg \
    --audio-path /path/to/audio.wav
```

If media file paths are not provided, the script will use default assets. Supported query types:
- `use_video`: Video input
- `use_image`: Image input
- `use_audio`: Audio input
- `text`: Text-only query
- `multi_audios`: Multiple audio inputs
- `mixed_modalities`: Combination of video, image, and audio inputs

### Async-chunk (offline)

For true stage-level concurrency -- where downstream stages (Talker, Code2Wav)
start **before** the upstream stage (Thinker) finishes -- use the async_chunk
example. This requires:

1. A deploy YAML with ``async_chunk: true`` (for example, an overlay based on
   ``vllm_omni/deploy/qwen3_omni_moe.yaml``).
2. Hardware that matches the config (e.g. 2x H100 for the default 3-stage
   config).

The async_chunk example uses ``AsyncOmni`` instead of the synchronous ``Omni``
class, which enables the async orchestrator to receive stage-0 intermediate
outputs and trigger downstream stages early. Chunk data flows directly between
stage workers via the in-worker ``OmniChunkTransferAdapter`` / connector,
**not** through the orchestrator.

#### Single prompt
```bash
cd examples/offline_inference/qwen3_omni
bash run_single_prompt_async_chunk.sh
```

#### Multiple prompts with concurrency control
```bash
bash run_multiple_prompts_async_chunk.sh --max-in-flight 4
```

#### Text-only output (skip audio generation)
```bash
python end2end_async_chunk.py --query-type text --modalities text
```

#### Custom deploy config
```bash
python end2end_async_chunk.py \
    --query-type use_audio \
    --deploy-config /path/to/your_async_chunk.yaml
```

> **Note**: The synchronous ``end2end.py`` (using ``Omni``) is still the
> recommended entry point for non-async-chunk workflows. Only use the
> async_chunk example when you need the stage-level concurrency semantics
> described in PR #962 / #1151.

## Example materials

??? abstract "end2end.py"
    ``````py
    --8<-- "examples/offline_inference/qwen3_omni/end2end.py"
    ``````
??? abstract "end2end_async_chunk.py"
    ``````py
    --8<-- "examples/offline_inference/qwen3_omni/end2end_async_chunk.py"
    ``````
??? abstract "run_multiple_prompts.sh"
    ``````sh
    --8<-- "examples/offline_inference/qwen3_omni/run_multiple_prompts.sh"
    ``````
??? abstract "run_multiple_prompts_async_chunk.sh"
    ``````sh
    --8<-- "examples/offline_inference/qwen3_omni/run_multiple_prompts_async_chunk.sh"
    ``````
??? abstract "run_single_prompt.sh"
    ``````sh
    --8<-- "examples/offline_inference/qwen3_omni/run_single_prompt.sh"
    ``````
??? abstract "run_single_prompt_async_chunk.sh"
    ``````sh
    --8<-- "examples/offline_inference/qwen3_omni/run_single_prompt_async_chunk.sh"
    ``````
??? abstract "run_single_prompt_tp.sh"
    ``````sh
    --8<-- "examples/offline_inference/qwen3_omni/run_single_prompt_tp.sh"
    ``````
??? abstract "text_prompts_10.txt"
    ``````txt
    --8<-- "examples/offline_inference/qwen3_omni/text_prompts_10.txt"
    ``````