# Command Line Tools Usage Instructions

## View Help Information
To view help information for MinerU command line tools, you can use the `--help` parameter. Here are help information examples for various command line tools:
```bash
mineru --help
Usage: mineru [OPTIONS]

Options:
  -v, --version                   Show version and exit
  -p, --path PATH                 Input file path or directory (required)
  -o, --output PATH               Output directory (required)
  -m, --method [auto|txt|ocr]     Parsing method: auto (default), txt, ocr (pipeline and hybrid* backend only)
  -b, --backend [pipeline|hybrid-auto-engine|hybrid-http-client|vlm-auto-engine|vlm-http-client]
                                  Parsing backend (default: hybrid-auto-engine)
  -l, --lang [ch|ch_server|ch_lite|en|korean|japan|chinese_cht|ta|te|ka|th|el|latin|arabic|east_slavic|cyrillic|devanagari]
                                  Specify document language (improves OCR accuracy, pipeline and hybrid* backend only)
  -u, --url TEXT                  Service address when using http-client
  -s, --start INTEGER             Starting page number for parsing (0-based)
  -e, --end INTEGER               Ending page number for parsing (0-based)
  -f, --formula BOOLEAN           Enable formula parsing (default: enabled)
  -t, --table BOOLEAN             Enable table parsing (default: enabled)
  -d, --device TEXT               Inference device (e.g., cpu/cuda/cuda:0/npu/mps, pipeline and vlm-transformers backend only)
  --vram INTEGER                  Maximum GPU VRAM usage per process (GB) (pipeline backend only)
  --source [huggingface|modelscope|local]
                                  Model source, default: huggingface
  --help                          Show help information
```
```bash
mineru-api --help
Usage: mineru-api [OPTIONS]

Options:
  --host TEXT     Server host (default: 127.0.0.1)
  --port INTEGER  Server port (default: 8000)
  --reload        Enable auto-reload (development mode)
  --help          Show this message and exit.
```
```bash
mineru-gradio --help
Usage: mineru-gradio [OPTIONS]

Options:
  --enable-example BOOLEAN        Enable example files for input. The example
                                  files to be input need to be placed in the
                                  `example` folder within the directory where
                                  the command is currently executed.
  --enable-http-client BOOLEAN    Enable http-client backend to link openai-
                                  compatible servers.
  --enable-api BOOLEAN            Enable gradio API for serving the
                                  application.
  --max-convert-pages INTEGER     Set the maximum number of pages to convert
                                  from PDF to Markdown.
  --server-name TEXT              Set the server name for the Gradio app.
  --server-port INTEGER           Set the server port for the Gradio app.
  --latex-delimiters-type [a|b|all]
                                  Set the type of LaTeX delimiters to use in
                                  Markdown rendering: 'a' for type '$', 'b' for
                                  type '()[]', 'all' for both types.
  --help                          Show this message and exit.
```

## Environment Variables Description

Some parameters of MinerU command line tools have equivalent environment variable configurations. Generally, environment variable configurations have higher priority than command line parameters and take effect across all command line tools.
Here are the environment variables and their descriptions:

- `MINERU_DEVICE_MODE`:
    * Used to specify inference device
    * supports device types like `cpu/cuda/cuda:0/npu/mps`
    * only effective for `pipeline` and `vlm-transformers` backends.
  
- `MINERU_VIRTUAL_VRAM_SIZE`: 
    * Used to specify maximum GPU VRAM usage per process (GB)
    * only effective for `pipeline` backend.
  
- `MINERU_MODEL_SOURCE`: 
    * Used to specify model source
    * supports `huggingface/modelscope/local`
    * Default is `huggingface`; you can switch via an environment variable to `modelscope` to use a domestic acceleration mirror, or switch to `local` to use a local model.

  
- `MINERU_TOOLS_CONFIG_JSON`: 
    * Used to specify configuration file path
    * defaults to `mineru.json` in user directory, can specify other configuration file paths through environment variables.
  
- `MINERU_FORMULA_ENABLE`:
    * Used to enable formula parsing
    * defaults to `true`, can be set to `false` through environment variables to disable formula parsing.
  
- `MINERU_FORMULA_CH_SUPPORT`:
    * Used to enable Chinese formula parsing optimization (experimental feature)
    * Default is `false`, can be set to `true` via environment variable to enable Chinese formula parsing optimization.
    * Only effective for `pipeline` backend.
  
- `MINERU_TABLE_ENABLE`:
    * Used to enable table parsing
    * Default is `true`, can be set to `false` via environment variable to disable table parsing.

- `MINERU_TABLE_MERGE_ENABLE`:
    * Used to enable table merging functionality
    * Default is `true`, can be set to `false` via environment variable to disable table merging functionality.

- `MINERU_PDF_RENDER_TIMEOUT`:
    * Used to set the timeout (in seconds) for rendering PDFs to images.
    * Default is `300` seconds; you can set a different value via an environment variable to adjust the rendering timeout.
    * Only effective on Linux and macOS systems.

- `MINERU_PDF_RENDER_THREADS`:
    * Used to set the number of threads used when rendering PDFs to images.
    * Default is `4`; you can set a different value via an environment variable to adjust the number of threads for image rendering.
    * Only effective on Linux and macOS systems.

- `MINERU_INTRA_OP_NUM_THREADS`:
    * Used to set the intra_op thread count for ONNX models, affects the computation speed of individual operators
    * Default is `-1` (auto-select), can be set to other values via environment variable to adjust the thread count.

- `MINERU_INTER_OP_NUM_THREADS`:
    * Used to set the inter_op thread count for ONNX models, affects the parallel execution of multiple operators
    * Default is `-1` (auto-select), can be set to other values via environment variable to adjust the thread count.

- `MINERU_HYBRID_BATCH_RATIO`:
    * Used to set the batch ratio for small model processing in `hybrid-*` backends.
    * Commonly used in `hybrid-http-client`, it allows adjusting the VRAM usage of a single client by controlling the batch ratio of small models.
    * Single Client VRAM Size | MINERU_HYBRID_BATCH_RATIO
      ------------------------|--------------------------
      <= 6   GB               | 8
      <= 4.5 GB               | 4
      <= 3   GB               | 2
      <= 2.5 GB               | 1

- `MINERU_HYBRID_FORCE_PIPELINE_ENABLE`:
    * Used to force the text extraction part in `hybrid-*` backends to be processed using small models.
    * Defaults to `false`. Can be set to `true` via environment variable to enable this feature, thereby reducing hallucinations in certain extreme cases.

- `MINERU_VL_MODEL_NAME`:
    * Used to specify the model name for the vlm/hybrid backend, allowing you to designate the model required for MinerU to run when multiple models exist on a remote openai-server.

- `MINERU_VL_API_KEY`:
    * Used to specify the API Key for the vlm/hybrid backend, enabling authentication on the remote openai-server.