# `PhoenixKit.Modules.Storage.PdfProcessor`
[🔗](https://github.com/BeamLabEU/phoenix_kit/blob/v1.7.165/lib/modules/storage/services/pdf_processor.ex#L1)

Poppler-based PDF processing module.

Handles PDF operations using poppler-utils command-line tools:
- `pdftoppm` - Convert PDF pages to images (JPEG)
- `pdfinfo` - Extract PDF metadata (page count, author, title)

## Dependencies

Requires `poppler-utils` to be installed:
- Debian/Ubuntu: `apt-get install poppler-utils`
- macOS: `brew install poppler`

# `extract_metadata`

Extract metadata from a PDF file using `pdfinfo`.

## Parameters

- `pdf_path` - Path to the PDF file

## Returns

- `{:ok, metadata}` - Map with extracted metadata
- `{:ok, %{}}` - Empty map on failure (graceful degradation)

# `first_page_to_jpeg`

Convert the first page of a PDF to a JPEG image.

Uses `pdftoppm` to render the first page at the specified DPI.

## Parameters

- `pdf_path` - Path to the input PDF file
- `output_prefix` - Prefix for the output JPEG file (e.g., "/tmp/my_pdf")
- `opts` - Options
  - `:dpi` - Resolution in DPI (default: 150)

## Returns

- `{:ok, jpeg_path}` - Path to the generated JPEG file
- `{:error, reason}` - If conversion fails

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*Consult [api-reference.md](api-reference.md) for complete listing*