Recover PDF text truncated by inline images using PyMuPDF fallback

[Muhtasim-Munif-Fahim]

Fixes #1870.

Some PDFs with inline images cause pdfplumber/pdfminer to silently drop text that appears after the image. When the primary extraction path returns a much shorter body on image-bearing pages, this change optionally retries with PyMuPDF and prefers that output if it is substantially longer.

Also documents the optional pymupdf extra and adds a regression test that simulates the truncation path.

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[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds an optional PyMuPDF-based text extraction fallback to improve PDF conversion when primary extractors (pdfplumber/pdfminer) appear to return truncated text, particularly around inline images.

Changes:

• Introduces an optional PyMuPDF extraction path and heuristics to prefer it when primary output looks truncated.
• Adds a regression test to validate choosing PyMuPDF when primary extraction misses post-image text.
• Documents and packages PyMuPDF as an optional extra (and includes it in the all extra).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
packages/markitdown/tests/test_module_misc.py	Adds a test that simulates truncation and asserts the PyMuPDF path is preferred.
packages/markitdown/src/markitdown/converters/_pdf_converter.py	Adds PyMuPDF extraction helper and selection heuristics based on images + output length.
packages/markitdown/pyproject.toml	Adds pymupdf optional dependency (extra + included in all).
packages/markitdown/README.md	Documents how to install the optional PyMuPDF extra.

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