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docs: auto output type falls back to Ghostscript for PDF/A (#1561)

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James R. Barlow
2026-06-30 01:12:08 -07:00
parent 43d3448709
commit 1aec92b919
2 changed files with 18 additions and 3 deletions
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docs/advanced.md
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@@ -566,9 +566,12 @@ fast "speculative" PDF/A conversion that avoids Ghostscript when possible:
3. If validation passes, Ghostscript is skipped entirely
4. If validation fails or verapdf is unavailable, falls back to Ghostscript
This approach is faster and avoids some Ghostscript limitations (such as
image transcoding), but only works for PDFs that are already "mostly"
PDF/A compliant.
This fast path avoids some Ghostscript limitations (such as image
transcoding) and is used whenever it can produce valid PDF/A. When it
cannot — for example when veraPDF is not installed, or the input needs real
conversion — `auto` falls back to Ghostscript so that it still produces
PDF/A by default, matching OCRmyPDF 16 and earlier. If even Ghostscript
cannot safely produce PDF/A, `auto` outputs a regular PDF instead of failing.
### PDF/A conversion flow