From d09ef138cbe0223a188c6880fc4c8a0559a5cfe6 Mon Sep 17 00:00:00 2001
From: rdrew <rdrew@upei.ca>
Date: Thu, 5 Feb 2026 11:37:00 -0400
Subject: [PATCH] [nb] Edit: cli_commands.md

---
 cli_commands.md | 47 +++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 41 insertions(+), 6 deletions(-)

diff --git a/cli_commands.md b/cli_commands.md
index 78169e2..ea89792 100644
--- a/cli_commands.md
+++ b/cli_commands.md
@@ -33,11 +33,46 @@ gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 \
 
 (batch)
 
-for f in *.PDF; do
-    gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 \
+# In the folder with your PDFs
+mkdir downsampled
+
+for f in *.pdf *.PDF; do
+    [ -f "$f" ] || continue
+    gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen \
        -dNOPAUSE -dBATCH \
-       -dDownsampleColorImages=true -dColorImageResolution=72 \
-       -dDownsampleGrayImages=true -dGrayImageResolution=72 \
-       -dDownsampleMonoImages=true -dMonoImageResolution=72 \
-       -sOutputFile="output_pdfs/$f" "$f"
+       -sOutputFile="downsampled/${f%.pdf}_72dpi.pdf" \
+       "$f"
+done
+# In the folder that contains your original PDFs
+
+mkdir -p downsampled
+
+for f in *.pdf *.PDF; do
+    [ -f "$f" ] || continue
+    gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen \
+       -dNOPAUSE -dBATCH -dQUIET \
+       -sOutputFile="downsampled/$f" \
+       "$f"
+done
+
+# check current dpi
+for f in *.pdf *.PDF; do
+    echo "=== Images in: $f ==="
+    pdfimages -list "$f"
+    echo ""
+done
+# Creates (or overwrites) images_list.txt in the current directory
+for f in *.pdf *.PDF; do
+    if [ -f "$f" ]; then
+        echo "=== Images in: $f ===" >> images_list.txt
+        pdfimages -list "$f"       >> images_list.txt
+        echo ""                    >> images_list.txt
+    fi
+done
+# scan for ccitt encoding
+for f in *.pdf *.PDF; do
+    [ -f "$f" ] || continue
+    if pdfimages -list "$f" 2>/dev/null | grep -q " ccitt "; then
+        echo "$f uses CCITT"
+    fi
 done