Add files via upload

mk-index-jpg.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+# 2022 Dave Bechtel
+# Create an index .jpg with thumbnails for images in multiple subdirs, one index jpg per subdir
+# REF: https://ostechnix.com/how-to-create-a-montage-from-images-in-linux/
+
+# CD to where you need to be b4 running
+# cd $HOME/Pictures $ $0
+
+# REQUIRES: imagemagick , findutils , parallel  
+
+# del existing montage jpg first so we dont do Inception
+outfile=0montage.jpg
+
+set -u # abort on uninit var
+echo "Precleaning $outfile in this dir tree"
+find . -name "$outfile" -print -delete
+set +u
+
+if [ "$1" = "" ]; then
+  echo "Single tasking"
+  time find . -type d -print -exec montage -geometry 192x192\>+1+1 -set label '%f\n%wx%h' {}/\* {}/$outfile \;
+else
+  echo "Using multi-cpu"
+  time find . -type d -print \
+    | parallel -I@ --max-args 1 \
+      montage -geometry 192x192\>+1+1 -set label '%f\n%wx%h' @/\* @/$outfile
+# WARNING be aware that montage can use MULTIPLE GIGS OF RAM  
+fi
+
+# ^ Find directories starting in this dir (and processing current directory
+# as well), print what it finds to somewhat track progress, run montage on
+# the files in that dir (you need to escape the star to avoid bash
+# autocomplete) with resulting output file named 0montage.jpg in the found dir. 
+# PROTIP Prefacing the filename with 0 should sort it to the top in a file manager
+
+date
+
+exit;
+
+Use "find * " to only process subdirs, not curdir
+
+REF: https://opensource.com/article/18/5/gnu-parallel
+
+$ find . -name "*jpeg" | parallel -I% --max-args 1 convert % %.png
+-I% creates a placeholder, called %, to stand in for whatever find hands over to Parallel.