+ imgResize.sh & rotate.sh

dots/bin/imgResize.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+
+# 26.03.04 :: klevstul
+
+
+resize() {
+
+    test_integer() {
+        if ! [[ $1 =~ ^[1-9][0-9]*$ ]]; then
+            echo "error: variable (image width) must be an integer"
+            exit 1
+        fi
+    }
+
+    filename=$1                                     # ~/syncDir/0_downloads/frodeKlevstul.jpg
+    extension="${filename##*.}"                     # jpg
+    basename_without_ext="${filename%.*}"           # ~/syncDir/0_downloads/frodeKlevstul
+    basename_only="${basename_without_ext##*/}"     # frodeKlevstul
+
+    width=$2
+    width=${width:=1000}                            # default: 1000
+    test_integer ${width}                 # make sure the input (if given from the user) is valid
+
+    # scale=1000:-1:    resizes the image to a width of 1000 pixels, automatically calculating the height to preserve the original aspect ratio.
+    # -q:v 90:          sets the jpeg quality to 90 (lower values mean higher quality; 90 is a high quality setting for jpeg).
+
+    ffmpeg -i ${filename} -vf "scale=${width}:-1" -q:v 90 ${basename_without_ext}_rzd.jpg
+
+}
+
+
+this_file_name=`basename "$0"`
+if [ $# -lt 1 ]; then
+    echo "error: path to file is missing."
+    echo "usage: '$this_file_name [path_to_file] ([width (1000)])'"
+    exit 1
+fi
+
+resize $1 $2