Progress Renderer (Steam | GitHub) is a brilliant mod that takes a screenshot once a day, and dumps it into a folder.
The following bash script can be used to generate an mp4 timelapse of the screenshots. Simply specify a region to cut out of the screenshots, and some other parameters, and run the script in the working directory.
#!/bin/bash
###########################
# Video resolution (must be even)
SIZE=2272x1472
# Video FPS
FPS=10
# Region to export
CROP=4544x2944+4064+3360
# Output file
OUT=~/Videos/rimworldvid.mp4
# TMP Location
TMP=/tmp/rimworldvid
###########################
echo "================= CONFIG ====================="
echo "Region: $CROP"
echo "Output: $OUT"
echo "Resolu: $SIZE @ $FPS fps"
echo "Tmp: $TMP/"
echo "============================================="
echo ""
mkdir -p $TMP
for filename in *.jpg; do
if [ ! -f "$TMP/$filename" ]; then
echo "Cropping $filename"
convert $filename -crop $CROP -resize $SIZE "$TMP/$filename" || exit $?
fi
done || exit $?
echo "Rendering mp4"
cd $TMP
ffmpeg -framerate $FPS -pattern_type glob -i '*.jpg' "$OUT"