Convert videos in bulk to H264 baseline/YUV420p, preserve metadata and sanitize filenames

bulk-convert-video.sh

caffeinate &
CAFFEINATE_PID=$!
 
for FILE in *.mkv; do
  OUTPUT=$(echo $FILE | sed -r "s/[ ]*[\.-\(]?(480p|720p|1080p|WEB|576p|HDTV|Xvid).*(\.[a-z4]+)$/\2/I")

  if [ "$OUTPUT" = "$FILE" ]; then
    OUTPUT=$(echo $OUTPUT | sed -r "s/(\.[a-z4]+)$/.converted\1/I")
  fi

  if [ -f "$OUTPUT" ]; then
    echo "File already exists: $OUTPUT"
    echo "Type YES to skip it, anything else to overwrite"
    read REPLY
    if [[ $REPLY =~ ^[Yy]$ ]]; then
       echo "Skipping $OUTPUT"
       continue
    fi
  fi

  ffmpeg -i "$FILE" \
    -acodec aac \
    -vcodec h264 \
    -profile:v baseline \
    -scodec copy \
    -vf format=yuv420p \
    "$OUTPUT"
done

kill $CAFFEINATE_PID