Add script to generate jpg

.gitignore

@@ -1,2 +1,4 @@
 
 download/
+
+generated/

modules/mp4_to_jpg.sh

@@ -1,11 +1,33 @@
 #!/bin/bash
 # Options
 PLAYLIST_URL=https://youtube.com/playlist?list=PLwlIgd6_8FLJqgvIgtUye8Jz2jSKLrCAI
+IMAGE_NUM=10
 # ----- Start script -----
 # get playlist name
 PLAYLIST_NAME=$(yt-dlp --no-warnings --dump-single-json --playlist-end 1 $PLAYLIST_URL | jq -r '.title')
 echo "Playlist Name:" $PLAYLIST_NAME
 # get script dir
 SCRIPT_DIR=$(cd $(dirname $0); pwd)
-cd $SCRIPT_DIR/../download/youtube/$PLAYLIST_NAME
-
+mkdir -p $SCRIPT_DIR/../generated/$PLAYLIST_NAME
+INPUT_DIR=$SCRIPT_DIR/../download/youtube/$PLAYLIST_NAME
+OUTPUT_DIR=$SCRIPT_DIR/../generated/$PLAYLIST_NAME
+FILES="$INPUT_DIR/*.mp4"
+for FILEPATH in $FILES; do
+	duration=$(ffprobe -v quiet -of default=noprint_wrappers=1:nokey=1 -show_entries format=duration "$FILEPATH")
+	NAME=$(basename -- "$FILEPATH")
+    EXTENSION="${NAME##*.}"
+    NAME="${NAME%.*}"
+    echo -e "$NAME"
+    start_time=$(bc -l<<<"$duration*0.1")
+    end_time=$(bc -l<<<"$duration*0.9")
+    length_time=$(bc -l<<<"$duration*0.8")
+    rate=$(bc -l<<<"($IMAGE_NUM-1)/$duration/0.8")
+    if LANG=C grep -q -n -v '^[[:cntrl:][:print:]]*$' <<< "$NAME" ; then
+        name_format=$(echo "$NAME" | uconv -x "Fullwidth-Halfwidth")
+        name_en=$(echo $(trans -brief -no-warn -no-ansi ja:en "$name_format") | sed -e "s/\./ /g" | sed -e "s/^The *//" | sed -e "s/^ *//" | sed -e "s/ *$//" | sed -e "s/  / /" | sed -e "s/#//" )
+        NAME=$name_en
+    fi
+    echo "ffmpeg -ss $start_time -t $length_time -i \"$FILEPATH\" -r $rate \"$OUTPUT_DIR/$NAME%06d.jpg\""
+    ffmpeg -ss $start_time -t $length_time -i "$FILEPATH" -r $rate "$OUTPUT_DIR/$NAME%06d.jpg"
+    echo "-----"
+done