added prefix ignore

videocmp_select.sh

@@ -72,6 +72,9 @@ DATESTAMP=$(date +%y%m%d)
 LOG_DIR="$HOME/log"
 LOG_FILE="$LOG_DIR/videocmp_select.${DATESTAMP}.log"
 
+# Add to defaults section
+IGNORE_PATTERN=""
+
 # -------- helpers --------
 need() { command -v "$1" >/dev/null 2>&1 || { echo "Missing dependency: $1" >&2; exit 3; }; }
 v()   { [[ $VERBOSE -eq 1 ]] && echo "[LOG]" "$@" >&2; }
@@ -123,6 +126,7 @@ while (( i < ${#ARGS[@]} )); do
       fi
       ;;
     --recursive|-r)     RECURSIVE=1; i=$((i+1));;
+    --ignore-prefix)    IGNORE_PATTERN="${ARGS[i+1]:-}"; i=$((i+2));;
     --help|-h)
       grep -E '^# ' "$0" | sed 's/^# //' ; exit 0 ;;
     *)
@@ -288,19 +292,52 @@ same_movie_or_skip() { # A B -> 0 if same (SSIM>=thr), else 1
 }
 
 # ----- directory scan helpers/drivers -----
+#scan_and_collect() {
+#  if [[ $RECURSIVE -eq 1 ]]; then
+#    mapfile -t FILES < <(find "$SCAN_DIR" -type f \( -iname '*.mp4' -o -iname '*.m4v' -o -iname '*.mov' -o -iname '*.mkv' \))
+#  else
+#    mapfile -t FILES < <(find "$SCAN_DIR" -maxdepth 1 -type f \( -iname '*.mp4' -o -iname '*.m4v' -o -iname '*.mov' -o -iname '*.mkv' \))
+#  fi
+#}
+
 scan_and_collect() {
   if [[ $RECURSIVE -eq 1 ]]; then
-    mapfile -t FILES < <(find "$SCAN_DIR" -type f \( -iname '*.mp4' -o -iname '*.m4v' -o -iname '*.mov' -o -iname '*.mkv' \))
+    mapfile -t FILES < <(find "$SCAN_DIR" -type f \( -iname '*.mp4' -o -iname '*.m4v' -o -iname '*.mov' -o -iname '*.mkv' \) ! -name '._*')
   else
-    mapfile -t FILES < <(find "$SCAN_DIR" -maxdepth 1 -type f \( -iname '*.mp4' -o -iname '*.m4v' -o -iname '*.mov' -o -iname '*.mkv' \))
+    mapfile -t FILES < <(find "$SCAN_DIR" -maxdepth 1 -type f \( -iname '*.mp4' -o -iname '*.m4v' -o -iname '*.mov' -o -iname '*.mkv' \) ! -name '._*')
   fi
 }
 
 # key = first token of basename (without extension) before the first underscore; lowercased
+#first_underscore_key() {
+#  local base extless key
+#  base="$(basename -- "$1")"
+#  extless="${base%.*}"
+#  if [[ "$extless" == *_* ]]; then
+#    key="${extless%%_*}"
+#  else
+#    key="$extless"
+#  fi
+#  echo "${key,,}"
+#}
+
 first_underscore_key() {
   local base extless key
   base="$(basename -- "$1")"
   extless="${base%.*}"
+  
+  # Strip ignore pattern if specified
+  if [[ -n "$IGNORE_PATTERN" ]]; then
+    # Convert pattern to regex: idx* becomes idx[0-9]+
+    local pattern="$IGNORE_PATTERN"
+    pattern="${pattern//\*/[0-9]+}"  # Replace * with [0-9]+
+    
+    if [[ "$extless" =~ ^${pattern}_ ]]; then
+      # Remove the matched prefix and underscore
+      extless="${extless#"${BASH_REMATCH[0]}"}"
+    fi
+  fi
+  
   if [[ "$extless" == *_* ]]; then
     key="${extless%%_*}"
   else