refactor: standardize indentation in videncode script

.local/bin/videncode

@@ -44,6 +44,7 @@ OVERWRITE_DIFFERENT=false
 IS_BATCH=false
 INPUT_DIR=""
 INPUT_FILES=()
+AUDIO_MODE="transcode"
 
 # Prints usage information to stdout.
 usage() {
@@ -62,6 +63,7 @@ Usage: $(basename "$0") -i input.mp4 [options]
     --max-h                Maximum height in pixels (default: ${DEFAULT_MAX_H})
     --overwrite-same       Overwrite output even if duration matches input
     --overwrite-different  Overwrite output even if duration differs from input
+    --audio-mode           Audio mode: transcode (default) or copy
     -h, --help             Show this help
 EOF
 }
@@ -75,20 +77,67 @@ parse_args() {
 
 	while [[ $# -gt 0 ]]; do
 		case "$1" in
-      -i|--input) INFILE="$2"; shift 2 ;;
-      -o|--output) OUTFILE="$2"; shift 2 ;;
-      -c|--crf) CRF="$2"; shift 2 ;;
-      -p|--preset) PRESET="$2"; shift 2 ;;
-      -m|--maxrate) MAXRATE="$2"; shift 2 ;;
-      -b|--bufsize) BUFSIZE="$2"; shift 2 ;;
-      --extra) EXTRA_ARGS+=("$2"); shift 2 ;;
-      --max-w) MAX_W="$2"; shift 2 ;;
-      --max-h) MAX_H="$2"; shift 2 ;;
-      --overwrite-same) OVERWRITE_SAME=true; shift ;;
-      --overwrite-different) OVERWRITE_DIFFERENT=true; shift ;;
-      -h|--help) usage; exit 0 ;;
-      --) shift; break ;;
-      *) echo "Unknown argument: $1" >&2; usage; exit 1 ;;
+		-i | --input)
+			INFILE="$2"
+			shift 2
+			;;
+		-o | --output)
+			OUTFILE="$2"
+			shift 2
+			;;
+		-c | --crf)
+			CRF="$2"
+			shift 2
+			;;
+		-p | --preset)
+			PRESET="$2"
+			shift 2
+			;;
+		-m | --maxrate)
+			MAXRATE="$2"
+			shift 2
+			;;
+		-b | --bufsize)
+			BUFSIZE="$2"
+			shift 2
+			;;
+		--extra)
+			EXTRA_ARGS+=("$2")
+			shift 2
+			;;
+		--max-w)
+			MAX_W="$2"
+			shift 2
+			;;
+		--max-h)
+			MAX_H="$2"
+			shift 2
+			;;
+		--overwrite-same)
+			OVERWRITE_SAME=true
+			shift
+			;;
+		--overwrite-different)
+			OVERWRITE_DIFFERENT=true
+			shift
+			;;
+		--audio-mode)
+			AUDIO_MODE="$2"
+			shift 2
+			;;
+		-h | --help)
+			usage
+			exit 0
+			;;
+		--)
+			shift
+			break
+			;;
+		*)
+			echo "Unknown argument: $1" >&2
+			usage
+			exit 1
+			;;
 		esac
 	done
 }
@@ -148,8 +197,13 @@ validate_input_single() {
 
 # Assembles the full ffmpeg command array with all configured options.
 build_ffmpeg_cmd() {
-  # Sets audio flags to copy streams unchanged for fidelity.
-  local audio_flags=("-c:a" "copy")
+	# Sets audio flags to transcode to Opus or copy streams unchanged.
+	local audio_flags
+	if [[ "$AUDIO_MODE" == "transcode" ]]; then
+		audio_flags=("-c:a" "libopus")
+	else
+		audio_flags=("-c:a" "copy")
+	fi
 
 	# Constructs the ffmpeg video scaling filter to fit within max dimensions while preserving aspect ratio.
 	# Scale logic: for landscape (w>h), constrain width to MAX_W and height to MAX_H;