mirror of
https://github.com/kmein/niveum
synced 2026-03-16 18:21:07 +01:00
115 lines
2.6 KiB
Bash
Executable File
115 lines
2.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Usage:
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# ./mp3_transfer.sh -s 1.3 /mnt/mp3player file1.m4a file2.m4a ...
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set -e
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# Default speed
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SPEED=1.0
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# Parse options
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while getopts ":s:" opt; do
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case $opt in
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s)
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SPEED=$OPTARG
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;;
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\?)
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echo "Invalid option: -$OPTARG" >&2
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exit 1
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;;
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:)
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echo "Option -$OPTARG requires a value." >&2
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exit 1
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;;
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esac
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done
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# Shift past the options
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shift $((OPTIND -1))
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# Check arguments
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if [ "$#" -lt 2 ]; then
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echo "Usage: $0 [-s speed] MOUNT_POINT FILE1 [FILE2 ...]"
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exit 1
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fi
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MOUNT_POINT=$1
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shift
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FILES=("$@")
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# Check mount point exists
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if [ ! -d "$MOUNT_POINT" ]; then
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echo "Error: Mount point '$MOUNT_POINT' does not exist."
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exit 1
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fi
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# Estimate required space
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TOTAL_SIZE=0
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for f in "${FILES[@]}"; do
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if [ ! -f "$f" ]; then
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echo "Warning: File '$f' does not exist, skipping."
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continue
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fi
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# Get file size in bytes
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FILE_SIZE=$(stat --printf="%s" "$f")
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# Estimate mp3 output size: roughly 1/2 of original m4a (adjust if needed)
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TOTAL_SIZE=$((TOTAL_SIZE + FILE_SIZE / 2))
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done
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# Get available space in bytes
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AVAILABLE=$(df --output=avail "$MOUNT_POINT" | tail -n 1)
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AVAILABLE=$((AVAILABLE * 1024)) # df reports in KB
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if [ "$TOTAL_SIZE" -gt "$AVAILABLE" ]; then
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echo "Error: Not enough space on device. Required: $TOTAL_SIZE bytes, Available: $AVAILABLE bytes"
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exit 1
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fi
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echo "Enough space available. Starting conversion..."
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sanitize_filename() {
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local name="$1"
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# Remove path, keep only base name
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name=$(basename "$name" .m4a)
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# Replace spaces and special chars with underscore
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name=$(echo "$name" | tr ' ' '_' | tr -cd '[:alnum:]_-')
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# Truncate to max 50 chars
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echo "${name:0:50}"
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}
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# Convert and copy files
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for f in "${FILES[@]}"; do
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if [ ! -f "$f" ]; then
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continue
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fi
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# Determine the next prefix
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existing_prefixes=$(ls "$MOUNT_POINT" | grep -E '^[0-9].*\.mp3$' | sed -E 's/^([0-9]).*/\1/' | sort -n | uniq)
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for i in {0..9}; do
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if ! echo "$existing_prefixes" | grep -q "^$i$"; then
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PREFIX=$i
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break
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fi
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done
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echo "Using prefix: $PREFIX"
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BASENAME=$(sanitize_filename "$f")
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OUT_PATTERN="$MOUNT_POINT/${PREFIX}%02d_${BASENAME}.mp3"
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echo "Converting '$f' to '$OUT_PATTERN' at speed $SPEED..."
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ffmpeg -i "$f" \
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-filter:a "atempo=$SPEED" -ar 44100 -ac 2 -c:a libmp3lame -b:a 128k \
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-f segment -segment_time 300 \
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"$OUT_PATTERN"
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# Update prefix for next file
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# Count how many segments were created
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SEG_COUNT=$(ls "$MOUNT_POINT" | grep -E "^${PREFIX}[0-9]{2}_" | wc -l)
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PREFIX=$((PREFIX + SEG_COUNT))
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done
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echo "All files processed successfully."
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