Update 2025-04-12_09:56:11

convert2opus.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# Number of concurrent ffmpeg processes
+N=${1:-4}
+
+# Create a semaphore with a given number of slots
+semaphore=$(mktemp)
+exec 3<>$semaphore
+for ((i=0; i<N; i++)); do
+    echo >&3
+done
+
+# Debugging function
+debug_log() {
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $@"
+}
+
+# Run ffmpeg command with semaphore locking and delete .wav file on success
+run_ffmpeg() {
+    local file=$1
+    local outfile="${file/%.wav/.opus}"
+
+    # Wait for a slot to become available
+    read -u 3
+    debug_log "Starting conversion: $file"
+
+    if ffmpeg -i "$file" -y -c:a libopus -vbr on -compression_level 5 -ar 48000 -application audio "$outfile"; then
+        debug_log "Completed conversion: $file"
+        debug_log "Deleting original file: $file"
+        rm "$file"
+    else
+        debug_log "Failed conversion: $file"
+    fi
+
+    # Release the slot
+    echo >&3
+}
+
+export -f run_ffmpeg
+export -f debug_log
+
+# Find all .wav files and convert them to .opus in parallel, respecting semaphore, and delete .wav files on success
+find . -maxdepth 1 -type f -name '*.wav' -print0 | xargs -0 -I {} -P $N bash -c 'run_ffmpeg "$@"' _ {}
+
+# Cleanup
+exec 3>&-
+rm -f $semaphore
+