wip

create_chunks.py

@@ -1,39 +0,0 @@
-#!/usr/bin/env python3
-import os
-import subprocess
-import datetime
-import pytz
-
-OUTDIR = "chunks"
-CHUNK_SECONDS = 10800  # 3 Stunden
-
-os.makedirs(OUTDIR, exist_ok=True)
-
-def record_section():
-    tz = pytz.timezone("Europe/Berlin")
-    now = datetime.datetime.now(tz)
-    timestamp = now.strftime("%Y%m%d-%H%M%S")
-    filename = os.path.join(OUTDIR, f"{timestamp}.flac")
-    print(f"🎙️ Starte Aufnahme: {filename}")
-
-    cmd = [
-        "ffmpeg",
-        "-f", "pulse",
-        "-i", "alsa_input.usb-HANMUS_USB_AUDIO_24BIT_2I2O_1612310-00.analog-stereo",
-        "-ac", "1",
-        "-ar", "96000",
-        "-sample_fmt", "s32", # gerät kann nur 24bit, aber flac kann nur 32bit container
-        "-t", str(CHUNK_SECONDS),
-        "-c:a", "flac",
-        "-compression_level", "12",
-        filename
-    ]
-    subprocess.run(cmd)
-    print(f"✅ Aufnahme abgeschlossen: {filename}")
-
-def main():
-    while True:
-        record_section()
-
-if __name__ == "__main__":
-    main()

process

@@ -12,9 +12,9 @@ import shutil
 RECORDINGS_DIR = "recordings"
 PROCESSED_RECORDINGS_DIR = "recordings/processed"
 DETECTIONS_DIR = "events"
-DETECT_FREQUENCY_FROM = 210
-DETECT_FREQUENCY_TO = 212
-CLIP_SECONDS = 1
+DETECT_FREQUENCY_FROM = 208
+DETECT_FREQUENCY_TO = 214
+CLIP_SECONDS = 3
 THRESHOLD_BASE = 0.1
 OCTAVE_FACTOR = 0.1
 CLIP_PADDING_BEFORE = 1
@@ -30,12 +30,14 @@ def process_chunk(filename):
 
     print(info)
 
-    for block in soundfile.blocks(path, blocksize=blocksize, overlap=0):
+    for num, block in enumerate(soundfile.blocks(path, blocksize=blocksize, overlap=int(blocksize*0.8))):
         strengths = fft(block)
         labels = fftfreq(len(block), d=1/samplerate)
         # get the frequency with the highest strength
         max_freq = labels[np.argmax(np.abs(strengths))]
-        print(max_freq)
+        if DETECT_FREQUENCY_FROM <= max_freq <= DETECT_FREQUENCY_TO:
+            print(f'{num}: {max_freq:.1f}')
+
 
 def main():
     os.makedirs(RECORDINGS_DIR, exist_ok=True)

record

@@ -0,0 +1,33 @@
+#!/bin/sh
+
+mkdir -p recordings
+
+while true
+do
+    # get date in ISO 8601 format with nanoseconds
+
+    OS=$(uname)
+
+    if [ "$OS" = "Darwin" ]; then
+        DATE=$(gdate --iso-8601=ns)
+    elif [ "$OS" = "Linux" ]; then
+        DATE=$(date --iso-8601=ns)
+    else
+        echo "Unsupported OS: $OS"
+        exit 2
+    fi
+
+    # record audio using ffmpeg
+
+    ffmpeg \
+        -y \
+        -f pulse \
+        -i "alsa_input.usb-HANMUS_USB_AUDIO_24BIT_2I2O_1612310-00.analog-stereo" \
+        -ac 1 \
+        -ar 96000 \
+        -sample_fmt s32 \
+        -t "3600" \
+        -c:a flac \
+        -compression_level 12 \
+        "recordings/$DATE.flac"
+done