Script to split audio files by silence

split_audio_by_silence.sh

set -e

# for f in *.m4a; do ffmpeg -i "$f" -af "silenceremove=stop_periods=-1:stop_duration=0.2:stop_threshold=-40dB:window=1" -y "nosilence/$f"; done

for f in $1/*.wav; do
    fname=$(basename $f)
    segdir=segments.$fname
    rm -rf $segdir
    mkdir $segdir
    for channel in 0 1; do
        ffmpeg -hide_banner -nostdin -y -i $f -af "pan=mono|c0=c$channel,silencedetect=noise=-20dB:d=2" -f null - 2>&1 | grep 'silence_' > $fname.txt
        tail -n +2 $fname.txt | cut -d':' -f2 | cut -d'|' -f1 | xargs -n2 | while read silence_end silence_start; do ffmpeg -loglevel panic -hide_banner -nostdin -y -i $f -map_channel 0.0.$channel -ss "$silence_end" -to "$silence_start" "$segdir/${fname}_${channel}_${silence_end}_${silence_start}.wav" || true; done
        rm $fname.txt
    done
done