Added option in Spectrogram view to activate a frequency shift in the audio livestream

scripts/livestream.sh

@@ -12,6 +12,10 @@ if [ "$LOGGING_LEVEL" == "info" ] || [ "$LOGGING_LEVEL" == "debug" ];then
   set -x
 fi
 
+if [ "$ACTIVATE_FREQSHIFT_IN_LIVESTREAM" == "true" ]; then
+  FREQSHIFT_OPT='-af rubberband=pitch='${FREQSHIFT_LO}'/'${FREQSHIFT_HI}
+fi
+
 if [ -z ${REC_CARD} ];then
   echo "Stream not supported"
 elif [[ ! -z ${RTSP_STREAM} ]];then
@@ -34,9 +38,11 @@ elif [[ ! -z ${RTSP_STREAM} ]];then
 
   ffmpeg -nostdin -loglevel $LOGGING_LEVEL -ac ${CHANNELS} -i ${SELECTED_RSTP_STREAM} -acodec libmp3lame \
     -b:a 320k -ac ${CHANNELS} -content_type 'audio/mpeg' \
+    ${FREQSHIFT_OPT} \
     -f mp3 icecast://source:${ICE_PWD}@localhost:8000/stream -re
 else
 	ffmpeg -nostdin -loglevel $LOGGING_LEVEL -ac ${CHANNELS} -f alsa -i ${REC_CARD} -acodec libmp3lame \
     -b:a 320k -ac ${CHANNELS} -content_type 'audio/mpeg' \
+    ${FREQSHIFT_OPT} \
     -f mp3 icecast://source:${ICE_PWD}@localhost:8000/stream -re
 fi