How to change the recorded files to MONO

[dalogue1]

Since the BirdNET-Pi only identifies off of a single microphone, and it makes the captured files larger, how could the birdnet_recording.sh be modified to capture MONO instead of STEREO?

I believe the birdnet_recording.sh is recording using ffmpeg. Would I just need to modify the FFMPEG_PARAMS string to change from STEREO to MONO?

Possibly change the following line to reduce the channels from 2 to 1.

  FFMPEG_PARAMS+="-vn -thread_queue_size 512 -i ${i} -map ${MAP_ID}:a:0 -t ${RECORDING_LENGTH} -acodec pcm_s16le -ac 2 -ar 48000 file:${RECS_DIR}/StreamData/$(date "+%F")-birdnet-RTSP_${RTSP_STREAMS_STARTED_COUNT}-$(date "+%H:%M:%S").wav "

changes to

  FFMPEG_PARAMS+="-vn -thread_queue_size 512 -i ${i} -map ${MAP_ID}:a:0 -t ${RECORDING_LENGTH} -acodec pcm_s16le -ac 1 -ar 48000 file:${RECS_DIR}/StreamData/$(date "+%F")-birdnet-RTSP_${RTSP_STREAMS_STARTED_COUNT}-$(date "+%H:%M:%S").wav "

-ac 2 (stereo) is changed to -ac 1 (mono)

[alexbelgium]

Hi, I think that's what this options does Audio Channels: Set Channels to the number of channels supported by your sound card. 32 max. in the advanced settings

[dalogue1]

Thank you. I changed the option to 1 instead of 2 and the file is half the size.