I know how to record the rtsp steam to aac, just like:
ffmpeg -i rtsp://192.168.0.192/110 -acodec copy -t 5 -vn voice.aac
But I don't know how to record the rtsp stream to wav. I have tried the below commands, but they can't work
ffmpeg -i rtsp://192.168.0.192/110 -acodec copy -t 5 -vn voice.wav
ffmpeg -i rtsp://192.168.0.192/110 -acodec copy -t 5 -ar 48000 -ab 128k -ac 2 -f wav voice.wav