vlrec.sh

#!/usr/bin/env bash                                                             
                                                                                
DEV_VIDEO=v4l2:///dev/video2                                                    
# aplay -l                                                                      
DEV_AUDIO=alsa://hw:3,0                                                         
                                                                                
err() {                                                                         
  echo >&2 "ERROR: $*"                                                          
  exit 1                                                                        
}                                                                               
                                                                                
command -v cvlc &>/dev/null || err "cvlc command not found"                     
                                                                                
VIDFILE="${HOME}/cam_$(date +'%Y.%m.%d_%H.%M.%S')_rec.mp4"                      
echo $VIDFILE                                                                   
                                                                                
cvlc ${DEV_VIDEO} \                                                             
  :input-slave=${DEV_AUDIO} \                                                   
  --sout="#transcode{vcodec=h264,acodec=mpga,ab=128,channels=2,samplerate=44100,scodec=none}\
  :file{dst=${VIDFILE},no-overwrite}" \                                         
  --no-sout-all --sout-keep                                                     
                                                                                
echo $VIDFILE