avplay -f video4linux2 -channel 0 -i /dev/video0 & avplay -f alsa -i plughw:3,0 -nodisp
avconv -f video4linux2 -channel 0 -i /dev/video0 -f alsa -i plughw:3,0 -vcodec mpeg4 -vtag DX50 -b 1200k -r 25 -acodec libmp3lame -ar 44100 -ac 2 -ab 128k -vf yadif,scale=720:480 -y test.avi