rtl_fm problem with capture audio

HI! I want grab audio from my sdr-device and convert it to h264. I use rtl_fm, check any options, but I can't listen any good sound :( For example: rtl_fm -f 10000000 -s 44100 - | mplayer - -quiet -rawaudio rate=8000:bitrate=44100 -demuxer rawaudio Can you help me? May be anybody know any software for me? Thank you! -- live free or die;