hi, 1. In ffmpeg 2.0.2 ,there is no *avcodec_init() *function in libavcodec.but *avcodec_register_all()* is there. 2.In ffmpeg previoud versions both avcodec_init() and avcodec_register_all() are there. so please explain us for these.We want to get effects like bass,treble and eq . Thanks &Regards K DNidu Hyderabad