av_next_option    326 libavcodec/opt.c     while((opt= av_next_option(obj, opt))){
av_next_option    411 libavcodec/opt.c     while ((opt = av_next_option(s, opt)) != NULL) {
av_next_option    151 libavcodec/opt.h const AVOption *av_next_option(void *obj, const AVOption *last);