static int scan_option_line(char *cp,char *tag,char *val);
static int load_defaults(const char *path, const char *type,
char *codec, char *codec_options, int len);
static int scan_option_line(char *cp,char *tag,char *val);
static int load_defaults(const char *path, const char *type,
char *codec, char *codec_options, int len);