av_printf_format  176 libavformat/rtpproto.c static av_printf_format(3, 4) void url_add_option(char *buf, int buf_size, const char *fmt, ...)
av_printf_format  148 libavutil/attributes.h #    define av_printf_format(fmtpos, attrpos) __attribute__((__format__(__printf__, fmtpos, attrpos)))
av_printf_format  151 libavutil/attributes.h #    define av_printf_format(fmtpos, attrpos)