av_vlog            50 libavcodec/libx264.c     av_vlog(p, level_map[level], fmt, args);
av_vlog            67 libavutil/log.c     av_vlog(avcl, level, fmt, vl);
av_vlog           124 libavutil/log.h void av_vlog(void*, int level, const char *fmt, va_list);