Y4M_FRAME_MAGIC   115 libavformat/yuv4mpeg.c     m = snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
Y4M_FRAME_MAGIC   355 libavformat/yuv4mpeg.c     if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC))) return -1;