Y4M_MAGIC          55 libavformat/yuv4mpegdec.c     if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC)))
Y4M_MAGIC          59 libavformat/yuv4mpegdec.c     for (tokstart = &header[strlen(Y4M_MAGIC) + 1];
Y4M_MAGIC         307 libavformat/yuv4mpegdec.c     if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0)
Y4M_MAGIC         131 libavformat/yuv4mpegenc.c                  Y4M_MAGIC, width, height, raten, rated, inter,