format help

@@ -1706,8 +1706,9 @@ int main(int argc, char * argv[])
 		printf("   run ffmpeg to merge video files to one pip video according to record info file,\nusage:");
 		printf("\n   %s record_info_filename [-p] [-k]", argv[0]);
 		printf("\n   -p :only print the command,don't run ffmpeg");
-		printf("\n   -k :keep the temp files\n");
-		printf("\n   -d :individual files for different time segment\n");
+		printf("\n   -k :keep the temp files");
+		printf("\n   -d :individual files for different time segment");
+		printf("\n\n");
 		return -1;
 	}