Fixed saving video file

src/demo.c

@@ -233,7 +233,7 @@ void demo(char *cfgfile, char *weightfile, float thresh, int cam_index, const ch
             }
 
 			// if you run it with param -http_port 8090  then open URL in your web-browser: http://localhost:8090
-			if (http_stream_port > 0) {
+			if (http_stream_port > 0 && show_img) {
 				//int port = 8090;
 				int port = http_stream_port;
 				int timeout = 200;
@@ -242,10 +242,11 @@ void demo(char *cfgfile, char *weightfile, float thresh, int cam_index, const ch
 			}
 
 			// save video file
-			if (output_video_writer) {
+			if (output_video_writer && show_img) {
 				cvWriteFrame(output_video_writer, show_img);
 				printf("\n cvWriteFrame \n");
 			}
+
 			cvReleaseImage(&show_img);
 
             pthread_join(fetch_thread, 0);

src/image.c

@@ -318,11 +318,12 @@ IplImage* draw_train_chart(float max_img_loss, int max_batches, int number_of_li
 	IplImage* img = cvCreateImage(cvSize(img_size, img_size), 8, 3);
 	cvSet(img, CV_RGB(255, 255, 255), 0);
 	CvPoint pt1, pt2, pt_text;
-	pt1.x = img_offset; pt2.x = img_size, pt_text.x = 10;
 	CvFont font;
 	cvInitFont(&font, CV_FONT_HERSHEY_COMPLEX_SMALL, 0.7, 0.7, 0, 1, CV_AA);
 	char char_buff[100];
 	int i;
+	// vertical lines
+	pt1.x = img_offset; pt2.x = img_size, pt_text.x = 10;
 	for (i = 1; i <= number_of_lines; ++i) {
 		pt1.y = pt2.y = (float)i * draw_size / number_of_lines;
 		cvLine(img, pt1, pt2, CV_RGB(224, 224, 224), 1, 8, 0);
@@ -333,6 +334,7 @@ IplImage* draw_train_chart(float max_img_loss, int max_batches, int number_of_li
 			cvLine(img, pt1, pt2, CV_RGB(128, 128, 128), 1, 8, 0);
 		}
 	}
+	// horizontal lines
 	pt1.y = draw_size; pt2.y = 0, pt_text.y = draw_size + 15;
 	for (i = 0; i <= number_of_lines; ++i) {
 		pt1.x = pt2.x = img_offset + (float)i * draw_size / number_of_lines;