diff --git a/src/optflow/optflow-demo.cpp b/src/optflow/optflow-demo.cpp
index ca305c866..cb0ef73af 100644
--- a/src/optflow/optflow-demo.cpp
+++ b/src/optflow/optflow-demo.cpp
@@ -3,10 +3,11 @@
 constexpr unsigned long WIDTH = 1920;
 constexpr unsigned long HEIGHT = 1080;
 constexpr float SCALE_FACTOR = 0.5f;
-constexpr bool OFFSCREEN = false;
+constexpr bool OFFSCREEN = true;
 constexpr int VA_HW_DEVICE_INDEX = 0;
 constexpr float SCENE_CHANGE_THRESH = 0.29f;
 constexpr float SCENE_CHANGE_THRESH_DIFF = 0.1f;
+constexpr float MAX_POINTS = 500000.0;
 
 #include "../common/subsystems.hpp"
 #include <vector>
@@ -69,7 +70,7 @@ void visualize_sparse_optical_flow(const cv::UMat& prevGrey, const cv::UMat &nex
         float area = cv::contourArea(hull);
         float density = (detectedPoints.size() / area);
         float stroke = 30.0 * sqrt(area / (nextGrey.cols * nextGrey.rows * 4));
-        size_t currentMaxPoints = density * 500000.0;
+        size_t currentMaxPoints = density * MAX_POINTS;
 
         size_t copyn = std::min(detectedPoints.size(), (size_t(std::ceil(currentMaxPoints)) - prevPoints.size()));
         if (prevPoints.size() < currentMaxPoints) {
@@ -159,7 +160,7 @@ int main(int argc, char **argv) {
             break;
 
         cv::resize(videoFrame, resized, frameBufferSize);
-        cv::resize(resized, down, cv::Size(0, 0), SCALE_FACTOR, SCALE_FACTOR);
+        cv::resize(videoFrame, down, cv::Size(WIDTH * SCALE_FACTOR, HEIGHT * SCALE_FACTOR));
         cv::cvtColor(resized, background, cv::COLOR_RGB2BGRA);
         cv::cvtColor(down, downNextGrey, cv::COLOR_RGB2GRAY);
 
diff --git a/src/tetra/tetra-demo.cpp b/src/tetra/tetra-demo.cpp
index 2002fc7d4..994900852 100644
--- a/src/tetra/tetra-demo.cpp
+++ b/src/tetra/tetra-demo.cpp
@@ -12,7 +12,7 @@ constexpr const int VA_HW_DEVICE_INDEX = 0;
 using std::cerr;
 using std::endl;
 
-void init_tetrahedron() {
+void init_scene() {
     glViewport(0, 0, WIDTH, HEIGHT);
     glColor3f(1.0, 1.0, 1.0);
 
@@ -30,7 +30,7 @@ void init_tetrahedron() {
     glRotatef(70, 0, 1, 0);
 }
 
-void render_tetrahedron() {
+void render() {
     glViewport(0, 0, WIDTH , HEIGHT );
     glRotatef(1, 0, 1, 0);
     glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
@@ -103,14 +103,14 @@ int main(int argc, char **argv) {
     cv::UMat frameBuffer;
     cv::UMat videoFrame;
 
-    init_tetrahedron();
+    init_scene();
 
     while (true) {
         //Activate the OpenCL context for OpenGL
         gl::bind();
         //Render using OpenGL
         gl::begin();
-        render_tetrahedron();
+        render();
         gl::end();
 
         //Aquire the frame buffer for use by OpenCL
diff --git a/src/video/video-demo.cpp b/src/video/video-demo.cpp
index c41ca3778..c67627a3b 100644
--- a/src/video/video-demo.cpp
+++ b/src/video/video-demo.cpp
@@ -15,7 +15,7 @@ using std::cerr;
 using std::endl;
 using std::string;
 
-void init_tetrahedron() {
+void init_scene() {
     glViewport(0, 0, WIDTH, HEIGHT);
     glColor3f(1.0, 1.0, 1.0);
 
@@ -33,7 +33,7 @@ void init_tetrahedron() {
     glRotatef(70, 0, 1, 0);
 }
 
-void render_tetrahedron() {
+void render() {
     //Render a tetrahedron using immediate mode because the code is more concise for a demo
     glViewport(0, 0, WIDTH, HEIGHT);
     glRotatef(1, 0, 1, 0);
@@ -125,7 +125,7 @@ int main(int argc, char **argv) {
     cv::UMat videoFrame;
     cv::UMat videoFrameRGBA;
 
-    init_tetrahedron();
+    init_scene();
 
     //Activate the OpenCL context for VAAPI
     va::bind();
@@ -154,7 +154,7 @@ int main(int argc, char **argv) {
 
         //Render using OpenGL
         gl::begin();
-        render_tetrahedron();
+        render();
         gl::end();
 
         //Aquire the frame buffer for use by OpenCL