frame-rate

问题 I was writing a new code base in opengl and have encountered a weird bug very early on. It is a distinct fluctuation in framerate that is repetitive and predictable. I know that it is definitely proportional to objects rendered. It is also proportional to screen size (not viewport size, not window size, just physical device size) It is roughly a ratio of 0.2:1 (low:high) frames I got curious and graphed it, bear in mind that the window/context isn't vsynced or capped. The view is completely

问题 I was writing a new code base in opengl and have encountered a weird bug very early on. It is a distinct fluctuation in framerate that is repetitive and predictable. I know that it is definitely proportional to objects rendered. It is also proportional to screen size (not viewport size, not window size, just physical device size) It is roughly a ratio of 0.2:1 (low:high) frames I got curious and graphed it, bear in mind that the window/context isn't vsynced or capped. The view is completely

问题 I have a counter working that counts every frame. what I want to do is divide this by time to determine the FPS of my program. But I'm not sure how to perform operations on timing functions within python. I've tried initializing time as fps_time = time.time fps_time = float(time.time) fps_time = np.float(time.time) fps_time = time() Then for calculating the fps, FPS = (counter / fps_time) FPS = float(counter / fps_time) FPS = float(counter (fps_time)) But errors I'm getting are object is not

问题 I am working on ubuntu 16.04 and using a USB 2.0 webcam. I want to decrease the frame rate somehow since the project I'm working on requires face detection which really lags the video hence want to decrease the frame rate. I've tried implementing the following code import cv2 cap = cv2.VideoCapture(0) cap.set(cv2.CAP_PROP_FPS, 15) fps = int(cap.get(5)) print("fps:", fps) while(cap.isOpened()): ret,frame = cap.read() if not ret: break cv2.imshow('frame', frame) k = cv2.waitKey(1) if k == 27:

问题 This question already has an answer here : Framerate affect the speed of the game (1 answer) Closed last month . I am having a hard time figuring the physics of speed in this snake game I made using pygame. The issue is that as soon as I set the fps to be above 15, the snake's speed increases as well. I know that this has to do with milliseconds etc which I found to work, high fps with slow speed. However at that point, I could not get the X and Y to be correct so that I can eat the apple. I

问题 Every pygame has a game loop that looks like this: while running: for event in pygame.event.get(): if event.type == pygame.QUIT: running = False pygame.display.flip() print("tick " + str(pygame.time.get_ticks())) clock.tick(1) According to the api for get_ticks() : Returns the number of millisconds since pygame.init() was called. Before pygame is initialized this will always be 0. But clock.tick() : This method should be called once per frame. It will compute how many . milliseconds have

问题 I wrote a little c++/qt application, that draws a self made cursor on the actual cursor position. To minimize the latency respectively the offset of the actual cursor position and the drawn one, my QWidget updates itself as fast as possible. Part of the constructor: QTimer *Timer = new QTimer(this); connect(Timer, SIGNAL(timeout()), this, SLOT(update())); Timer->start(); paintevent: void Widget::paintEvent(QPaintEvent* event) { auto t1 = std::chrono::high_resolution_clock::now(); std::cerr <<

问题 I'm currently making a game using PyGame (Python 3), and I'm looking for a way to make the game run at a fixed FPS. Most of the game is located inside a giant while loop, where the user input is taken, sprites are rendered, etc. every tick. My goal is to be able to set a fixed FPS that will make the game run at the same speed on a fast or slow computer. I can, of course, use the clock module in pygame: clock = pygame.time.Clock() and then call this every loop: clock.tick(30) but that will

问题 I'm trying to display my frames-per-second in my cube-rendering program. I would like to see its performance. So, how can I do it? I have done research on this already, but the examples I've seen use either multiple classes and still don't work, or they use libraries that I don't have. Is there a way to get the FPS by using pre-installed libs like ctime? I am using OpenGL with C++. Here is my (empty) function: void GetFPS() { } and then I display my FPS in my render function with: std::cout <

问题 Question about framerates on the picamera v2: According to the documentation of picamera , the following framerates are feasible for this hardware: Resolution Aspect Ratio Framerates Video Image FoV Binning 1 1920x1080 16:9 0.1-30fps x Partial None 2 3280x2464 4:3 0.1-15fps x x Full None 3 3280x2464 4:3 0.1-15fps x x Full None 4 1640x1232 4:3 0.1-40fps x Full 2x2 5 1640x922 16:9 0.1-40fps x Full 2x2 6 1280x720 16:9 40-90fps x Partial 2x2 7 640x480 4:3 40-90fps x Partial 2x2 However, when