frame-rate

I have a generative art app, and I'd like it to draw as many cycles as possible each frame without reducing the framerate. Is there a way to tell how much time is left until the screen updates/refreshes? I figure if I can approximate how many milliseconds each cycle takes, then I can run cycles until the amount of time left is less than the average or the peak cycle time, then let the screen refresh, then run another set of cycles. If you want your app to run at N frames per second, then you can draw in a loop for 1/N seconds*, where N is typically the stage framerate (which you can get and

I am developing an iphone game using cocos2d and have it set to to show the FPS. Now most of the time the application will start and run at 60 fps, However apparently randomly sometimes the application will start and top at only 40 fps. This does not happen often and seems to happen only when you quit the application and restart it as soon as possible, allthough this does not trigger the effect most of the time. But after a few quick quit-restart sequences the game eventually starts and has only 40 fps instead of the normal 60. If I quit the application at this point and wait for about 3

I am making a 2D sidescroller game for Android and am thinking of using Box2D for the physics. I would like to know if when using Box2D, if the framerate of the device drops from 60 fps (Android's cap) to, for example, 30 fps will all the physics slow down with it? To elaborate, I'm going to be using real-time online multiplayer and so the framerate cannot be relied upon as a constant. So if one of the devices in the multiplayer game is running at 60 fps and another is at 30 fps and an object should be moving at 10 metres/second will it move at 5 metres/second on the slower device? I would

I'm working on a project where I have to set the fps of a video stream (as 10) from a camera and grab a frame every 5th frame. I'm working on a program that has already been half written by someone else. The thing is, they have used Matrox Framegrabber dlls. There is also Matrox Frame Grabber on the device. But I cant find any commands for framegrab in C#. I found the following code for C++. MIL_ID MdispAlloc(SystemId, DispNum, DispFormat, InitFlag, DisplayIdPtr) where MIL_ID SystemId; System identifier long DispNum; Display number char *DispFormat; Display format name or file name long

std::chrono::system_clock::time_point m_BeginFrame = std::chrono::system_clock::now(); std::chrono::system_clock::time_point m_EndFrame = std::chrono::system_clock::now(); std::chrono::nanoseconds m_WorkTime = std::chrono::nanoseconds::zero(); std::chrono::nanoseconds m_WaitTime = std::chrono::nanoseconds::zero(); auto invFpsLimit = std::chrono::nanoseconds(1e9 / fpsLimit()); // main loop while (!glfwWindowShouldClose(m_pScreen->glfwWindow())) { m_WaitTime = m_BeginFrame - m_EndFrame; m_EndFrame = std::chrono::system_clock::now(); m_WorkTime = m_EndFrame - m_BeginFrame; // if need sleep if (m

I have an app which encodes videos in different ways and saves it to Photos library - it can cut specific time range, add pictures, text, etc. Everything is working perfectly till I try to encode video 120+ fps. The problem is that video appears to be slow-motioned and I don't pursue that goal at all. Here I found out about property for AVAssetWritterInput which is called AVVideoExpectedSourceFrameRateKey , but the problem is that when I try to apply this parameter to my AVAssetWritterInput , I'm getting this error: *** Terminating app due to uncaught exception 'NSInvalidArgumentException',