frame-rate

How do I render a video from a list of time-stamped images?

柔情痞子 提交于 2019-12-04 00:04:17
问题 I have a directory full of images following the pattern <timestamp>.png , where <timestamp> represents milliseconds elapsed since the first image. input.txt contains a list of the interesting images: file '0.png' file '97.png' file '178.png' file '242.png' file '296.png' file '363.png' ... I am using ffmpeg to concatenate these images into a video: ffmpeg -r 15 -f concat -i input.txt output.webm How do I tell ffmpeg to place each frame at its actual position in time instead of using a

How to create a FPS game? [closed]

怎甘沉沦 提交于 2019-12-03 17:07:40
As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . I would like to know How to create a fps-game with SDL lib? Are there any books that explain with examples? this wins for most open ended question. You could literally write a book. But lets settle for pointing in the right direction...

How do I cap my framerate at 60 fps in Java?

眉间皱痕 提交于 2019-12-03 16:15:50
问题 I am writting a simple game, and I want to cap my framerate at 60 fps without making the loop eat my cpu. How would I do this? 回答1: You can read the Game Loop Article. It's very important that you first understand the different methodologies for the game loop before trying to implement anything. 回答2: I took the Game Loop Article that @cherouvim posted, and I took the "Best" strategy and attempted to rewrite it for a java Runnable, seems to be working for me double interpolation = 0; final int

spritekit ios9 fps drop

半城伤御伤魂 提交于 2019-12-03 14:20:54
I've noticed a major drop in fps in my sprite kit game having upgraded from iOS 8.4 to iOS 9. Has anyone else encountered this? My texture atlases are still buried away in .atlas files. I've tried to use the asset catalog texture atlas functionality as an experiment and that gives even worse performance. Have you tried this? skView.ignoresSiblingOrder = YES; You will probably have to set some zValues explicitly after the change, but the number of draw calls will hopefully be reduced. You can BTW display the number of draw calls by this line: skView.showsDrawCount = YES; https://developer.apple

How to understand devtools timeline properly?

Deadly 提交于 2019-12-03 14:06:47
My question is about Chrome DevTools, specifically I have question about Timeline tab. So as I've read numerous times, my browser has to have 60fps speed rendering my pixels. Sometimes though it has some heavy JS executing and preventing 60fps happening. Also if I have some CSS and JS which cause recalculating and repainting of the DOM tree(part or full tree) it may also take more than ~16ms for one frame. Here is the picture of such a long frame from our app: Ok, here I can clearly see, that two requests take so much time(192ms + 14ms), that browser can't paint 60fps and it doesn't get even

OpenCV Python Video playback - How to set the right delay for cv2.waitKey()

浪尽此生 提交于 2019-12-03 13:50:51
问题 I used the following code to capture a video file, flip it and save it. #To save a Video File import numpy as np import cv2 cap = cv2.VideoCapture(0) # Define the codec and create VideoWriter object fourcc = cv2.cv.CV_FOURCC(*'XVID') out = cv2.VideoWriter('output.avi',fourcc, 20.0, (640,480)) while(cap.isOpened()): ret, frame = cap.read() if ret==True: frame = cv2.flip(frame,0) # write the flipped frame out.write(frame) cv2.imshow('frame',frame) if cv2.waitKey(1) & 0xFF == ord('q'): break

Access high fps camera on Android

纵饮孤独 提交于 2019-12-03 11:58:21
There are phones with official support for high fps recording, like the Galaxy S5 and S6. I tried both, with both you can record high fps videos (60 or even 120 fps) with the default camera app. (Or on the S6 using Gear VR's "Passthrough Camera" function.) BUT: when you query the camera's capabilities through the standard Android APIs (tried it on both S5 on 4.4 and 5.0 and S6 on 5.1, tried both the old and the new camera2 APIs) in all cases, 30 fps is reported as the highest available. Does this mean that these phones use private proprietary APIs to access high fps capabilities and there's no

iOS AVCaptureSession - How to get/set the number of frames per second recorded?

╄→гoц情女王★ 提交于 2019-12-03 11:50:50
问题 I'm new to AVCaptureSession and wish to better understand how to work with it. So I managed capturing the video stream as separated CIImages and convert them to UIImages. Now I wish to be able to get the number of Frames Per Second captured and preferably to be able to set it. Any idea how to do that? 回答1: You could use AVCaptureConnection 's videoMinFrameDuration accessor to set the value. See the AVCaptureConnection documentation Consider output be AVCaptureVideoDataOutput object.

Is it possible to disable frame-limiting in libGDX?

£可爱£侵袭症+ 提交于 2019-12-03 10:28:01
More specifically, a desktop libGDX-LWJGL application. There are configurations options to disable CPU syncing as well as vsynching, but regardless the application runs at 60fps. This is fine for all practical uses - but out of curiousity if nothing else, I'd like to see how high the framerate could go. Aaron Mahan Rode Hyde 's answer is no longer correct due to changes in the library. Try this: LwjglApplicationConfiguration config = new LwjglApplicationConfiguration(); config.vSyncEnabled = false; // Setting to false disables vertical sync config.foregroundFPS = 0; // Setting to 0 disables

Show FPS in QML

时间秒杀一切 提交于 2019-12-03 09:47:28
问题 Is there a "simple" way to show the FPS (frame rate) in a QML/c++ application. All animations and views are done in QML and the application logic is in c++. I already tried setting QML_SHOW_FRAMERATE in Linux before starting the application but it didn't help: export QML_SHOW_FRAMERATE=1 回答1: You have to create your own FPS QQuickItem (or QQuickPaintedItem) and register in your main.cpp to be available in your QML code. Here an example. class FPSText: public QQuickPaintedItem { Q_OBJECT Q