Http://discussion.forum.nokia.com/forum/showthread.php? S = db67f2a788859f04447a0e9bfd9f05e9 threadid = 33852 perpage = 15 pagenumber = 2
Frame Rate Test for tile-based games
Hi, all.
Recently there were pretty much discussions on which method is faster and more efficientFor using in tile-based games.I was also interested in the issue, of course
I spent some free time and created small test that rather reallistically models typicalSituation:
It fills screen with 16x16 pixel tiles and then dr
;Cudaerror_t cudaeventrecord (cudaevent_t event, custreamStream) --- record events;Cudaerror_tCudaeventelapsedtime (float * time, cudaevent_t start, cudaevent_tEnd) --- calculate the time difference between two events;Cudaerror_tCudaeventdestroy (cudaevent_t event) --- destroys the event object.Calculate the time difference between two events (In milliseconds, the precision is0.5Microseconds). If no event is recorded, this function returns cudaerrorinvalidvalue. If any event in the record uses a
OpenCV2 Study Notes (18): displays the Frame Rate of the video stream and opencv2 Study Notes
Recently, you need to display the frame rate (FPS) in real time on the video. FPS is the abbreviation of Frame Per Second. The Chinese meaning is the number of frames Per Second. The development platform is VS2013 + OpenCV2.4.9.
FPS is used to measure the quantity of in
); } /** * Sets the quality of the EXIF thumbnail in Jpeg picture. * * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 * to 100, with 100 being the best. */ public void setJpegThumbnailQuality(int quality) { set(KEY_JPEG_THUMBNAIL_QUALITY, quality); } /** * Sets Jpeg quality of captured picture. * * @param quality the JPEG quality of captur
length of time then it is easy to calculate the size of the output file.
Frame rate: Frame rate is also called frame frequency, frame rate is the number of frames per second in the video file, the naked eye want to see a continuous moving image needs at least 15 frames.Bitrate: Bit rate (also called code rate, data rate) is a parameter that determines the overall video/audio quality, the number of bytes processed in seconds, the bitrate is proportional to the video quality, and the bit rate in
() method.
Animation
It is actually very easy to make the image move from one place to another, that is, to clear the image where it was originally located and then load the image in another place, it looks like the image is moving. In computer opinion, it is actually a group of pixels moving. Is an example
The following is a sample code.
import pygame, sysfrom pygame.locals import *pygame.init()FPS = 30 # frames per second settingfpsClock = pygame
reduce the buffer capacity and improve the real-time performance of audio and video;
When the network condition is poor, AnyChat will increase the buffer capacity, which will increase latency. However, it can ensure the smoothness of audio and video and effectively eliminate the impact of network jitter on the Quality of audio and video playback;
According to the actual network test,AnyChatAudio/video latency indicators are as follows:
When the network status is good, no packet loss occurs, and
Fault symptom:Games are the driving force behind hardware development. After the game's main board and game peripherals, display manufacturers have recently begun to attack the game field again, a series of game displays available. These game displays share a Hz update rate. Compared with traditional 60Hz displays, a higher update rate provides a smoother picture of the game.Solution:Two steps to start a great game JourneyAfter getting the Hz game display, do not rush into the game. You must
How to use:
Write the following code to the first frame of the FLA; write delay () in any frame; the command can achieve a 3 second delay effect;
Ideas:
1. Use FPS and onenterframe to complete.
2.Flash animation default 1 seconds to play 12 frames, that is, FPS is 12.
3. Perform a onenterframe (enter frame), counter++ add 1, then how many times a second? 1 seconds to enter 12 frames, so since the a
still time to spare, that is, Cpu/gpu fps (frame rate, Frames Per Second) is higher than display FPS. That's true. Since CPU/GPU only begins processing when the VSync is received, their FPS is pulled down to the same FPS as display. However, this processing is not a problem, because the Android device display
into the above two-section runway (code execution, Image Rendering), that is, what we callFrame. User code and invalidation operations are filled in the Code Execution area, and rendering operations are filled in the runway rendering area. It must be noted that related operations can only happen within the scheduled time of Marshal. If your userThe code is very short, so marshal will wait for a while after executing the user code and then enter the rendering stage.
In order to better illustrate
. This article discusses the indicators that affect the SDK performance and establishes the corresponding performance model.
Important parameters that affect video quality and size
Before testing, we need to specify several parameters that have the greatest impact on the video quality and size: frame rate, bit rate, and resolution.
1) how to set Frame Rate
A frame is a static image, and continuous frames form an animation, such as a TV image. We usually say the number of frames. Simply put, th
problems. If the refresh frequency is 60Hz, it takes a long time to draw a picture in a simple scenario. The frame speed can be constant at 60 FPS (that is, 60 frames/second ). If the scenario becomes complex and the time for drawing a picture exceeds 1/60 seconds, the frame speed will decrease sharply.If the time for drawing a picture is 1/50, the display needs to be refreshed in the first 1/60 seconds. However, since the new picture is not properly
must "blit" them (copying their meaning) onto the display object via the Blit () method. Animation It's really simple to move an image from one place to another, to erase the image from where it was originally, and then load the image in another place so that it looks like it's moving. In the computer's view, it is actually a group of pixels moving. is an example Here is a sample code Import Pygame, Sysfrom pygame.locals import *pygame.init () FPS
the D300S will soon be placed in its position, return to the price of yuan, and open the price space with their own full-frame overlord D700 and Canon 7D. There is no doubt that at the price of 10000 yuan, the D300S will still be the most powerful performance and the most professional SLR design.Nikon D300s parameters1, body characteristics: APS-C specifications digital SLR2. Valid pixels: 12.3 million3. Display scale: About 3 inch pixels4. HD camera
"Can I play on the Linux platform?" "This kind of question is bothering gamers, so the answer is" go to the Linux platform now! ”。 Open source organizations have been consistently developing different types of games for the Linux operating system, and games under Linux are no less than a few other platforms.What if, when you consider migrating from the Windows platform to the Linux platform, "Can I play on the Linux platform?" "This kind of question is bothering you, so there's an answer to that
offset means that the corresponding stream is delayed by the offset second. The format of [-]hh:mm:ss[.xxx] also supports
b) Video Options
-B bitrate Set bit rate, default 200kb/s
-R fps Set frame frequency default 25
-S size sets the frame size format to WxH default 160x128. The following abbreviations can also be used directly:SQCIF 128x96 qcif 176X144 CIF 252x288 4CIF 704x576
-aspect aspect Set horizontal longitudinal ratio 4:3 16:9 or 1.3333 1.77
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