Method for synchronously playing multi-computer video based on refresh rate of display card
A technology of video playback and playback method, applied in the direction of cathode ray tube indicators, instruments, static indicators, etc., can solve the problems of increasing cost and computer burden, achieve stable playback frame rate, reduce network interference, and optimal synchronization effect of effect
Active Publication Date: 2010-09-15
GLODON CO LTD
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[0007] There are two defects in this method: one is to install precise timers for all machines, which requires additional professional hardware, which increases costs, and additional hardware will also cause additional burdens on the computer, such as the power of the power supply. Wait
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[0032] This embodiment specifically describes a multi-machine video synchronous playback method based on the graphics card refresh rate provided by the technical solution of the present invention. The method uses a video playback system to complete the multi-machine video synchronous playback. The video playback system includes: a main control The computer is used to divide the video and control the playback process of the video; the node computer is used to receive the instruction of the master computer to play the video; to drive and adjust the control display;
[0033] figure 1 It is the main flow chart of the technical solution of this embodiment. Such as figure 1 As shown, the multi-machine video synchronous playback method proposed in this embodiment includes the following steps:
[0034] (1) Graphics card pre-setting steps: the main controller and the node machine set the refresh frequency of the graphics card according to the frame rate designed according to the pla...
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The invention relates to a method for synchronously playing a multi-computer video based on the refresh rate of a display card and belongs to the technical field of digital multimedia players. For improving the stability of a frame rate and synchronization effect in the process of playing the multi-computer video, the method provided by the invention comprises a step of presetting the display card and a step of synchronous playing of a node computer and control of the frame rate, wherein in the step of presetting the display card, a main control computer and the node computer set a refresh frequency of the display card according to the frame rate required by playing and simultaneously start a vertical synchronization function of the display card; and in the step of synchronous playing of the node computer and control of the frame rate, the node computer extracts video data from a video source data buffer and carries out multi-computer synchronous playing and frame rate control according to the preset refresh frequency of the display card. Through the technical scheme of the invention, multi-computer synchronization problem caused by abnormal network communication and abnormal network response is greatly reduced without increasing any hardware cost; multi-computer synchronization and the frame rate are controlled by using the refresh rate of the display card; and the stable playing frame rate and the optimal synchronization effect are realized.
Description
technical field [0001] The invention belongs to the technical field of digital multimedia playback, and in particular relates to a multi-machine video synchronous playback method based on the refresh rate of a graphics card. Background technique [0002] As the digital cinema playback system has higher and higher requirements for definition, the resolution of the output picture has far exceeded the output resolution of a computer or a display device, so it is often necessary to splice multiple devices together to create a super high How to ensure the synchronization of the images output by all devices has become a key issue. [0003] There are two main traditional methods: [0004] 1. Coordinate through the network or other communication methods to ensure that all machines draw the same frame at the same time. The specific method is: there is a machine called the master in the system, which notifies all other machines to generate a certain frame of picture through the netw...
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IPC IPC(8): G09G5/14G09G5/393
Inventor 朱旭平吴昊迟伟
Owner GLODON CO LTD