A method for playing video in a splicing screen system

Abstract

The invention discloses a method enabling a spliced screen system to play videos. The method includes the following steps that: a video file to be played is stored in a playing control terminal and all spliced screen processors; a windowing control terminal calculates the windowing position and a video picture display area of each spliced screen processor, and a windowing command is transmitted to the playing control terminal and all the spliced screen processors respectively; the playing control terminal opens and decodes the stored video file, and displays each image frame sequentially according to the timestamps of the image frames, and the playing control terminal broadcasts the timestamp of an image frame to be played to the outside before displaying each image frame; and the spliced screen processors open and decode the stored video file, and after receiving the timestamp broadcasted by the playing control terminal, the spliced screen processors search an image frame corresponding to the timestamp, and display the image frame in a playing window. With the method adopted, frame loss, distortion and non-synchronization can be avoided.

Description

technical field [0001] The invention relates to splicing screen technology, in particular to a method for playing video by a splicing screen system. Background technique [0002] figure 1 A schematic diagram of an existing splicing screen system is shown. The splicing screen system includes a splicing screen 91, several splicing screen processors 92, a windowing client 93, a windowing server 94, a playback control terminal 95a, a playback control terminal 95b, a video encoder 96 and a switch 97. The splicing screen 91 , several splicing screen processors 92 , windowing client 93 , windowing server 94 , playback control terminal 95 a and video encoder 96 are communicatively connected through the switch 97 . The playback control terminal 95 b is connected to a video encoder 96 . Aforesaid window opening client 93, window opening server 94, play control terminal 95a and play control terminal 95b all can be taken on by common computer, and, the function of window opening clie...

AI Technical Summary

Problems solved by technology

However, due to hardware limitations, the video encoder uses frame-by-frame acquisition, that is to say, the acquisition rate is 30 frames per second, which will inevitably cause frame loss.

[0010] 2. Distortion

There are two main reasons. One is that in order to effectively utilize network bandwidth, lossy compression is usually used in the process of image transmission to the splicing screen processor, which will inevitably lead to a decline in image quality; It is 2K resolution (1920x1080). For high-definition video (such as 4K high-definition video), although the video can be played in full screen, the 4K video is actually shrunk to 1 / 4 of the original display, and the screen capture method can only Capture images with a resolution of 1920x1080, and transfer them to a large screen with only a resolution of 1920x1080. A lot of details are lost, and the advantages of high-definition disappear.

[0011] 3. Poor synchronization

The main reason is that each splicing screen processor may receive images of different sizes and sequences, resulting in some fast and some slow

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