Distributed cross-node video synchronization method and system

Abstract

The invention relates to the technical field of video synchronization. The invention relates to a video synchronization method and system, in particular to a distributed cross-node video synchronization method and system. The method comprises the following steps: when a video signal needs to be subjected to cross-screen window display, according to an image cutting area of a node corresponding toa cross-screen window and a display window area of the node corresponding to the cross-screen window, carrying out cutting and scaling processing on decoded frame data corresponding to the cross-screen window to obtain cut and scaled frame data; superposing the plurality of cut and scaled frame data according to superposing reference time to obtain frame data of the cross-screen window; setting the timestamp of the frame data of the cross-screen window after superposition processing as superposition reference time, and caching the superposition reference time into a display queue for display;According to the display sending reference time, adopting a single thread to carry out display sending processing on the frame data in the display queue. According to the distributed cross-node videosynchronization method and system, the cross-node video synchronization effect can be obviously improved.

Description

technical field [0001] The present invention relates to the technical field of video synchronization, and more specifically, to a distributed cross-node video synchronization method and system. Background technique [0002] The distributed system uses the streaming media server to distribute the video compressed code stream to the distributed decoding nodes through the network, and each decoding node decodes the code stream and outputs it to the display device for display, and then stitches the images output by each decoding and splicing node into one Large picture window. The video code stream needs to be pre-processed such as network transmission, decoding, noise reduction, scaling, cropping, sharpening, and superimposition, and then sent to the video memory of the output module, and the output is controlled by the output module. However, in the existing distributed system, the time spent on network transmission of the same video frame data sent to different nodes and the...

AI Technical Summary

Problems solved by technology

However, in the existing distributed system, the time spent on network transmission of the same video frame data sent to different nodes and the load of different nodes may be different, so that different nodes send the same video frame to the video memory at different time points. This causes the display device to output and display the same video frame at different times, and the corresponding video is not synchronized.

[0003] The concept of distributed processor is decentralization, and any nodes are independent of each other. When the same video signal spans multiple nodes, if the video signal of each node is simply displayed, it will cause the images displayed by each node to be out of sync. , the screen is severely torn, which seriously affects the viewing experience. In order to solve the problem of out-of-sync video signals across nodes and ensure user experience, it is necessary to synchronize the video after crossing nodes to ensure that each frame of the video signal is displayed on multiple nodes. is displayed synchronously

Images