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Real-time screen fusion method for live broadcast video and presentation file

A live video and real-time picture technology, applied in image communication, selective content distribution, electrical components, etc., can solve the problem that the live video and presentation real-time picture fusion scheme cannot meet the actual business needs, etc., to reduce the number of dynamic pictures, The effect of high scalability and great freedom of operation

Inactive Publication Date: 2016-07-06
上海卓越睿新数码科技股份有限公司
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a live video and presentation real-time picture fusion method to solve the problem that the existing live video and presentation real-time picture fusion scheme cannot meet the actual business needs

Method used

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  • Real-time screen fusion method for live broadcast video and presentation file

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Embodiment Construction

[0024] The overall idea of ​​the present invention is to simultaneously integrate the live video window and the online document presentation window on one screen, and the two windows are fused and displayed by overlapping them up and down in real time. The way is integrated in any position of the bottom window, so that the bottom window can be fully displayed, and the content of the upper window can be highlighted, and the integrated screen display effect is truly realized. The lecturer can dynamically modify the focus window in real time by clicking the "Switch Focus Window" button.

[0025] The specific principle of its realization is as follows: the live broadcast display page is composed of two windows displaying different contents, that is, the video window and the document presentation window. Among them, the video window is used to display the video content. The video content can be collected by the video capture device on the teacher’s side, and then sent to the back-e...

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Abstract

The invention discloses a real-time screen fusion method for a live broadcast video and a presentation file. The method comprises the following steps: creating an HTML5 page; adding a live broadcast video display window on the page; adding a file presentation window on the page; adding a Canvas area on the page; adding a JavaScript monitor to monitor loading states of resources of the live broadcast video display window and the file presentation window; adding a JavaScript timer, and respectively capturing screen images of the live broadcast video display window and the file presentation window at a preset time interval; processing the captured screen images of the live broadcast video display window and the file presentation window by a context object of Canvas one by one; and drawing a video screen on a Canvas layer by a drawImage method of the Canvas, wherein the video screen comprises contents in the live broadcast video display window and the file presentation window.

Description

【Technical field】 [0001] The invention belongs to the field of Internet information processing, in particular to a method for fusing live video and presentations in real time. 【Background technique】 [0002] Massive Online Open Course (MOOC, referred to as MOOC) has shown a momentum of vigorous development since 2013. In China, MOOC is defined as an important supplement to traditional classroom teaching. Whether it is the university or the public's interest in MOOC The demand is very strong. Among the MOOC platforms, the flipped classroom based on live broadcast and large-scale real-time teaching in multiple places have become important features that distinguish Chinese MOOC platforms from other international MOOC platforms. In the teaching mode using live video, teachers interact with students in real time through audio and video, and demonstrate to students through online manuscripts. Therefore, the three functions of real-time audio and video, synchronous manuscript pres...

Claims

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Application Information

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IPC IPC(8): H04N21/431
CPCH04N21/4312H04N21/4316
Inventor 巫川
Owner 上海卓越睿新数码科技股份有限公司
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