Browser Video Region Zoom via Transparent Overlay Capture
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Solution Overview
Problem
Existing video processing methods require plug-ins like NPAPI or ActiveX to enlarge and display partial regions of a video image, limiting their applicability to only Internet Explorer browsers, while other browsers like Firefox, Chrome, and Safari are unable to implement this functionality.
Innovation Solution
A method and apparatus that superimpose a transparent canvas image layer on a video playback window, allowing users to draw a specified region for enlargement and display without requiring any plug-ins, capturing and clipping images from the video playback window, and enlarging and displaying the clipped image on the transparent layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If video data is directly transmitted from camera to server without preprocessing, then network bandwidth is saved, but terminal devices cannot perform intelligent processing due to lack of local capability
Solution Approach 1:
The video processing system is segmented into multiple components: terminal device performs initial processing (face detection, landmark recognition, attribute analysis), intermediate server performs secondary processing (beauty effect generation, filter application), and main server performs final processing (video compilation, publishing). This segmentation allows each device to perform appropriate functions based on its capabilities, enabling intelligent processing at terminals while maintaining system efficiency.
2Productivity
If video data is compressed and processed at terminal devices, then intelligent processing capability is improved, but network bandwidth consumption increases due to transmission of processed data
Solution Approach 1:
The terminal device performs preliminary processing actions before video transmission, including face detection, landmark recognition, and attribute analysis. This preliminary action enables the terminal to identify and extract key features, allowing the server to receive only essential data rather than complete raw video streams, thereby reducing overall network bandwidth consumption while maintaining processing efficiency.
3Ease of operation
If multiple video effects and filters are applied in real-time, then user experience is improved, but processing time and computational resources increase
Solution Approach 1:
The video processing system applies effects and filters in periodic stages rather than continuously. The terminal device performs initial processing in one period, transmits processed data, then the server performs secondary processing in subsequent periods. This periodic action allows complex effects to be applied systematically, improving user experience while managing processing time through staged execution rather than simultaneous real-time processing of all effects.
Data Source
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AI summary
The present disclosure discloses a method and an apparatus for processing a video, a terminal and a storage medium, which belongs to the field of video processing technologies. The method includes: superimposing a transparent image layer on a video playback window; acquiring a first image by capturing images from a video played in the video playback window in response to acquiring a specified region to be enlarged and displayed in the video playback window; acquiring a second image by clipping the first image based on the specified region, wherein the second image comprises the specified region; and enlarging and displaying the second image on the transparent image layer. The present disclosure does not need to call any plug-in and is applicable to any browser, thereby improving the applicability.