Method for producing video added watermarks for Android equipment

A video and watermarking technology, applied in the field of information security, can solve the problem that the recording function of Android smart devices does not realize the addition of time stamp and custom watermark

Inactive Publication Date: 2017-05-17
MWH TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of device is easy to carry, easy to use and has fewer restrictions on use, but the video recording function of Android smart devices does not implement the addition of time stamps or other custom watermarks
This makes it impossible to directly use Android smart devices for video recording in the above application scenarios

Method used

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  • Method for producing video added watermarks for Android equipment
  • Method for producing video added watermarks for Android equipment
  • Method for producing video added watermarks for Android equipment

Examples

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Embodiment Construction

[0074] In order to make the object, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.

[0075] like figure 1 As shown, a method for adding a watermark to a video produced by an Android device comprises the following steps:

[0076] S1: Video coding analysis of Android device source video stream;

[0077] The raw video data generated by the camera is usually in YUV format. However, the data generated by the Android camera is different from other devices. Usually, when calling the Android camera, it is necessary to select the video parameters in the NV21 format. This parameter indicates that the video frame is described using the YUV color space. Here it is necessary to analyze the special YUV structure of the Android original sound video frame, and the detailed steps are as follows:

[0078] S11: Obtain the original video frame, add a preview callback to the camera of the...

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PUM

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Abstract

The invention discloses a method for producing video added watermarks for Android equipment. The method includes the following steps of S1, performing video encoding analysis on original video streams of the Android equipment; S2, converting universal RBG color space encoding into a YUV (luma and chroma) format of original video stream encoding; S3, performing local time calibration; S4, performing real-time adding of user-defined watermarks; S5, performing real-time adding of timestamp; S6, performing video calibration. The method has the advantages of less use restrictions, most of the Android platform equipment with cameras is supported, any user-defined watermark images without exceeding the video size can be added in real time in recording, video adding can be performed by the aid of a CPU (central processing unit) and a GPU (graphic processing unit of intelligent equipment, dependence on special video coder chips in traditional recording equipment is avoided, time of current time zone is acquired accurately under networking and timestamp watermarks can be accurately added, calibration is performed for the videos, and situations that data is tampered and error occurs in transmission are prevented.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a method for adding a watermark to a video generated by an Android device. Background technique [0002] In some application scenarios such as forensics or surveillance that require video recording and archiving, professional video recording or monitoring equipment is usually required. The cost of these devices is relatively high, and the use and maintenance costs are also relatively high. Professional recording equipment can achieve high-definition video recording, but it is usually bulky and difficult to carry around. At the same time, in some application scenarios, it may be necessary to add a time watermark or a custom image watermark to the video in real time. The former addition function is usually implemented in some professional equipment, but the latter is generally added through post-production. This makes the real-time performance of the added watermark...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/913
CPCH04N5/913H04N2005/91335
Inventor 黄旭杨博
Owner MWH TECH LLC
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