Integrity check method for large video file

Abstract

The invention discloses an integrity check method for a large video file. A data file is subjected to integrity check based on a mini disk (MD) 5 algorithm. The method comprises the following steps of: extracting a target MD5 fingerprint of the large video file, comparing the target MD5 fingerprint with a source MD5 fingerprint and determining that the file integrity condition is normal if the target MD5 fingerprint and the source MD5 fingerprint are the same, and is characterized in that: the large video film target MD5 fingerprint extraction comprises the following steps of: microchannel memory mapping, intelligent data slicing, parallel extracting of MD5 fingerprints of the sliced data and MD5 fingerprint synthesizing. The integrity check method has the advantages of overcoming the defects of long consumed time and low efficiency of checking the large video file by using the conventional MD5 code, rapidly and efficiently checking whether the file has the problems such as packet dropout, tampering, virus infection and the like and ensuring the integrity and usability of the data file.

Description

technical field [0001] The invention relates to a method for verifying the integrity of a large video file. Background technique [0002] At present, the data integrity verification of video files is generally carried out using traditional MD5 codes. The biggest problem with this technical method is the bottleneck of large video file verification. For the entire large video file, it takes about 40 seconds to generate an MD5 for a 2GB file. , and a 7GB file takes about 150 seconds (dual-core 3.0GHz CPU, 2GB MEM test), if you want to verify, you need to generate MD5 again for comparison, which takes twice as long as once. For the coming high-definition era, most high-definition files are very large in size, so it can be seen that the impact of traditional MD5 verification data integrity on work efficiency is obvious. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the existing MD5 data integrity verification method,...

AI Technical Summary

Problems solved by technology

[0002] At present, the data integrity verification of video files is generally carried out using traditional MD5 codes. The biggest problem with this technical method is the bottleneck of large video file verification. For the entire large video file, it takes about 40 seconds to generate an MD5 for a 2GB file. , and a 7GB file takes about 150 seconds (dual-core 3.0GHz CPU, 2GB MEM test), if you want to verify, you need to generate MD5 again for comparison, which takes twice as long as once

For the coming high-definition era, most of the high-definition files are very large in size. It can be seen that the traditional MD5 verification data integrity has an obvious impact on work efficiency.

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