CN105611319A - Video content anti-tampering method - Google Patents
Video content anti-tampering method Download PDFInfo
- Publication number
- CN105611319A CN105611319A CN201510976192.4A CN201510976192A CN105611319A CN 105611319 A CN105611319 A CN 105611319A CN 201510976192 A CN201510976192 A CN 201510976192A CN 105611319 A CN105611319 A CN 105611319A
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- file
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- video content
- tampering
- video
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 description 4
- 238000012795 verification Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
- H04N21/23895—Multiplex stream processing, e.g. multiplex stream encrypting involving multiplex stream encryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/23614—Multiplexing of additional data and video streams
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
- H04N21/43853—Multiplex stream processing, e.g. multiplex stream decrypting involving multiplex stream decryption
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
The invention discloses a video content anti-tampering method. A structure is customized and is inserted in a TS (Transport Stream) or MP4 file; the customized structure comprises the version number of a hash algorithm, a mode, a file length and a hash value; in adoption of the video content anti-tampering method, massive stock contents can be upgraded conveniently and rapidly; anti-tampering information is inserted; after adding the anti-tampering information, once the video data is tampered by a hacker, a play end can verify so as to discover timely and prevent the tampered video from being played; with respect to the newly generated video contents, the anti-tampering data can be added easily through the method in the production process; with respect to online services, especially wired or OTT services based on TS streams, the anti-tampering information can be added in real time; whether the anti-tampering information is built can be detected in real time in a set top box player; and therefore, the hacker is prevented from destroying andtampering the video data.
Description
Technical field
The present invention relates to a kind of method for processing video frequency, particularly a kind of anti-tamper method of video content.
Background technology
TS (TransportStream:ISO/IEC13818-1) and MP4 (ISO/IEC14496-12) file format are two kinds of maximum video file formats of most widely used, storage at present. When content supplier suffers assault, file content (comprises off-line storage file, live distribution of document) while being maliciously tampered, relating to Huang and relate to cruelly or with reaction speech if distort content, find not in time and process and will cause serious severe social influence.
For preventing the generation of this type of accident, common way is to be each document creation MD5 check code at present, but in actual applications, all needs to create and checking MD5 value at every turn, and efficiency is too low, and this method cannot be implemented in real-time live broadcast.
Summary of the invention
Based on this, be necessary to provide one Modify rapidly in large quantity, and can fast detecting content whether be tampered, can not affect the video content tamper resistant method of normal play.
According to an aspect of the present invention, provide a kind of video content anti-tamper method, self-defined a kind of structure, is inserted in TS or MP4 file, and self-defining structure comprises version number, pattern, file size and the hash value of hash algorithm.
Therein in an embodiment, self-defining structure is inserted in the pmt table of TS file, as follows for the customizing method of the structure of TS file:
A1, in TS file, search for two continuous pmt tables, the data between two pmt tables are obtained to a hash value with hash algorithm;
B1, a self-defined descriptor, content comprises descriptortag, version number, pattern, file size, and the hash value of step a1 gained;
C1, search for first pmt table in insert self-defining descriptor.
In an embodiment, start to search for two continuous pmt tables from the head of TS file therein.
Therein in an embodiment, search for first descriptor () of first pmt table in insert self-defining descriptor.
Therein in an embodiment, self-defining structure is inserted in MP4 file, and self-defining structure is a box, as follows for the customizing method of the structure of MP4 file:
A2, all key frames of MP4 file are obtained to a hash value with hash algorithm;
B2, a self-defined box, content comprises descriptortag, version number, pattern, file size, and the hash value of step a2 gained.
The method that this video content is anti-tamper, can upgrade to magnanimity storage content quickly and easily, insert the anti-information of distorting, adding these anti-distorting after information, once after by hacker's video data of distorting, can make verification at broadcasting end, can find in time, and stop the video of being distorted played, and for the video content of new production, easily in the process of producing, implement the method and add the data of distorting, on the other hand at line service, the particularly wired or OTT business based on TS stream, can add in real time the anti-information of distorting, whether can detect in real time the anti-information of distorting at Set Top Box player sets up, thereby stop illegal hackers to be destroyed, the video data of distorting.
Detailed description of the invention
For the ease of understanding the present invention, will be described more fully the present invention with specific embodiment below. But the present invention can realize in many different forms, be not limited to embodiment described herein. On the contrary, providing the object of this embodiment is to make to the understanding of disclosure of the present invention more thoroughly comprehensively.
The anti-tamper method of video content of one embodiment of the invention, by self-defined a kind of structure, is inserted in TS or MP4 file, and self-defining structure comprises version number, pattern, file size and the hash value of hash algorithm.
For TS formatted file, self-defining structure is inserted in the pmt table of TS file, as follows for the customizing method of the structure of TS file:
A1, start to search for two continuous pmt tables from the head of TS file, the data between two pmt tables are obtained to a hash value with hash algorithm, and record the length of this hash value;
B1, a self-defined descriptor, content comprises descriptortag, version number, pattern, file size, and all information of the hash value of step a1 gained;
C1, search for first descriptor () of first pmt table in insert this self-defining descriptor.
In TS file, PMT is mainly used to describe the information of audio/video flow in this program stream, and the frequency occurring can not be less than 500ms (ETSITR101290), is to resolve TS file requisite table. In addition,, in the TS of Bao Changwei 188 bytes bag, a pmt table often has a large amount of padding datas. Therefore can in this padding data, insert self-defining descriptor, and not change the total length of file.
For playing end, as long as resolving in the process of pmt table, find this self-defining descriptor, explanation need to start anti-tamper mechanism. Play end and need to find continuous two PMT, and calculate the hash value of data between these two PMT with identical hash algorithm, and mate with the hash value in self-defining descriptor. If cannot mate, or there is no corresponding descriptor, illustrate that this section of content was tampered.
For MP4 formatted file, self-defining structure is inserted in MP4 file, and self-defining structure is a box, as follows for the customizing method of the structure of MP4 file:
A2, all key frames of MP4 file are obtained to a hash value with hash algorithm;
B2, a self-defined box, content comprises descriptortag, version number, pattern, file size, and the hash value of step a2 gained. This box need to deposit in videotrakbox, and stssbox peer (SyncSampleBox), is therefore conventionally placed on after stssbox.
For playing end, in resolving MP4 file, first calculate the hash value of key frame, and with MP4 file in box in the hash value of record contrast, if hash value do not mate, or this box not, supporting paper was tampered.
The anti-tamper method of this video content of the present embodiment, can upgrade to magnanimity storage content quickly and easily, insert the anti-information of distorting, adding these anti-distorting after information, once after by hacker's video data of distorting, can make verification at broadcasting end, can find in time, and stop the video of being distorted played, and for the video content of new production, easily in the process of producing, implement the method and add the data of distorting, on the other hand at line service, the particularly wired or OTT business based on TS stream, can add in real time the anti-information of distorting, whether can detect in real time the anti-information of distorting at Set Top Box player sets up, thereby stop illegal hackers to be destroyed, the video data of distorting.
The above embodiment has only expressed indivedual embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention. It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (5)
1. the anti-tamper method of video content, is characterized in that, self-defined a kind of structure, is inserted into TSOr in MP4 file, self-defining described structure comprise hash algorithm version number, pattern, file size andHash value.
2. the anti-tamper method of a kind of video content according to claim 1, is characterized in that, makes by oneselfThe described structure of justice is inserted in the pmt table of TS file, for the customizing method of the described structure of TS fileAs follows:
A1, in TS file, search for two continuous described pmt tables, by between two described pmt tablesData obtain a hash value with hash algorithm;
B1, a self-defined descriptor, content comprises descriptortag, version number, pattern, file size,And the described hash value of step a1 gained;
C1, search for first described in insert self-defining described descriptor in pmt table.
3. the anti-tamper method of a kind of video content according to claim 2, is characterized in that, from TSThe head of file starts to search for two continuous described pmt tables.
4. the anti-tamper method of a kind of video content according to claim 2, is characterized in that, is searchingRope obtain first described in insert self-defining described descriptor in first descriptor () of pmt table.
5. the anti-tamper method of a kind of video content according to claim 1, is characterized in that, makes by oneselfThe described structure of justice is inserted in MP4 file, and self-defining described structure is a box, for MP4 fileThe customizing method of described structure as follows:
A2, all key frames of MP4 file are obtained to a hash value with hash algorithm;
B2, a self-defined box, content comprises descriptortag, version number, pattern, file size,And the described hash value of step a2 gained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510976192.4A CN105611319B (en) | 2015-12-24 | 2015-12-24 | A kind of method that video content is anti-tamper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510976192.4A CN105611319B (en) | 2015-12-24 | 2015-12-24 | A kind of method that video content is anti-tamper |
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| Publication Number | Publication Date |
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| CN105611319A true CN105611319A (en) | 2016-05-25 |
| CN105611319B CN105611319B (en) | 2018-08-17 |
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| CN201510976192.4A Active CN105611319B (en) | 2015-12-24 | 2015-12-24 | A kind of method that video content is anti-tamper |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108769742A (en) * | 2018-07-10 | 2018-11-06 | 江苏省公用信息有限公司 | A kind of IPTV multicast contents tamper resistant method |
| CN109413444A (en) * | 2018-10-30 | 2019-03-01 | 苏州科达科技股份有限公司 | Completeness check data creation method, integrity checking method and the device of video |
| CN110366049A (en) * | 2019-08-05 | 2019-10-22 | 杭州当虹科技股份有限公司 | A kind of stream-type video completeness protection method |
| CN112468872A (en) * | 2020-10-14 | 2021-03-09 | 上海艾策通讯科技股份有限公司 | IP video consistency detection method and device, computer equipment and storage medium |
| CN113559506A (en) * | 2021-09-24 | 2021-10-29 | 深圳易帆互动科技有限公司 | Automatic testing method and device for frame synchronization and readable storage medium |
| CN114173149A (en) * | 2021-12-21 | 2022-03-11 | 杭州当虹科技股份有限公司 | Method for preventing inter cut |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108769742A (en) * | 2018-07-10 | 2018-11-06 | 江苏省公用信息有限公司 | A kind of IPTV multicast contents tamper resistant method |
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| CN114173149A (en) * | 2021-12-21 | 2022-03-11 | 杭州当虹科技股份有限公司 | Method for preventing inter cut |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105611319B (en) | 2018-08-17 |
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Address after: 310000 A Block, 16th Floor, E Building, Paradise Software Park, No. 3 Xidoumen Road, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Dang Hong Polytron Technologies Inc Address before: 310000 B2010, two floor, North (two), six and 368 Road, Binjiang District, Hangzhou, Zhejiang. Patentee before: HANGZHOU DANGHONG TECHNOLOGY CO., LTD. |