CN105516737A - Multimedia format file conversion method - Google Patents
Multimedia format file conversion method Download PDFInfo
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- CN105516737A CN105516737A CN201510875091.8A CN201510875091A CN105516737A CN 105516737 A CN105516737 A CN 105516737A CN 201510875091 A CN201510875091 A CN 201510875091A CN 105516737 A CN105516737 A CN 105516737A
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- file
- multimedia
- format
- described multimedia
- conversion method
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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
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234336—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by media transcoding, e.g. video is transformed into a slideshow of still pictures or audio is converted into text
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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]
- H04N21/40—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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440236—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by media transcoding, e.g. video is transformed into a slideshow of still pictures, audio is converted into text
Abstract
The invention discloses a multimedia format file conversion method, comprising following steps: obtaining a file of which format needs to be converted; judging whether the format of the file is multimedia format; initializing the multimedia format file; sending the multimedia format file to a multimedia conversion node; carrying out format conversion to the multimedia format file. According to the multimedia format file conversion method disclosed by the invention, the multimedia format file is converted by a P2P (peer to peer) node; the file format conversion speed is effectively improved; and the processing load of the server and the user terminal is reduced.
Description
Technical field
The present invention relates to computer documents process field, and in particular to a kind of conversion method of multimedia form file.
Background technology
Along with the development of the Internet, utilize network to carry out live or program request and become a kind of trend gradually, slowly be dissolved in daily life, form focus in work, study and the various aspects such as amusement, be video conference, that online education or Web TV, video website are all applied is more and more extensive.Particularly under the universal overall background of computer, intelligent mobile terminal and WIFI, 3G, 4G wireless network, user to watch activity that is live or program request online by computer or intelligent mobile terminal equipment and user will be made to obtain relevent information become more convenient in any place having network to connect.The activity such as online education, video conference is able to present to end user preferably by multimedia form by live or order program service.
The application such as existing online education, video conference often can use interactive electronic blackboard as demo platform; very important effect has been served in raising quality of presentation and efficiency; in interactive electronic blackboard, the use of shared document is more and more frequent; presentation file (as office document, PDF document, multimedia file etc.) can be uploaded to demo platform and open by user, can carry out annotating and commenting on and the operation such as explanation in presentation process.When the presentation file of different-format is uploaded to demo platform, the interactive demonstration file format that it is supported can be converted to.
Described file format transfer process is usually put on user terminal or server and completes, when file format conversion is carried out at user terminal, general principle due to transcoding is first decoded to file, then encode by the coded system of the form that will change, need to carry out a large amount of data processing work, thus need to carry out the longer time, the home computer general for cpu performance or intelligent mobile terminal equipment, burden is heavier, conversion efficiency is lower, relatively large file is when carrying out format conversion, wait for that the time that format conversion completes becomes and cannot stand, the overlong time of file format conversion can make Consumer's Experience poor.And when file format conversion is carried out on the server, the user terminal of serving due to it is more, and the task of carrying out file format conversion also can be more simultaneously simultaneously, this can cause larger burden to server, thus affects providing of other services.
Peer-to-peer network is emerging network technology recent years, relative to traditional C/S model, the feature of a P2P pattern highly significant be exactly node without the need to Dependency Set Chinese style server resource, each node can directly communicate.P2P is the abbreviation of peer to peer connection peertopeer pattern.P2P technology is a kind of between different terminals user, without the technology of the direct swap data of trunking or service.It has broken traditional Client/Server pattern, and in a peer-to-peer network, the status of each node is identical, possesses client and server double grading, can simultaneously as service user and ISP.The core of P2P utilizes user resources, carries out file transfer by Peer, and this is different from traditional client server computation model completely.P2P, by the design of " decentralization " and multicast communication mechanism, achieves not reliance server and swap file fast.
How in Appropriate application P2P network, the idling-resource of subscriber terminal equipment carries out file format conversion, is technical problem solved by the invention.
Summary of the invention
The present invention proposes a kind of conversion method of multimedia form file, and P2P node can be utilized to carry out multimedia form file transform, effectively improves the speed of file format conversion, and reduces the processing load of server and user terminal.
In order to achieve the above object, the present invention proposes a kind of conversion method of multimedia form file, comprises the following steps:
Obtain and need the file carrying out format conversion;
Whether the form judging described file is multimedia form;
Initialization process is carried out to described multimedia form file;
Described multimedia form file is sent to multimedia switching node;
Format conversion processing is carried out to described multimedia form file.
Further, described multimedia form determination methods is for judge according to file suffixes name.
Further, when described file is document format, sends it to document subject feature vector node and carry out format conversion.
Further, the initialization process of described multimedia form file, for judge that described file is picture format or audio frequency and video form, judges that when it does not belong to this two classes form described file is as illegal file and announcement server.
Further, when described multimedia form file is picture format, judge whether it is JPG form, GIF form or BMP form, and judge whether to need to process file size and resolution.
Further, when described multimedia form file is audio frequency and video form, judge that it is audio format or video format, when described multimedia file is audio format, described multimedia switching node is converted into MP3 format file, when described multimedia file is video format, after described multimedia switching node is first converted into FLV formatted file, be converted to MP4 formatted file again.
Further, described multimedia form file transform task is distributed according to following principle:
When distributing convert task first, described multimedia form file is distributed successively according to multimedia switching node order;
When described multimedia switching node often receives a convert task, marked and subtracted 1;
When described multimedia switching node often completes a convert task, marked and added 1;
When needing when there being newly-increased convert task to distribute, distributed to the most much higher media conversion node of current scoring, the scoring initial value of wherein said each multimedia switching node is 100.
Further, described multimedia switching node is the node server in P2P network.
Further, described multimedia switching node is the server or virtual machine disposed in advance.
The conversion method of the multimedia form file that the present invention proposes, the server utilizing P2P node or service provider to dispose in advance or virtual machine carry out format conversion to multimedia form file, by the mode that multimedia switching node dynamic grading is sorted, conversion subtask is reasonably distributed, effectively improve the efficiency of file format conversion, avoid simultaneously and adopt server or user terminal to carry out file format conversion, reduce the processing load of server or user terminal.
Accompanying drawing explanation
Figure 1 shows that the conversion method flow chart of the multimedia form file of present pre-ferred embodiments.
Embodiment
Provide the specific embodiment of the present invention below in conjunction with accompanying drawing, but the invention is not restricted to following execution mode.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only for object that is convenient, the aid illustration embodiment of the present invention lucidly.
Please refer to Fig. 1, Figure 1 shows that the conversion method flow chart of the multimedia form file of present pre-ferred embodiments.The present invention proposes a kind of conversion method of multimedia form file, comprises the following steps:
Step S100: obtain and need the file carrying out format conversion;
Step S200: whether the form judging described file is multimedia form;
Step S300: initialization process is carried out to described multimedia form file;
Step S400: described multimedia form file is sent to multimedia switching node;
Step S500: format conversion processing is carried out to described multimedia form file.
According to present pre-ferred embodiments, described multimedia form determination methods is for judge according to file suffixes name.When described file is document format, sends it to document subject feature vector node and carry out format conversion.The suffix name of described document format file comprises the file suffixes name corresponding to document files that ppt file, word file, excel file, pdf file and system are supported.When the suffix name of file belong to above-mentioned support document files suffix name one of them time, judge that it is document format file.Such as, when file suffixes is called .doc or .docx, judge that it is word file.When the suffix name of described file does not belong to document format or the multimedia form of system support, judge that it is illegal file and announcement server.It should be noted that when judging file actual types, the actual types of such as file is BMP, and the suffix of file is called JPG, although support the type file, still thinks that this file is illegal file.
Further, the initialization process of described multimedia form file, for judge that described file is picture format or audio frequency and video form, judges that when it does not belong to this two classes form described file is as illegal file and announcement server.Such as when the suffix of described file is called JPG, GIF or BMP, judge that it is picture format file, when the suffix of described file is called MP3, MP4 or ASF, judge that it is audio frequency and video formatted file.
When carrying out the initialization process of multimedia form file, when described multimedia form file is picture format, judge whether it is JPG form, GIF form or BMP form, and judge whether to need to process file size and resolution, to adapt to dimension of picture needed for demo platform size or user.When judging that described file format is JPG or GIF, do not need to carry out processing direct unloading picture, when judging that described file is BMP form, needing described file transform is JPG form.If file is greater than 8M, then equal proportion convergent-divergent file, if file is longer or wider than 2000 pixels, then equal proportion convergent-divergent file.
When described multimedia form file is audio frequency and video form, judge that it is audio format or video format, when described multimedia file is audio format, described multimedia switching node is converted into MP3 format file, when described multimedia file is video format, after described multimedia switching node is first converted into FLV formatted file, be converted to MP4 formatted file again.The actual types of some audio-video document may be ASF, then these files are used as normal file process.
According to present pre-ferred embodiments, described multimedia form file transform task is distributed according to following principle:
When distributing convert task first, described multimedia form file is distributed successively according to multimedia switching node order;
When described multimedia switching node often receives a convert task, marked and subtracted 1;
When described multimedia switching node often completes a convert task, marked and added 1;
When needing when there being newly-increased convert task to distribute, distributed to the most much higher media conversion node of current scoring, the scoring initial value of wherein said each multimedia switching node is 100.
Such as, current have 20 multimedia form files to need to carry out format conversion, and the quantity of multimedia switching node is 5, when distributing convert task first, be followed successively by 5 multimedia switching nodes according to node order and distribute a multimedia form file format convert task, after the scoring of described 5 multimedia switching nodes is all subtracted 1, become 99 points, then remaining multimedia form file format convert task is distributed, the scoring of whole 5 multimedia switching nodes is judged in assigning process, the most much higher media conversion node of current scoring is selected to carry out task matching, if multiple multimedia switching node has identical best result, distribute according to node sequence, if 5 convert task of such as now front sub-distribution all do not complete, then the scoring of 5 multimedia switching nodes is all 99 points, follow-up 5 convert task distribute to this 5 multimedia switching nodes according to node order successively, and become 98 points after their scoring is all subtracted 1,
Marked after convert task if certain multimedia switching node has taken the lead in and added 1, namely the scoring of this multimedia switching node adds 1 and becomes 99 points, then an ensuing convert task just distributes to this multimedia switching node, again the scoring of this multimedia switching node is subtracted 1 and become 98 points, subsequent conversion task is carried out judgement according to above principle equally and is distributed, until all multimedia convert task is assigned.
Described multimedia switching node is the node server in P2P network.Further, described multimedia switching node is the server or virtual machine disposed in advance.Described multiple servers or virtual machine composition server cluster carry out distribution processor to file format conversion subtask, and the server that service provider adopts oneself to dispose or virtual machine can strengthen the stability of Transformation Service.
The conversion method of the multimedia form file that the present invention proposes, the server utilizing P2P node or service provider to dispose in advance or virtual machine carry out format conversion to multimedia form file, by the mode that multimedia switching node dynamic grading is sorted, conversion subtask is reasonably distributed, effectively improve the efficiency of file format conversion, avoid simultaneously and adopt server or user terminal to carry out file format conversion, reduce the processing load of server or user terminal.
Although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (9)
1. a conversion method for multimedia form file, is characterized in that, comprises the following steps:
Obtain and need the file carrying out format conversion;
Whether the form judging described file is multimedia form;
Initialization process is carried out to described multimedia form file;
Described multimedia form file is sent to multimedia switching node;
Format conversion processing is carried out to described multimedia form file.
2. the conversion method of multimedia form file according to claim 1, is characterized in that, described multimedia form determination methods is for judge according to file suffixes name.
3. the conversion method of multimedia form file according to claim 1, is characterized in that, when described file is document format, sends it to document subject feature vector node and carries out format conversion.
4. the conversion method of multimedia form file according to claim 1, it is characterized in that, the initialization process of described multimedia form file, for judge that described file is picture format or audio frequency and video form, judges that when it does not belong to this two classes form described file is as illegal file and announcement server.
5. the conversion method of multimedia form file according to claim 4, it is characterized in that, when described multimedia form file is picture format, judge whether it is JPG form, GIF form or BMP form, and judge whether to need to process file size and resolution.
6. the conversion method of multimedia form file according to claim 4, it is characterized in that, when described multimedia form file is audio frequency and video form, judge that it is audio format or video format, when described multimedia file is audio format, described multimedia switching node is converted into MP3 format file, when described multimedia file is video format, is converted to MP4 formatted file again after described multimedia switching node is first converted into FLV formatted file.
7. the conversion method of multimedia form file according to claim 1, is characterized in that, described multimedia form file transform task is distributed according to following principle:
When distributing convert task first, described multimedia form file is distributed successively according to multimedia switching node order;
When described multimedia switching node often receives a convert task, marked and subtracted 1;
When described multimedia switching node often completes a convert task, marked and added 1;
When needing when there being newly-increased convert task to distribute, distributed to the most much higher media conversion node of current scoring, the scoring initial value of wherein said each multimedia switching node is 100.
8. the conversion method of multimedia form file according to claim 1, is characterized in that, described multimedia switching node is the node server in P2P network.
9. the conversion method of multimedia form file according to claim 1, is characterized in that, described multimedia switching node is the server or virtual machine disposed in advance.
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