CN102811235A - Media file off-line downloading method and device and off-line downloading server - Google Patents
Media file off-line downloading method and device and off-line downloading server Download PDFInfo
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Abstract
The invention discloses a media file off-line downloading method and device and an off-line downloading server, which are used for solving the technical problem that the format and type of a media file downloaded by handheld equipment is easy to be unmatched with the formats and types of the media files supported by the handheld equipment when the traditional handheld equipment downloads media files. According to the invention, after the media files are subjected to off-line downloading, transcoding parameters fit for the handheld equipment are automatically matched, off-line transcoding is carried out for a user automatically according to the transcoding parameters, and the user finally acquires the media files fit for the self equipment model. According to the invention, the server automatically match and execute conversion of medial file formats for the user, therefore the process of transcoding by the user by self after downloading is saved, the downloading efficiency is improved, the waste of network bandwidth is reduced, the user time is saved and the multimedia entertainment one-stop server is achieved.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of media file off-line method for down loading, device and off-line Download Server that is applicable to handheld device.
Background technology
Along with the development of popularizing (MP4, PSP, mobile phone, panel computer) and software and hardware technology of handheld device, the hardware performance of these products and function are abundant gradually at present, and particularly the relevant amusement function of multimedia is powerful gradually; The general function that playback of media files all is provided; But the subject matter that these handheld devices exist at present is exactly that media formats is had strict requirement, and the equipment that has is only supported the MP4 form, and what have only supports the AVI form; What have only supports the 3GP form; Film source aspect handheld device is obtained relatively difficulty of resource, after the downloaded software that generally need utilize PC PC to hold earlier downloads to media file, removes to seek corresponding transcoding instrument again and changes into the form of supporting handheld device; This has just caused the waste of plenty of time; File in download possibly need the long time, and downloading needs the user effort plenty of time to remove transcoding again after accomplishing, and the transcoding instrument is also less relatively and use threshold also than higher in the market.
In addition; Though the particular requirement of handheld device to media file format satisfied through setting up methods such as mobile phone prefecture, IPad prefecture, PSP prefecture in some media resource websites; Higher operation cost converts the online movie resource to the form that is fit to particular handheld device but this method needs the website cost; And user's handheld device is of a great variety, is difficult to satisfy all users' demand, and several kinds of forms commonly used often can only be provided.
Summary of the invention
In view of this; Main purpose of the present invention is to provide a kind of media file off-line method for down loading, device and off-line Download Server that is suitable for handheld device; When being used to solve existing handheld device downloads of media file, be easy to generate form and the type of handheld device institute downloads of media file and media file format and the unmatched technical problem of type that handheld device is supported.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of media file off-line download apparatus, this device comprises:
The off-line download module is used for the request of receiving media file off-line downloading task, carries out media file off-line downloading task;
The file analysis module is used for off-line download module media files downloaded is carried out the identification of media file format;
The offline formats modular converter is used for mating the transcoding parameter that is suitable for said handheld device according to user's handheld device model, according to the transcoding parameter of coupling media file is carried out the offline formats conversion.
Further, carry said handheld device model in the request of said off-line downloading task, said offline formats modular converter obtains said handheld device model from said off-line download module.
Further, said file analysis module comprises:
The file format identification module is used for the media files downloaded form is discerned;
The data structure analysis module is used for according to the form corresponding file specification for structure of said media file the data structure of media file being analyzed;
The format conversion judge module is used for judging whether to carry out the offline formats conversion of media file according to the analysis result of data structure analysis module.
Further, said offline formats modular converter comprises:
The transcoding parameter database is used to store the transcoding parameter corresponding with various handheld device models;
Transcoding parameter matching module is used for according to the transcoding parameter of handheld device model in the suitable handheld device model of transcoding parameter database coupling;
The transcoding module is used for according to the transcoding parameter of said coupling media file being carried out the offline formats conversion.
Further, said transcoding module comprises:
Audio frequency and video separation module: be used for media file is resolved, the media file data of compressing is separated into audio compressed data stream and compressed video data stream;
Audio decoder module: be used to receive audio compressed data stream, audio compressed data stream is decoded, output original audio data stream;
Audio coding module: be used for according to the audio frequency transcoding parameter of the transcoding parameter of said transcoding parameter matching module coupling audio compressed data stream with original audio data stream encryption Cheng Xin;
Video decode module: be used to receive compressed video data stream, compressed video data stream is decoded, output original video data stream;
Video encoding module: be used for according to the video code conversion parameter of the transcoding parameter of said transcoding parameter matching module coupling compressed video data stream with original video data stream encryption Cheng Xin;
Audio frequency and video synthesis module: be used for new the audio compressed data stream and the new compressed video data stream of audio coding module and video encoding module output are merged into new media file.
Further, said transcoding parameter comprises video resolution, video code rate, video code model, video Container Format, audio coding form and audio code rate.
The present invention also proposes a kind of media file off-line method for down loading, and this method comprises:
Behind service end off-line downloads of media file, mate the transcoding parameter that is fit to user's handheld device model according to user's request, and carry out the offline formats conversion of media file according to said transcoding parameter according to the model of user's handheld device.
Further, behind service end off-line downloads of media file, said method also comprises:
File format to the off-line media files downloaded is discerned; Media file format corresponding file specification for structure according to being discerned is analyzed the data structure of media file, and judges whether to carry out the offline formats conversion of media file according to analysis result.
The present invention also proposes a kind of off-line Download Server, and this off-line Download Server is realized based on aforesaid media file off-line download apparatus and method.
The present invention can realize the off-line download and the intelligent code-transferring of media file; Can be according to the model of user's handheld device; Automatically coupling is fit to the transcoding parameter of this handheld device; After the off-line of accomplishing media file was downloaded, automatically for the user carries out the offline formats conversion, what the user finally obtained was the media file that is suitable for the equipment of itself model according to the transcoding parameter of being mated.The conversion of media file format is mated and is carried out in the present invention automatically for the user by service end; Save the process of own transcoding after the user's download, improved download efficiency, reduced the waste of the network bandwidth; Save user time, realized the one-stop service of multimedia recreation.
Description of drawings
Fig. 1 forms structural representation for a kind of functional module of the media file off-line download apparatus of handheld device that is applicable to provided by the invention;
Fig. 2 is that the functional module of embodiment of the invention file analysis module is formed structural representation;
Fig. 3 is that the functional module of offline formats modular converter in the embodiment of the invention is formed structural representation;
Fig. 4 is a kind of media file off-line method for down loading flow chart that is applicable to handheld device provided by the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below lift embodiment and with reference to accompanying drawing, to further explain of the present invention.
Fig. 1 forms structural representation for a kind of functional module of the media file off-line download apparatus of handheld device that is applicable to provided by the invention; This device 100 is applied in the off-line Download Server, and this device comprises: off-line download module 110, file analysis module 120, offline formats modular converter 130;
Off-line download module 110; Be used to receive the request of user about the off-line downloading task of media file; Carry out the off-line downloading task of media file, and the model of obtaining handheld device, and the handheld device model of obtaining is offered file analysis module 120 and offline formats modular converter 130;
Preferably, comprise the handheld device model in the request of said off-line downloading task, off-line download module 110 is resolved the said handheld device model of back storage, supplies other module to use when needed.Said handheld device model can be when the user sets up the off-line downloading task be obtained automatically or is selected to confirm by the user according to pre-configured unit type tabulation from handheld device; When downloading to same handheld device; The user only need select once to get final product, and uses when adding the off-line downloading task once more after handheld device storage user's selection result is provided with;
File analysis module 120; Be used for off-line download module 101 is downloaded the judgement that can the media file that finish carry out the identification of media file format and carry out carrying out the offline formats conversion; If the offline formats conversion is discerned successfully and can be carried out to file format, then notify offline formats modular converter 130 to carry out format conversion;
As shown in Figure 2, said file analysis module 120 further comprises:
File format identification module 121 is used for the media files downloaded form is discerned, and said identification comprises the form of discerning media file, the audio/video encoding/decoding parameter of media file etc.; For unrecognizable media file, then directly indicate the fault processing module error process of off-line download system, no longer carry out follow-up offline formats conversion operations.
Data structure analysis module 122, the form corresponding file specification for structure of the media file that is used for being discerned according to file format identification module 121 is analyzed the data structure of media file; The content of analyzing comprises: whether whether the data whether data structure of media file meets the corresponding standard of file format, media file complete, destroyed etc.
Format conversion judge module 123 is used for judging whether to carry out the offline formats conversion of media file according to the analysis result of data structure analysis module 122, and judged result is sent to offline formats modular converter 130.The foundation of said judgement includes but not limited to: whether whether can form, the file data form that discern media file meet file format corresponding standard, file data is destroyed etc., and the present invention can judge whether to carry out the offline formats conversion according to the analysis result of predetermined strategy binding data structural analysis module 122.
Offline formats modular converter 130 is used for mating the transcoding parameter that is suitable for handheld device according to user's handheld device model, and according to the transcoding parameter of coupling media file is carried out the offline formats conversion;
As shown in Figure 3, described offline formats modular converter 130 further comprises:
Transcoding parameter database 131; Be used to store the transcoding parameter corresponding with various handheld device models, the said transcoding parameter corresponding with the handheld device model comprises at least: video resolution, video code rate, video code model, video Container Format, audio coding form, audio code rate etc.
Transcoding parameter matching module 132: the transcoding parameter that is used for being fit in transcoding parameter database 131 couplings the handheld device model according to the handheld device model; And with the coupling audio frequency transcoding parameter send audio coding module 135 to, with the coupling the video code conversion parameter send video encoding module 137 to;
Transcoding module 139 is used for according to the transcoding parameter of said coupling media file being carried out the offline formats conversion;
Said transcoding module 139 further comprises:
Audio frequency and video separation module 133: be used for media file is resolved, the media file data of compressing is separated into audio compressed data stream and compressed video data stream;
Audio decoder module 134: be used to receive audio compressed data stream, audio compressed data stream is decoded, output original audio data stream;
Audio coding module 135: be used for the audio compressed data stream of original audio data stream according to audio frequency transcoding parameter coding Cheng Xin;
Video decode module 136: be used to receive compressed video data stream, compressed video data stream is decoded, output original video data stream;
Video encoding module 137: be used for the compressed video data stream of original video data stream according to video code conversion parameter coding Cheng Xin;
Audio frequency and video synthesis module 138: be used for new the audio compressed data stream and the new compressed video data stream of audio coding module 135 and video encoding module 137 outputs are merged into new media file;
Said new media file is the media file after the format conversion; The original media file is after format conversion; Convert the format that the handheld device that is suitable for asking off-line to download the original media file is fully play into, make the user not be used in and go to seek the manual format conversion of carrying out media file of conversion software after off-line is downloaded again that service end directly automatically performs the off-line conversion according to the model of handheld device for the user; Have great convenience for the user, promoted user's viscosity.
A kind of flow chart that is applicable to the media file off-line method for down loading of handheld device that Fig. 4 provides for the embodiment of the invention, this method comprises the steps:
Step 401: the user is after searching the media file of oneself liking or obtaining to download seed; Through the newly-built off-line downloading task of the off-line download system client on the handheld device; When adding the off-line downloading task of media file for the first time, the model that off-line download system client can point out the user to select handheld device, for example; If handheld device is a mobile phone, then point out the user to select mobile phone model; After the user added the off-line downloading task of media file, off-line download system client was carried the handheld device model that the user selects to the off-line downloading task request that the off-line Download Server sends media file in the request.
Step 402: after media file off-line download apparatus provided by the invention receives the off-line downloading task request of media file; Carried out the off-line of media file by off-line download module 110 and download, circular document analysis module 120 carried out file analysis after the off-line downloading task was accomplished;
Step 403: file analysis module 120 is discerned by 121 pairs of media files downloaded forms of file format identification module after receiving that message is accomplished in the download of off-line download module 110 transmissions, comprises identification file type, audio/video encoding/decoding form or the like;
Step 404: after identifying off-line media files downloaded type, data structure analysis module 122 is analyzed the data structure of media file according to the corresponding file specification for structure.Media file roughly is made up of three parts; The descriptor of file header (HEAD), file audio, video data (DATA), end-of-file index data (INDEX); File header has comprised global information; Comprise in the duration, file of file audio/video flow quantity etc., the index record of end-of-file the positional information of file data blocks, such as the corresponding data access address of N data block etc.If file data structure is no problem, then judge whether to carry out the offline formats conversion of media file again by format conversion judge module 123;
Step 405: if can carry out format conversion; Then transcoding parameter matching module 132 need be mated corresponding transcoding parameter according to user's handheld device model in transcoding parameter database 131; According to user's handheld device model, the transcoding parameter of coupling comprises at least: video resolution, video code rate, video code model, video Container Format, audio coding form, audio code rate etc.
With HTC G7 mobile phone is example, and the transcoding parameter that is suitable for HTC G7 model mobile phone is: video resolution is that 800X480, video code rate are that 768kbps, video code model MPGE4, video Container Format are that MP4, audio coding form are that AAC, audio code rate are 128kbps.
After the success of transcoding parameter matching, the video code conversion parameter of coupling to be passed to video encoding module 137 handle, the audio frequency transcoding parameter of coupling is passed to audio coding module 135 and is handled.
Step 406: audio frequency and video separation module 133 separates into independent audio data stream or video data stream with media file data, passes through the audio/video decoding module then, decodes to supply the not compression audio/video flow data flow of encoding;
Step 407: after not compressing audio and video data streams and being input to the audio/video coding module respectively; Coding module will be encoded according to corresponding audio frequency and video transcoding parameter and generated audio frequency and video packed data stream, and this step has promptly realized the conversion from the original audio/video coding form of media file to the audio/video coding form that is suitable for handheld device;
Step 408: the audio and video data streams after conversion is synthesized the media file of new suitable handheld device by audio frequency and video synthesis module 138.
Accomplish above-mentioned steps, the new media file download that the user can be successful with format conversion is play on the handheld device of oneself.
Pass through above-mentioned steps; The media file that the user can select arbitrarily oneself to like from the network media resource of magnanimity carries out the off-line download, and need not be concerned about whether the handheld device of oneself supports institute's downloads of media file format, carries out the conversion of media formats off-line for the user automatically by service end; Thereby solved the problem of puzzlement user's media format conversion; Greatly save user's wait and processing time, avoided the waste of network traffics, enriched the media entertainment of handheld device.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (10)
1. media file off-line download apparatus is characterized in that this device comprises:
The off-line download module is used for the request of receiving media file off-line downloading task, carries out media file off-line downloading task;
The file analysis module is used for off-line download module media files downloaded is carried out the identification of media file format;
The offline formats modular converter is used for mating the transcoding parameter that is suitable for said handheld device according to user's handheld device model, according to the transcoding parameter of coupling media file is carried out the offline formats conversion.
2. device according to claim 1 is characterized in that, carries said handheld device model in the request of said off-line downloading task, and said offline formats modular converter obtains said handheld device model from said off-line download module.
3. device according to claim 1 is characterized in that, said file analysis module comprises:
The file format identification module is used for the media files downloaded form is discerned;
The data structure analysis module is used for according to the form corresponding file specification for structure of said media file the data structure of media file being analyzed;
The format conversion judge module is used for judging whether to carry out the offline formats conversion of media file according to the analysis result of data structure analysis module.
4. device according to claim 1 is characterized in that, said offline formats modular converter comprises:
The transcoding parameter database is used to store the transcoding parameter corresponding with various handheld device models;
Transcoding parameter matching module is used for according to the transcoding parameter of handheld device model in the suitable handheld device model of transcoding parameter database coupling;
The transcoding module is used for according to the transcoding parameter of said coupling media file being carried out the offline formats conversion.
5. device according to claim 4 is characterized in that, said transcoding module comprises:
Audio frequency and video separation module: be used for media file is resolved, the media file data of compressing is separated into audio compressed data stream and compressed video data stream;
Audio decoder module: be used to receive audio compressed data stream, audio compressed data stream is decoded, output original audio data stream;
Audio coding module: be used for according to the audio frequency transcoding parameter of the transcoding parameter of said transcoding parameter matching module coupling audio compressed data stream with original audio data stream encryption Cheng Xin;
Video decode module: be used to receive compressed video data stream, compressed video data stream is decoded, output original video data stream;
Video encoding module: be used for according to the video code conversion parameter of the transcoding parameter of said transcoding parameter matching module coupling compressed video data stream with original video data stream encryption Cheng Xin;
Audio frequency and video synthesis module: be used for new the audio compressed data stream and the new compressed video data stream of audio coding module and video encoding module output are merged into new media file.
6. device according to claim 1 is characterized in that, said transcoding parameter comprises video resolution, video code rate, video code model, video Container Format, audio coding form and audio code rate.
7. media file off-line method for down loading is characterized in that this method comprises:
Behind service end off-line downloads of media file, mate the transcoding parameter that is fit to user's handheld device model according to user's request, and carry out the offline formats conversion of media file according to said transcoding parameter according to the model of user's handheld device.
8. method according to claim 7 is characterized in that, behind service end off-line downloads of media file, said method also comprises:
File format to the off-line media files downloaded is discerned; Media file format corresponding file specification for structure according to being discerned is analyzed the data structure of media file, and judges whether to carry out the offline formats conversion of media file according to analysis result.
9. method according to claim 8 is characterized in that, said transcoding parameter comprises video resolution, video code rate, video code model, video Container Format, audio coding form and audio code rate.
10. an off-line Download Server is characterized in that, said off-line Download Server comprises media file off-line download apparatus as claimed in claim 1.
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CN103702172A (en) * | 2013-12-13 | 2014-04-02 | 乐视网信息技术(北京)股份有限公司 | Method and system for carrying out dolby transcoding on AV (Audio/Video) |
CN107294948A (en) * | 2016-04-12 | 2017-10-24 | 百度(美国)有限责任公司 | Handle computer implemented method, device and the data handling system of media data |
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CN109361933A (en) * | 2018-11-13 | 2019-02-19 | 仲恺农业工程学院 | Audio and video information processing method |
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