CN102045553A - Multimedia transcoding device and method and multimedia player - Google Patents
Multimedia transcoding device and method and multimedia player Download PDFInfo
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Abstract
The invention is applicable to the multimedia field and provides a transcoding device and method and a multimedia player. The multimedia transcoding device comprises a file receiving unit, a format analyzing unit and a transcoding unit, wherein the file receiving unit is used for receiving multimedia reference files and multimedia source files input by a user, the format analyzing unit is used for analyzing the multimedia reference files received by the file receiving unit to obtain parameters related to transcoding, the transcoding unit is used for transcoding the multimedia source files received by the file receiving unit according to the parameters related to transcoding and obtained by the format analyzing unit. In the embodiment of the invention, the multimedia transcoding device is realized by analyzing the received multimedia reference files to obtain related parameters required by transcoding and transcoding the received multimedia source files according to the related parameters required by transcoding, a transcoding format can be determined according to the received multimedia reference files, thereby bringing convenience for the use of common users.
Description
Technical field
The invention belongs to the multimedia field, relate in particular to a kind of multi-media transcoding device, method and multimedia play terminal.
Background technology
In today of high speed information development, multimedia technology has become essential important component in people's work, the study.And along with the continuous progress of network technology, its technology and application have obtained further development, become part with the fastest developing speed in the information industry.In order to promote further developing of multimedia service, satisfy people in routine work, the life to the different demands of multimedia service, some standardization bodies are directed to society and go up the multiple audio/video encoding standard that the different business demand has proposed.For example, H.263 standard at visual telephone and video conference business proposition, the Mpeg2 standard that proposes at DVB, HDTV and DVD, at the mpeg 4 standard of streaming media service exploitation in the network, and the H.264 standard etc. that high video compression performance, network close friend can be provided.
Owing to exist in the time of multiple multimedia coding standard, the media file that has different-format, their employed each other file formats, video format, compressed format etc. all have nothing in common with each other, and the requirement of the target device that in the different multimedia application compression efficiency, decompress(ion) speed, code stream is used etc. is all different.So may can run into a lot of difficulties in actual conditions, provide software or the hardware tools changed between the different multimedia coding standard just to be called the multi-media transcoding device.
Because the variation of the multimedia application of target device and use thereof, the for example at present relatively normal handheld device of using just comprises amusement equipment such as MP4, MP3, the PSP of various models and mobile phone etc., and existing multi-media transcoding device needs the user that the transcoding parameter is set earlier, could carry out transcoding according to the transcoding parameter that the user is provided with.But, for domestic consumer, be difficult in very complicated professional every transcoding parameter and select one group of transcoding parameter that adapts to own handheld device most, even all be difficult to select the parameter that on own handheld device, to play sometimes, so improved the threshold that the user uses the multi-media transcoding device virtually, be not easy to domestic consumer and use.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of multi-media transcoding device, and being intended to solve existing multi-media transcoding device needs the user to import the transcoding parameter, is not easy to the problem that domestic consumer uses.
The embodiment of the invention is achieved in that a kind of multi-media transcoding device, and described multi-media transcoding device comprises:
The file receiving element is used to receive multimedia reference paper and the multimedia source files that the user imports;
The format analysis unit is used to analyze the multimedia reference paper that described file receiving element receives, and obtains the required relevant parameter of transcoding; And
Transcoding units, the multimedia source files that the required relevant parameter of transcoding that is used for obtaining according to described format analysis unit receives described file receiving element carry out transcoding to be handled.
As a preferred embodiment of the present invention, described multimedia reference paper and multimedia source files are audio file, video file or audio-video document.
As another kind of preferred version of the present invention, the required relevant parameter of described transcoding comprises one or more in file container format, video format, video size, video frame rate, video code rate, audio format, audio code rate, audio sample rate, the audio track number.
As another preferred version of the present invention, described multi-media transcoding device also comprises:
Parameter storage unit is stored the required relevant parameter of transcoding that described format analysis element analysis obtains;
Parameter set unit is used for the relevant parameter of storing according to described parameter storage unit or the required relevant parameter of importing according to the user who receives of transcoding carried out the transcoded format setting to described transcoding units.
As another preferred version of the present invention, described multi-media transcoding device also comprises:
Network management unit, be used for communicating by letter with the webserver, obtain the multimedia file definition of the associated multimedia reference paper or the include file format parameter of webserver stores, and/or the multimedia file definition of uploading relevant multimedia reference paper or include file format parameter to the webserver;
Described file receiving element also is used for according to the described network management unit of selection information Control that receives user's input described format analysis unit being exported in the associated multimedia reference paper or the multimedia file definition of obtaining.
As another preferred version of the present invention, described multi-media transcoding device also comprises:
Broadcast unit is used to play the file that obtains after described transcoding units transcoding is handled.
Another purpose of the embodiment of the invention is to provide the multimedia play terminal that comprises above-mentioned multi-media transcoding device.
Another purpose of the embodiment of the invention is to provide a kind of multi-media transcoding method, and described method comprises:
Receive the multimedia reference paper of user's input;
The multimedia reference paper that analysis receives obtains the required relevant parameter of transcoding;
According to the required relevant parameter of the transcoding that obtains the multimedia source files that receives being carried out transcoding handles.
As a preferred embodiment of the present invention, the required relevant parameter of described transcoding comprises one or more in file container format, video format, video size, video frame rate, video code rate, audio format, audio code rate, audio sample rate, the audio track number.
As another kind of preferred version of the present invention, the multimedia reference paper that described analysis receives, the step that obtains the required relevant parameter of transcoding is afterwards further comprising the steps of:
Store the required relevant parameter of described transcoding;
Determine described transcoded format of the multimedia source files that receives being carried out the transcoding processing according to the relevant parameter of storage or according to the required relevant parameter of transcoding of the user's input that receives.
As another preferred version of the present invention, described method also comprises:
Communicate by letter with the webserver, the order that issues according to the selection information that receives user input or the webserver, obtain the multimedia file definition of the associated multimedia reference paper or the include file format parameter of webserver stores, and/or the multimedia file definition of uploading relevant multimedia reference paper or include file format parameter to the webserver.
As another preferred version of the present invention, the required relevant parameter of the transcoding that described basis obtains carried out step that transcoding handles to the multimedia source files that receives after, described method also comprised:
Play the file that obtains after transcoding is handled.
In embodiments of the present invention, by the multimedia reference paper that receives is analyzed, obtain the required relevant parameter of transcoding, and according to the required parameter of the transcoding that obtains the multimedia source files that receives is carried out transcoding and handle, realized a kind of multi-media transcoding device, can determine to carry out the form of transcoding according to the multimedia reference paper that receives, not need the user to import the required relevant parameter of transcoding, be convenient to domestic consumer and use.
Description of drawings
Fig. 1 is the structural representation of the multi-media transcoding device that provides of the embodiment of the invention;
Fig. 2 is the structural representation of the multi-media transcoding device that provides of another embodiment of the present invention;
Fig. 3 is the structural representation of the multi-media transcoding device that is connected with the webserver that provides of yet another embodiment of the invention;
Fig. 4 is the realization flow figure of the multi-media transcoding method that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In embodiments of the present invention,, obtain the required relevant parameter of transcoding, and according to the required parameter of the transcoding that obtains the multimedia source files that receives is carried out transcoding and handle by the multimedia reference paper that receives is analyzed.
Fig. 1 shows the structure of the multi-media transcoding device that the embodiment of the invention provides, and only shows the part relevant with the embodiment of the invention for convenience of explanation.
This multi-media transcoding device can be used for multimedia play terminal, for example DVD, CD, PC (Personal Computer, PC), mobile phone, MP4, MP3, PSP etc.This multi-media transcoding device can be to run on the unit that software unit, hardware cell or software and hardware in these multimedia play terminals combine, also can be used as independently, suspension member is integrated in these multimedia play terminals or runs in the application system of these multimedia play terminals, wherein:
In embodiments of the present invention, multimedia reference paper and multimedia source files can be audio file, video file or audio-video document.The multimedia reference paper is wanted the sample of the multimedia file format that is transcoded into for the user, for example, certain multimedia file A can not play on user's mobile phone, and the user can be with any one multimedia file that can play on its mobile phone as the multimedia reference paper; Multimedia source files wants to carry out the file of transcoding for the user.
Then, the relevant parameter of the multimedia reference paper that format analysis unit 102 Study document receiving elements 101 receive, this parameter is the required relevant parameter of transcoding units 103 transcodings, includes but not limited to file container format, video format, video size, video frame rate, video code rate, audio format, audio code rate, audio sample rate, audio track number etc.Format analysis unit 102 adopts employed format analysis technology in the existing multimedia player, for example file suffixes name coupling, multimedia form are enumerated coupling etc., or the relevant parameter of the multimedia reference paper that receives of extended formatting analytical technology analysis, after analyzing successfully, the relevant parameter that analysis obtains is imported transcoding units 103.
With the processing procedure of a concrete example explanation format analysis 102, suppose that the multimedia reference paper that the user provides is multimedia file A below, format analysis unit 102 can adopt following steps that it is carried out format analysis:
Step 1, judge whether the suffix name of multimedia file A is known Container Format (for example avi, mkv etc.), if be unknown format, then change step 2, if be known format, then read multimedia file A, obtain above-mentioned relevant parameter, and export the parameter that gets access to according to the sound that corresponding Container Format comprised, the formal definition of video flowing, if relevant parameter obtains unsuccessful, then also change step 2;
Step 2, use known Container Format to attempt resolving successively,, still fail to resolve successfully, then export and point out " this file can't be used as the multimedia reference paper " if enumerated all known vessel forms until resolving successfully to multimedia file A.
Fig. 2 is the structural representation of the multi-media transcoding device of another embodiment of the present invention raising, and wherein, transcoding units 103 comprises:
Audio/video flow separation module 1031, the definition multimedia source file separates obtaining audio stream and video flowing;
Audio frequency transcoding module 1032, the relevant parameter that obtains according to format analysis unit 102 is the target audio stream of the audio format of customer requirements with the audio stream transcoding that 1031 separation of audio/video flow separation module obtain;
Video code conversion module 1033, the relevant parameter that obtains according to format analysis unit 102 separates the target video stream that the video stream transcoding that obtains is the video format of customer requirements with audio/video flow separation module 1031;
Audio/video flow synthesis module 1034, the relevant parameter that obtains according to format analysis unit 102 merges target audio stream and the target video stream that transcoding obtains, and promptly obtains the multi-media objects file of user institute demand file form.
Here, transcoding units 103 according to the relevant parameter of format analysis module output to audio/video flow separation module 1031, audio frequency transcoding module 1032, video code conversion module 1033 and audio/video flow synthesis module 1034 are provided with, and after the multimedia source files that receives unit output, pass through audio/video flow separation module 1031 successively, audio frequency transcoding module 1032, video code conversion module 1033 and audio/video flow synthesis module 1034 are finished transcoding, obtain the identical multi-media objects file of form with the multimedia reference paper of user input, i.e. the multi-media objects file of user institute demand file form.
In addition, if multimedia source files is audio file or video file, after then the audio stream separation module is resolved and is learnt that multimedia source files is audio file or video file, directly export to audio frequency transcoding module 1032 or video code conversion module 1033, undertaken getting final product by the output of audio stream synthesis module behind the transcoding by audio frequency transcoding module 1032 or video code conversion module 1033.Certainly, for the multi-media transcoding device that only carries out audio frequency transcoding or video code conversion, transcoding units 103 also can include only audio frequency transcoding module 1032 or video code conversion module 1033.
Further, for the relevant parameter that inventory analysis obtains, analyze the relevant parameter that obtains before after restarting the multi-media transcoding device, still getting access to, as shown in Figure 2, as a preferred embodiment of the present invention, 103 of format analysis unit 102 and transcoding units, the multi-media transcoding device also comprises:
Parameter set unit 105 is carried out the transcoded format setting according to the relevant parameter of storing in the parameter storage unit 104 to transcoding units 103.
Here, receive the new multimedia reference paper of user input at file receiving element 101 after, the new multimedia reference paper that format analysis unit 102 Study document receiving elements 101 receive obtains the required relevant parameter of new transcoding.The new relevant parameter that parameter storage unit 104 usefulness format analysis unit 102 obtain upgrades the relevant parameter of having stored.Parameter set unit 105 can be after parameter storage unit 104 be upgraded the relevant parameter of having stored, or before 103 pairs of multimedia source files that receive of transcoding units are carried out the transcoding processing, transcoding units 103 is carried out the transcoded format setting according to the relevant parameter of storing in the parameter storage unit 104.
In addition, in order to increase the mode that the multi-media transcoding device is provided with transcoded format, make the professional user carry out the setting of transcoded format by direct input relevant parameter, parameter set unit 105 can also be carried out the transcoded format setting to transcoding units 103 according to the required relevant parameter of transcoding of the user's input that receives.
At this moment, the relevant parameter that is provided with according to parameter set unit 105 of transcoding units 103 multimedia source files that file receiving element 101 is received is carried out transcoding and is handled.If file receiving element 101 receives the multimedia reference paper of user's input again afterwards, then 102 pairs of format analysis unit obtain the required relevant parameter of transcoding for the multimedia reference paper analysis that receives, and with the required relevant parameter undated parameter memory cell 104 of the transcoding that obtains.Like this, parameter set unit 105 is after parameter storage unit 104 is upgraded the relevant parameter of having stored, or before 103 pairs of multimedia source files that receive of transcoding units are carried out the transcoding processing, relevant parameter according to storage in the parameter storage unit 104 carries out the transcoded format setting to transcoding units 103, just can realize that the multimedia source files that relevant parameter that transcoding units 103 obtains according to format analysis unit 102 receives file receiving element 101 carries out the transcoding processing.After parameter set unit 105 receives the required relevant parameter of the transcoding of user input once more, reset transcoding units 103, can realize that again multimedia source files that the required relevant parameter of transcoding of user's input that transcoding units 103 receives according to parameter set unit 105 receives file receiving element 101 carries out transcoding and handle.
Carry out exchanges data for the ease of the multi-media transcoding device and the webserver, improve its flexibility, ease for use, as shown in Figure 3, as another preferred embodiment of the present invention, multi-media transcoding device 10 also comprises:
At this moment, file receiving element 101 can also be exported to format analysis unit 102 with the associated multimedia reference paper or the multimedia file definition of obtaining according to the selection information Control network management unit 106 that receives user's input, to be obtained the required relevant parameter of transcoding by format analysis unit 102.
In embodiments of the present invention, network management unit 106 can be downloaded associated multimedia reference paper or multimedia file definition and storage receiving after the user selects the download function or the webserver to issue download command in the network data base of the webserver 30; Receiving after the user selects the upload function or the webserver 30 to issue upload command, relevant multimedia reference paper or multimedia file definition are uploaded to the webserver 30.Wherein, relevant multimedia reference paper can be the multimedia reference paper that receives of format analysis unit 102 or other by the multimedia reference paper of user by 101 inputs of file receiving element etc., and relevant multimedia file definition can be obtained by the relevant parameter that format analysis unit 102 obtains.Further, if the multi-media transcoding device comprises parameter storage unit 104, then relevant multimedia file definition can also be obtained by stored parameters in the parameter storage unit 104.
Further, as shown in Figure 2, as another preferred embodiment of the present invention, the multi-media transcoding device also comprises:
Fig. 4 shows the realization flow of the multi-media transcoding method that the embodiment of the invention provides, and details are as follows:
In step S401, receive the multimedia reference paper of user's input;
In step S402, analyze the multimedia reference paper that receives, obtain the required relevant parameter of transcoding;
In step S403, according to the required relevant parameter of the transcoding that obtains the multimedia source files that receives is carried out transcoding and handle.
In embodiments of the present invention, multimedia reference paper and multimedia source files can be audio file, video file or audio-video document, the multimedia reference paper is wanted the sample of the multimedia file format that is transcoded into for the user, multimedia source files wants to carry out the file of transcoding for the user.The required relevant parameter of transcoding includes but not limited to file container format, video format, video size, video frame rate, video code rate, audio format, audio code rate, audio sample rate, audio track number etc.Adopt employed format analysis technology in the existing multimedia player, for example file suffixes name coupling, multimedia form are enumerated coupling etc., or the relevant parameter of the multimedia reference paper that receives of extended formatting analytical technology analysis.Concrete processing procedure and realization repeat no more as mentioned above.
In order to increase the mode that the multi-media transcoding device is provided with transcoded format, make the professional user carry out the setting of transcoded format by direct input relevant parameter, as another preferred embodiment of the present invention, after step S402, the multi-media transcoding method also comprises:
The required relevant parameter of storage transcoding, this required relevant parameter can store in designated memory locations, client or the server etc.
Determine among the above-mentioned steps S403 multimedia source files that receives to be carried out the transcoded format that transcoding is handled according to the relevant parameter of storage or according to the required relevant parameter of transcoding of the user's input that receives.
Like this, be convenient to the user and select as required to determine transcoded format that its concrete processing procedure repeats no more as mentioned above by the required relevant parameter or the multimedia reference paper of transcoding of input.
Carry out exchanges data for the ease of the multi-media transcoding device and the webserver, improve its flexibility, ease for use, as a preferred embodiment of the present invention, the multi-media transcoding method also comprises:
Communicate by letter with the webserver, the order that issues according to the selection information that receives user input or the webserver, obtain the multimedia file definition of the associated multimedia reference paper or the include file format parameter of webserver stores, and/or the multimedia file definition of uploading relevant multimedia reference paper or include file format parameter to the webserver.
In embodiments of the present invention, can in the network data base of the webserver, download associated multimedia reference paper or multimedia file definition and storage receiving after the user selects the download function or the webserver to issue download command; Receiving after the user selects the upload function or the webserver to issue upload command, relevant multimedia reference paper or multimedia file definition are uploaded to the webserver.Wherein, relevant multimedia reference paper can be the multimedia reference paper that the user imports, relevant multimedia file definition can the relevant parameter that obtain obtains or stored parameters obtains by analyzing among the step S402, and specific implementation repeats no more as mentioned above.
Further, after step S403, the multi-media transcoding method also comprises:
Play the file that obtains after transcoding is handled.
One of ordinary skill in the art will appreciate that, realize that all or part of step in the foregoing description method is to instruct relevant hardware to finish by program, described program can be in being stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc., this program is used for carrying out following steps:
Receive the multimedia reference paper of user's input;
The multimedia reference paper that analysis receives obtains the required relevant parameter of transcoding;
According to the required relevant parameter of the transcoding that obtains the multimedia source files that receives being carried out transcoding handles.
In embodiments of the present invention, by the multimedia reference paper that receives is analyzed, obtain the required relevant parameter of transcoding, and according to the required parameter of the transcoding that obtains the multimedia source files that receives is carried out transcoding and handle, realized a kind of multi-media transcoding device, can determine to carry out the form of transcoding according to the multimedia reference paper that receives, not need the user to import the required relevant parameter of transcoding, be convenient to domestic consumer and use.
And,, can further improve flexibility, the ease for use of multi-media transcoding device by carrying out exchanges data with the webserver.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a multi-media transcoding device is characterized in that, described multi-media transcoding device comprises:
The file receiving element is used to receive multimedia reference paper and the multimedia source files that the user imports;
The format analysis unit is used to analyze the multimedia reference paper that described file receiving element receives, and obtains the required relevant parameter of transcoding; And
Transcoding units, the multimedia source files that the required relevant parameter of transcoding that is used for obtaining according to described format analysis unit receives described file receiving element carry out transcoding to be handled.
2. multi-media transcoding device as claimed in claim 1 is characterized in that, described multimedia reference paper and multimedia source files are audio file, video file or audio-video document.
3. multi-media transcoding device as claimed in claim 1, it is characterized in that the required relevant parameter of described transcoding comprises one or more in file container format, video format, video size, video frame rate, video code rate, audio format, audio code rate, audio sample rate, the audio track number.
4. multi-media transcoding device as claimed in claim 1 is characterized in that, described multi-media transcoding device also comprises:
Parameter storage unit is stored the required relevant parameter of transcoding that described format analysis element analysis obtains;
Parameter set unit is used for the relevant parameter of storing according to described parameter storage unit or the required relevant parameter of importing according to the user who receives of transcoding carried out the transcoded format setting to described transcoding units.
5. multi-media transcoding device as claimed in claim 1 is characterized in that, described multi-media transcoding device also comprises:
Network management unit, be used for communicating by letter with the webserver, obtain the multimedia file definition of the associated multimedia reference paper or the include file format parameter of webserver stores, and/or the multimedia file definition of uploading relevant multimedia reference paper or include file format parameter to the webserver;
Described file receiving element also is used for according to the described network management unit of selection information Control that receives user's input described format analysis unit being exported in the associated multimedia reference paper or the multimedia file definition of obtaining.
6. multi-media transcoding device as claimed in claim 1 is characterized in that, described multi-media transcoding device also comprises:
Broadcast unit is used to play the file that obtains after described transcoding units transcoding is handled.
7. multimedia play terminal that comprises each described multi-media transcoding device of claim 1 to 6.
8. a multi-media transcoding method is characterized in that, described method comprises:
Receive the multimedia reference paper of user's input;
The multimedia reference paper that analysis receives obtains the required relevant parameter of transcoding;
According to the required relevant parameter of the transcoding that obtains the multimedia source files that receives being carried out transcoding handles.
9. multi-media transcoding method as claimed in claim 8, it is characterized in that the required relevant parameter of described transcoding comprises one or more in file container format, video format, video size, video frame rate, video code rate, audio format, audio code rate, audio sample rate, the audio track number.
10. multi-media transcoding method as claimed in claim 8 is characterized in that, the multimedia reference paper that described analysis receives, and the step that obtains the required relevant parameter of transcoding is afterwards further comprising the steps of:
Store the required relevant parameter of described transcoding;
Determine described transcoded format of the multimedia source files that receives being carried out the transcoding processing according to the relevant parameter of storage or according to the required relevant parameter of transcoding of the user's input that receives.
11. multi-media transcoding method as claimed in claim 8 is characterized in that, described method also comprises:
Communicate by letter with the webserver, the order that issues according to the selection information that receives user input or the webserver, obtain the multimedia file definition of the associated multimedia reference paper or the include file format parameter of webserver stores, and/or the multimedia file definition of uploading relevant multimedia reference paper or include file format parameter to the webserver.
12. multi-media transcoding method as claimed in claim 8 is characterized in that, the required relevant parameter of the transcoding that described basis obtains carried out step that transcoding handles to the multimedia source files that receives after, described method also comprised:
Play the file that obtains after transcoding is handled.
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| CN102883189A (en) * | 2012-10-16 | 2013-01-16 | 北京千橡网景科技发展有限公司 | Video providing method and system |
| CN103036888A (en) * | 2012-12-19 | 2013-04-10 | 南京视海网络科技有限公司 | Self-adapting stream-media play method and self-adapting play unit |
| CN103036888B (en) * | 2012-12-19 | 2016-04-13 | 南京视海网络科技有限公司 | Adaptive flow media playing method and adaptive identifying unit thereof |
| CN103036889A (en) * | 2012-12-19 | 2013-04-10 | 常州中流电子科技有限公司 | Self-adapting streaming media displaying method and self-adapting streaming media displaying system |
| CN103686209A (en) * | 2013-12-13 | 2014-03-26 | 乐视网信息技术（北京）股份有限公司 | Transcoding and processing method and system with diverse mechanisms |
| CN105992050A (en) * | 2015-02-06 | 2016-10-05 | 广州市动景计算机科技有限公司 | Video downloading method and device |
| CN104768053A (en) * | 2015-04-15 | 2015-07-08 | 冯山泉 | Format conversion method and system based on streaming decomposition and streaming recombination |
| CN105142020A (en) * | 2015-08-10 | 2015-12-09 | 合一网络技术(北京)有限公司 | Method and system for converting video in unsupported format in mobile terminal |
| CN107483876A (en) * | 2017-07-21 | 2017-12-15 | 阔地教育科技有限公司 | Video data handling procedure, storage device, straight recorded broadcast interactive terminal |
| CN107529092A (en) * | 2017-09-30 | 2017-12-29 | 北京元心科技有限公司 | User equipment, multimedia information processing method and device |
| CN107820124A (en) * | 2017-11-10 | 2018-03-20 | 暴风集团股份有限公司 | Format conversion method, device and server |
| CN108184079A (en) * | 2017-12-29 | 2018-06-19 | 北京奇虎科技有限公司 | The merging method and device of a kind of multimedia file |
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