CN104796759A - Method and device for extracting one-channel audio frequency from multiple-channel audio frequency - Google Patents
Method and device for extracting one-channel audio frequency from multiple-channel audio frequency Download PDFInfo
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Abstract
The invention discloses a method and device for extracting one-channel audio frequency from multiple-channel audio frequency. The device is used for extracting designated one-channel audio frequency from a video file with multiple-channel audio frequency, convenience in use is brought to users, and support is provided for video in subsequent transcoding and playing. The method includes: delidding the video file with the multiple-channel audio frequency to acquire multiple-channel audio data in mixed storage; according to the storage format and number of samples of the multiple-channel audio data, extracting all segmented audio data of the designated one-channel audio frequency from the multiple-channel audio frequency data in mixed storage. By the resampling mode, all the segmented audio data of the designated one-channel audio frequency are synthesized into one audio stream. The purpose of extracting the designated one-channel audio frequency from the video file with the multiple-channel audio frequency is realized.
Description
Technical field
The present invention relates to multimedia technology field, particularly a kind of method and device extracting a road audio frequency from multichannel voice frequency.
Background technology
Along with network develops rapidly, the application that video is relevant is more and more universal, and the form of video file is also more and more various.At present, video file format mainly contains FLV, DV, MP4, MKV, MOV, TS, 3GP etc., and wherein, in these forms such as FLV, DV, MP4, Audio and Video is two streams, and each be single stream.And Audio and Video can be all multiple stream in these forms of MKV, MOV, TS.But, existing video decode instrument can only be single flow to into, single stream exports.Therefore, need a kind ofly to extract appointment one road audio frequency from the video file of multichannel voice frequency, be user-friendly to, also for video carries out transcoding below and broadcasting provides support.
Summary of the invention
The invention provides a kind of from multichannel voice frequency, extract a road audio frequency method and device, appointment one road audio frequency can be extracted from the video file of multichannel voice frequency, be user-friendly to, also for video carries out transcoding below and broadcasting provides support.
The invention provides a kind of method extracting a road audio frequency from multichannel voice frequency, comprising:
Decapsulation is carried out to the video file with multichannel voice frequency, obtains mixing the multi-path audio-frequency data stored;
According to storage format and the number of samples of multi-path audio-frequency data, from the multi-path audio-frequency data that described mixing stores, extract all segmentation voice datas of a road audio frequency of specifying;
By resampling mode, all segmentation voice datas of a described road audio frequency of specifying are synthesized an audio stream.
Some beneficial effects of the embodiment of the present invention can comprise:
From the video file of multichannel voice frequency, obtain the segment data of appointment one road audio frequency, then by resampling mode, this segment data is synthesized an audio stream.Thus reach extract appointment one road audio frequency object from the video file of multichannel voice frequency, be user-friendly to, also for video carries out transcoding below and broadcasting provides support.
In one embodiment, the described storage format according to multi-path audio-frequency data and number of samples, before extracting all segmentation voice datas of a road audio frequency of specifying, also comprise step from the multi-path audio-frequency data that described mixing stores:
The storage format of described multi-path audio-frequency data is determined by the described corresponding relation with the sound channel layout of the video file of multichannel voice frequency and the value of channel number and storage format.
In this embodiment, the storage format of the sound channel layout of the video file of multichannel voice frequency and the corresponding audio frequency of each value of channel number, also multi-path audio-frequency data storage format is just aware of after knowing value, according to this storage format and number of samples, all segmentation voice datas extracting a road audio frequency of specifying from multi-path audio-frequency data can be completed.
In one embodiment, the value of the sound channel layout of described multi-path audio-frequency data, channel number and number of samples, from described have the source data of the video file of multichannel voice frequency obtain.
In one embodiment, when the described video file with multichannel voice frequency is WMV form, the value of the sound channel layout of the video file of this multichannel voice frequency is taken as 3.
In one embodiment, a described road audio frequency of specifying is the audio frequency of appointed language.
In this embodiment, extract the audio frequency that audience is familiar with the language that language or user specify, reach the object of the experience sense drastically increasing audience.
In one embodiment, extract all segmentation voice datas of the audio frequency of appointed language in the multi-path audio-frequency data stored from described mixing before, also step is comprised:
According to the described video file format with multichannel voice frequency, from described, there is the language message obtaining each road audio frequency the information header of the video file of multichannel voice frequency;
According to the language message of each road audio frequency obtained, determine the voice data Shi Na road audio frequency of appointed language.
In this embodiment, according to the language message with each road audio frequency recorded in the video file information head of multichannel voice frequency, extract a road voice data of appointed language, realize the audio frequency object extracting appointed language from the video file of multichannel voice frequency.
From multichannel voice frequency, extract a device for a road audio frequency, comprising:
Video decapsulation module, reception has the video file of multichannel voice frequency and carries out decapsulation to it, obtains the multi-path audio-frequency data of mixing storage and exports;
Audio parsing data extraction module, for according to the storage format of multi-path audio-frequency data and number of samples, extracts all segmentation voice datas of a road audio frequency of specifying the multi-path audio-frequency data that the mixing exported from described video decapsulation module stores;
Synthesis module, all segmentation voice datas for the road audio frequency of specifying described audio parsing data extraction module obtained by resampling mode synthesize an audio stream.
In one embodiment, the described device extracting a road audio frequency from multichannel voice frequency, also comprises:
Audio storage form acquisition module, for from the described value with sound channel layout, channel number and the number of samples obtaining described multi-path audio-frequency data in the source data of the video file of multichannel voice frequency, and the corresponding relation described in passing through with the sound channel layout of the video file of multichannel voice frequency and the value of channel number and storage format determines the storage format of described multi-path audio-frequency data, and the storage format of multi-path audio-frequency data and number of samples are sent to described audio parsing data extraction module.
In one embodiment, the value of the sound channel of the video file of described multichannel voice frequency, when the described video file with multichannel voice frequency is WMV form, is taken as 3 by described audio storage form acquisition module.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is a kind of flow chart extracting the method for a road audio frequency from multichannel voice frequency in the embodiment of the present invention;
A kind of flow chart extracting the method for a road audio frequency from multichannel voice frequency that Fig. 2 provides for the embodiment of the present invention one;
A kind of flow chart extracting the method for a road audio frequency from multichannel voice frequency that Fig. 3 provides for the embodiment of the present invention two;
Fig. 4 a kind ofly in the embodiment of the present invention extracts one of structural representation of the device of a road audio frequency from multichannel voice frequency;
Fig. 5 is a kind of structural representation two extracting the device of a road audio frequency from multichannel voice frequency in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Fig. 1 is a kind of flow chart extracting the method for a road audio frequency from multichannel voice frequency in the embodiment of the present invention, comprises the following steps:
Step S101: carry out decapsulation to the video file with multichannel voice frequency, obtains mixing the multi-path audio-frequency data stored.
Step S102: according to storage format and the number of samples of multi-path audio-frequency data, extracts all segmentation voice datas of a road audio frequency of specifying from the multi-path audio-frequency data that mixing stores.At present, the multichannel voice frequency that decapsulation video file obtains is that mixing stores.The object stored is called Planar plane, and namely mixing is stored in Planar plane.Store line by line.Such as, first paragraph is one section of first via audio frequency (or claim track), and second segment is one section of the second road audio frequency, and the 3rd section is a section of the 3rd road audio frequency, and multichannel voice frequency mixes.Be aware of storage format, a road audio frequency of specifying can be extracted according to this storage format.According to number of samples, this segment data is read out, extract the one piece of data of a road audio frequency.
All segmentation voice datas of the one road audio frequency of specifying are synthesized an audio stream by step S103: by resampling mode.
The technical scheme that the embodiment of the present invention provides, obtains the segment data of appointment one road audio frequency from the video file of multichannel voice frequency, then by resampling mode, this segment data is synthesized an audio stream.Thus reach extract appointment one road audio frequency object from the video file of multichannel voice frequency, be user-friendly to, also for video carries out transcoding below and broadcasting provides support.
Embodiment one
A kind of flow chart extracting the method for a road audio frequency from multichannel voice frequency that Fig. 2 provides for the embodiment of the present invention one, as shown in Figure 2, the method that this embodiment one provides comprises step S201-S204:
Step S201: carry out decapsulation to the video file with multichannel voice frequency, obtains mixing the multi-path audio-frequency data stored.
Step S202: by the storage format of the corresponding relation determination multi-path audio-frequency data of the sound channel layout of video file and the value of channel number and storage format with multichannel voice frequency.
Wherein, the storage format of the corresponding audio frequency of each value due to audio track layout and channel number, therefore after knowing value, be also just aware of storage format, its center audio channel layout and channel number generally can obtain from video source (source data also claims metadata).
Step S203: according to storage format and the number of samples of multi-path audio-frequency data, extracts all segmentation voice datas of a road audio frequency of specifying from the multi-path audio-frequency data that mixing stores.
All segmentation voice datas of the one road audio frequency of specifying are synthesized an audio stream by step S204: by resampling mode.
The technical scheme that the embodiment of the present invention one provides, the storage format of the sound channel layout of the video file of multichannel voice frequency and the corresponding audio frequency of each value of channel number, also multi-path audio-frequency data storage format is just aware of after knowing value, according to this storage format and number of samples, all segmentation voice datas extracting a road audio frequency of specifying from multi-path audio-frequency data can be completed.
In one embodiment, the value of the sound channel layout of multi-path audio-frequency data, channel number and number of samples, from have multichannel voice frequency video file source data obtain.
In one embodiment, when the video file with multichannel voice frequency is WMV form, the value of the sound channel layout of the video file of this multichannel voice frequency is taken as 3.
In one embodiment, a road audio frequency of specifying is the audio frequency of appointed language.
The technical scheme that the embodiment of the present invention one provides, extracts the audio frequency that audience is familiar with language, reaches the object of the experience sense drastically increasing audience.
Embodiment two
A kind of flow chart extracting the method for a road audio frequency from multichannel voice frequency that Fig. 3 provides for the embodiment of the present invention two, as shown in Figure 3, the method that this embodiment two provides comprises step S301-S304:
Step S301: carry out decapsulation to the video file with multichannel voice frequency, obtains mixing the multi-path audio-frequency data stored.
Step S302: by the storage format of the corresponding relation determination multi-path audio-frequency data of the sound channel layout of video file and the value of channel number and storage format with multichannel voice frequency.
Step S303: according to the video file format with multichannel voice frequency, from have multichannel voice frequency video file information header obtain the language message of each road audio frequency.
Such as, when the video file format with multichannel voice frequency is MKV file, because MKV file has its specific form, therefore by finding its Track information header in MKV file, and therefrom read Language field information in TrackEntry corresponding to each road audio frequency, the language message of each road audio frequency can be identified thus fast.
Step S304: according to the language message of each road audio frequency obtained, determine the voice data Shi Na road audio frequency of appointed language.
Step S305: according to storage format and the number of samples of multi-path audio-frequency data, extracts all segmentation voice datas of a road audio frequency of specifying from the multi-path audio-frequency data that mixing stores;
All segmentation voice datas of the one road audio frequency of specifying are synthesized an audio stream by step S306: by resampling mode.
The technical scheme that the embodiment of the present invention two provides, according to the language message with each road audio frequency recorded in the video file information head of multichannel voice frequency, extract a road voice data of appointed language, realize the audio frequency object extracting appointed language from the video file of multichannel voice frequency.
Corresponding to a kind of method extracting a road audio frequency from multichannel voice frequency that above-described embodiment provides, the embodiment of the present invention also provides a kind of device extracting a road audio frequency from multichannel voice frequency, as shown in Figure 4, comprising:
Video decapsulation module 41, reception has the video file of multichannel voice frequency and carries out decapsulation to it, obtains the multi-path audio-frequency data of mixing storage and exports;
Audio parsing data extraction module 42, for according to the storage format of multi-path audio-frequency data and number of samples, extracts all segmentation voice datas of a road audio frequency of specifying the multi-path audio-frequency data that the mixing exported from video decapsulation module 41 stores;
Synthesis module 43, all segmentation voice datas for the road audio frequency of specifying audio parsing data extraction module 43 obtained by resampling mode synthesize an audio stream.
In one embodiment, the device of what the embodiment of the present invention provided extract from a multichannel voice frequency road audio frequency, as shown in Figure 5, also comprises:
Audio storage form acquisition module 51, for from have multichannel voice frequency video file source data in obtain the value of the sound channel layout of multi-path audio-frequency data, channel number and number of samples, and the storage format of corresponding relation determination multi-path audio-frequency data by the sound channel layout of video file with multichannel voice frequency and the value of channel number and storage format, and the storage format of multi-path audio-frequency data and number of samples are sent to audio parsing data extraction module 42.
In one embodiment, the value of the sound channel of the video file of multichannel voice frequency, when the video file with multichannel voice frequency is WMV form, is taken as 3 by audio storage form acquisition module 51.
A kind of device extracting a road audio frequency from multichannel voice frequency that the embodiment of the present invention provides, obtains the segment data of appointment one road audio frequency from the video file of multichannel voice frequency, then by resampling mode, this segment data is synthesized an audio stream.Thus reach extract appointment one road audio frequency object from the video file of multichannel voice frequency, be user-friendly to, also for video carries out transcoding below and broadcasting provides support.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (9)
1. from multichannel voice frequency, extract a method for a road audio frequency, it is characterized in that, comprising:
Decapsulation is carried out to the video file with multichannel voice frequency, obtains mixing the multi-path audio-frequency data stored;
According to storage format and the number of samples of multi-path audio-frequency data, from the multi-path audio-frequency data that described mixing stores, extract all segmentation voice datas of a road audio frequency of specifying;
By resampling mode, all segmentation voice datas of a described road audio frequency of specifying are synthesized an audio stream.
2. from multichannel voice frequency, extract the method for a road audio frequency as claimed in claim 1, it is characterized in that, the described storage format according to multi-path audio-frequency data and number of samples, extract all segmentation voice datas of a road audio frequency of specifying from the multi-path audio-frequency data that described mixing stores before, also comprise step:
The storage format of described multi-path audio-frequency data is determined by the described corresponding relation with the sound channel layout of the video file of multichannel voice frequency and the value of channel number and storage format.
3. from multichannel voice frequency, extract as claimed in claim 2 the method for a road audio frequency, it is characterized in that, the value of the sound channel layout of described multi-path audio-frequency data, channel number and number of samples, from described have the source data of the video file of multichannel voice frequency obtain.
4. from multichannel voice frequency, extract the method for a road audio frequency as claimed in claim 2, it is characterized in that, when the described video file with multichannel voice frequency is WMV form, the value of the sound channel layout of the video file of this multichannel voice frequency is taken as 3.
5. the method extracting a road audio frequency from multichannel voice frequency as described in any one of Claims 1-4, is characterized in that, a described road audio frequency of specifying is the audio frequency of appointed language.
6. from multichannel voice frequency, extract the method for a road audio frequency as claimed in claim 5, it is characterized in that, extract all segmentation voice datas of the audio frequency of appointed language in the multi-path audio-frequency data stored from described mixing before, also comprise step:
According to the described video file format with multichannel voice frequency, from described, there is the language message obtaining each road audio frequency the information header of the video file of multichannel voice frequency;
According to the language message of each road audio frequency obtained, determine the voice data Shi Na road audio frequency of appointed language.
7. from multichannel voice frequency, extract a device for a road audio frequency, it is characterized in that, comprising:
Video decapsulation module, reception has the video file of multichannel voice frequency and carries out decapsulation to it, obtains the multi-path audio-frequency data of mixing storage and exports;
Audio parsing data extraction module, for according to the storage format of multi-path audio-frequency data and number of samples, extracts all segmentation voice datas of a road audio frequency of specifying the multi-path audio-frequency data that the mixing exported from described video decapsulation module stores;
Synthesis module, all segmentation voice datas for the road audio frequency of specifying described audio parsing data extraction module obtained by resampling mode synthesize an audio stream.
8. from multichannel voice frequency, extract the device of a road audio frequency as claimed in claim 7, it is characterized in that, also comprise:
Audio storage form acquisition module, for from the described value with sound channel layout, channel number and the number of samples obtaining described multi-path audio-frequency data in the source data of the video file of multichannel voice frequency, and the corresponding relation described in passing through with the sound channel of the video file of multichannel voice frequency and the value of channel number and storage format determines the storage format of described multi-path audio-frequency data, and the storage format of multi-path audio-frequency data and number of samples are sent to described audio parsing data extraction module.
9. from multichannel voice frequency, extract the device of a road audio frequency as claimed in claim 8, it is characterized in that, the value of the sound channel of the video file of described multichannel voice frequency, when the described video file with multichannel voice frequency is WMV form, is taken as 3 by described audio storage form acquisition module.
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Application publication date: 20150722 |