CN108377415A - A kind of determination method and device of video frame rate - Google Patents
A kind of determination method and device of video frame rate Download PDFInfo
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- CN108377415A CN108377415A CN201810142326.6A CN201810142326A CN108377415A CN 108377415 A CN108377415 A CN 108377415A CN 201810142326 A CN201810142326 A CN 201810142326A CN 108377415 A CN108377415 A CN 108377415A
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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
- H04N21/439—Processing of audio elementary streams
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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
- H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
- H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
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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 or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440281—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping
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Abstract
The embodiment of the invention discloses a kind of video frame rates to determine method and device.This method includes：During multimedia, the audio frequency parameter of the multimedia code stream sound intermediate frequency is obtained with predeterminated frequency；The video frame rate of video in the multimedia is determined according to the audio frequency parameter.In this manner, the video frame rate of video is determined by the audio frequency parameter of audio in multimedia, is contributed to during solving multimedia, the nonsynchronous technical problem of audio and video.
Description
Technical field
The present invention relates to multimedia data processing field more particularly to the determination methods and dress of a kind of video frame rate
It sets.
Background technology
With the development of computer technology, the application of multimedia technology is more and more common, existing video in usual multimedia
There are audio, such as monitor video again, i.e. video recording equipment recorded video and audio simultaneously during monitoring of a recorded programme video, video
With video frame rate, audio has audio frequency parameter, and in the playing process of monitor video, video is broadcast according to video frame rate
It puts, audio is played according to audio frequency parameter, and video frame rate and audio frequency parameter fill in multimedia code stream, is referred to as sound
Bright frame per second.
In actual mechanical process, since current playback equipment type is more complicated, multimedia is played in playback equipment
During, often there is the actual frame per second of the video or audio situation different with frame per second is stated.For example, video in statement frame per second
Frame per second is 15fps, but by influences such as the performance of video recording equipment, hardware errors, the video frame rate of actual acquisition is less than statement
Video frame rate in frame per second.Therefore, in multimedia playing process, video and the nonsynchronous situation of audio are susceptible to.
Invention content
The present invention provides a kind of determination method and device of video frame rate, to solve to broadcast multimedia in the prior art
During putting, it is susceptible to video and the nonsynchronous technical problem of audio.
First aspect present invention provides a kind of determination method of video frame rate, and this method includes：In multimedia process
In, the audio frequency parameter of the multimedia code stream sound intermediate frequency is obtained with predeterminated frequency；It is determined according to the audio frequency parameter described more
The video frame rate of video in media.
Optionally, the video frame rate of video in the multimedia is determined according to the audio frequency parameter, including：According to the sound
Frequency parameter determines the video frame rate correction value of the video；Initial video frame per second is repaiied according to the video frame rate correction value
Just, the video frame rate is obtained；Wherein, the initial video frame per second is preset, is carried in the multimedia code stream
Video frame rate.
Optionally, the video frame rate correction value of the video is determined according to the audio frequency parameter, including：
Determine the video frame number that the code stream is included in preset time；
Determine the playing duration of code stream audio in the preset time；
The video frame rate correction value is determined according to the playing duration of the video frame number and the audio.
Optionally, if in the audio frequency parameter including audio sample rate, it is determined that the code stream is in the preset time
The playing duration of audio, including：
Audio sample point number of the code stream in the preset time is determined according to the type of coding of the audio；Institute
It is the discrete point acquired from the corresponding waveform of the audio to state audio sample point；
Determine the first ratio between the audio sample point number and the sample frequency, first ratio is described
Playing duration；Wherein, the sample frequency is used to indicate the rate for acquiring the audio sample point.
Optionally, the video frame rate correction value is the ratio of the video frame number and the playing duration of the audio.
Second aspect of the present invention provides a kind of determining device of video frame rate, including：
Acquiring unit, for during multimedia, the multimedia code stream sound intermediate frequency to be obtained with predeterminated frequency
Audio frequency parameter；
Processing unit, the video frame rate for determining video in the multimedia part according to the audio frequency parameter.
Optionally, the processing unit is specifically used for：
The video frame rate correction value of the video is determined according to the audio frequency parameter；
Initial video frame per second is modified according to the video frame rate correction value, obtains the video frame rate；Wherein, institute
It is video frame rate that is preset, being carried in the multimedia code stream to state initial video frame per second.
Optionally, the processing unit is specifically used for：
Determine the video frame number that the code stream is included in preset time；
Determine the playing duration of code stream audio in the preset time；
The video frame rate correction value is determined according to the playing duration of the video frame number and the audio.
Optionally, if including audio sample rate in the audio frequency parameter, the processing unit is specifically used for：
Audio sample point number of the code stream in the preset time is determined according to the type of coding of the audio；Institute
It is the discrete point acquired from the corresponding waveform of the audio to state audio sample point；
Determine the first ratio between the audio sample point number and the sample frequency, first ratio is described
Playing duration；Wherein, the sample frequency is used to indicate the rate for acquiring the audio sample point.
Optionally, the video frame rate correction value is the ratio of the video frame number and the playing duration of the audio.
Third aspect present invention provides a kind of determining device of video frame rate, including：Processor and memory；
The memory is for storing computer executed instructions, when the processor executes described instruction, makes described regard
The video frame rate that the determining device of frequency frame per second executes as first aspect present invention provides determines method.
Fourth aspect present invention provides a kind of computer readable storage medium, and the computer readable storage medium includes referring to
It enables, when described instruction is run on computers so that the computer executes the video frame provided such as first aspect present invention
Rate determines method.
Technical solution in the embodiment of the present invention has the advantages that：
In technical solution provided in an embodiment of the present invention, during multimedia, obtained with predeterminated frequency described in
The audio frequency parameter of multimedia code stream sound intermediate frequency；The video frame rate of video in the multimedia is determined according to the audio frequency parameter.
Therefore, in embodiments of the present invention, the video frame rate of video in multimedia is determined according to the audio frequency parameter of multimedia sound intermediate frequency, i.e.,
The size of video frame rate is determined by audio frequency parameter, is contributed to during solving multimedia, video, audio are nonsynchronous to ask
Topic.
Description of the drawings
Fig. 1 is a kind of flow chart of the determination method of video frame rate in one embodiment of the invention；
Fig. 2 is a kind of structure chart of the determining device of video frame rate in one embodiment of the invention；
Fig. 3 is a kind of structure chart of the determining device of video frame rate in one embodiment of the invention.
Specific implementation mode
The present invention provides a kind of determination method and device of video frame rate, to solve to broadcast multimedia in the prior art
During putting, it is susceptible to video and the nonsynchronous technical problem of audio.
Since current playback equipment type is more complicated, during playback equipment plays multimedia, often occur
The actual frame per second of the video or audio situation different with statement frame per second.For example, video frame rate is 15fps in statement frame per second, still
By influences such as the performance of playback equipment, hardware errors, actual video frame rate is less than the video frame rate in statement frame per second.Cause
This is susceptible to video and the nonsynchronous situation of audio in multimedia playing process.
In order to solve this technical problem, the general thought of technical solution provided in an embodiment of the present invention is as follows：
In technical solution provided in an embodiment of the present invention, during multimedia, obtained with predeterminated frequency described in
The audio frequency parameter of multimedia code stream sound intermediate frequency；The video frame rate of video in the multimedia is determined according to the audio frequency parameter.
Therefore, in embodiments of the present invention, the video frame rate of video in multimedia is determined according to the audio frequency parameter of multimedia sound intermediate frequency, i.e.,
The size of video frame rate is determined by audio frequency parameter, is contributed to during solving multimedia, video, audio are nonsynchronous to ask
Topic.
In order to be better understood by above-mentioned technical proposal, below by attached drawing and specific embodiment to technical solution of the present invention
It is described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to technical solution of the present invention
Detailed description, rather than to the restriction of technical solution of the present invention, in the absence of conflict, the embodiment of the present invention and implementation
Technical characteristic in example can be combined with each other.
Fig. 1 shows a kind of flow chart of the determination method of video frame rate provided in an embodiment of the present invention, and this method can be with
Suitable for multimedia playback equipment, such as mobile phone, IPAD, television set, laptop etc..As shown in Figure 1, this method packet
It includes：
Step 101：In multimedia playing process, the multimedia code stream sound intermediate frequency is obtained in predeterminated frequency
Audio frequency parameter.
Step 102：The video frame rate of video in the multimedia is determined according to the audio frequency parameter.
Optionally, the multimedia in step 101 can be stored in the multimedia file of playback equipment local, can also be remote
Journey file, for example, remote-recording video playback (telefile stream), can also be the multimedia that network plays online, such as video flowing
Etc., the embodiment of the present invention does not limit this specifically.
Optionally, in step 101, predeterminated frequency can be customized, such as predeterminated frequency can be that every 2s obtains one
Secondary audio program parameter can also be to obtain audio frequency parameter etc. in every 1 second.
Optionally, in step 101, multimedia can be separated into multiple and different sections, such as multimedia by playback equipment
Total playing duration be 1 minute, can be by divided multimedia at 30 sections, each section is the segment of duration 2s, then
With the audio frequency parameter of such as 2 milliseconds acquisition audios of predeterminated frequency in each section, different section predeterminated frequencies can be identical
Or it is different.
Optionally, in a step 101, the audio frequency parameter of audio can be in the statement frame per second carried in multimedia code stream
Audio frequency parameter, in audio frequency parameter comprising a kind of in audio encoding type, audio sample rate, audio sample depth, channel number or
It is a variety of.In introduction below by audio frequency parameter be audio using being illustrated for rate.
Optionally, in actual mechanical process, step 101 can start to play the multimedia moment in playback equipment and hold
Row, can also execute after multimedia certain time, for example, playback equipment detects the current reproduction time of multimedia
Point is 00：30, playback equipment can carry out subregion, such as 00 to the remaining multimedia not played：30-00:Point between 40
The audio frequency parameter of audio is obtained in area with predeterminated frequency.
According to foregoing teachings：If existing audio also has video in multimedia, the statement in the multimedia code stream
Existing audio frequency parameter also has video frame rate in frame per second.In general, the performance of audio frequency parameter in statement frame per second by playback equipment
It influences smaller, can be neglected, and state video frame rate in frame per second and be affected by the performance of playback equipment.So
The audio frequency parameter obtained in step 101 is accurate, further can determine video frame rate, i.e. step according to audio frequency parameter
102。
Optionally, in step 102, playback equipment determines the process of the video frame rate of video in multimedia according to audio frequency parameter
It can be carried out in two steps, the first step, playback equipment determines the video frame rate correction value of video according to audio frequency parameter；Second step, root
Initial video frame per second is modified according to the video frame rate correction value, obtains the video frame rate；Here initial video frame
Rate is video frame rate that is preset, being carried in the multimedia code stream, i.e. initial video frame per second is statement frame per second above-mentioned
In video frame rate.I.e. playback equipment determines video frame rate correction value according to audio frequency parameter, then according to video frame rate correction value
It modifies to the video frame rate in statement frame per second, obtains accurate video frame rate.
Optionally, in the first step, playback equipment determines the mode of the video frame rate correction value of video according to audio frequency parameter
Can determine code stream video frame number included in video in preset time；Determine audio of the code stream in preset time
Playing duration；The video frame rate correction value is determined according to the playing duration of the video frame number and the audio.
As described previously, multimedia can be separated into multiple and different sections by playback equipment, and playback equipment can be true
The video frame number for including in a fixed multimedia section, i.e. preset time are that multimedia is divided into each area behind different sections
Between reproduction time, certain preset time can also be other times made by oneself.Detailed process is that playback equipment determines multimedia
Video in include video frame number, and determine audio playing duration, then determine video frame number and audio playing duration
Ratio, which is video frame rate correction value.For example, video frame number is indicated with videoframe, video frame rate correction value
It is indicated with framerate, the playing duration of audio is time, then formula 1：Framerate=videoframe/time.
Optionally, video frame number is typically to generate the quantity of the image used when video, so video frame number is regarded in making
It can be recorded when frequency, i.e. videoframe in formula 1.A kind of determination side of the time in formula 1 is described below
Formula.
As an example, determine that the mode of the reproduction time of audio is：Determine the audio sample point number of the audio；
The audio sample point is the discrete point acquired from the corresponding waveform of the audio；It determines the audio sample point number and adopts
The first ratio between sample frequency, first ratio are the playing duration；Wherein, the sample frequency is used to indicate acquisition
The rate of the audio sample point.
It should be noted that playback equipment is when playing multimedia, the broadcasting to audio be to original acoustic waveform into
Row sampling obtains audio sample point, then audio sample point is converted into binary data and reproduces original sound.In practical operation
Cheng Zhong, the more reduction degrees to original sound of audio sample point are higher, and audio sampling frequency is that the audio obtained the unit interval is adopted
The quantity of sampling point, the higher reduction degree to sound of audio sampling frequency is higher, and the size of audio sample rate is by playback equipment
The performance of audio collection card determines that the audio sampling frequency of different capture cards is different, and playback equipment can record audio sample
The value of frequency.Playback equipment obtains after audio sample point number and audio sample rate, it may be determined that audio sample point number
Ratio between sample frequency, the i.e. playing duration of audio.For example, audio sample point number is indicated with AudioSample,
Sample frequency is indicated with AudioSampleRate, obtains formula 2：Time=AudioSample/AudioSampleRate.
Therefore the formula 2 is combined with above-mentioned formula 1, you can obtain the determination formula of video frame rate correction value, i.e.,
FrameRate=videoFrame/ (AudioSample/AudioSampleRate) can after obtaining the correction value of video frame rate
To execute second step, i.e., initial video frame per second is modified according to the video frame rate correction value.
By taking multimedia is film as an example, in general, a frame audio is corresponding with per frame image in film, in the broadcasting of film
While Cheng Zhong, I frame image are playd in order according to certain sequence, audio corresponding with every frame image in I frame images is also successively
It plays, when a certain frame image audio sync corresponding with the frame image plays, the best results of presentation.Therefore, playback equipment
It after obtaining the video frame rate correction value of video, can be played out according to video frame rate correction value, audio is joined according to corresponding audio
Number plays out, you can to achieve the effect that be played simultaneously.
Optionally, in actual mechanical process, if audio can determine audio sample by coding according to coded format
Number.Whether audio is encoded, determine that the mode of audio sample point number is different, and the coded format of audio is different, determines
The mode of audio sample number also differs.If such as audio does not encode, audio sample number=audio data length (list
Position byte) * 8/ sampling depth, coded format is that G711A or G711U is encoded, then audio sample number=audio data length is (single
Position byte).Wherein, a byte corresponds to 8bit.If coded format encodes for AAC, adts synchronous head numbers can be checked,
Audio sample number=synchronous head number * 1024.
By above description it is found that in technical solution provided in an embodiment of the present invention, during multimedia,
The audio frequency parameter of the multimedia code stream sound intermediate frequency is obtained with predeterminated frequency；The multimedia is determined according to the audio frequency parameter
The video frame rate of middle video.Therefore, in embodiments of the present invention, determined in multimedia according to the audio frequency parameter of multimedia sound intermediate frequency
The size of the video frame rate of video, i.e. video frame rate is determined by audio frequency parameter, is contributed to during solving multimedia, depending on
Frequently, the nonsynchronous problem of audio.
Second aspect of the embodiment of the present invention provides a kind of determining device of video frame rate, which can be multimedia
Equipment, such as mobile phone, IPAD, television set, laptop etc..It is one kind provided in an embodiment of the present invention shown in please referring to Fig.2
The structure chart of the determining device of video frame rate.The determining device 200 of video frame rate includes：Acquiring unit 201 and processing unit
202。
Acquiring unit 201, for during multimedia, the multimedia code stream middle pitch to be obtained with predeterminated frequency
The audio frequency parameter of frequency；
Processing unit 202, the video frame rate for determining video in the multimedia part according to the audio frequency parameter.
Optionally, processing unit 202 is specifically used for：
The video frame rate correction value of the video is determined according to the audio frequency parameter；
Initial video frame per second is modified according to the video frame rate correction value, obtains the video frame rate；Wherein, institute
It is video frame rate that is preset, being carried in the multimedia code stream to state initial video frame per second.
Optionally, processing unit 202 is specifically used for：
Determine the video frame number that the code stream is included in preset time；
Determine the playing duration of code stream audio in the preset time；
The video frame rate correction value is determined according to the playing duration of the video frame number and the audio.
Optionally, if including audio sample rate in the audio frequency parameter, processing unit 202 is specifically used for：
Audio sample point number of the code stream in the preset time is determined according to the type of coding of the audio；Institute
It is the discrete point acquired from the corresponding waveform of the audio to state audio sample point；
Determine the first ratio between the audio sample point number and the sample frequency, first ratio is described
Playing duration；Wherein, the sample frequency is used to indicate the rate for acquiring the audio sample point.
Optionally, the video frame rate correction value is the ratio of the video frame number and the playing duration of the audio.
Since the determining device of video frame rate shown in Fig. 2 and the determination method of aforementioned video frame rate shown in FIG. 1 are bases
Invention under same design, by aforementioned to the determination method of video frame rate and its detailed description of version, this field
Technical staff can be apparent from the implementation process of the determining device of video frame rate in the present embodiment, so in order to illustrate book
Succinctly, details are not described herein.
Third aspect present invention provides a kind of determining device of video frame rate, please refer to Fig.3 shown in, be the embodiment of the present invention
A kind of structure chart of the determining device of the video frame rate provided.The determining device 300 of video frame rate includes：Memory 301 and place
Manage device 302, wherein memory 301 is stored with the instruction that can be executed by processor 302, and processor 302 is by executing memory
The instruction of 301 storages, executes the determination method of the video frame rate provided such as first aspect of the embodiment of the present invention.
Optionally, processor 302 can be general central processing unit (CPU) or application-specific integrated circuit (English：
Application Specific Integrated Circuit, referred to as：ASIC), can be that one or more is used to control journey
The integrated circuit that sequence executes can be use site programmable gate array (English：FieldProgrammable Gate
Array, referred to as：FPGA) the hardware circuit developed, can be baseband processor.
Optionally, memory 301 may include read-only memory (English：Read Only Memory, referred to as：ROM), with
Machine accesses memory (English：Random Access Memory, referred to as：RAM one or more) and in magnetic disk storage.It deposits
Reservoir 301 is used to store data and/or instruction required when processor 302 is run.The quantity of memory 301 can be one or
It is multiple.
Since the determining device of video frame rate shown in Fig. 3 and the determination method of aforementioned video frame rate shown in FIG. 1 are bases
Invention under same design, by aforementioned to the determination method of video frame rate and its detailed description of version, this field
Technical staff can be apparent from the implementation process of the determining device of video frame rate in the present embodiment, so in order to illustrate book
Succinctly, details are not described herein.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, the application can be used in one or more wherein include computer usable program code computer
The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The application is with reference to method, the flow of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (12)
1. a kind of determination method of video frame rate, which is characterized in that including：
During multimedia, the audio frequency parameter of the multimedia code stream sound intermediate frequency is obtained with predeterminated frequency；
The video frame rate of video in the multimedia is determined according to the audio frequency parameter.
2. the method as described in claim 1, which is characterized in that determine video in the multimedia according to the audio frequency parameter
Video frame rate, including：The video frame rate correction value of the video is determined according to the audio frequency parameter；
Initial video frame per second is modified according to the video frame rate correction value, obtains the video frame rate；Wherein, described first
Beginning video frame rate is video frame rate that is preset, being carried in the multimedia code stream.
3. method as claimed in claim 2, which is characterized in that determine the video frame rate of the video according to the audio frequency parameter
Correction value, including：
Determine the video frame number that the code stream is included in preset time；
Determine the playing duration of code stream audio in the preset time；
The video frame rate correction value is determined according to the playing duration of the video frame number and the audio.
4. method as claimed in claim 3, which is characterized in that if in the audio frequency parameter including audio sample rate, it is determined that
The playing duration of code stream audio in the preset time, including：
Audio sample point number of the code stream in the preset time is determined according to the type of coding of the audio；The sound
Frequency sampling point is the discrete point acquired from the corresponding waveform of the audio；
Determine that the first ratio between the audio sample point number and the sample frequency, first ratio are the broadcasting
Duration；Wherein, the sample frequency is used to indicate the rate for acquiring the audio sample point.
5. method as claimed in claim 3, which is characterized in that the video frame rate correction value be the video frame number with it is described
The ratio of the playing duration of audio.
6. a kind of determining device of video frame rate, which is characterized in that including：
Acquiring unit, for during multimedia, the sound of the multimedia code stream sound intermediate frequency to be obtained with predeterminated frequency
Frequency parameter；
Processing unit, the video frame rate for determining video in the multimedia part according to the audio frequency parameter.
7. device as claimed in claim 6, which is characterized in that the processing unit is specifically used for：
The video frame rate correction value of the video is determined according to the audio frequency parameter；
Initial video frame per second is modified according to the video frame rate correction value, obtains the video frame rate；Wherein, described first
Beginning video frame rate is video frame rate that is preset, being carried in the multimedia code stream.
8. device as claimed in claim 7, which is characterized in that the processing unit is specifically used for：
Determine the video frame number that the code stream is included in preset time；
Determine the playing duration of code stream audio in the preset time；
The video frame rate correction value is determined according to the playing duration of the video frame number and the audio.
9. device as claimed in claim 8, which is characterized in that described if in the audio frequency parameter including audio sample rate
Processing unit is specifically used for：
Audio sample point number of the code stream in the preset time is determined according to the type of coding of the audio；The sound
Frequency sampling point is the discrete point acquired from the corresponding waveform of the audio；
Determine that the first ratio between the audio sample point number and the sample frequency, first ratio are the broadcasting
Duration；Wherein, the sample frequency is used to indicate the rate for acquiring the audio sample point.
10. device as claimed in claim 8, which is characterized in that the video frame rate correction value is the video frame number and institute
State the ratio of the playing duration of audio.
11. a kind of determining device of video frame rate, which is characterized in that including：Processor and memory；
The memory, when the processor executes described instruction, makes the video frame for storing computer executed instructions
The determining device of rate executes method as described in any one in claim 1-5.
12. a kind of computer readable storage medium, which is characterized in that the computer readable storage medium includes instruction, works as institute
Instruction is stated when running on computers so that the computer executes method as described in any one in claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810142326.6A CN108377415A (en) | 2018-02-11 | 2018-02-11 | A kind of determination method and device of video frame rate |
Applications Claiming Priority (1)
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