CN114222160A - Video scene page switching method and device - Google Patents
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- CN114222160A CN114222160A CN202111528865.1A CN202111528865A CN114222160A CN 114222160 A CN114222160 A CN 114222160A CN 202111528865 A CN202111528865 A CN 202111528865A CN 114222160 A CN114222160 A CN 114222160A
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- 230000033764 rhythmic process Effects 0.000 claims abstract description 111
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 6
- 238000005070 sampling Methods 0.000 claims description 38
- 238000004590 computer program Methods 0.000 claims description 13
- 230000001174 ascending effect Effects 0.000 claims description 8
- 238000007781 pre-processing Methods 0.000 claims description 7
- 238000012163 sequencing technique Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000003786 synthesis reaction Methods 0.000 claims description 4
- 238000010606 normalization Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/233—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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
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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
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
- H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
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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
- H04N21/4394—Processing of audio elementary streams involving operations for analysing the audio stream, e.g. detecting features or characteristics in audio 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
- H04N21/44—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
- H04N21/44016—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 splicing one content stream with another content stream, e.g. for substituting a video clip
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- Engineering & Computer Science (AREA)
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Abstract
The invention provides a video scene page switching method and a video scene page switching device, wherein the method comprises the following steps: s10: reading background music data and the number of scene pages; s20: acquiring a plurality of rhythm point coefficients of background music; s30: and calculating the time length between every two rhythm point coefficients, adjusting the time length of each scene page according to the time length, and synthesizing the video. In the embodiment, the rhythm of background music is automatically identified and is combined with the number of scene pages, and the time length of the scene pages is automatically adjusted, so that the effect of switching the scene pages along with the rhythm of the music is realized; compared with the low efficiency and the complexity of adjusting the scene page length by manually and repeatedly listening to background music, the method is faster and more accurate, and the video production time cost is greatly reduced.
Description
Technical Field
The invention relates to the technical field of short video production, in particular to a method and a device for switching video scene pages.
Background
In the current video synthesis scheme, the video synthesis method is usually formed by splicing individual scene pages, and in most cases, the length of the scene pages often has strong correlation with the rhythm of background music. The existing method for adjusting the length of the scene page according to the background music only can be to manually and repeatedly listen to the background music to find out the turning point of the rhythm, and then adjust the length of the scene page according to the turning point.
Disclosure of Invention
In order to solve the above technical problem, a first aspect of the present invention provides a video scene page switching method, where the method includes:
s10: reading background music data and the number of scene pages;
s20: acquiring a plurality of rhythm point coefficients of background music;
s30: and calculating the time length between every two rhythm point coefficients, adjusting the time length of each scene page according to the time length, and synthesizing the video.
Preferably, the number of rhythm point coefficients is one more than the number of scene pages.
Preferably, the method of obtaining the rhythm point coefficient of the background music comprises:
s200: preprocessing the background music;
s201: forming first rhythm data, wherein the first rhythm data is a sequence of rhythm point coefficient pairs sampling time points;
s202: comparing the number of the rhythm point coefficients with the number of the scene pages, if the number of the rhythm point coefficients is more than the number of the scene pages, executing the step S203, and if the number of the rhythm point coefficients is less than or equal to the number of the scene pages, re-executing the step S201;
s203: arranging the first rhythm data in a descending order according to rhythm point coefficients;
s204: selecting rhythm point coefficients and corresponding sampling time points according to the required quantity sequence to form second rhythm data;
s205: and arranging the second rhythm data in an ascending order according to the sampling time points.
Preferably, step S201 includes:
s201-1: frequency sampling is carried out on background music at fixed time intervals;
s201-2: and calculating the absolute value of the difference value of the frequencies between every two sampling time points, and performing normalization processing to form a uniform numerical value from 0 to 10, wherein the numerical value is called a rhythm point coefficient.
Preferably, before the step S20, the method further includes a step S10-1: and cutting the background music to ensure that the time length of the background music is equal to the time length of the video.
The second aspect of the present invention provides a video scene page switching apparatus, comprising:
the reading module is used for reading the background music data and the number of scene pages;
the acquisition module is used for acquiring a plurality of rhythm point coefficients of background music;
and the synthesis module is used for calculating the time length between every two rhythm point coefficients, adjusting the time length of each scene page according to the time length and synthesizing the video.
Preferably, the obtaining module includes:
the processing unit is used for preprocessing the background music;
the sampling unit is used for forming first rhythm data, and the first rhythm data is a sequence of rhythm point coefficients to sampling time points;
a comparison unit for comparing the number of the rhythm point coefficients with the number of the scene pages, executing step S203 if the number of the rhythm point coefficients is larger than the number of the scene pages, and re-executing step S201 if the number of the rhythm point coefficients is smaller than or equal to the number of the scene pages;
the first sequencing unit is used for sequencing the first rhythm data in a descending order according to the rhythm point coefficient;
the selecting unit is used for selecting the rhythm point coefficients and the corresponding sampling time points according to the required quantity sequence to form second rhythm data;
a second sorting unit; and arranging the second rhythm data in an ascending order according to the sampling time points.
Preferably, the music editing device further comprises a cropping module for cropping the background music so that the time length of the background music is equal to the time length of the video.
A third aspect of the invention provides an electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that the computer program is adapted to perform the method of any of claims 1-5 in the processor.
A fourth aspect of the invention provides a storage medium storing a computer program, characterized in that the computer program is executed in a processor to implement the method of any of claims 1-5.
The invention has the advantages and positive effects that: the rhythm of background music is automatically identified and is combined with the number of scene pages, and the time length of the scene pages is automatically adjusted, so that the effect of switching the scene pages along with the music rhythm is realized; compared with the low efficiency and the complexity of adjusting the scene page length by manually and repeatedly listening to background music, the method is faster and more accurate, and the video production time cost is greatly reduced.
In this embodiment, by using a simple sorting algorithm, the rhythm point coefficients and the corresponding data of the sampling time points are sorted from large to small according to the rhythm point coefficients, the data with the most rhythm conversion characteristics is selected, and then the selected data is sorted from small to large according to the sampling time points of the music, so that the lengths of every two adjacent time points can be calculated, and the time length of the corresponding scene page can be obtained.
Drawings
FIG. 1 is a flow chart of a video scene page switching method according to an embodiment of the present invention;
fig. 2 is a flowchart of a method of acquiring a tempo point coefficient of background music according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a video scene page switching apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an acquisition module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that in the description of the present invention, unless otherwise explicitly specified or limited, the term "storage medium" may be various media that can store a computer program, such as ROM, RAM, a magnetic or optical disk, or the like. The term "processor" may be a chip or a circuit having a data Processing function, such as a CPLD (Complex Programmable Logic Device), an FPGA (Field-Programmable Gate Array), an MCU (micro Controller Unit), a PLC (Programmable Logic Controller), and a CPU (Central Processing Unit). The term "electronic device" may be any device having data processing and storage functions and may generally include fixed and mobile terminals. Fixed terminals such as desktop computers and the like. Mobile terminals such as mobile phones, PADs, and mobile robots, etc. Furthermore, the technical features mentioned in the different embodiments of the invention described later can be combined with each other as long as they do not conflict with each other.
For a better understanding of the present invention, reference is made to the following detailed description and accompanying drawings that illustrate the invention.
Fig. 1 shows a flowchart of a video scene page switching method according to an embodiment of the present invention, as shown in fig. 1: the method comprises the following steps:
s10: reading background music data and the number of scene pages;
s20: acquiring a plurality of rhythm point coefficients of background music;
s30: and calculating the time length between every two rhythm point coefficients, and adjusting the time length of each scene page according to the time length.
Wherein the number of the rhythm point coefficients is one more than the number of the scene pages.
The draft data of the work generally includes scene page data, background music data, duration data of the video work, and the like, and the time point of each scene page switching is generally related to the tempo in the background music data, for example, the time point of the scene page switching is generally a turning point of the tempo. In this embodiment, the change of the background music tempo is represented by the tempo point coefficient.
In the embodiment, the rhythm of background music is automatically identified and is combined with the number of scene pages, and the time length of the scene pages is automatically adjusted, so that the effect of switching the scene pages along with the rhythm of the music is realized; compared with the low efficiency and the complexity of adjusting the scene page length by manually and repeatedly listening to background music, the method is faster and more accurate, and the video production time cost is greatly reduced.
Fig. 2 shows a flowchart of a method of acquiring a tempo point coefficient of background music according to an embodiment of the present invention, which includes the following steps, as shown in fig. 2.
S200: and preprocessing the background music.
In this step, the preprocessing of the background music includes, for example, removing noise and fixed frequency drumbeats in the background music. The rhythm point is, for example, a beat point in the background music, such as a drum point, and the like, and the time point of scene page transition is usually a time point at which the intensity of the rhythm is turned. Therefore, the drumhead with fixed frequency is removed to avoid the interference of subsequent sampling of the background music.
S201: and forming first rhythm data, wherein the first rhythm data is a sequence of rhythm point coefficient pairs of sampling time points.
In the step, frequency sampling is performed on background music at fixed time intervals, the absolute value of the difference value of the frequency between every two sampling time points is calculated, normalization processing is performed, a uniform numerical value from 0 to 10 is formed, and the numerical value is called as a rhythm point coefficient.
In one particular embodiment, the background music is frequency sampled, for example, at 200 ms. It is understood that, the time interval of sampling may be set as required by those skilled in the art, and the present embodiment does not limit this.
In this embodiment, only the frequency variation dimension of the background music is identified, and in other embodiments, a certain weighting calculation may be performed on the amplitude variation coefficient of the music waveform to serve as another factor for extracting the music tempo point.
S202: comparing the number of the rhythm point coefficients with the number of the scene pages, if the number of the rhythm point coefficients is greater than the number of the scene pages, executing step S203, and if the number of the rhythm point coefficients is less than or equal to the number of the scene pages, re-executing step S201.
When step S201 is executed again, the time interval of sampling is adjusted.
S203: and arranging the first rhythm data in a descending order according to the rhythm point coefficient.
S204: and selecting the rhythm point coefficients and the corresponding sampling time points according to the required quantity sequence to form second rhythm data.
In this step, the draft data of the work includes, for example, N scene pages, for example, the first N +1 rhythm point coefficients and the corresponding sampling time points are selected.
S205: and arranging the second rhythm data in an ascending order according to the sampling time points.
In a specific embodiment, the second cadence data is sorted in ascending order according to sampling time points as shown in table 1.
Table 1 the second cadence data is arranged in ascending order according to sampling time points.
| Sampling time point | Coefficient of rhythm |
| 01:11.2 | 50.0938 |
| 02:20.6 | 4089343 |
| 02:50.0 | 8.83746 |
| 03:21.2 | 6.02746 |
| 04:00.4 | 7.83446 |
| 04:30.8 | 4.01746 |
| 04:58.2 | 8.11703 |
| 05:10.2 | 4.34755 |
In step S30, for example, if the draft data of the composition includes 7 scene pages, i.e., scene page 1, scene page 2, scene page … …, and scene page 7, respectively, the rhythm points of the background music that need to be acquired are 8, i.e., rhythm point coefficient 1, rhythm point coefficients 2, … …, and rhythm point coefficient 8 (as shown in table 1).
Wherein the time length between the tempo point coefficient 1 and the tempo point coefficient 2 is T1, the time length between the tempo point coefficient 2 and the tempo point coefficient 3 is T2, … …, and the time length between the tempo point 7 and the tempo point 8 is T7, then the time length of the scene page 1 in the whole video is T1, the time length of the scene page 2 in the whole video is T2, … …, and the time length of the scene page 7 in the whole video is T7, where T1+ T2+ … … + T7= the total video duration.
Further, at step S20: before obtaining the rhythm points of the plurality of pieces of background music, the method further includes step S10-1: the background music is clipped so that its time length is equal to that of the video.
In this embodiment, by using a simple sorting algorithm, the rhythm point coefficients and the corresponding data of the sampling time points are sorted from large to small according to the rhythm point coefficients, the data with the most rhythm conversion characteristics is selected, and then the selected data is sorted from small to large according to the sampling time points of the music, so that the lengths of every two adjacent time points can be calculated, and the time length of the corresponding scene page can be obtained.
FIG. 3 is a schematic diagram of a video scene page switching apparatus according to an embodiment of the present invention; as shown in fig. 3, the apparatus includes:
the reading module is used for reading the background music data and the number of scene pages;
the acquisition module is used for acquiring a plurality of rhythm point coefficients of background music;
and the synthesis module is used for calculating the time length between every two rhythm point coefficients, adjusting the time length of each scene page according to the time length and synthesizing the video.
Fig. 4 shows a schematic structural diagram of an obtaining module according to an embodiment of the present invention, and as shown in fig. 4, the obtaining module includes:
the processing unit is used for preprocessing the background music;
the sampling unit is used for forming first rhythm data, and the first rhythm data is a sequence of rhythm point coefficients to sampling time points;
a comparison unit for comparing the number of the rhythm point coefficients with the number of the scene pages, executing step S203 if the number of the rhythm point coefficients is larger than the number of the scene pages, and re-executing step S201 if the number of the rhythm point coefficients is smaller than or equal to the number of the scene pages;
the first sequencing unit is used for sequencing the first rhythm data in a descending order according to the rhythm point coefficient;
the selecting unit is used for selecting the rhythm point coefficients and the corresponding sampling time points according to the required quantity sequence to form second rhythm data;
a second sorting unit; and arranging the second rhythm data in an ascending order according to the sampling time points.
Further, the video scene page switching apparatus further includes a clipping unit that clips the background music so that a time length of the background music is equal to a time length of the video.
An embodiment of the present invention further provides an electronic device, including a memory and a processor, where the memory stores a computer program, and the computer program is executed in the processor, where the method may be implemented by any one of the methods.
An embodiment of the present invention further provides a storage medium storing a computer program, where the computer program is executed in a processor, and can implement any one of the methods described above.
It should be noted that any of the methods provided in the above embodiments are within the scope of the present invention, and any use or storage of these methods is prohibited without permission.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (10)
1. A video scene page switching method is characterized in that: the method comprises the following steps:
s10: reading background music data and the number of scene pages;
s20: acquiring a plurality of rhythm point coefficients of background music;
s30: and calculating the time length between every two rhythm point coefficients, adjusting the time length of each scene page according to the time length, and synthesizing the video.
2. The video scene page switching method of claim 1, wherein: the number of rhythm point coefficients is one more than the number of scene pages.
3. The video scene page switching method of claim 1, wherein: the method for acquiring the rhythm point coefficient of the background music comprises the following steps:
s200: preprocessing the background music;
s201: forming first rhythm data, wherein the first rhythm data is a sequence of rhythm point coefficient pairs sampling time points;
s202: comparing the number of the rhythm point coefficients with the number of the scene pages, if the number of the rhythm point coefficients is more than the number of the scene pages, executing the step S203, and if the number of the rhythm point coefficients is less than or equal to the number of the scene pages, re-executing the step S201;
s203: arranging the first rhythm data in a descending order according to rhythm point coefficients;
s204: selecting rhythm point coefficients and corresponding sampling time points according to the required quantity sequence to form second rhythm data;
s205: and arranging the second rhythm data in an ascending order according to the sampling time points.
4. The video scene page switching method of claim 3, wherein: step S201 includes:
s201-1: frequency sampling is carried out on background music at fixed time intervals;
s201-2: and calculating the absolute value of the difference value of the frequencies between every two sampling time points, and performing normalization processing to form a uniform numerical value from 0 to 10, wherein the numerical value is called a rhythm point coefficient.
5. The video scene page switching method of claim 1, wherein: before the step S20, a step S10-1 is further included: and cutting the background music to ensure that the time length of the background music is equal to the time length of the video.
6. A video scene page switching apparatus, characterized in that: the device comprises:
the reading module is used for reading the background music data and the number of scene pages;
the acquisition module is used for acquiring a plurality of rhythm point coefficients of background music;
and the synthesis module is used for calculating the time length between every two rhythm point coefficients, adjusting the time length of each scene page according to the time length and synthesizing the video.
7. The video scene page switching apparatus according to claim 6, wherein: the acquisition module includes:
the processing unit is used for preprocessing the background music;
the sampling unit is used for forming first rhythm data, and the first rhythm data is a sequence of rhythm point coefficients to sampling time points;
a comparison unit for comparing the number of the rhythm point coefficients with the number of the scene pages, executing step S203 if the number of the rhythm point coefficients is larger than the number of the scene pages, and re-executing step S201 if the number of the rhythm point coefficients is smaller than or equal to the number of the scene pages;
the first sequencing unit is used for sequencing the first rhythm data in a descending order according to the rhythm point coefficient;
the selecting unit is used for selecting the rhythm point coefficients and the corresponding sampling time points according to the required quantity sequence to form second rhythm data;
a second sorting unit; and arranging the second rhythm data in an ascending order according to the sampling time points.
8. The video scene page switching apparatus according to claim 6, wherein: the system also comprises a cutting module for cutting the background music to ensure that the time length of the background music is equal to the time length of the video.
9. An electronic device comprising a memory and a processor, the memory storing a computer program, wherein the computer program is executed in the processor to perform the method of any of claims 1-5.
10. A storage medium storing a computer program, characterized in that the computer program is executed in a processor to implement the method of any of claims 1-5.
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| CN110933487A (en) * | 2019-12-18 | 2020-03-27 | 北京百度网讯科技有限公司 | Method, device and equipment for generating click video and storage medium |
| CN112685592A (en) * | 2020-12-24 | 2021-04-20 | 上海掌门科技有限公司 | Method and device for generating sports video score |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105142017A (en) * | 2015-08-12 | 2015-12-09 | 北京金山安全软件有限公司 | Picture switching method and picture switching device during picture video playing |
| CN110265057A (en) * | 2019-07-10 | 2019-09-20 | 腾讯科技（深圳）有限公司 | Generate multimedia method and device, electronic equipment, storage medium |
| CN110933487A (en) * | 2019-12-18 | 2020-03-27 | 北京百度网讯科技有限公司 | Method, device and equipment for generating click video and storage medium |
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