CN111432169B - Video transmission method, device, equipment and system - Google Patents
Video transmission method, device, equipment and system Download PDFInfo
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- CN111432169B CN111432169B CN201911357649.8A CN201911357649A CN111432169B CN 111432169 B CN111432169 B CN 111432169B CN 201911357649 A CN201911357649 A CN 201911357649A CN 111432169 B CN111432169 B CN 111432169B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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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
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
- H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
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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
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
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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
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
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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
- H04N21/437—Interfacing the upstream path of the transmission network, e.g. for transmitting client requests to a VOD server
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
The application provides a video transmission method, a video transmission device, video transmission equipment and a video transmission system. The method comprises the following steps: receiving a request for reducing the data transmission quantity from a request end, wherein the request for reducing the data transmission quantity comprises first data quantity information of a first picture received by the request end; and reducing the data volume of a second picture to be sent according to the first data volume information. The method of the embodiment of the application can reduce the pause phenomenon in the video playing process.
Description
Technical Field
The present application relates to the field of video monitoring technologies, and in particular, to a video transmission method, apparatus, device, and system.
Background
In the technical field of video monitoring, a front-end device (video acquisition device) generally acquires videos, and the front-end device can directly send real-time streams of the acquired monitoring videos to a client for playing, or can firstly store the acquired monitoring videos, and when needed, a user can request the client to play back the videos.
Currently, a WEB client generally supports plug-in-free preview, frames are extracted from a code stream and converted into pictures, the pictures are sent to the WEB client through a network, the WEB client directly renders and displays the pictures, and if the network bandwidth is low, playing can be blocked.
Disclosure of Invention
The application provides a video transmission method, a video transmission device, video transmission equipment and a video transmission system, which are used for reducing the pause phenomenon during playing of a monitoring video.
In a first aspect, an embodiment of the present application provides a video transmission method, including:
receiving a request for reducing the data transmission quantity from a request end, wherein the request for reducing the data transmission quantity comprises first data quantity information of a first picture received by the request end;
and reducing the data volume of a second picture to be sent according to the first data volume information.
In a second aspect, an embodiment of the present application provides a video transmission method, including:
receiving a first picture which is sent by a sending end and obtained by frame extraction from a video;
determining whether to send a request for reducing the data transmission amount to the sending end according to the first data amount information of the received first picture, wherein the request for reducing the data transmission amount comprises the first data amount information of the received first picture; the request for reducing the data transmission quantity is used for indicating the sending end to reduce the data quantity of the second picture to be sent.
In a third aspect, an embodiment of the present application provides a video transmission apparatus, including:
the receiving module is used for receiving a request for reducing the data transmission quantity from a request end, wherein the request for reducing the data transmission quantity comprises first data quantity information of a first picture received by the request end;
and the processing module is used for reducing the data volume of the second picture to be sent according to the first data volume information.
In a fourth aspect, an embodiment of the present application provides a video transmission apparatus, including:
the receiving module is used for receiving a first picture which is sent by the sending end and obtained by frame extraction from a video;
the processing module is used for determining whether to send a request for reducing the data transmission quantity to the sending end according to the first data quantity information of the received first picture, wherein the request for reducing the data transmission quantity comprises the first data quantity information of the received first picture; the request for reducing the data transmission quantity is used for indicating the sending end to reduce the data quantity of the picture to be sent;
and the sending module is used for determining to send the request for reducing the data transmission quantity to the sending end at the processing module and sending the request for reducing the data transmission quantity to the sending end.
In a fifth aspect, an embodiment of the present application provides a video transmission system, including:
a sending end device and a requesting end device;
the sending terminal device is used for sending a first picture to the requesting terminal device; receiving the request for reducing the data transmission quantity from the request end equipment; the request for reducing the data transmission quantity comprises first data quantity information of a received first picture;
the sending end device is further configured to reduce the data volume of a second picture to be sent according to the first data volume information;
the request end equipment is used for receiving a first picture sent by the sending end equipment; and sending the request for reducing the data transmission quantity to the sending terminal equipment according to the first data quantity information of the received first picture.
In a sixth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method of any one of the first aspect.
In a seventh aspect, an embodiment of the present application provides an electronic device, including:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the method of any of the first aspects via execution of the executable instructions.
In an eighth aspect, an embodiment of the present application provides an electronic device, including:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the method of any of the second aspects via execution of the executable instructions.
According to the video transmission method, the video transmission device, the video transmission equipment and the video transmission system, a request for reducing data transmission quantity is received from a request end, wherein the request for reducing the data transmission quantity comprises first data quantity information of a first picture received by the request end; according to the scheme, the request end sends a request for reducing the data transmission quantity to the sending end after the playing is determined to be paused, and the sending end reduces the data quantity of the second picture to be sent according to the first data quantity information of the received first picture included in the request, so that the data quantity transmitted through a network is reduced, the playing pause phenomenon is reduced, and the display effect during playing is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is an application scenario diagram provided in an embodiment of the present application;
fig. 2 is a schematic view of a video transmission principle in the related art;
fig. 3 is a schematic flowchart of an embodiment of a video transmission method provided in the present application;
fig. 4 is a schematic flowchart of another embodiment of a video transmission method provided in the present application;
FIG. 5 is an interaction diagram of an embodiment of a video transmission method provided by the present application;
FIG. 6 is a schematic structural diagram of an embodiment of a video transmission apparatus provided in the present application;
fig. 7 is a schematic structural diagram of another embodiment of a video transmission apparatus provided in the present application;
FIG. 8 is a schematic structural diagram of an embodiment of an electronic device provided in the present application;
fig. 9 is a schematic structural diagram of another embodiment of an electronic device provided in the present application.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the drawings described herein are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Before describing the method provided by the present application, an application scenario of the embodiment of the present application is first described with reference to fig. 1. Fig. 1 is an application scenario architecture diagram provided in the embodiment of the present application. Optionally, as shown in fig. 1, the application scenario includes an electronic device 11, a collection device 12, and a server 13; the electronic device 11 may be, for example, a playback device or a device for receiving processed pictures (played back by other playback devices), where the playback device includes, for example: electronic equipment such as a computer, a tablet computer, a mobile phone and the like, the playing device may play a surveillance video through a WEB end, and the collecting device 12 may include, for example, a surveillance camera, a snapshot machine and the like, and is used to collect video data.
The electronic device 11, the capture device 12, the video capture device 12 and the server 13 may be connected via a network.
Alternatively, in other scenarios, the acquisition device may directly communicate with the electronic device, that is, the acquisition device and the server may be integrated together, which is not limited in this application.
The method provided by the embodiment of the application is applied to video monitoring, for example, the amount of transmitted data is reduced in order to meet the requirement of low bandwidth in the video transmission process, so that the pause phenomenon played in the low bandwidth is reduced.
The server may be provided with a stream to image (STG), which is a browser service program for converting various types of code stream data into pictures. The playing device can play videos through a WEB client, for example, and can directly play pictures without a plug-in.
As shown in fig. 2, when playing a video, data transmitted in a network is mainly pictures, if a network bandwidth is insufficient, time consumed in a picture transmission process may affect the number of pictures received by a playing device per second, and if the number of pictures received per second is insufficient, a video playing at the playing device may cause a video playing pause frame skipping phenomenon.
In the method of the embodiment of the application, in order to solve the problem of video playing jamming in low bandwidth, when the video playing jamming occurs, the data transmission amount may be reduced, for example, by sending a request for reducing the data transmission amount to the sending end, the sending end is enabled to reduce the data amount of the picture to be sent, so as to reduce the jamming, for example, the sending end reduces the size and/or number of the sent pictures to reduce the data transmission amount.
The method provided by the application can be realized by a server such as a processor executing the corresponding software codes, and can also be realized by the server executing the corresponding software codes and simultaneously performing data interaction with other equipment or servers.
The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 3 is a flowchart illustrating a video transmission method according to an embodiment of the present disclosure. As shown in fig. 3, the method provided by this embodiment includes:
Specifically, the sending end sends a first picture obtained by extracting frames from a video to the requesting end, the requesting end receives the first picture, and if the requesting end determines that the playing is paused, a request for reducing the data transmission amount is sent to the sending end, for example, the requesting end finds that the interval time of the first pictures of adjacent frames is long, the switching speed of the first pictures of adjacent frames is slow, or the actions of people in the pictures of adjacent frames are not consistent, and the like.
Wherein the first data amount information includes: the number of received first pictures within a preset time period, and/or the quality of the first pictures, for example, by a compression rate. The compression rate may refer to a ratio of the size of the first picture to the size of an original picture (an original picture obtained by frame extraction from the video) corresponding to the first picture.
Before a request end sends a request for reducing data transmission quantity, a sending end extracts frames from a video to obtain a first picture, sends the first picture to the request end, and further sends second data quantity information of the first picture to the request end, wherein the second data quantity information of the first picture may include: the number of frames extracted within the preset duration, and/or the quality of the first picture (for example, the compression rate of the first picture), so that after receiving the second data size information of the first picture, the requesting end may determine whether to send the request for reducing the data transmission size to the sending end according to the second data size information and the first data size information of the received first picture, where the number of frames extracted by the requesting end within the preset duration in the first data size information may be different from the number of frames extracted by the sending end in the second data size information, for example, if the number of frames extracted by the requesting end within the preset duration is smaller than the third number of frames, the requesting end sends the request for reducing the data transmission size to the sending end. The compression rate of the first picture in the first data volume information is the same as the compression rate of the first picture in the second data volume information, that is, the compression rate of the first picture in the first data volume information is obtained according to the second data volume information.
In an embodiment, if the request end determines that the number of frames extracted in the preset time period is greater than the number of received first pictures, that is, the number of received first pictures in the preset time period is less than the number of first pictures sent by the sending end, it indicates that the blocking occurs, and a request for reducing the data transmission amount may be sent to the sending end.
Specifically, the requesting terminal receives a first picture sent by the sending terminal, and records the number of the received first pictures within a preset time (for example, one second); the request end judges whether the number of the received first pictures in the preset time length is consistent with the number of the frames of the sending end in the preset time length, if not, namely, if the number of the frames in the preset time length is larger than the number of the received first pictures, the blocking occurs, a request for reducing the data transmission quantity is sent to the sending end, and the sending end is instructed to reduce the sent data quantity, for example, the quality of the sent pictures is reduced and/or the number of the frames in the preset time length is reduced.
And 102, reducing the data volume of the second picture to be sent according to the first data volume information.
Specifically, after receiving the request for reducing the data transmission amount sent by the request end, the sending end may process the video data to be sent according to the first data amount information of the received first picture sent by the request end, so as to reduce the data amount of the picture to be sent, for example, reduce the number of pictures extracted from the video within a preset time period, or compress the pictures extracted from the video, compress the size of the pictures (for example, compress the pictures from 10MB to 5MB), and the like.
In the video transmission method of this embodiment, a request for reducing the data transmission amount is received from a request end, where the request for reducing the data transmission amount includes first data amount information of a first picture received by the request end; according to the scheme, the request end sends a request for reducing data transmission quantity to the sending end after determining that the playing is paused, and the sending end reduces the data quantity of the second picture to be sent according to the first data quantity information of the received first picture in the request, so that the data quantity transmitted through a network is reduced, the playing pause phenomenon is reduced, and the display effect during playing is improved.
On the basis of the foregoing embodiment, further, the step 102 may specifically be implemented by the following several ways:
one implementation is as follows:
if the first data volume information includes: the method comprises the steps that the number of received first pictures in a preset time length of a request terminal is increased, and frames are extracted from a video according to the number of first frames in the preset time length to obtain a second picture to be sent; the first number of decimated frames is less than or equal to the number of first pictures.
Specifically, the sending end may process the video according to first data size information included in the request for reducing the data transmission size, and if the first data size information includes the number of received first pictures in a preset time period, to reduce the data transmission size, the number of frames extracted in the preset time period may be reduced, that is, a first frame extraction number smaller than the original frame extraction number is adopted to extract frames from the video to obtain a second picture to be sent, where the first frame extraction number may be equal to the number of received first pictures in the preset time period of the requesting end, or further, to further reduce the probability of a stuck phenomenon, so as to improve a playing effect, and the first frame extraction number may be smaller than the number of received first pictures in the preset time period of the requesting end.
In this way, by reducing the number of frames, the data transmission amount can be reduced, so that the playing jam can be avoided when the network condition is poor.
On the basis of the above method, if the first data amount information further includes: the compression rate of at least one frame of first picture is smaller than a preset threshold or equal to the preset threshold, and frames are extracted from the video according to the number of first frames within a preset time length to obtain a second picture to be sent;
further, after the frame is extracted to obtain the second picture to be sent, the second picture to be sent can be compressed according to the compression ratio of the second picture to be sent, and the compression ratio of the second picture to be sent is equal to the compression ratio of at least one frame of the first picture.
Or, in other embodiments, if the number of the first frames is less than the number of the received first pictures, the compression rate of the second picture to be sent may also be greater than the compression rate of at least one frame of the first picture, that is, under the condition that the number of the frames is small, the picture size may be increased, that is, the picture quality is improved, and the display effect is improved.
For example, if the compression rate of the first picture is 30% equal to the preset threshold, the number of frames extracted within the preset time period is reduced, the second picture is extracted and compressed according to the compression rate (30%) of the first picture, or the compression rate is increased, for example, the second picture is compressed according to 40% and then transmitted.
In an embodiment, the requesting end records the number of the received second pictures, if the number of the received second pictures in the preset time period is less than the first number of frames, the requesting end may send a request for reducing the data transmission amount again, if the compression rate of the second pictures at this time is less than or equal to the preset threshold, the number of the extracted second pictures is reduced again, the second pictures are extracted and then sent to the requesting end, and the above steps are repeatedly performed until the number of the received pictures in the preset time period recorded by the requesting end is equal to the number of frames extracted by the sending end or the number of frames extracted by the sending end is less than a preset value (e.g., 1 frame/second).
The other realization mode is as follows:
if the first data volume information includes: and compressing the second picture to be sent according to the compression ratio of the second picture to be sent, wherein the compression ratio of the second picture to be sent is less than that of the first picture of at least one frame.
Specifically, if the first data volume information sent by the request end includes the compression ratio of at least one frame of first picture, the compression ratio is the proportion of the size of the first picture to the size of the original picture corresponding to the first picture, in order to reduce the data transmission volume, the sending end compresses the second picture to be sent, the size of the second picture to be sent is reduced, namely the compression ratio is reduced, the compression ratio of the second picture to be sent is determined according to the compression ratio of the first picture, the picture to be sent is compressed according to the compression ratio of the second picture to be sent, the data volume of the second picture to be sent is reduced, and the phenomenon of playing pause when the network condition is poor is avoided.
In this way, the size of the picture is reduced, so that the data transmission amount can be reduced, and the playing pause can be avoided when the network condition is poor.
On the basis of this method, if the first data amount information further includes: if the number of the first pictures received by the request end in the preset time duration is greater than or equal to the number of the second pictures to be sent, before compressing the second pictures to be sent, the following method can be adopted to frame from the video to obtain the second pictures to be sent:
and extracting frames from the video according to a second frame extraction quantity in the preset time length to obtain second pictures to be sent, wherein the second frame extraction quantity is less than or equal to the quantity of the first pictures.
Specifically, in order to reduce the data transmission amount, before compressing the second picture to be sent, the number of frames extracted within the preset time period may be reduced, that is, a first number of frames extracted, which is smaller than the original number of frames, is adopted to extract frames from the video to obtain the second picture to be sent, where the first number of frames may be equal to the number of first pictures received within the preset time period of the request end, or further, in order to further reduce the probability of the katton phenomenon and improve the playing effect, the first number of frames may be smaller than the number of first pictures received within the preset time period of the request end.
In this way, by reducing the number of frames and the size of pictures, the data transmission amount can be reduced, thereby avoiding the playing jam when the network condition is poor.
Further, in order to avoid the quality of the transmitted picture being poor, that is, to ensure the playing effect, before compressing the picture, the following operations may be performed:
determining whether the compression rate of at least one frame of first picture is greater than a preset threshold value;
and if the compression rate is greater than a preset threshold value, executing the compression operation.
Specifically, after receiving the request for reducing the data transmission amount, the sending end performs judgment according to parameters (for example, including the compression ratio of the first picture) carried in the request, and if the compression ratio of the first picture is greater than 30%, that is, the compression ratio is greater than a preset threshold, it indicates that the picture quality is high, and the size of the picture can be further compressed, that is, the compression ratio of the picture is reduced, the picture to be sent is compressed according to the reduced compression ratio, and the compressed picture is sent to the requesting end.
In an embodiment, the request end records the number of the received second pictures, if the number of the received second pictures in the preset time period is less than the number of frames extracted by the sending end, the playing device sends a request for reducing the data transmission amount again, if the compression ratio of the second pictures is greater than the preset threshold, the compression ratio is reduced again, for example, the compression ratio is reduced by 10%, the second pictures to be sent are compressed according to the reduced compression ratio, and then the compressed second pictures are sent to the playing device, and the above steps are repeatedly executed until the number of the received second pictures in the preset time period recorded by the playing device side is equal to the number of frames extracted by the sending end or the compression ratio of the second pictures is less than the preset threshold or equal to the preset threshold.
In the method of this embodiment, after receiving the request for reducing the data transmission amount, the sending end reduces the compression rate of the picture and/or reduces the number of frames extracted when the playback device end has a pause, reduces the pause phenomenon, and improves the display effect of the playback device end.
Fig. 4 is a flowchart illustrating a video transmission method according to an embodiment of the present disclosure. As shown in fig. 4, the method provided by this embodiment includes:
Specifically, the sending end sends a first picture obtained by extracting frames from a video to the requesting end, the requesting end receives the first picture, and if the requesting end determines that the playing is paused, a request for reducing the data transmission amount is sent to the sending end, for example, the requesting end finds that the interval time of the first pictures of adjacent frames is long, the switching speed of the first pictures of adjacent frames is slow, or the actions of people in the pictures of adjacent frames are not consistent, and the like.
Wherein the first data amount information includes: the number of received first pictures within a preset time period, and/or the quality of the first pictures, for example, by a compression rate. The compression rate may refer to a ratio of the size of the first picture to the size of an original picture (an original picture obtained by frame extraction from the video) corresponding to the first picture.
After receiving the request for reducing the data transmission amount sent by the request end, the sending end may process the video data to be sent according to the first data amount information of the received first picture sent by the request end, so as to reduce the data amount of the picture to be sent, for example, reduce the number of pictures extracted from the video within a preset time period, or compress the pictures extracted from the video, compress the size of the pictures (for example, compress the pictures from 10MB to 5MB), and the like.
In another embodiment, the method further comprises:
receiving second data volume information of a first picture obtained by extracting frames from a video, which is sent by a sending end, wherein the second data volume information comprises: the sending end extracts the number of frames within a preset time length;
accordingly, step 202 can also be implemented as follows:
if the number of the frames is larger than the number of the received first pictures in a preset time length, determining to send a request for reducing data transmission quantity to the sending end; the first data amount information includes: the number of the received first pictures in the preset time length.
In another embodiment, if the second data amount information further includes: a compression rate of the sent first picture, where the compression rate is a ratio of a size of the first picture to a size of an original picture corresponding to the first picture, and the original picture is an original picture obtained by frame extraction from the video, and then the first data size information further includes: a compression rate for the first picture has been received.
The method of this embodiment is similar to the method of the embodiment shown in fig. 3 in terms of implementation principle and technical effect, and is not described herein again.
In an embodiment, as shown in fig. 5, the method of this embodiment specifically includes:
s1, the playback device sends a playback request to the server.
Specifically, the playing device serves as a request end to send a playing request to the sending end server, where the playing request may carry an identifier of a video to be played.
And S2, the server acquires the code stream of the video to be played from the acquisition equipment according to the identification of the video to be played.
And S3, the server receives the code stream of the video to be played sent by the acquisition equipment.
Specifically, the server sends a data acquisition request to the video acquisition device, and acquires code stream data from the video acquisition device.
And S4, the server extracts pictures from the code stream.
The server extracts a preset number of pictures from the code stream within a preset time length, for example, extracts N pictures within a single second; n is an integer greater than 1.
S5, the server sends the extracted initial picture data to the playback device, where the initial picture data may include: first picture, number of first pictures extracted in one second, picture quality (e.g., compression rate of first picture).
S6, the playing device receives and plays the first pictures sent by the server, records the number of the first pictures received in one second, and compares whether the number of the first pictures received in one second is matched with the number of the first pictures extracted in one second by the server side.
And S7, if the number does not match, the playing device sends a request for reducing the data transmission amount to the server, and instructs the server to reduce the data transmission amount.
For example, the number of the first pictures received in one second is smaller than the number of the first pictures extracted in one second by the server, the playing device may send a request for reducing the data transmission amount to the server, and the server reduces the data transmission amount according to the request, for example, reduces the picture quality and/or reduces the number of frames extracted from the pictures within a preset time duration. The request to reduce the amount of data transfer includes: the number of first pictures that have been received in a single second, the picture quality (e.g., compression rate of the first pictures).
After receiving the request for reducing the data transmission amount, the server determines whether the compression rate of the picture is greater than a preset threshold (for example, 30%) according to a parameter (for example, the compression rate of the first picture) carried in the request for reducing the data transmission amount, and if the compression rate of the first picture is greater than the preset threshold, S8 is executed, and the server reduces the compression rate of the picture to be sent to the playing device;
and S9, the server sends the compressed picture data to the playing device.
Wherein, the compressed picture data comprises: the number of the compressed second pictures, the number of the second pictures extracted in a single second and the compression rate of the second pictures.
The playback apparatus repeatedly executes S6. The playing device continuously records the number of the received pictures, and if the picture is still stuck, the playing device repeatedly executes the step S7 to continuously send the request for reducing the data transmission amount.
The server judges whether the compression rate is greater than the preset threshold value again, if so, the server repeatedly executes S8-S9 and continues to reduce the compression rate of the picture until the compression rate is less than the preset threshold value or equal to the preset threshold value.
S6', the playing device receives and plays the first pictures sent by the server, records the number of the first pictures received in one second, and compares whether the number of the first pictures received in one second is matched with the number of the first pictures extracted in one second at the server side.
S7', if the numbers do not match, the playing device sends a request to the server to reduce the data transmission amount, instructing the server to reduce the data transmission amount.
For example, the number of the first pictures received in one second is smaller than the number of the first pictures extracted in one second by the server, the playing device may send a request for reducing the data transmission amount to the server, and the server reduces the data transmission amount according to the request, for example, reduces the picture quality and/or reduces the number of frames extracted from the pictures within a preset time duration. The request to reduce the amount of data transfer includes: the number of first pictures that have been received in a single second, the picture quality (e.g., compression rate of the first pictures).
After receiving the request for reducing the data transmission amount, the server judges whether the number of the first pictures extracted per second is greater than a preset value (for example, 1 picture) according to parameters (for example, the compression rate of the first pictures) carried in the request for reducing the data transmission amount, and if the number of the first pictures extracted per second is greater than 1 picture, S8' is executed, and the server reduces the number of frames extracted per second to reduce the data transmission amount;
and S9', the server sends the pictures obtained by frame extraction after the frame extraction number is reduced to the playing equipment.
The compression may be performed before the frame extraction is transmitted, in which case the compression rate may be kept consistent with the compression rate included in the request for reduction of the data transmission amount in S7', or the compression rate may be reduced.
The playing apparatus repeatedly performs S6'.
The playing device continuously records the number of the received pictures, if the picture is still blocked, the playing device repeatedly executes S7 ', continuously sends a request for reducing the data transmission amount, the server judges whether the compression rate is greater than the preset threshold value again, whether the number of the first pictures extracted per second is greater than 1, if the compression rate is less than the preset threshold value or equal to the preset threshold value, and the number of the first pictures extracted per second is greater than 1, the playing device repeatedly executes S8 ' -S9 ', namely, the number of the frames extracted per second is continuously reduced until the number of the frames extracted per second is equal to 1, and then the playing device is finished.
The schemes S8-S9 and S8 '-S9' may be used in combination or individually, and the embodiments of the present application are not limited thereto.
For example, when the compression rate is greater than the preset threshold, in addition to performing the schemes of S8-S9, that is, reducing the compression rate, the number of frames per second may be reduced before compression, and the pictures obtained by frame extraction may be compressed according to the reduced compression rate, thereby further reducing the data transmission amount.
For example, when the number of frames per second is greater than the preset value, in addition to performing the schemes of S8 '-S9', i.e., reducing the number of frames per second, the pictures may be compressed after being framed, for example, the compression rate may be reduced or the compression rate may be unchanged.
In an embodiment, when the compression rate of the picture is less than or equal to a preset threshold (e.g., 30%), S8 'may be performed, and the picture obtained by frame extraction may be compressed before transmission, and the compression rate may be maintained to be consistent with the compression rate included in the request for reducing the data transmission amount in S7', or may be increased.
According to the method, when the network condition is poor and the pause occurs, the compression rate of the picture is increased, and/or the number of frames of the sending end equipment in the preset time length is reduced, so that the pause is reduced, and the display effect is improved.
Fig. 6 is a schematic structural diagram of an embodiment of a video transmission device provided in the present application, and as shown in fig. 6, the video transmission device of the present embodiment includes:
a receiving module 601, configured to receive a request for reducing a data transmission amount from a requesting end, where the request for reducing the data transmission amount includes first data amount information of a first frame of picture received by the requesting end;
the processing module 602 is configured to reduce the data size of the second picture to be sent according to the first data size information.
In a possible implementation manner, if the first data amount information includes: the processing module 602 is specifically configured to, for the number of the first pictures received within a preset time duration of the request end:
extracting frames from the video according to a first frame extraction quantity within a preset time length to obtain a second picture; the first number of frames is less than or equal to the number of the first pictures.
In the method, the number of the frame extraction is reduced, namely the number of the second pictures sent by the sending end in the preset time is reduced, so that the data transmission amount in the network is reduced, and the blocking is avoided.
In a possible implementation manner, if the first data amount information includes: a compression rate of at least one frame of the first picture, where the compression rate is a ratio of a size of the first picture to a size of an original picture corresponding to the first picture, and the original picture is an original picture obtained by frame extraction from the video, then the processing module 602 is specifically configured to:
and compressing the second picture according to the compression rate of the second picture, wherein the compression rate of the second picture is less than that of the first picture of at least one frame.
In the method, the compression rate is reduced, namely the size of the second picture sent by the sending end is reduced, so that the data transmission quantity in the network is reduced, and the blocking is avoided.
In a possible implementation manner, if the first data amount information further includes: the processing module 602 is further configured to, in the number of the first pictures received by the request end within a preset time duration:
before compressing the second picture, extracting frames from a video according to a second frame extraction quantity within a preset time length to obtain the second picture, wherein the second frame extraction quantity is smaller than the quantity of the first pictures or equal to the quantity of the first pictures.
In one possible implementation manner, the method further includes:
the sending module is used for sending a first picture obtained after frame extraction from a video and second data volume information of the first picture to the request end before receiving a request for reducing data transmission volume from the request end; the second data amount information includes: the number of third frames within a preset time length and the compression ratio of the first picture.
In a possible implementation manner, the processing module 602 is further configured to:
determining whether the compression rate of at least one frame of the first picture is greater than a preset threshold value;
and if the compression rate is greater than the preset threshold value, performing the operation of compressing the second picture according to the compression rate of the second picture.
In a possible implementation manner, if the first data amount information further includes: the compression rate of at least one frame of the first picture is less than the preset threshold or equal to the preset threshold, and the processing module 602 is specifically configured to:
and extracting frames from the video according to the first frame extracting quantity in a preset time length to obtain the second picture.
The apparatus of this embodiment may be configured to implement the technical solution of the method embodiment, and the implementation principle and the technical effect are similar, and for a specific implementation process, reference is made to the method embodiment, and details are not described here.
Fig. 7 is a schematic structural diagram of an embodiment of a video transmission device provided in the present application, and as shown in fig. 7, the video transmission device of the present embodiment includes:
a receiving module 701, configured to receive a first picture obtained by frame extraction from a video sent by a sending end;
a processing module 702, configured to determine, according to first data amount information of a received first picture, whether to send a request for reducing a data transmission amount to the sending end, where the request for reducing the data transmission amount includes the first data amount information of the received first picture; the request for reducing the data transmission quantity is used for indicating the sending end to reduce the data quantity of the picture to be sent;
a sending module 703, configured to send a request for reducing the data transmission amount to the sending end if the processing module 702 determines to send the request for reducing the data transmission amount to the sending end.
In a possible implementation manner, the receiving module 701 is further configured to:
receiving second data volume information of a first picture obtained by extracting frames from a video, which is sent by a sending end, wherein the second data volume information comprises: the sending end extracts the number of frames within a preset time length;
correspondingly, if the number of the frames extracted is greater than the number of the received first pictures in the preset duration, the processing module 702 is specifically configured to:
determining to send a request for reducing data transmission amount to the sending end; the first data amount information includes: the number of the received first pictures in the preset time length.
In a possible implementation manner, if the second data amount information further includes: a compression rate of the sent first picture, where the compression rate is a ratio of a size of the first picture to a size of an original picture corresponding to the first picture, and the original picture is an original picture obtained by frame extraction from the video, and then the first data size information further includes: a compression rate for the first picture has been received.
The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
An embodiment of the present application further provides a video transmission system, including:
a sending end device and a requesting end device;
the sending terminal device is used for sending a first picture to the requesting terminal device; receiving the request for reducing the data transmission quantity from the request end equipment; the request for reducing the data transmission quantity comprises first data quantity information of a received first picture;
the sending end device is further configured to reduce the data volume of a second picture to be sent according to the first data volume information;
the request end equipment is used for receiving a first picture sent by the sending end equipment; and sending the request for reducing the data transmission quantity to the sending terminal equipment according to the first data quantity information of the received first picture.
In a possible implementation manner, if the first data amount information includes: the number of the first pictures received within a preset time duration of the request terminal, and the sending terminal device is specifically configured to:
extracting frames from the video according to a first frame extraction quantity within a preset time length to obtain a second picture; the first number of frames is less than or equal to the number of the first pictures.
In a possible implementation manner, if the first data amount information includes: a compression rate of at least one frame of the first picture, where the compression rate is a ratio of a size of the first picture to a size of an original picture corresponding to the first picture, the original picture is an original picture obtained by extracting a frame from the video, and the sending-end device is specifically configured to:
and compressing the second picture according to the compression rate of the second picture, wherein the compression rate of the second picture is less than that of the first picture of at least one frame.
In a possible implementation manner, if the first data amount information further includes: the number of the first pictures received by the request end within a preset time length, and the sending end device is further configured to:
and before compressing the second picture according to the compression rate of the second picture, extracting frames from a video according to a second frame extraction quantity within a preset time length to obtain the second picture, wherein the second frame extraction quantity is less than the quantity of the first pictures or equal to the quantity of the first pictures.
In a possible implementation manner, the sending end device is specifically configured to:
sending a first picture obtained after frame extraction from a video to a request terminal device;
the sender device is further configured to:
sending second data volume information of the first picture to the request terminal equipment; the second data amount information includes: a third number of frames within a preset time duration, and/or a compression rate of the first picture.
In one possible implementation manner, the request end device is further configured to:
receiving second data size information of a first picture sent by sending end equipment before sending a request for reducing data transmission size to the sending end equipment according to the received first data size information of the first picture, wherein the second data size information comprises: the sending end equipment extracts the number of frames within a preset time length;
and determining whether to send the request for reducing the data transmission quantity to the sending terminal equipment or not according to the first data quantity information of the received first picture and the number of frames extracted within the preset time length.
In a possible implementation manner, if the first data amount information includes: the number of the received first pictures in the preset time length, and the request end device is specifically configured to:
and if the number of the frames extracted in the preset time length is larger than the number of the received first pictures in the preset time length, determining to send a request for reducing the data transmission quantity to the sending terminal equipment.
In a possible implementation manner, the sending end device is further configured to:
determining whether the compression rate of at least one frame of the first picture is greater than a preset threshold value before the second picture is compressed according to the compression rate of the second picture;
and if the compression rate is greater than the preset threshold value, performing the operation of compressing the second picture.
In a possible implementation manner, if the first data amount information further includes: the compression rate of the at least one frame of the first picture, and the sending-end device are specifically configured to:
and if the compression rate of at least one frame of the first picture is less than the preset threshold or equal to the preset threshold, extracting frames from the video according to a first frame extraction quantity within a preset time length to obtain the second picture.
The system of this embodiment may be configured to implement the technical solutions of the method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Fig. 8 is a block diagram of an embodiment of an electronic device provided in the present application, and as shown in fig. 8, the electronic device includes:
a processor 801, and a memory 802 for storing executable instructions for the processor 801.
Optionally, the method may further include: a communication interface 803 for communicating with other devices.
The above components may communicate over one or more buses.
The processor 801 is configured to execute the method corresponding to the foregoing sending-end method embodiment by executing the executable instruction, and the specific implementation process of the method may refer to the foregoing method embodiment, which is not described herein again.
The electronic device is, for example, the sending end device of the foregoing embodiment, such as a server.
Fig. 9 is a structural diagram of another embodiment of an electronic device provided in the present application, and as shown in fig. 9, the playback device includes:
a processor 901, and a memory 902 for storing executable instructions for the processor 901.
Optionally, the method may further include: the communication interface 903 is used for communication with other devices, or the electronic device may further include a display for displaying pictures or video data when functioning as a playback device.
The above components may communicate over one or more buses.
The processor 901 is configured to execute the corresponding method in the foregoing request-side method embodiment by executing the executable instruction, and the specific implementation process of the method may refer to the foregoing method embodiment, which is not described herein again.
The embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method in the foregoing method embodiment is implemented.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (13)
1. A video transmission method, comprising:
sending a first picture obtained after frame extraction from a video and first data volume information of the first picture to a request end; the first data amount information includes: the number of first frames within a preset time length and/or the quality of the first picture;
receiving a request for reducing the data transmission quantity from a request end, wherein the request for reducing the data transmission quantity comprises second data quantity information of a first picture received by the request end, and the second data quantity information comprises: the number of the received first pictures in a preset time length of the request terminal and/or the quality of the received first pictures;
and reducing the data volume of a second picture to be sent according to the second data volume information.
2. The method of claim 1, wherein when the second data amount information comprises: when the number of the received first pictures in a preset time duration of the request terminal is less than the number of the received first pictures, reducing the data volume of a second picture to be sent according to the second data volume information, including:
extracting frames from the video according to a first frame extraction quantity within a preset time length to obtain a second picture; the first number of frames is less than or equal to the number of the first pictures.
3. The method of claim 1, wherein when the second data amount information comprises: when the quality of a first picture is received, the quality of the first picture includes a compression rate of the first picture, the compression rate is a ratio of the size of the first picture to the size of an original picture corresponding to the first picture, the original picture is an original picture obtained by frame extraction from the video, and the reduction of the data volume of a second picture to be sent according to the second data volume information includes:
and compressing the second picture according to the compression rate of the second picture, wherein the compression rate of the second picture is less than that of the first picture of at least one frame.
4. The method of claim 3, wherein when the second data amount information further comprises: when the request end receives the number of the first pictures in a preset time period and before compressing the second picture, the method further includes:
and extracting frames from the video according to a second frame extracting quantity in a preset time length to obtain the second pictures, wherein the second frame extracting quantity is less than or equal to the quantity of the first pictures.
5. The method of any of claims 1-4, wherein the quality of the first picture comprises a compression rate of the first picture.
6. The method according to claim 3, wherein before compressing the second picture according to the compression rate of the second picture, further comprising:
determining whether the compression rate of at least one frame of the first picture is greater than a preset threshold value;
and if the compression rate is greater than the preset threshold value, performing the operation of compressing the second picture.
7. The method of claim 2, wherein when the second data amount information further comprises: the method for obtaining the second picture by frame extraction from the video according to the first frame extraction quantity in the preset time length comprises the following steps:
and if the compression rate of at least one frame of the first picture is less than or equal to a preset threshold, extracting frames from the video according to a first frame extraction quantity within a preset time length to obtain a second picture.
8. A video transmission method, comprising:
receiving first data size information of a first picture obtained by frame extraction from a video, which is sent by a sending end, wherein the first data size information comprises: the sending end carries out first frame extraction quantity within a preset time length;
if the first frame extraction quantity is larger than the quantity of the received first pictures in a preset time length, determining to send a request for reducing data transmission quantity to the sending end; the request for reducing the data transmission amount comprises second data amount information of the received first picture, wherein the second data amount information comprises: the number of the received first pictures in a preset time length; the request for reducing the data transmission quantity is used for indicating the sending end to reduce the data quantity of the second picture to be sent.
9. The method of claim 8, wherein the first data amount information further comprises: the compression rate of the sent first picture is a ratio of a size of the first picture to a size of an original picture corresponding to the first picture, and the original picture is an original picture obtained by frame extraction from the video, and then the second data size information further includes: a compression rate for the first picture has been received.
10. A video transmission apparatus, comprising:
the sending module is used for sending a first picture extracted from the video and first data volume information of the first picture to the request terminal; the first data amount information includes: the number of first frames within a preset time length and/or the quality of the first picture;
a receiving module, configured to receive a request for reducing a data transmission amount from a requesting end, where the request for reducing the data transmission amount includes second data amount information that the requesting end has received a first picture, and the second data amount information includes: the number of the received first pictures in a preset time length of the request terminal and/or the quality of the received first pictures;
and the processing module is used for reducing the data volume of the second picture to be sent according to the second data volume information.
11. A video transmission apparatus, comprising:
a receiving module, configured to receive first data size information of a first picture obtained by frame extraction from a video sent by a sending end, where the first data size information includes: the sending end carries out first frame extraction quantity within a preset time length;
if the first frame number is greater than the number of the received first pictures within the preset duration, a processing module, configured to determine to send a request for reducing a data transmission amount to the sending end, where the request for reducing the data transmission amount includes second data amount information of the received first pictures, and the second data amount information includes: the number of the received first pictures in a preset time length; the request for reducing the data transmission quantity is used for indicating the sending end to reduce the data quantity of the picture to be sent;
and the sending module is used for determining to send the request for reducing the data transmission quantity to the sending end at the processing module and sending the request for reducing the data transmission quantity to the sending end.
12. A video transmission system, comprising:
a sending end device and a requesting end device;
the sending end device is used for sending a first picture and first data volume information of the first picture to the requesting end device; the first data amount information includes: the method comprises the steps of presetting a first frame extraction quantity in a time length; receiving a request for reducing the data transmission amount from the request end equipment; the request for reducing the data transmission amount comprises second data amount information of the received first picture, wherein the second data amount information comprises: the number of the received first pictures in a preset time length of the request terminal;
the sending end device is further configured to reduce the data volume of a second picture to be sent according to the second data volume information;
the request end device is configured to receive first data size information of a first picture sent by the sending end device, where the first data size information includes: the sending end carries out first frame extraction quantity within a preset time length; if the first frame extraction quantity is larger than the quantity of the received first pictures in a preset time length, determining to send a request for reducing data transmission quantity to the sending end; the request for reducing the data transmission amount comprises second data amount information of the received first picture, wherein the second data amount information comprises: the number of the received first pictures in a preset time length; the request for reducing the data transmission quantity is used for indicating the sending end to reduce the data quantity of the second picture to be sent.
13. An electronic device, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the method of any of claims 1-9 via execution of the executable instructions.
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| CN201911357649.8A CN111432169B (en) | 2019-12-25 | 2019-12-25 | Video transmission method, device, equipment and system |
| PCT/CN2020/139584 WO2021129830A1 (en) | 2019-12-25 | 2020-12-25 | Video transmission method, apparatus, device and system |
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| CN201911357649.8A CN111432169B (en) | 2019-12-25 | 2019-12-25 | Video transmission method, device, equipment and system |
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| CN111432169B (en) * | 2019-12-25 | 2021-11-30 | 杭州海康威视数字技术股份有限公司 | Video transmission method, device, equipment and system |
| CN113835950B (en) * | 2021-08-20 | 2024-07-05 | 杭州逗酷软件科技有限公司 | Interface display clamping and stopping identification method and device, storage medium and electronic equipment |
| CN115457036B (en) * | 2022-11-10 | 2023-04-25 | 中国平安财产保险股份有限公司 | Detection model training method, intelligent point counting method and related equipment |
| CN116033235B (en) * | 2022-12-13 | 2024-03-19 | 北京百度网讯科技有限公司 | Data transmission method, digital person production equipment and digital person display equipment |
| CN116233372B (en) * | 2023-05-10 | 2023-07-14 | 北京城建智控科技股份有限公司 | Safety monitoring method and system for interior of mobile shelter |
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| CN111432169A (en) | 2020-07-17 |
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