CN115314731A - Video processing system, method, computer device and storage medium - Google Patents
Video processing system, method, computer device and storage medium Download PDFInfo
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- CN115314731A CN115314731A CN202210716933.5A CN202210716933A CN115314731A CN 115314731 A CN115314731 A CN 115314731A CN 202210716933 A CN202210716933 A CN 202210716933A CN 115314731 A CN115314731 A CN 115314731A
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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, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
Abstract
The present application relates to the field of video processing, and in particular to a video processing system, method, computer device and storage medium, comprising at least one video input unit and at least two video processing units; the video input unit includes: the first reducing module is used for reducing partial video frames in the first video stream and outputting a second video stream containing at least two video frames with different sizes; the video processing unit includes: the device comprises a size screening module, a second reducing module and at least two video transmission channels. When the system is in a first working mode, the output end of the video input unit is connected with the two video processing units, wherein the size screening module of one video processing unit is in a closed state, and the second reducing module is in an open state; the size screening module of the other video processing unit is in an open state, and the second reducing module is in a closed state. The invention reduces the data processing amount and avoids the problems of blocking and the like caused by untimely video stream processing.
Description
Technical Field
The present application relates to the field of video processing, and in particular, to a video processing system, method, computer device, and storage medium.
Background
DVRs, collectively referred to as Digital Video recorders (hard disk recorders), use hard disk Video recording as opposed to conventional analog Video recorders, and are often referred to as hard disk recorders, also referred to as DVRs. The DVR integrates five functions of video recorder, picture divider, pan-tilt-lens control, alarm control, network transmission and the like, can replace the function of a large stack of equipment of an analog monitoring system by one equipment, and has advantages and popularity in price gradually.
The DVR comprises a video processing unit, and the video processing unit is a DVR special chip with the functions of video acquisition, video processing, coding, decoding, display output, universal peripheral interface and the like. In the prior art, a video processing unit processes an input video stream, processes the video stream into video frames with different sizes, outputs the video frames and codes the video frames, and the input amount of the video stream is large, so that the processing pressure of the video processing unit is large, the video stream is not processed in time, and the problems of blocking, delay and the like are caused.
Disclosure of Invention
In view of the above, it is necessary to provide a video processing system, method, apparatus and storage medium for addressing the above technical problems.
In a first aspect, an embodiment of the present invention provides a video processing system, including at least one video input unit and at least two video processing units; wherein, the first and the second end of the pipe are connected with each other,
the video input unit includes: the first reducing module is used for reducing partial video frames in the input first video stream according to a preset video frame size and outputting a second video stream containing at least two video frames with different sizes;
the video processing unit includes: the size screening module is connected to the output end of the first reducing module and is used for screening the video frames of the second video stream according to the size and outputting a third video stream; the input end of the second reducing module is connected with the size screening module and is used for reducing the third video stream according to a preset reducing multiple to obtain a fourth video stream; at least two video transmission channels connected to the output end of the second reducing module, and configured to perform reducing processing on the corresponding fourth video stream according to respective requirements;
when the system is in a first working mode, the output end of the video input unit is connected with two video processing units, wherein the size screening module of one video processing unit is in a closed state, and the second reducing module is in an open state; wherein the size screening module of another one of the video processing units is in an on state and the second downscaling module is in an off state
In one embodiment, the first scaling-down module comprises:
the line reduction module is used for carrying out line reduction processing on part of video frames in the input first video stream according to a preset video frame size;
and the line loss module is used for performing line loss processing on the video frame subjected to line reduction processing according to the preset video frame size.
In one embodiment, the video transmission channel comprises:
the input end of the second frame rate control module is connected with the second reducing module and is used for controlling the corresponding fourth video stream output by the second reducing module according to a preset frame rate;
and the input end of the channel reducing module is connected with the second frame rate control module and is used for reducing the corresponding fourth video stream.
In an embodiment, the video processing unit further comprises:
the input end of the first frame rate control module is connected with the first reducing module, and the output end of the first frame rate control module is connected with the size screening module, and the first frame rate control module is used for controlling the second video stream output by the first reducing module according to a preset frame rate.
In an embodiment, when the system is in the second operating mode, the output end of the video input unit is connected to a video processing unit, the first scaling-down module of the video input unit is in an off state, and the size screening module and the second scaling-down module of the video processing unit are in an off state.
In a second aspect, an embodiment of the present invention provides a video processing method, which is applied to the video processing system, and includes:
determining a working mode of the system based on the acquired parameter information, wherein the working mode comprises a first working mode and a second working mode;
when the system is in a first working mode, controlling the output end of the video input unit to be connected with two video processing units, controlling the size screening module of one video processing unit to be in a closed state, and controlling the second reducing module to be in an open state; controlling the size screening module of another video processing unit to be in an open state, and controlling the second reducing module to be in a closed state;
and when the system is in a second working mode, controlling the output end of the video input unit to be connected with a video processing unit, controlling a first reduction module of the video input unit to be in a closed state, and controlling a size screening module and a second reduction module of the video processing unit to be in a closed state.
In an embodiment, the parameter information includes a video encoding frame rate of the first video stream, and the determining the operation mode of the system based on the acquired parameter information includes:
determining whether the video coding frame rate setting of the first video stream is greater than a set multiple of the first video stream frame rate;
if so, determining that the working mode of the system is a second working mode; if not, determining that the working mode of the system is the first working mode.
In an embodiment, the parameter information includes a display preview screen corresponding to the first video stream, and the determining the operation mode of the system based on the acquired parameter information includes:
determining whether a display preview picture corresponding to the first video stream is larger than a set picture;
if so, determining that the working mode of the system is a second working mode; if not, determining that the working mode of the system is the first working mode.
In a third aspect, an embodiment of the present invention provides a computer device, including a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the method in the second aspect when executing the computer program.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the method of the second aspect.
When the system is in a first working mode, the first reducing module reduces a part of video frames in the input first video stream according to a preset video frame size, outputs a second video stream containing at least two video frames with different sizes, processes one path of the second video stream through the second reducing module, processes the second video stream through the video transmission channel and outputs the second video stream to the display unit, the display unit displays the video streams with different sizes, processes the other path of the second video stream through the size screening module, processes the second video stream through the video transmission channel and outputs the second video stream to the coding unit, and the coding unit codes the received video streams, so that the display of the video streams with different sizes is realized. The invention reduces the data processing amount and avoids the problems of blocking, time delay and the like caused by untimely processing of the video stream.
Drawings
FIG. 1 is a schematic diagram of a video processing system in one embodiment;
FIG. 2 is a schematic diagram of the connection of a first scaling module in one embodiment;
FIG. 3 is a schematic diagram of the connection of video transmission channels in one embodiment;
FIG. 4 is a schematic diagram of the connection of a video processing unit in another embodiment;
FIG. 5 is a schematic diagram of a connection of the video processing system in a first mode of operation in one embodiment;
FIG. 6 is a schematic diagram illustrating the connection of the video processing system in a second mode of operation in one embodiment;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
In an embodiment, as shown in fig. 1, there is provided a video processing system 1 comprising at least one video input unit 10 and at least two video processing units 20; wherein, the video input unit 10 includes: a first reducing module 11, configured to perform reducing processing on a part of video frames in an input first video stream according to a preset video frame size, and output a second video stream including at least two video frames with different sizes; the video processing unit 20 includes: a size screening module 21 connected to an output end of the first reducing module 11, configured to perform screening processing on video frames of the second video stream according to size and output a third video stream; the input end of the second reducing module 22 is connected with the size screening module 21 and is used for reducing the third video stream according to a preset reducing multiple to obtain a fourth video stream; at least two video transmission channels 23 connected to the output end of the second downscaling module 22 are used for performing downscaling processing on the corresponding fourth video stream according to respective requirements.
Compared with the original first video stream, the first video stream subjected to the reduction processing by the first reduction module has smaller data volume, thereby reducing the data processing amount of the video processing unit and avoiding the problems of pause, time delay and the like caused by untimely processing of the video stream.
The video processing unit has the processing capabilities of zooming, noise reduction and the like on images, and can realize that a plurality of video streams with different sizes are output after one input video stream is processed. The plurality of different sized video streams may be full size, 1/2 of full size, etc. In this embodiment, since the first scaling-down module performs scaling-down processing on a part of video frames in the first video stream according to the preset video frame size, the video processing unit performs scaling-down again on the basis of the second video stream, and only needs to scale down fewer multiples compared with the original first video stream, thereby further reducing the data processing amount of the video processing unit and avoiding the problems of jam, delay and the like caused by untimely processing of the video stream.
The second reduction module adopts a pre-reduction mode, namely only supports the reduction of fixed times, for example only supports the reduction of 1/2 of the width and the height, and has small processing complexity and low performance expense compared with the first reduction module for reducing the random size. Therefore, in the present embodiment, a reduction method combining arbitrary size reduction and pre-reduction is adopted, which is less complex and less costly in performance than the method adopting arbitrary size reduction entirely.
In one embodiment, as shown in fig. 2, the first downscaling module 11 comprises a line capture module 111 for capturing the first video stream; a line reduction module 112, configured to perform line reduction processing on a part of video frames in an input first video stream according to a preset video frame size; a line loss module 113, configured to perform line loss processing on the video frame after line reduction processing according to a preset video frame size.
The line capture module 111 sequentially analyzes data input by an external video input bus (such as BT 656) line by line according to a protocol to obtain a line of effective image data, and stores the line of effective image data to obtain a first video stream.
The line reduction module 112 performs reduction processing on the first video stream obtained by the line acquisition module according to a preset video frame size according to user real-time configuration. The reduction method in the present embodiment is not limited, and reduction may be performed by a filter or a missing point method. The reduction factor in this embodiment is not limited, for example, one or more of 1/2 reduction, 1/3 reduction, 1/4 reduction, etc. are supported.
For 1/2 reduction, frame-by-frame reduction may be employed, for example, all lines belonging to the frame are scaled, all lines of the next frame are not scaled, and the next frame is scaled again, and so on. The same reduction method can be applied to 1/3 reduction, 1/4 reduction, and the like.
It should be further noted that the line reduction module 112 may output the second video streams of two video frames with different sizes, or may output the second video streams of a plurality of video frames with different sizes, which may be specifically set according to actual needs. For example, a second video stream of full-size, 1/2 full-size, 1/4 full-size video frames is output.
The line loss module 113 discards or writes the result after the line reduction module finishes processing into the DDR frame buffer. It will be appreciated that the line reduction module implements a horizontal reduction of the video frame, while the line loss module implements a vertical reduction of the video frame.
In one embodiment, as shown in fig. 3, the video transmission channel 23 includes: the input end of the second frame rate control module 231 is connected to the second downscaling module 22, and is configured to control the corresponding fourth video stream output by the second downscaling module 22 according to a preset frame rate; the input end of the channel reduction module 232 is connected to the second frame rate control module 231, and is configured to perform reduction processing on the corresponding fourth video stream.
According to the display requirements of the display windows connected to the video stream processing module, the second frame rate control module 231 performs frame rate control on the corresponding fourth video stream, and the channel reduction module 232 performs reduction processing on the corresponding fourth video stream.
In one embodiment, as shown in fig. 4, the video processing unit 20 further includes: the input end of the first frame rate control module is connected to the first reducing module 11, and the output end of the first frame rate control module is connected to the size screening module 21, and is configured to control the second video stream output by the first reducing module according to a preset frame rate.
In order to meet the requirement of video stream playing, the first frame rate control module controls the second video stream output by the first reducing module according to a preset frame rate, and the specific frame rate control mode can be frame dropping control and the like.
Since not all video streams can be processed in the above-described manner of downscaling, in this embodiment, the video processing system includes a first operation mode and a second operation mode.
As shown in fig. 5, the output of the video input unit 10 is connected to two video processing units 20 when the system is in the first mode of operation. The size screening module of one video processing unit is in a closed state, and the second reducing module is in an open state; the size screening module of the other video processing unit is in an open state, and the second reducing module is in a closed state.
As shown in fig. 6, when the system is in the second operating mode, the output terminal of the video input unit 10 is connected to a video processing unit 20, the first reducing module of the video input unit is in an off state, and the size selecting module and the second reducing module of the video processing unit are in an off state.
When the system is in the first working mode, the working process is as follows: the first reducing module reduces a part of video frames in an input first video stream according to a preset video frame size, and outputs a second video stream comprising at least two video frames with different sizes, wherein one path of the second video stream is processed by the second reducing module, then processed by a video transmission channel and output to a display unit, the display unit displays the video stream, the other path of the second video stream is processed by a size screening module, processed by the video transmission channel and output to an encoding unit, and the encoding unit encodes the received video stream.
When the system is in the second working mode, the working process is as follows: the video input unit does not process the first video stream, the size screening module and the second reducing module do not process the video stream, and the video processing unit sends the video stream to the coding unit and the display unit which are connected to the output end to be processed respectively.
The working mode of the video processing system is determined by the video coding frame rate of the first video stream or the display preview picture corresponding to the first video stream.
When the video encoding frame rate of the first video stream is set to be greater than half of the frame rate of the first video stream, the first operating mode cannot be adopted in this case because the output of the video processing unit outputting for encoding is only half of the frame rate of the first video stream at the maximum in the first operating mode when the first scaling module is set to scale every other frame.
And when the display preview picture corresponding to the first video stream is a large picture, adopting a second working mode. For example, when the video transmission channel is displayed on a single screen and is full-screen, it can be determined to preview a large screen. The decision condition for previewing the large screen can be customized according to the actual needs of the product, which is only an example and is not limited.
In an embodiment, a video processing method is provided, which is described by taking an application scenario in fig. 1 as an example, and includes: and determining the working mode of the system based on the acquired parameter information, wherein the working mode comprises a first working mode and a second working mode.
When the system is in a first working mode, controlling the output end of the video input unit to be connected with the two video processing units, controlling the size screening module of one of the video processing units to be in a closed state, and controlling the second reducing module to be in an open state; controlling the size screening module of another video processing unit to be in an open state, and controlling the second reducing module to be in a closed state; when the system is in a second working mode, the output end of the video input unit is controlled to be connected with a video processing unit, the first reducing module of the video input unit is controlled to be in a closed state, and the size screening module and the second reducing module of the video processing unit are controlled to be in a closed state.
In this embodiment, the working mode of the system is determined based on the acquired parameter information, so that switching of the working mode is realized, and meanwhile, when the system is in the first working mode, the data processing amount of the video processing unit is reduced, and the problems of blocking, delay and the like caused by untimely video stream processing are avoided.
In one embodiment, the parameter information includes a video encoding frame rate of the first video stream, and determining the operation mode of the system based on the acquired parameter information includes:
determining whether the video coding frame rate setting of the first video stream is larger than a set multiple of the frame rate of the first video stream; if so, determining the working mode of the system as a second working mode; if not, determining that the working mode of the system is the first working mode.
In an embodiment, the parameter information includes a display preview screen corresponding to the first video stream, and determining the operating mode of the system based on the acquired parameter information includes:
determining whether a display preview picture corresponding to the first video stream is larger than a set picture; if so, determining the working mode of the system as a second working mode; if not, determining that the working mode of the system is the first working mode.
For the specific limitations of the method, reference may be made to the limitations of the system described above, which are not described in detail herein. The various modules in the above-described apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, and the internal structure thereof may be as shown in fig. 7. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operating system and the computer program to run on the non-volatile storage medium. The database of the computer device is used for storing motion detection data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement the steps in any of the above-described embodiments of the video processing method.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In an embodiment, a computer device is provided, comprising a memory in which a computer program is stored and a processor, which when executing the computer program performs the steps of any of the above method embodiments.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of any of the above-mentioned method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware that is instructed by a computer program, and the computer program may be stored in a non-volatile computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A video processing system comprising at least one video input unit and at least two video processing units; wherein the content of the first and second substances,
the video input unit includes: the first reducing module is used for reducing partial video frames in the input first video stream according to a preset video frame size and outputting a second video stream containing at least two video frames with different sizes;
the video processing unit includes: the size screening module is connected to the output end of the first reducing module and is used for screening the video frames of the second video stream according to the size and outputting a third video stream; the input end of the second reducing module is connected with the size screening module and is used for reducing the third video stream according to a preset reducing multiple to obtain a fourth video stream; at least two video transmission channels connected to the output end of the second reducing module, and configured to reduce the corresponding fourth video stream according to respective requirements;
when the system is in a first working mode, the output end of the video input unit is connected with two video processing units, wherein the size screening module of one video processing unit is in a closed state, and the second reducing module is in an open state; wherein the size screening module of another one of the video processing units is in an on state and the second downscaling module is in an off state.
2. The system of claim 1, wherein the first scaling module comprises:
the line reduction module is used for performing line reduction processing on a part of video frames in the input first video stream according to a preset video frame size;
and the line loss module is used for performing line loss processing on the video frame subjected to line reduction processing according to the preset video frame size.
3. The system of claim 1, wherein the video transmission channel comprises:
the input end of the second frame rate control module is connected with the second reducing module and is used for controlling the corresponding fourth video stream output by the second reducing module according to a preset frame rate;
and the input end of the channel reducing module is connected with the second frame rate control module and is used for reducing the corresponding fourth video stream.
4. The system of claim 1, wherein the video processing unit further comprises:
the input end of the first frame rate control module is connected with the first reducing module, and the output end of the first frame rate control module is connected with the size screening module, and the first frame rate control module is used for controlling the second video stream output by the first reducing module according to a preset frame rate.
5. The system of claim 1,
when the system is in a second working mode, the output end of the video input unit is connected with a video processing unit, the first reducing module of the video input unit is in a closed state, and the size screening module and the second reducing module of the video processing unit are in a closed state.
6. A video processing method applied to the video processing system according to any one of claims 1 to 5, comprising:
determining a working mode of the system based on the acquired parameter information, wherein the working mode comprises a first working mode and a second working mode;
when the system is in a first working mode, controlling the output end of the video input unit to be connected with two video processing units, controlling the size screening module of one video processing unit to be in a closed state, and controlling the second reducing module to be in an open state; controlling the size screening module of another video processing unit to be in an open state, and controlling the second reducing module to be in a closed state;
and when the system is in a second working mode, controlling the output end of the video input unit to be connected with a video processing unit, controlling a first reduction module of the video input unit to be in a closed state, and controlling a size screening module and a second reduction module of the video processing unit to be in a closed state.
7. The method of claim 6, wherein the parameter information comprises a video encoding frame rate of the first video stream, and wherein determining the operating mode of the system based on the obtained parameter information comprises:
determining whether the video encoding frame rate setting of the first video stream is greater than a set multiple of the first video stream frame rate;
if so, determining that the working mode of the system is a second working mode; if not, determining that the working mode of the system is the first working mode.
8. The method according to claim 6, wherein the parameter information comprises a display preview screen corresponding to the first video stream, and the determining the operation mode of the system based on the obtained parameter information comprises:
determining whether a display preview picture corresponding to the first video stream is larger than a set picture;
if so, determining that the working mode of the system is a second working mode; if not, determining that the working mode of the system is the first working mode.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 6 to 8.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 6 to 8.
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