CN113438512A - Control system and control method for fast switching image quality and low code stream of video data - Google Patents
Control system and control method for fast switching image quality and low code stream of video data Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234363—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the spatial resolution, e.g. for clients with a lower screen resolution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
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Abstract
The invention discloses a control system and a control method for fast switching image quality and low code stream of video data, wherein the control system comprises a network camera, a video acquisition module and a stream media management platform, and a video source code stream is processed through the video acquisition module, a decoding VDEC channel, a processing VPSS channel and a coding VENC channel so as to obtain low code stream video output. The code stream coded by the invention is a self-adaptive low code stream, and the size of the code stream is only 20-50% of the original code stream; the time consumed by switching the video parameters is greatly shortened.
Description
Technical Field
The invention relates to the technical field of video data coding and decoding and transmission, in particular to a control system and a control method for fast switching image quality and low code stream of video data.
Background
In the actual use process, because the main code stream of the network camera is large and the network camera picture is watched through the streaming media cloud platform under the condition of insufficient bandwidth resources, the picture can be opened after waiting for 1-2 seconds, and simultaneously, picture delay and screen splash can occur. In addition, when the image quality and the resolution of a watched image are switched in the watching process through the streaming media cloud platform, the network camera needs to be re-streamed due to the fact that the main code stream and the sub code stream acquired by the ONVIF protocol are switched, the process is long in time consumption, and the fluency and the experience feeling are insufficient.
Disclosure of Invention
The present invention is directed to overcome the above technical defects, and provides a system and a method for controlling fast switching of image quality and low code stream of video data.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a video data fast switching image quality and low code stream control system comprises a network camera, wherein the network camera is connected with a video acquisition module through a network, the video acquisition module is connected with a streaming media management platform (capable of viewing videos in real time and selecting corresponding video conditions, image quality, brightness and the like) through the network, the video acquisition module comprises a decoding VDEC channel for decoding video data, the decoding VDEC channel is connected with a processing VPSS channel for processing the video data, the processing VPSS channel is connected with a coding VENC channel for coding the video data, the coding VENC channel is connected with a network management module, the network management module is connected to the processing VPSS channel and the coding VENC channel through a coding control module, and the video acquisition module further comprises a power supply management module; the network management module is connected to the streaming media management platform through a network.
Furthermore, the encoding control module comprises an adaptive encoding parameter allocation module, the adaptive encoding parameter allocation module is connected to the processing VPSS channel through the processing VPSS channel management module and connected to the encoding VENC channel through the encoding VENC channel management module, the adaptive encoding parameter allocation module is further connected with a condition input module, and the condition input module comprises a network bandwidth test module, a custom environment module and a user configuration module.
A control method of a video data fast switching image quality and low code stream control system comprises the following control steps:
s1, controlling the system to start, entering an initialization step, carrying out system initialization again if the initialization is abnormal, and entering the next step if the initialization is normal;
s2 starting the coding control module, binding the address of the network camera to the acquisition channel of the corresponding video acquisition module, returning to the initialization step if the address is abnormal, and entering the next step if the video acquisition module acquires the real-time original code stream of the network camera through the ONVIF protocol;
the method comprises the following steps that S3 a video acquisition module can obtain the format of a video code stream and related frame information by analyzing the content of an ONVIF protocol, the video acquisition module sends the acquired real-time original code stream of the network camera to a corresponding decoding VDEC channel, the decoding VDEC channel carries out decoding operation on the acquired real-time original code stream of the network camera, the decoding VDEC channel transmits the video data to a VPSS channel after decoding and caching a frame of video data, and the next step is carried out;
s4 processing VPSS channel, according to coding control module demand, processing and buffering one frame of video data, transmitting data to coding VENC channel and entering next step;
and the S5 encoding VENC channel encodes the video data in an H.264/H.265 format according to the encoding required by the encoding control module, and transmits the video data to the streaming media management platform for playing through the network management module after the encoding is finished.
Further, when the encoding control module detects a feedback signal of the condition input module in the step S2, the VPSS channel and the encoding VENC channel are controlled and processed according to the signal feedback type, and when the network bandwidth test module detects that the network bandwidth is not enough to support the current video quality, the network bandwidth test module in the condition input module switches to the step S4 to control and process the VPSS channel to process the current video data, so as to change and adjust the video quality; when the network bandwidth testing module in the condition input module detects that the network bandwidth is not enough to support the current video resolution, the step S5 is carried out to control the encoding VENC channel to encode the current video data so as to change the resolution; when the user-defined environment module and/or the user configuration module in the condition input module receives the active image quality adjusting signal, the coding control module switches to the step S4 to control the VPSS channel to process the current video data according to the user active image quality adjusting option result fed back by the network management module, and further changes and adjusts the image quality; when the user-defined environment module and/or the user configuration module in the condition input module receives a signal to actively adjust the resolution, the encoding control module switches to the step S5 to control the encoding VENC channel to perform encoding processing on the current video data according to the resolution option result of the user active adjustment fed back by the network management module, so as to change the resolution.
Compared with the prior art, the invention has the advantages that: the code stream coded by the invention is a self-adaptive low code stream, and the size of the code stream is only 20-50% of the original code stream; the time consumed by switching the video parameters (including resolution, brightness, etc.) is greatly shortened (within 30ms, while the time required by the traditional image quality switching method is more than 1 s).
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FIG. 1 is a block diagram of the system of the present invention
Fig. 2 is a flow chart of the present invention.
FIG. 3 is a system diagram of a code control module of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The following further describes embodiments of the present invention with reference to the accompanying drawings. A video data fast switching image quality and low code stream control system comprises a network camera, wherein the network camera is connected with a video acquisition module through a network, the video acquisition module is connected with a streaming media management platform (capable of viewing videos in real time and selecting corresponding video conditions, image quality, brightness and the like) through the network, the video acquisition module comprises a decoding VDEC channel for decoding video data, the decoding VDEC channel is connected with a processing VPSS channel for processing the video data, the processing VPSS channel is connected with a coding VENC channel for coding the video data, the coding VENC channel is connected with a network management module, the network management module is connected to the processing VPSS channel and the coding VENC channel through a coding control module, and the video acquisition module further comprises a power supply management module; the network management module is connected to the streaming media management platform through a network.
Furthermore, the encoding control module comprises an adaptive encoding parameter allocation module, the adaptive encoding parameter allocation module is connected to the processing VPSS channel through the processing VPSS channel management module and connected to the encoding VENC channel through the encoding VENC channel management module, the adaptive encoding parameter allocation module is further connected with a condition input module, and the condition input module comprises a network bandwidth test module, a custom environment module and a user configuration module.
A control method of a video data fast switching image quality and low code stream control system comprises the following control steps:
s1, controlling the system to start, entering an initialization step, carrying out system initialization again if the initialization is abnormal, and entering the next step if the initialization is normal;
s2 starting the coding control module, binding the address of the network camera to the collecting channel of the corresponding video collecting module, if there is abnormity, returning to the initialization step, if the ONVIF protocol collects the real-time original code stream, entering the next step;
the method comprises the following steps that S3 a video acquisition module can obtain the format of a video code stream and related frame information by analyzing the content of an ONVIF protocol, the video acquisition module sends the acquired real-time original code stream of the network camera to a corresponding decoding VDEC channel, the decoding VDEC channel carries out decoding operation on the acquired real-time original code stream of the network camera, the decoding VDEC channel transmits the video data to a VPSS channel after decoding and caching a frame of video data, and the next step is carried out;
s4 processing VPSS channel, according to coding control module demand, processing and buffering one frame of video data, transmitting data to coding VENC channel and entering next step;
and the S5 encoding VENC channel encodes the video data in an H.264/H.265 format according to the encoding required by the encoding control module, and transmits the video data to the streaming media management platform for playing through the network management module after the encoding is finished.
Further, when the coding control module in S2 detects a feedback signal of the condition input module, it controls the VPSS channel and the coding VENC channel to work according to the signal feedback type, and when the network bandwidth test module in the condition input module detects that the network bandwidth is not enough to support the current video quality, it switches to the step S4 to control the VPSS channel to process the current video data, and further changes and adjusts the video quality; when the network bandwidth testing module in the condition input module detects that the network bandwidth is not enough to support the current video resolution, the step S5 is carried out to control the encoding VENC channel to encode the current video data so as to change the resolution; when the user-defined environment module and/or the user configuration module in the condition input module receives the signal to actively adjust the image quality, the coding control module switches to the step S4 to control the VPSS channel to process the current video data according to the user-active image quality adjustment option result fed back by the network management module, and further changes and adjusts the image quality; when the user-defined environment module and/or the user configuration module in the condition input module receives a signal to actively adjust the resolution, the encoding control module switches to the step S5 to control the encoding VENC channel to perform encoding processing on the current video data according to the resolution option result of the user active adjustment fed back by the network management module, so as to change the resolution.
The overall framework of the invention is shown in fig. 1 in specific implementation, and specifically comprises the following steps:
(1) after the network camera is started, a decoding VDEC channel is started only for the local video watching and video playback functions, data are sent to the corresponding decoding channel when local watching or video playback is needed, and a code stream transmitted to a remote cloud platform through a network protocol can only be an unprocessed original code stream, the traditional network camera needs to switch the resolution ratio when being watched in real time, can only be switched by switching a main code stream and a sub code stream, needs to acquire and bind the watching channel again, and consumes at least more than 1 s; the method fully utilizes hardware resources in the network camera, a VDEC channel is prepared for decoding after the system is started, a VPSS channel is processed, relevant resources of a VENC channel are coded, each cache space is initialized for the next collected video compression data, resource preparation time is saved, the mode of adjusting the resources of the coding channel is adopted for switching resolution, switching time is greatly saved compared with the previous mode, and the whole flow chart is shown in figure 2;
(2) the system collects the main code stream video compression data of the network camera through an ONVIF protocol, and sends the data into a corresponding decoding channel for waiting for decoding;
(3) the video code stream format and the related frame information can be obtained by analyzing the ONVIF protocol content, and the video frames in the cache are decoded by the decoding VDEC channel according to the attached frame information;
(4) after the decoding VDEC channel finishes caching a frame of video data, the video data is transmitted to a VPSS processing channel, and at the moment, the picture can be turned over, and the brightness, the chromaticity and the like can be adjusted according to the watching requirement;
(5) after the VPSS channel is processed to cache one frame of video data, the data are transmitted to an encoding VENC channel, at the moment, the video data need to be encoded in an H.264/H.265 format according to the encoding parameters given by a coding control module according to the current network bandwidth and the actual scene, so that the encoded code stream is a self-adaptive low code stream, and the size of the code stream is only 20% -50% of that of the original code stream;
when the device transmits the video code stream to the streaming media platform, the coding control module detects the current network bandwidth in real time, adapts to the actual scene, and watches the picture resolution to be switched, so as to obtain the coding parameters of the low-code-stream video data, as shown in fig. 3, the time consumed by switching the picture quality (including resolution, brightness and the like) is greatly shortened (within 30ms, while the traditional picture quality switching mode needs more than 1 s);
the present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A video data fast switching picture quality and low code stream control system is characterized in that: the system comprises a network camera, wherein the network camera is connected with a video acquisition module through a network, the video acquisition module is connected with a streaming media management platform (capable of viewing videos in real time and selecting corresponding video conditions, image quality, brightness and the like) through the network, the video acquisition module comprises a decoding VDEC channel for decoding video data, the decoding VDEC channel is connected with a processing VPSS channel for processing the video data, the processing VPSS channel is connected with an encoding VENC channel for encoding the video data, the encoding VENC channel is connected with a network management module, the network management module is connected to the processing VPSS channel and the encoding VENC channel through an encoding control module, and the video acquisition module further comprises a power supply management module; the network management module is connected to the streaming media management platform through a network.
2. The system of claim 1, wherein the video data is fast switched between picture quality and low-bit-rate control, further comprising: the encoding control module comprises a self-adaptive encoding parameter allocation module, the self-adaptive encoding parameter allocation module is connected to a VPSS processing channel through a VPSS processing channel management module and is connected to an encoding VENC channel through an encoding VENC channel management module, the self-adaptive encoding parameter allocation module is further connected with a condition input module, and the condition input module comprises a network bandwidth testing module, a custom environment module and a user configuration module.
3. A control method for video data fast switching image quality and low code stream control system is characterized in that: the system of claim 1 or 2, further comprising:
s1, controlling the system to start, entering an initialization step, carrying out system initialization again if the initialization is abnormal, and entering the next step if the initialization is normal;
s2 starting the coding control module, binding the address of the network camera to the collecting channel of the corresponding video collecting module, if there is abnormity, returning to the initialization step, if the ONVIF protocol collects the real-time original code stream, entering the next step;
the method comprises the following steps that S3 a video acquisition module can obtain the format of a video code stream and related frame information by analyzing the content of an ONVIF protocol, the video acquisition module sends the acquired real-time original code stream of the network camera to a corresponding decoding VDEC channel, the decoding VDEC channel carries out decoding operation on the acquired real-time original code stream of the network camera, the decoding VDEC channel transmits the video data to a VPSS channel after decoding and caching a frame of video data, and the next step is carried out;
s4 processing VPSS channel, according to coding control module demand, processing and buffering one frame of video data, transmitting data to coding VENC channel and entering next step;
and the S5 encoding VENC channel performs format encoding on the video data according to the encoding required by the encoding control module, and transmits the video data to the streaming media management platform for playing through the network management module after the encoding is completed.
4. The method of claim 3, wherein the video data is fast switched between image quality and low-bit-rate control system, further comprising: when the coding control module detects a feedback signal of the condition input module in the step S2, the VPSS channel and the coding VENC channel are controlled and processed according to the signal feedback type, and when the network bandwidth test module in the condition input module detects that the network bandwidth is not enough to support the current video quality, the VPSS channel is controlled and processed in the step S4 to process the current video data, so as to change and adjust the video quality; and when the network bandwidth testing module in the condition input module detects that the network bandwidth is not enough to support the current video resolution, the step S5 is carried out to control the encoding VENC channel to encode the current video data so as to change the resolution.
5. The method of claim 3, wherein the video data is fast switched between image quality and low-bit-rate control system, further comprising: when the user-defined environment module and/or the user configuration module in the condition input module receives the active image quality adjusting signal, the coding control module switches to the step S4 to control the VPSS channel to process the current video data according to the user active image quality adjusting option result fed back by the network management module, and further changes and adjusts the image quality; when the user-defined environment module and/or the user configuration module in the condition input module receives a signal to actively adjust the resolution, the encoding control module switches to the step S5 to control the encoding VENC channel to perform encoding processing on the current video data according to the resolution option result of the user active adjustment fed back by the network management module, so as to change the resolution.
6. The method of claim 3, wherein the video data is fast switched between image quality and low-bit-rate control system, further comprising: the encoding format of the VENC channel encoded in the step S5 is h.264 format encoding.
7. The method of claim 3, wherein the video data is fast switched between image quality and low-bit-rate control system, further comprising: the encoding format of the VENC channel encoded in the step S5 is h.265 format encoding.
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Application publication date: 20210924 |