CN111093091A - Video processing method, server and system - Google Patents
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- 238000000034 method Methods 0.000 claims abstract description 9
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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
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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
- H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
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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
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
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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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/8166—Monomedia components thereof involving executable data, e.g. software
- H04N21/8193—Monomedia components thereof involving executable data, e.g. software dedicated tools, e.g. video decoder software or IPMP tool
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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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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- Computer Security & Cryptography (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The present disclosure provides a video processing method, a server, and a system, which relate to the technical field of computer video, and the method includes: acquiring video source information; wherein the video source information comprises video information and audio information; extracting the video information; wherein the video information carries a timestamp; inputting the video information into a video decoder, so that the video decoder decodes at least a first frame of video image frame of the video information, and acquires video parameters according to the video decoder; sending the video parameters to a proxy decoder; wherein, the output of the agent decoder is a preset picture; inputting the preset picture into an image renderer, and acquiring video playing parameters according to the image renderer; and sending the video information, the video parameters and the video playing parameters to a terminal.
Description
Technical Field
The present disclosure relates to the field of computer image technologies, and in particular, to a video processing method, a server, and a system.
Background
At present, the mainstream technical principle of desktop sharing platforms such as a part of remote desktops and cloud terminals is to collect display output of a remote operating system, compress and send an image to a remote terminal device for display, wherein a device used by a user is a terminal device, the terminal device is connected with the remote operating system through a network, the user remotely operates the remote system through the terminal device, and the remote operating system is usually installed on a server.
The general principle of image acquisition and compression is that the previous image is used as a reference, and the subsequent acquisition and compression is transmitted to remote equipment by compressing the changed part of the previous image, so that the consumption of local resources and the occupation of network transmission on bandwidth are reduced as much as possible.
Under a common use scene, the display output of the operating system changes less frequently, the whole display system presents a stable state, and the consumed computing resources and transmission bandwidth are less in the process of image acquisition, compression and transmission of the display output.
However, in a scenario where the display output generated by the remote operating system is mainly played by a video, the frequency of image change of the display output is very high (at least 24 frames per second), a large amount of computing resource images are required to be consumed for acquisition and compression, and a large amount of bandwidth is occupied for transmitting the compressed images, so as to ensure the continuity of the images viewed by the user at the remote device.
Disclosure of Invention
The embodiment of the disclosure provides a video processing method, a server and a system, which can release a large amount of CPU resources and reduce the CPU occupancy rate. The technical scheme is as follows:
according to a first aspect of embodiments of the present disclosure, there is provided a video processing method, including:
acquiring video source information; wherein the video source information comprises video information and audio information;
extracting the video information; wherein the video information carries a timestamp;
inputting the video information into a video decoder, so that the video decoder decodes at least a first frame of video image frame of the video information, and acquires video parameters according to the video decoder;
sending the video parameters to a proxy decoder; wherein, the output of the agent decoder is a preset picture;
inputting the preset picture into an image renderer, and acquiring video playing parameters according to the image renderer;
and sending the video information, the video parameters and the video playing parameters to a terminal.
In one embodiment, the video parameters include video resolution and frame rate, and the video playing information includes window information.
In one embodiment, the predetermined picture is a pure color picture.
In one embodiment, extracting the video information comprises: the video information and the audio information are separated by a video source separator.
In one embodiment, before sending the video parameters to a proxy decoder, the method further comprises:
detecting whether an agent decoder receives an image data acquisition request sent by an image renderer;
if the request for obtaining the image data is received, obtaining the first frame of video image frame from the video decoder;
and acquiring video parameters from the first frame of video image frame.
According to a second aspect of embodiments of the present disclosure, there is provided a server including: the image processing device comprises a processor, a proxy decoder and an image renderer, wherein the processor is used for executing the following steps:
acquiring video source information; wherein the video source information comprises video information and audio information;
extracting the video information; wherein the video information carries a timestamp;
inputting the video information into a video decoder, so that the video decoder decodes at least a first frame image of the video information, and acquires video parameters according to the video decoder;
sending the video parameters to a proxy decoder, wherein the output of the proxy decoder is a preset picture;
inputting the preset picture into an image renderer, and acquiring video playing parameters according to the image renderer;
and sending the video information, the video parameters and the video playing parameters to a terminal.
In one embodiment, the server further includes a video source separator, and the extracting the video information includes: the video information and the audio information are separated by a video source separator.
In one embodiment, the processor is further configured to:
prior to sending the video parameters to a proxy decoder,
detecting whether an agent decoder receives an image data acquisition request sent by an image renderer;
if the request for obtaining the image data is received, obtaining the first frame of video image frame from the video decoder;
and acquiring video parameters from the first frame of video image frame.
According to a third aspect of the embodiments of the present disclosure, there is provided a video processing system including any one of the servers and a terminal, the terminal including: the first acquisition module is used for acquiring video information; the video information is extracted by a server according to video source information, and the video information carries a timestamp; the second acquisition module is used for acquiring video parameters and video playing parameters; and the display module is used for displaying the image corresponding to the video information according to the video parameter and the video playing parameter according to the timestamp.
According to the method, the original H264 code stream is intercepted from the video resource played by the remote system video player and transmitted to the remote equipment, and the local video playing area is set to be a constant image (such as a pure color image), so that the change of a video part is ignored in the image acquisition and compression process of display output, and the performance loss of computing resources and bandwidth resources caused by image acquisition and compression transmission of the display output of the server side is greatly reduced.
The present disclosure may replace a real video decoder with a proxy decoder that sends pre-generated solid color still image data to an image renderer after acquiring video parameters (video resolution and frame rate) so that the video decoder only performs decoding of at least the first frame of the H264 code stream. Therefore, most decoding tasks can be saved, a large amount of CPU resources are released, and the CPU occupancy rate is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
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 a flowchart of a video processing method provided by an embodiment of the present disclosure;
fig. 2 is a flowchart of a video processing method provided by an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a video processing flow provided by an embodiment of the present disclosure;
FIG. 4 is a diagram of a server architecture provided by an embodiment of the present disclosure;
FIG. 5 is a diagram of a server architecture provided by an embodiment of the present disclosure;
fig. 6 is a diagram of a terminal structure provided in the embodiment of the present disclosure;
fig. 7 is a block diagram of a video processing system according to an embodiment of the present disclosure.
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 present disclosure provides a video processing method, a server and a system, which enable a large amount of CPU resources to be released in the video processing process and reduce the CPU occupancy rate.
An embodiment of the present disclosure provides a video processing method, as shown in fig. 1, the video processing method includes the following steps:
video sources are usually stored in formats such as mp4 and mkv, and video information and audio need to be separated from video resources stored in formats such as mp4 and mkv, and then the video information and the audio information are decoded and rendered respectively before being played.
Specifically, the video information and the audio information are separated by a video source separator.
Illustratively, the video information is in the form of an H264 bitstream.
the proxy decoder is preset, and the proxy decoder does not have a decoding function. The proxy decoder is connected with the video separator and the image renderer, and when the image renderer acquires the image data from the video decoder, the proxy decoder can acquire the image data from the video decoder and then forward the image data to the image renderer. The original video decoder is no longer directly connected to the image renderer and the video source separator.
Specifically, the H264 code stream is input to the proxy decoder, and the video picture frame is output.
The input of the video decoder is an H264 code stream, and the output is a preset picture. And determining video parameters according to the preset picture, wherein the video parameters comprise video resolution and frame rate.
Optionally, the preset picture is a fixed picture, for example, a same pure color picture.
Compared with the prior art, the proxy decoder can release a large amount of CPU resources and reduce the CPU occupancy rate because the proxy decoder does not have the decoding function.
the video playing parameters comprise window information. Optionally, the window information includes: at least one of window identification, window position, and window resolution.
The triggering condition is that a user opens the video player through remote operation of the terminal device, or the user changes the size of a display frame of the video player through remote operation of the terminal device, such as full screen or zooming the display frame. Regardless of whether the video picture frame is input by the image renderer.
And step 106, sending the video information, the video parameters and the video playing parameters to a terminal.
Optionally, the fixed picture output by the image renderer may also be sent to the terminal for a player display window of the terminal to output.
Specifically, the server display output includes a video portion, but typically includes more than the video portion, such as a small window playing video, and the portion other than the small window may be a still picture (or not change drastically). In this step, in the small window where the video should be played originally, the fixed picture output by the image encoder is displayed, and the part except the small window is not changed, and the content of the original still picture is still displayed.
Therefore, the image output by the window area of the video player is a fixed image, so that the frequency of acquiring pictures cannot be influenced by the video, and the acquisition frequency can be reduced.
And finally, carrying out image acquisition and compression on the display output of the server to obtain a compressed image.
It can be understood that the server display output in this step no longer includes an image portion, and therefore, the change frequency of the server display output is lower, and correspondingly, the image acquisition frequency can be lower, so that the acquisition and compression of the image consume less computing resources.
It should be noted that, in the prior art, in response to a remote operation of a user through a remote device, a server decodes and plays video resources stored in formats such as mp4 and mkv, and further collects, compresses and transmits a played picture, in the present invention, an H264 code stream is extracted from the video resources stored in formats such as mp4 and mkv at the server side, and the H264 code stream is directly transmitted, where the H264 code stream itself is data obtained by compressing video graphics frames.
Therefore, the method not only avoids the large workload of the server for decoding the video resource and acquiring and compressing the playing picture, and saves the computing resource, but also has smaller data quantity of the H264 code stream compared with the method for acquiring and compressing the playing picture, and saves the bandwidth resource.
For example, for a 10-minute video with 1920 × 1080 resolution, the H264 stream is about 200M, and the compressed data is at least 1G for the playback screen.
Fig. 2 is a schematic diagram of a video processing flow provided by the embodiment of the disclosure, in practical applications, the processing flow in the block of fig. 3 may be implemented by Media Foundation, and the present invention may be improved on the basis of the Media Foundation.
Media Foundation is a new generation of multimedia application library launched by microsoft on Windows Vista, and aims to provide a unified multimedia video solution for Windows platform, and developers can play video or sound files, transcode multimedia file formats, or encode a series of pictures into video, etc. through Media Foundation. Windows Media Player, etc. is written using the Media Foundation framework.
An embodiment of the present disclosure provides a video processing method, as shown in fig. 2, the video processing method includes the following steps:
and 203, displaying the image corresponding to the video information according to the video parameter and the video playing parameter according to the timestamp.
The video parameters comprise video resolution and frame rate, and the video playing information comprises window information.
After receiving the H264 code stream, the terminal decodes the H264 code stream and renders the decoded image according to the received video parameters and video playing parameters; and then, covering the rendered video picture frame in the original video playing window area in the decompressed image according to the time stamp.
Fig. 4 is a diagram of a server structure provided in an embodiment of the present disclosure, where the server 40 shown in fig. 4 includes: a video decoder 400, a proxy decoder 401, a processor 402, an image renderer 403, wherein the processor 402 is configured to:
acquiring video source information; wherein the video source information comprises video information and audio information;
extracting the video information; wherein the video information carries a timestamp;
inputting the video information into a video decoder, so that the video decoder decodes at least a first frame of video image frame of the video information, and acquires video parameters according to the video decoder;
sending the video parameters to a proxy decoder; wherein, the output of the agent decoder is a preset picture;
and sending the video information, the video parameters and the video playing parameters to a terminal.
Optionally, the processor 402 may be further configured to perform:
prior to sending the video parameters to a proxy decoder,
detecting whether an agent decoder receives an image data acquisition request sent by an image renderer;
if the request for obtaining the image data is received, obtaining the first frame of video image frame from the video decoder;
and acquiring video parameters from the first frame of video image frame.
Fig. 5 is a diagram of a server structure provided in an embodiment of the present disclosure, where the server 50 shown in fig. 5 includes: a video decoder 500, a proxy decoder 501, a processor 502, an image renderer 503, and a video source separator 504, wherein the extracting the video information includes: the video information and the audio information are separated by a video source separator.
Fig. 6 is a block diagram of a terminal according to an embodiment of the present disclosure, where the terminal 60 shown in fig. 6 includes:
a first obtaining module 601, configured to obtain video information; the video information is extracted by a server according to video source information, and the video information carries a timestamp;
a second obtaining module 602, configured to obtain a video parameter and a video playing parameter;
and the display module 603 is configured to display the image corresponding to the video information according to the video parameter and the video playing parameter according to the timestamp.
Fig. 7 is a block diagram of a video processing system according to an embodiment of the present disclosure, where the video processing system shown in fig. 7 includes a server 701 according to any one of the above embodiments and a terminal 702 according to any one of the above embodiments.
Based on the video processing method described in the embodiment corresponding to fig. 1, an embodiment of the present disclosure further provides a computer-readable storage medium, for example, the non-transitory computer-readable storage medium may be a Read Only Memory (ROM), a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like. The storage medium stores computer instructions for executing the video processing method described in the embodiment corresponding to fig. 1, which is not described herein again.
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.
Claims (10)
1. A video processing method applied to a server is characterized by comprising the following steps:
acquiring video source information; wherein the video source information comprises video information and audio information;
extracting the video information; wherein the video information carries a timestamp;
inputting the video information into a video decoder, so that the video decoder decodes at least a first frame of video image frame of the video information, and acquires video parameters according to the video decoder;
sending the video parameters to a proxy decoder; wherein, the output of the agent decoder is a preset picture;
inputting the preset picture into an image renderer, and acquiring video playing parameters according to the image renderer;
and sending the video information, the video parameters and the video playing parameters to a terminal.
2. The video processing method of claim 1, wherein the video parameters comprise video resolution and frame rate, and the video playing information comprises window information.
3. The video processing method according to claim 1, wherein the predetermined picture is a pure color picture.
4. The video processing method of claim 1, wherein the extracting the video information comprises: the video information and the audio information are separated by a video source separator.
5. The video processing method of claim 1, wherein before sending the video parameters to a proxy decoder, the method further comprises:
detecting whether an agent decoder receives an image data acquisition request sent by an image renderer;
if the request for obtaining the image data is received, obtaining the first frame of video image frame from the video decoder;
and acquiring video parameters from the first frame of video image frame.
6. A server, characterized in that the server comprises: the image processing device comprises a processor, a proxy decoder and an image renderer, wherein the processor is used for executing the following steps:
acquiring video source information; wherein the video source information comprises video information and audio information;
extracting the video information; wherein the video information carries a timestamp;
inputting the video information into a video decoder, so that the video decoder decodes at least a first frame image of the video information, and acquires video parameters according to the video decoder;
sending the video parameters to a proxy decoder, wherein the output of the proxy decoder is a preset picture;
inputting the preset picture into an image renderer, and acquiring video playing parameters according to the image renderer;
and sending the video information, the video parameters and the video playing parameters to a terminal.
7. The server of claim 6, further comprising a video source separator, wherein said extracting the video information comprises: the video information and the audio information are separated by a video source separator.
8. The server according to claim 6, wherein the predetermined picture is a pure color picture.
9. The server of claim 6, wherein the processor is further configured to:
prior to sending the video parameters to a proxy decoder,
detecting whether an agent decoder receives an image data acquisition request sent by an image renderer;
if the request for obtaining the image data is received, obtaining the first frame of video image frame from the video decoder;
and acquiring video parameters from the first frame of video image frame.
10. A video processing system comprising the server of any one of claims 6 to 9 and a terminal, the terminal comprising:
the first acquisition module is used for acquiring video information; the video information is extracted by a server according to video source information, and the video information carries a timestamp;
the second acquisition module is used for acquiring video parameters and video playing parameters;
and the display module is used for displaying the image corresponding to the video information according to the video parameter and the video playing parameter according to the timestamp.
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Application publication date: 20200501 |