CN108965807B - Real-time video playing control method and device, terminal and storage medium - Google Patents
Real-time video playing control method and device, terminal and storage medium Download PDFInfo
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- CN108965807B CN108965807B CN201810784197.0A CN201810784197A CN108965807B CN 108965807 B CN108965807 B CN 108965807B CN 201810784197 A CN201810784197 A CN 201810784197A CN 108965807 B CN108965807 B CN 108965807B
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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
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
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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
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
- H04N21/2407—Monitoring of transmitted content, e.g. distribution time, number of downloads
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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
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44209—Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network
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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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
- H04N21/64738—Monitoring network characteristics, e.g. bandwidth, congestion level
Abstract
The invention is suitable for the technical field of real-time videos, and provides a playing control method, a device, a terminal and a storage medium of a real-time video, wherein the method comprises the following steps: monitoring the transmission speed of real-time video frames being played, monitoring cached video frames in a play queue when the transmission speed is lower than a preset transmission speed, reducing the number of the cached video frames played in unit time when the number of the cached video frames is continuously reduced, increasing the number of the cached video frames played in unit time when the number of the cached video frames is continuously increased or continuously maintained at the number of the cacheable video frames in the play queue, and controlling the playing of the real-time video by properly adjusting the played video frames in unit time, thereby realizing the smooth playing of the real-time video and further improving the user experience.
Description
Technical Field
The invention belongs to the technical field of real-time videos, and particularly relates to a playing control method, a playing control device, a playing control terminal and a storage medium of a real-time video.
Background
At present, network video equipment is widely applied to aspects of security protection, smart home and the like, such as a network camera and the like, images shot by the network camera can be stored and played and can be played online in real time, because the current network camera mainly uses H264 and H265 codes, the two codes encode collected videos into I frames, B frames and P frames to be transmitted so as to reduce the total bandwidth, the I frames occupy a large bandwidth and are relatively slow to transmit, the B frames and the P frames can be correctly decoded only depending on the I frames, when the network transmission state is not ideal, the transmission time consumption of the I frames is too long, the I frames cannot reach a playing terminal within an appointed time, the P frame data amount of the B frames is small, the speed of the B frames reaches the playing terminal is high, when the playing terminal carries out online instant playing, the I frame data does not reach the playing terminal within the appointed time, the playing terminal can generate video blocking, and the video blocking can be blocked, And then suddenly fast forward, referred to as video judder.
The current method for processing video jitter is to reduce the transmission of video frames, so the data to be transmitted is not too large, but the method reduces the definition of video pictures and the user experience is reduced accordingly.
Disclosure of Invention
The invention aims to provide a playing control method, a playing control device, a playing control terminal and a storage medium of a real-time video, and aims to solve the problems of video jitter (stutter) and low user experience during online real-time playing of the video due to the fact that an effective video playing method cannot be provided in the prior art.
In one aspect, the present invention provides a method for controlling playing of a real-time video, the method comprising the following steps:
monitoring the transmission speed of a real-time video frame being played;
when the transmission speed is lower than a preset transmission speed, monitoring the cached video frames in the play queue;
when the frame number of the cached video frame is monitored to be continuously reduced, reducing the number of the cached video frame played in unit time;
and when the buffered video frame number is continuously increased or continuously maintained at the cacheable video frame number of the play queue, increasing the buffered video frame number played in unit time.
In another aspect, the present invention provides a device for controlling playing of a real-time video, the device comprising:
the speed monitoring unit is used for monitoring the transmission speed of the real-time video frame which is being played;
the video frame monitoring unit is used for monitoring the cached video frames in the play queue when the transmission speed is lower than a preset transmission speed;
a frame number reducing unit, configured to reduce the number of buffered video frames played in a unit time when it is monitored that the number of buffered video frames is continuously reduced; and
a first increasing unit, configured to increase the number of buffered video frames played in a unit time when it is monitored that the number of buffered video frames continuously increases or the number of buffered video frames continuously remains in the play queue.
In another aspect, the present invention further provides a video playing terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the playing control method for real-time video as described above when executing the computer program.
In another aspect, the present invention further provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of the method for controlling playing of real-time video.
The invention monitors the transmission speed of the real-time video frame being played, monitors the cached video frame in the playing queue when the transmission speed is lower than the preset transmission speed, reduces the cached video frame number played in unit time when the cached video frame number is continuously reduced, increases the cached video frame number played in unit time when the cached video frame number is continuously increased or continuously maintained at the cacheable video frame number of the playing queue, and controls the playing of the real-time video by properly adjusting the played video frame in unit time, thereby realizing the smooth playing of the real-time video.
Drawings
Fig. 1 is a flowchart illustrating an implementation of a method for controlling playing of a real-time video according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a real-time video playing control method according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a real-time video playing control apparatus according to a third embodiment of the present invention; and
fig. 4 is a schematic structural diagram of a video playback device according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of specific implementations of the present invention is provided in conjunction with specific embodiments:
the first embodiment is as follows:
fig. 1 shows an implementation flow of a real-time video playing control method according to a first embodiment of the present invention, and for convenience of description, only the relevant parts related to the embodiment of the present invention are shown, and the following details are described below:
in step S101, the transmission speed of the real-time video frame being played is monitored.
The invention is suitable for cameras based on H264 and H265 coding, such as network cameras and the like. In the embodiment of the invention, when the real-time video is playing, the transmission speed of the video frame is detected first, so as to know the congestion condition of the transmission network.
In step S102, when the transmission speed is less than the preset transmission speed, the buffered video frames in the play queue are monitored.
In the embodiment of the present invention, at a preset transmission speed, the number of video frame frames played at a normal frame rate is equal to the number of video frame frames buffered (transmitted) in a unit time, where the unit time is 1 second, and when the transmission speed is lower than the preset transmission speed, it indicates that the number of video frame frames played is greater than the number of video frame frames buffered in the unit time, and the number of buffered video frame frames of a play queue at the current time is less than the number of buffered video frame frames in the previous unit time, and at this time, the buffered video frames are monitored.
In step S103, when it is detected that the number of buffered video frames is continuously decreased, the number of buffered video frames played in a unit time is decreased.
In the embodiment of the invention, when the number of the buffered video frame frames is continuously reduced, the network is indicated to be not smooth continuously, the number of the played video frame frames is more than that of the buffered video frame frames in unit time, at the moment, the number of the buffered video frame frames played in unit time is reduced, and on the basis that human eyes cannot distinguish the playing speed, the playing progress of the real-time video is slowed down, so that more sufficient buffering time is provided. For example, the number of buffered video frames is reduced by 1 frame at the 1 st monitoring time, and is reduced by 2 frames at the 2 nd monitoring time, and the number of buffered video frames is continuously reduced at the 2 nd monitoring time, which indicates that the network congestion causes the number of buffered video frames at the playing end to be reduced, and at this time, the number of buffered video frames played within 1 frame unit time is reduced, so that the fluency of video playing during network congestion is improved.
In step S104, when it is monitored that the number of buffered video frame is continuously increased or the number of cacheable video frame that is continuously maintained in the play queue, the number of buffered video frame that is played in a unit time is increased.
In the embodiment of the invention, the cacheable video frame number of the play queue is the maximum value of the cacheable video frame number of the play queue, when the buffered video frame number is continuously increased or continuously maintained at the cacheable video frame number of the play queue, the buffered video frame number played in the current unit time is less than the buffered video frame number in the unit time, at the moment, the buffered video frame number played in the unit time is increased, and the increased frame number is still less than the buffered video frame number in the unit time, so as to ensure that the buffered video frame number of the play queue is continuously increased to the cacheable video frame number of the play queue, thereby smoothly accelerating the live broadcast progress and increasing the live broadcast real-time. Illustratively, for example, the number of buffered video frame frames is 1 frame more at the 1 st monitoring time, 2 frames more at the 2 nd monitoring time, and the number of buffered video frame frames continuously increases at the aforementioned 2 monitoring times, i.e. indicating that the network is smooth, at this time, the number of buffered video frame frames played in 1 frame unit time is increased, thereby smoothly speeding up the live broadcast progress.
Preferably, when the number of the buffered video frames is monitored to be lower than the preset number, the number of the buffered video frames in the play queue is increased, the buffered video frames are paused to be played, the buffered video frames are resumed to be played after the preset buffering duration, and when the network is not smooth, frequent video jitter is avoided, so that the user experience is improved. Specifically, the preset frame number is the number of video frames played within 1 second when the normal video is played, that is, 25 frames.
Further preferably, after the step of pausing the playing of the buffered video frames and before the step of resuming the playing of the buffered video frames, a preset buffer duration is obtained by a formula T ═ N × Gop/frame + (T-1/frame)/M, so as to quickly obtain the preset buffer duration, where T is the preset buffer duration, N, M is a constant, Gop is a cacheable video frame number of the play queue, T is an actual transmission duration difference of adjacent video frames in the video frame I frame, and frame is a video frame rate, and 1/frame is a theoretical transmission duration difference of adjacent video frames in the video frame I frame, and specifically, frame is 25 (frames/second). Specifically, N and M may be set according to the network transmission speed at the time of pausing the playback.
Preferably, when the transmission speed is not less than the preset transmission speed, the number of buffered video frames played in a unit time is increased, thereby increasing the real-time performance of the real-time video. Illustratively, during live broadcast ball game, during normal play, the number of buffered video frames played in unit time is 25, the live broadcast progress is delayed by 60 seconds compared with the actual ball game progress, when the network is smooth, the transmission time of the live broadcast video frames is 20 seconds, at this time, the number of buffered video frames played in unit time is increased to 28 frames, so that the live broadcast delay time is continuously reduced to 20 seconds, and finally the buffered video frames played in unit time are restored to 25 frames, namely, the live broadcast video is immediately played for 1 second after being buffered for 1 second, thereby smoothly accelerating the live broadcast progress and increasing the live broadcast real-time.
In the embodiment of the invention, the transmission speed of the real-time video frame being played is monitored, when the transmission speed is lower than the preset transmission speed, the cached video frame in the playing queue is monitored, when the number of the cached video frame is continuously reduced, the number of the cached video frame played in unit time is reduced, when the number of the cached video frame is continuously increased or continuously maintained at the cacheable video frame number of the playing queue, the number of the cached video frame played in unit time is increased, and the playing of the real-time video is controlled by appropriately adjusting the playing video frame in unit time, so that the smooth playing of the real-time video is realized, and the user experience is improved.
Example two:
fig. 2 shows a structure of a real-time video playing control device according to a second embodiment of the present invention, and for convenience of description, only the portions related to the second embodiment of the present invention are shown, which include:
a speed monitoring unit 21, configured to monitor a transmission speed of a real-time video frame being played;
the video frame monitoring unit 22 is configured to monitor the buffered video frames in the play queue when the transmission speed is lower than a preset transmission speed;
a frame number reducing unit 23, configured to reduce the number of buffered video frames played in a unit time when it is monitored that the number of buffered video frames is continuously reduced; and
the first increasing unit 24 is configured to increase the number of buffered video frames played in a unit time when it is detected that the number of buffered video frames continuously increases or the number of cacheable video frames continuously remains in the play queue.
In the embodiment of the invention, the transmission speed of the real-time video frame being played is monitored, when the transmission speed is lower than the preset transmission speed, the cached video frame in the playing queue is monitored, when the number of the cached video frame is continuously reduced, the number of the cached video frame played in unit time is reduced, when the number of the cached video frame is continuously increased or continuously maintained at the cacheable video frame number of the playing queue, the number of the cached video frame played in unit time is increased, and the playing of the real-time video is controlled by appropriately adjusting the playing video frame in unit time, so that the smooth playing of the real-time video is realized, and the user experience is improved.
In the embodiment of the present invention, each unit of the real-time video playing control device may be implemented by a corresponding hardware or software unit, and each unit may be an independent software or hardware unit, or may be integrated into a software or hardware unit, which is not limited herein. The detailed implementation of each unit can refer to the description of the first embodiment, and is not repeated herein.
Example three:
fig. 3 shows a structure of a real-time video playing control device according to a third embodiment of the present invention, and for convenience of description, only the portions related to the third embodiment of the present invention are shown, which include:
a speed monitoring unit 31, configured to monitor a transmission speed of a real-time video frame being played;
the video frame monitoring unit 32 is configured to monitor the buffered video frames in the play queue when the transmission speed is lower than a preset transmission speed;
a frame number reducing unit 33, configured to reduce the number of buffered video frames played in a unit time when it is monitored that the number of buffered video frames is continuously reduced;
a first increasing unit 34, configured to increase the number of buffered video frames played in a unit time when it is monitored that the number of buffered video frames continuously increases or the number of buffered video frames continuously remains in the play queue;
a pause playing unit 35, configured to increase the number of cacheable video frames in the play queue and pause playing the cached video frames when it is monitored that the number of the cached video frames is lower than the preset number of frames;
a duration obtaining unit 36, configured to obtain the preset buffer duration according to a formula T ═ N × Gop/Framerate + (T-1/Framerate)/M;
a resuming playing unit 37, configured to resume playing the cached video frame after a preset caching duration; and
a second increasing unit 38, configured to increase the number of buffered video frame frames played in a unit time when the transmission speed is not less than the preset transmission speed.
In the embodiment of the present invention, the transmission speed of the real-time video frames being played is monitored, when the transmission speed is lower than the preset transmission speed, the buffered video frames of the play queue are monitored, when the number of the buffered video frames is continuously decreased, the number of the buffered video frames played in a unit time is decreased, when the number of the buffered video frames is continuously increased or continuously maintained at the number of the cacheable video frames of the play queue, the number of the buffered video frames played in a unit time is increased, when the number of the buffered video frames is lower than the preset number of frames, the number of the cacheable video frames of the play queue is increased, the playing of the buffered video frames is suspended, after the preset buffering time, the video playing is resumed, when the transmission speed is not lower than the preset transmission speed, the number of the buffered video frames played in a unit time is increased, so that, the playing of the real-time video is controlled by properly adjusting the playing video frames in unit time, so that the smooth playing of the real-time video is realized, and the user experience is improved.
In the embodiment of the present invention, each unit of the real-time video playing control device may be implemented by a corresponding hardware or software unit, and each unit may be an independent software or hardware unit, or may be integrated into a software or hardware unit, which is not limited herein. The detailed implementation of each unit can refer to the description of the first embodiment, and is not repeated herein.
Example four:
fig. 4 shows a structure of a video playback terminal according to a fourth embodiment of the present invention, and for convenience of description, only the portions related to the fourth embodiment of the present invention are shown.
The user equipment 4 of an embodiment of the present invention comprises a processor 40, a memory 41 and a computer program 42 stored in the memory 41 and executable on the processor 40. The processor 40 executes the computer program 42 to implement the steps in the above-mentioned real-time video playing control method embodiment, such as the steps S101 to S104 shown in fig. 1. Alternatively, the processor 40 implements the functions of the units in the above-described playback control apparatus embodiments of each real-time video, such as the functions of the units 21 to 24 shown in fig. 2 and the functions of the units 31 to 38 shown in fig. 3, when executing the computer program 42.
In the embodiment of the invention, when the processor executes a computer program, the transmission speed of real-time video frames being played is monitored, when the transmission speed is lower than the preset transmission speed, the cached video frames in the playing queue are monitored, when the number of the cached video frames is continuously reduced, the number of the cached video frames played in unit time is reduced, when the number of the cached video frames is continuously increased or continuously maintained at the cacheable video frame number of the playing queue, the number of the cached video frames played in unit time is increased, and the played video frames in unit time are appropriately adjusted, so that the playing of the real-time video is controlled, the smooth playing of the real-time video is realized, and the user experience is improved.
The steps in the embodiment of the method for controlling playing of a real-time video when the processor executes the computer program may refer to the description of the first embodiment, and are not described herein again.
Example five:
in an embodiment of the present invention, a computer-readable storage medium is provided, which stores a computer program, and the computer program, when executed by a processor, implements the steps in the above-mentioned real-time video playing control method embodiment, for example, steps S101 to S104 shown in fig. 1. Alternatively, the computer program, when executed by the processor, implements the functions of the units in the above-described respective real-time video playback control apparatus embodiments, such as the functions of the units 21 to 24 shown in fig. 2 and the functions of the units 31 to 38 shown in fig. 3.
In the embodiment of the invention, when being executed by a processor, the computer program monitors the transmission speed of real-time video frames being played, monitors cached video frames in a playing queue when the transmission speed is lower than a preset transmission speed, reduces the number of the cached video frames played in unit time when monitoring that the number of the cached video frames is continuously reduced, increases the number of the cached video frames played in unit time when monitoring that the number of the cached video frames is continuously increased or continuously maintained at the number of the cacheable video frames in the playing queue, and appropriately adjusts the played video frames in unit time, so that the playing of the real-time video is controlled, the smooth playing of the real-time video is realized, and the user experience is improved.
The steps in the embodiment of the method for controlling playing of a real-time video when the computer program is executed by the processor may refer to the description of the first embodiment, and are not repeated herein.
The computer readable storage medium of the embodiments of the present invention may include any entity or device capable of carrying computer program code, a recording medium, such as a ROM/RAM, a magnetic disk, an optical disk, a flash memory, or the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A playing control method of a real-time video is characterized by comprising the following steps:
monitoring the transmission speed of a real-time video frame being played;
when the transmission speed is lower than a preset transmission speed, monitoring the cached video frames in the play queue;
when the frame number of the cached video frame is monitored to be continuously reduced, reducing the number of the cached video frame played in unit time;
when monitoring that the number of the cached video frame frames is continuously increased or the number of the video frame frames which can be cached in the play queue is continuously maintained, increasing the number of the cached video frame frames played in unit time;
after the step of monitoring the buffered video frames of the play queue, the method further comprises:
when monitoring that the number of the cached video frame frames is lower than a preset frame number, increasing the number of the video frame frames which can be cached, and pausing the playing of the cached video frames;
after the preset caching duration, resuming playing the cached video frame;
after the step of pausing the playing of the cached video frame and before the step of resuming the playing of the cached video frame, the method further comprises:
the preset buffer duration is obtained through a formula T-N × Gop/frame + (T-1/frame)/M, where T is the preset buffer duration, N, M is a constant, the N, M is set according to the network transmission speed when the playing is paused, Gop is the number of the cacheable video frames, T is the actual transmission duration difference of adjacent video frames in the video frame I frame, and frame is the video frame rate.
2. The method of claim 1, wherein the method further comprises:
and when the transmission speed is not less than the preset transmission speed, increasing the number of the buffered video frames played in unit time.
3. A playback control apparatus for real-time video, the apparatus comprising:
the speed monitoring unit is used for monitoring the transmission speed of the real-time video frame which is being played;
the video frame monitoring unit is used for monitoring the cached video frames in the play queue when the transmission speed is less than the preset transmission speed;
a frame number reducing unit, configured to reduce the number of buffered video frames played in a unit time when it is monitored that the number of buffered video frames is continuously reduced; and
a first increasing unit, configured to increase the number of buffered video frames played in a unit time when it is monitored that the number of buffered video frames continuously increases or the number of buffered video frames continuously remains in the play queue;
the device further comprises:
the pause playing unit is used for increasing the number of the video frames which can be cached and pausing the playing of the cached video frames when the number of the cached video frames is monitored to be lower than the preset number of frames; and
the recovery playing unit is used for recovering and playing the cached video frame after the preset caching duration;
a duration obtaining unit, configured to obtain the preset buffer duration through a formula T ═ N × Gop/frame + (T-1/frame)/M, where N, M is a constant, the N, M is set according to a network transmission speed when the playing is paused, Gop is the number of the cacheable video frames, T is an actual transmission duration difference of adjacent video frames in the video frame I frame, and frame is a video frame rate.
4. The apparatus of claim 3, wherein the apparatus further comprises:
and the second increasing unit is used for increasing the number of the buffered video frame played in unit time when the transmission speed is not less than the preset transmission speed.
5. A video playback terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1 to 2 are implemented when the computer program is executed by the processor.
6. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 2.
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| CN111918093B (en) * | 2020-08-13 | 2021-10-26 | 腾讯科技（深圳）有限公司 | Live broadcast data processing method and device, computer equipment and storage medium |
| CN112188284B (en) * | 2020-10-23 | 2022-10-04 | 武汉长江通信智联技术有限公司 | Client low-delay smooth playing method based on wireless video monitoring system |
| CN113271496B (en) * | 2021-07-15 | 2021-10-01 | 全时云商务服务股份有限公司 | Video smooth playing method and system in network live broadcast and readable storage medium |
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