CN111010603A - Video caching and forwarding processing method and device - Google Patents
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- CN111010603A CN111010603A CN201911312856.1A CN201911312856A CN111010603A CN 111010603 A CN111010603 A CN 111010603A CN 201911312856 A CN201911312856 A CN 201911312856A CN 111010603 A CN111010603 A CN 111010603A
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- 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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
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Abstract
The invention provides a video cache forwarding processing method and a device, wherein the method comprises the following steps: receiving a video request message sent by a client; creating a session cache queue for the client according to the video request message, and copying video data cached in the media source cache queue to the session cache queue, wherein the video data at least comprises a key frame or a key frame and N non-key frames; the video data containing the key frame in the session cache queue is sent to the client, so that the problem that a static picture with one GOP duration may occur or a screen is scrambled due to the fact that a current video data stream is a discontinuous non-key frame because only one key frame is cached in the related technology can be solved.
Description
Technical Field
The invention relates to the field of video processing, in particular to a video caching and forwarding processing method and device.
Background
In some scenes for acquiring video data in real time, such as live broadcasting or monitoring, the server acquires video data streams from the video acquisition device in real time. The user can watch the real-time video through the client of the mobile phone, the tablet computer, the computer and the like.
The specific process can comprise the following steps: the client sends a URL (Uniform Resource Locator) request to the server, and the server establishes connection with the client after verifying that the client is legal. After the connection is established, the server may send the client-requested real-time video data stream to the client.
Video data is generally composed Of a plurality Of GOPs (Group Of pictures), and a GOP includes an I frame (intra Picture frame, key frame) and other data frames decoded by the I frame after the I frame. Therefore, when the server sends the real-time video data stream to the client, the server needs to wait until an I frame appears in the video data stream to start data transmission, so that it can be ensured that other data frames after the I frame can be decoded and played normally. In a video coding sequence, there are mainly three types of coded frames: the video coding method comprises I frames, P frames and B frames, wherein the I frames are Intra-coded picture frames, do not refer to other image frames, and are coded only by using the information of the frame; a P frame (Predictive-coded Picture frame) which is used for inter-frame Predictive coding by adopting a motion prediction mode by utilizing the previous I frame or P frame; the B frame, i.e. bidirectional predictive coded image frame, provides the highest compression ratio, requires both the previous image frame (I frame or P frame) and the subsequent image frame (P frame), and performs inter-frame bidirectional predictive coding by using motion prediction.
The related technology provides a real-time video transmission and playing method, after receiving a video request sent by a client, a server sends a cached current I frame and an obtained current video data stream to the client; the client decodes and plays the data frame before the first I frame in the current data stream according to the current I frame, and the phenomenon of screen blacking cannot occur. Since only one I frame is buffered, there exists a GOP-long still picture in the worst case, and there may be a screen splash phenomenon of a messy code on the screen due to no consecutive P frames.
No solution has been proposed yet to the problem in the related art that a GOP-long still picture may occur due to only one key frame being buffered, or a screen may have a scrambling code due to a current video data stream being a discontinuous non-key frame.
Disclosure of Invention
The embodiment of the invention provides a video caching forwarding processing method and a video caching forwarding processing device, which are used for at least solving the problem that in the related technology, as only one key frame is cached, a static picture with a GOP (group of pictures) duration may appear or a screen has messy codes due to the fact that a current video data stream is a discontinuous non-key frame.
According to an embodiment of the present invention, a video caching and forwarding processing method is provided, including:
receiving a video request message sent by a client;
creating a session cache queue for the client according to the video request message, and copying video data cached in the media source cache queue to the session cache queue, wherein the video data at least comprises a key frame, or a key frame and N non-key frames, and N is an integer greater than or equal to 1;
and sending the video data containing the key frame in the session buffer queue to the client.
Optionally, sending the video data containing the key frame in the session buffer queue to the client includes:
sending the key frame in the video data in the session cache queue to the client;
and sending non-key frames after the key frames in the video data to the client according to the sequence of the cache.
Optionally, sending, to the client, non-key frames after the key frame in the video data according to the sequence of the cache includes:
for each received video frame, performing the following operations:
judging whether the video frame is a key frame;
and under the condition that the video frames are non-key frames, sending non-key frames behind the key frames in the video data to the client according to the sequence of the cache.
Optionally, the method further comprises:
and caching the video frames to the media source cache queue and the tail of the session cache queue while sending non-key frames after the key frames in the video data to the client according to the caching sequence.
Optionally, the method further comprises:
emptying the media source cache queue and the session cache queue under the condition that the video frame is a key frame;
and caching the video frames into the media source cache queue and the session cache queue, and sending the video frames to the client.
According to another embodiment of the present invention, there is also provided a video caching and forwarding processing apparatus, including:
the receiving module is used for receiving a video request message sent by a client;
a creating module, configured to create a session cache queue for the client according to the video request message, and copy video data cached in the media source cache queue to the session cache queue, where the video data at least includes one key frame, or one key frame and N non-key frames, and N is an integer greater than or equal to 1;
and the sending module is used for sending the video data containing the key frames in the session buffer queue to the client.
Optionally, the sending module includes:
a first sending submodule, configured to send the key frame in the video data in the session buffer queue to the client;
and the second sending submodule is used for sending the non-key frames after the key frames in the video data to the client according to the sequence of the cache.
Optionally, the second sending submodule includes:
an execution unit configured to, for each received video frame, perform the following operations:
judging whether the video frame is a key frame;
and under the condition that the video frames are non-key frames, sending non-key frames behind the key frames in the video data to the client according to the sequence of the cache.
Optionally, the apparatus further comprises:
and the buffer sub-module is used for buffering the video frames to the media source buffer queue and the tail of the session buffer queue while sending the non-key frames after the key frames in the video data to the client according to the sequence of the buffer.
Optionally, the apparatus further comprises:
the emptying submodule is used for emptying the media source cache queue and the session cache queue under the condition that the video frame is a key frame;
and the third sending submodule is used for caching the video frame into the media source cache queue and the session cache queue and sending the video frame to the client.
According to a further embodiment of the present invention, a computer-readable storage medium is also provided, in which a computer program is stored, wherein the computer program is configured to perform the steps of any of the above-described method embodiments when executed.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.
According to the invention, a video request message sent by a client is received; creating a session cache queue for the client according to the video request message, and copying video data cached in the media source cache queue to the session cache queue, wherein the video data at least comprises a key frame or a key frame and N non-key frames; the video data containing the key frames in the session cache queue is sent to the client, so that the problem that a static picture with one GOP duration may occur or a screen is disordered due to discontinuous non-key frames of a current video data stream because only one key frame is cached in the related technology can be solved, the delay of the initial opening of the video is avoided through the double-cache design of the media source session cache queue and the session cache queue, the fluency of the initial opening video is ensured, and the static picture or the disordered code cannot occur.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a block diagram of a hardware structure of a mobile terminal of a video caching and forwarding processing method according to an embodiment of the present invention;
fig. 2 is a flowchart of a video cache forwarding processing method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a media forwarding system according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a buffer queue status at the time of buffer deletion according to an embodiment of the present invention;
FIG. 5 is a flow diagram of cache sending when a client initiates a pull stream, according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a video data cache and client request pull according to the present invention;
fig. 7 is a block diagram of a video cache forwarding processing apparatus according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Example 1
The method provided by the first embodiment of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking a mobile terminal as an example, fig. 1 is a hardware structure block diagram of a mobile terminal of a video caching and forwarding processing method according to an embodiment of the present invention, as shown in fig. 1, a mobile terminal 10 may include one or more processors 102 (only one is shown in fig. 1) (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), and a memory 104 for storing data, and optionally, the mobile terminal may further include a transmission device 106 for a communication function and an input/output device 108. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration, and does not limit the structure of the mobile terminal. For example, the mobile terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to the message receiving method in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, so as to implement the method described above. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal 10. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
In this embodiment, a video caching and forwarding processing method operating in the mobile terminal or the network architecture is provided, and fig. 2 is a flowchart of the video caching and forwarding processing method according to the embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S202, receiving a video request message sent by a client;
step S204, creating a session cache queue for the client according to the video request message, and copying video data cached in the media source cache queue to the session cache queue, wherein the video data at least comprises a key frame, or a key frame and N non-key frames, and N is an integer greater than or equal to 1;
step S206, sending the video data containing the key frame in the session buffer queue to the client.
Receiving a video request message sent by the client through the steps S202 to S206; creating a session cache queue for the client according to the video request message, and copying video data cached in the media source cache queue to the session cache queue, wherein the video data at least comprises a key frame or a key frame and N non-key frames; the video data containing the key frames in the session cache queue is sent to the client, so that the problem that a static picture with one GOP duration may occur or a screen is disordered due to discontinuous non-key frames of a current video data stream because only one key frame is cached in the related technology can be solved, the delay of the initial opening of the video is avoided through the double-cache design of the media source session cache queue and the session cache queue, the fluency of the initial opening video is ensured, and the static picture or the disordered code cannot occur.
In an embodiment of the present invention, the step S206 may specifically include:
s2061, sending the key frame in the video data in the session cache queue to the client;
s2062, sending the non-key frames after the key frame in the video data to the client according to the sequence of the cache, and further, for each received video frame, performing the following operations:
judging whether the video frame is a key frame, namely judging whether the video frame is an I frame;
and under the condition that the video frame is a non-key frame, sending the non-key frame behind the key frame in the video data to the client according to the sequence of the cache, wherein the non-key frame, namely the non-I frame, can be a P frame or a B frame.
In an optional embodiment, while sending non-key frames following the key frame in the video data to the client according to the sequence of buffering, the video frame is buffered to the media source buffer queue and the tail of the session buffer queue.
In another optional embodiment, in a case that the video frame is a key frame, emptying the media source buffer queue and the session buffer queue; and caching the video frames into the media source cache queue and the session cache queue, and sending the video frames to the client.
Fig. 3 is a schematic diagram of a media forwarding system according to an embodiment of the present invention, as shown in fig. 3, the media forwarding system includes a media source session and a client session, and creates a media source buffer queue for the media source session and a client buffer queue (corresponding to the session buffer queue) for the client session, where the media source buffer queue provides the media source buffer queue with configurable buffer length, and the client buffer queue is responsible for buffering a data frame to be sent by a client when the client session is created.
The media forwarding system receives the media source data and adds the media data into the media source cache queue according to a cache policy, wherein the cache policy comprises: judging whether the current media frame is an I frame, if so, emptying the media source cache queue; fig. 4 is a schematic diagram of a buffer queue state during buffer deletion according to an embodiment of the present invention, and as shown in fig. 4, the buffer duration is configured to be 1 GOP, and the buffer queue state during buffer deletion is used to place media data into a media source buffer queue.
Fig. 5 is a flowchart of cache sending when a client initiates a pull stream according to an embodiment of the present invention, and as shown in fig. 5, the flowchart includes:
step S501, a client requests to forward media data of a specified media source;
step S502, the media forwarding system creates a client session buffer queue and copies the media buffer queue to the session buffer queue, and particularly can prevent extra overhead generated by copying through modes including but not limited to reference counting, intelligent pointers and the like;
step S503, sending the first key frame in the queue to the client, and ensuring that the client can render in time;
step S504, the media forwarding system receives the media source data;
step S505, determining whether the media data is a key frame, if yes, executing step S506, otherwise executing step S507;
step S506, emptying a client session cache queue;
step S507, the received media source data is put into the tail of the session buffer queue;
step S508, the first data frame in the swap buffer queue is sent to the client.
Fig. 6 is a schematic diagram of a video data buffer and a client request pull stream according to the present invention, as shown in fig. 6, when a media forwarding system receives a data frame P5, the client requests a pull stream, at this time, a session buffer queue is created for the client, video data (including I frame, P1 frame, P2 frame, P3 frame, and P4 frame) buffered before in the media source buffer queue is copied into the session buffer queue, it is determined whether the received data frame is a key frame, since the received data frame is a P5 frame, i.e. a non-key frame, a P5 frame is buffered into the media source buffer queue and the session buffer queue, the I frame is sent to the client, then the media forwarding system further receives P6 frame, P7 frame, P8 frame, and P9 frame in the same manner as the above P5 frame, and then sends P1 frame, P2 frame, P3 frame, P4 frame to the client in turn, until I2 frame, the video data buffer queue and the media source buffer queue are emptied, and want the customer end to send the I2 frame, as for the customer end, have received I frame, P1 frame, P2 frame, P3 frame, P4 frame, can receive I frame data that the platform buffers in time, and can play smoothly, when the platform receives the buffer after the second I frame of media source and sends the tactics, also guarantee the real-time property of the customer end.
The embodiment of the invention solves the problem of time delay when the video is first opened by double-cache design of the media source and the conversation of the client, and ensures the fluency of the first opened video. And through a sending strategy of the client session cache, the fluency of the picture is ensured by sending the queue head data of the client session cache queue. When an I frame of a media source is received, the original client session cache is discarded, the encoding and decoding computing resources are not required to be consumed additionally, and the real-time performance of video forwarding is ensured.
Example 2
According to another embodiment of the present invention, there is also provided a video buffering and forwarding processing apparatus, and fig. 7 is a block diagram of the video buffering and forwarding processing apparatus according to the embodiment of the present invention, as shown in fig. 7, including:
a receiving module 72, configured to receive a video request message sent by a client;
a creating module 74, configured to create a session cache queue for the client according to the video request message, and copy the video data cached in the media source cache queue to the session cache queue, where the video data at least includes one key frame, or one key frame and N non-key frames, and N is an integer greater than or equal to 1;
a sending module 76, configured to send the video data in the session buffer queue, which includes the key frame, to the client.
Optionally, the sending module 76 includes:
a first sending submodule, configured to send the key frame in the video data in the session buffer queue to the client;
and the second sending submodule is used for sending the non-key frames after the key frames in the video data to the client according to the sequence of the cache.
Optionally, the second sending submodule includes:
an execution unit configured to, for each received video frame, perform the following operations:
judging whether the video frame is a key frame;
and under the condition that the video frames are non-key frames, sending non-key frames behind the key frames in the video data to the client according to the sequence of the cache.
Optionally, the apparatus further comprises:
and the buffer sub-module is used for buffering the video frames to the media source buffer queue and the tail of the session buffer queue while sending the non-key frames after the key frames in the video data to the client according to the sequence of the buffer.
Optionally, the apparatus further comprises:
the emptying submodule is used for emptying the media source cache queue and the session cache queue under the condition that the video frame is a key frame;
and the third sending submodule is used for caching the video frame into the media source cache queue and the session cache queue and sending the video frame to the client.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Example 3
Embodiments of the present invention also provide a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to perform the steps of any of the above method embodiments when executed.
Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:
s1, receiving a video request message sent by a client;
s2, creating a session buffer queue for the client according to the video request message, and copying the video data buffered in the media source buffer queue to the session buffer queue, wherein the video data at least comprises a key frame, or a key frame and N non-key frames, and N is an integer greater than or equal to 1;
s3, sending the video data containing the key frame in the session buffer queue to the client.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Example 4
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:
s1, receiving a video request message sent by a client;
s2, creating a session buffer queue for the client according to the video request message, and copying the video data buffered in the media source buffer queue to the session buffer queue, wherein the video data at least comprises a key frame, or a key frame and N non-key frames, and N is an integer greater than or equal to 1;
s3, sending the video data containing the key frame in the session buffer queue to the client.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A video caching and forwarding processing method is characterized by comprising the following steps:
receiving a video request message sent by a client;
creating a session cache queue for the client according to the video request message, and copying video data cached in the media source cache queue to the session cache queue, wherein the video data at least comprises a key frame, or a key frame and N non-key frames, and N is an integer greater than or equal to 1;
and sending the video data containing the key frame in the session buffer queue to the client.
2. The method of claim 1, wherein sending the video data containing the key frame in the session buffer queue to the client comprises:
sending the key frame in the video data in the session cache queue to the client;
and sending non-key frames after the key frames in the video data to the client according to the sequence of the cache.
3. The method of claim 2, wherein sending non-key frames following the key frame in the video data to the client in the order of the buffered priority comprises:
for each received video frame, performing the following operations:
judging whether the video frame is a key frame;
and under the condition that the video frames are non-key frames, sending non-key frames behind the key frames in the video data to the client according to the sequence of the cache.
4. The method of claim 3, further comprising:
and caching the video frames to the media source cache queue and the tail of the session cache queue while sending non-key frames after the key frames in the video data to the client according to the caching sequence.
5. The method of claim 3, further comprising:
emptying the media source cache queue and the session cache queue under the condition that the video frame is a key frame;
and caching the video frames into the media source cache queue and the session cache queue, and sending the video frames to the client.
6. A video buffering and forwarding processing apparatus, comprising:
the receiving module is used for receiving a video request message sent by a client;
a creating module, configured to create a session cache queue for the client according to the video request message, and copy video data cached in the media source cache queue to the session cache queue, where the video data at least includes one key frame, or one key frame and N non-key frames, and N is an integer greater than or equal to 1;
and the sending module is used for sending the video data containing the key frames in the session buffer queue to the client.
7. The apparatus of claim 6, wherein the sending module comprises:
a first sending submodule, configured to send the key frame in the video data in the session buffer queue to the client;
and the second sending submodule is used for sending the non-key frames after the key frames in the video data to the client according to the sequence of the cache.
8. The apparatus of claim 7, wherein the second transmit submodule comprises:
an execution unit configured to, for each received video frame, perform the following operations:
judging whether the video frame is a key frame;
and under the condition that the video frames are non-key frames, sending non-key frames behind the key frames in the video data to the client according to the sequence of the cache.
9. A computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to carry out the method of any one of claims 1 to 5 when executed.
10. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 5.
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| CN112104893A (en) * | 2020-11-04 | 2020-12-18 | 武汉中科通达高新技术股份有限公司 | Video stream management method and device for realizing plug-in-free playing of webpage end |
| CN112600815A (en) * | 2020-12-08 | 2021-04-02 | 努比亚技术有限公司 | Video display method, terminal and computer readable storage medium |
| CN113905196A (en) * | 2021-08-30 | 2022-01-07 | 浙江大华技术股份有限公司 | Video frame management method, video recorder and computer readable storage medium |
| CN113965714A (en) * | 2021-09-10 | 2022-01-21 | 北京百度网讯科技有限公司 | Video stream processing method and device, electronic equipment and storage medium |
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