CN112866728A - Streaming media live broadcast method and system capable of supporting multiple code rates - Google Patents
Streaming media live broadcast method and system capable of supporting multiple code rates Download PDFInfo
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- CN112866728A CN112866728A CN202011540032.2A CN202011540032A CN112866728A CN 112866728 A CN112866728 A CN 112866728A CN 202011540032 A CN202011540032 A CN 202011540032A CN 112866728 A CN112866728 A CN 112866728A
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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
- H04N21/2187—Live feed
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234309—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
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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
- H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
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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
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
Abstract
The method and the system for supporting the multi-code-rate live streaming media provided by the application acquire a first video stream and a target request sent by a streaming media server through a recoding server; the first video stream is a high-bit-rate video stream in a streaming media server; according to the target request, the first video stream is re-encoded into a second video stream, and the second video stream is one of the re-encoded video streams with different code rates; and sending the second video stream to the streaming media server. Under the condition that the front end is not changed, the video streams with different code rates are increased by utilizing the recoding server, so that the front end can see the best video picture which can be matched even when the network environment is not good. In addition, the method and the system do not couple new functions to the original streaming media server, so that the streaming media server is single in function and convenient to maintain in the later period. In addition, the original framework is not changed, and the development efficiency can be effectively improved.
Description
Technical Field
The present application relates to the field of network technologies, and in particular, to a method and a system for supporting multi-rate streaming media live broadcast.
Background
39 original uplink high-definition and fuzzy two-path video streams of a video room of an ipad end or a pc end of a doctor workstation, after multiple ends enter the same video room, the network speed of each client is inconsistent, a streaming media server (PVS) forwards the streaming media video streams with different code rates according to the downlink network speed of each client, the high-definition path video is forwarded when the downlink network speed is more than 800kb/s, and the fuzzy one-path video is forwarded when the network speed is less than 800 kb/s. Because some clients have poor network speed environment, only fuzzy-path videos can be received in a video room, the display effect of the fuzzy-path videos is poor, and the pictures are fuzzy.
Disclosure of Invention
The application provides a streaming media live broadcast method and system capable of supporting multiple code rates, and aims to solve the problems that a picture is blocked or blurred in the existing live broadcast process.
In a first aspect, to achieve the above object, the present application provides a method for supporting live streaming media with multiple code rates, where the method includes:
the recoding server acquires a first video stream and a target request sent by the streaming media server; the first video stream is a high-bit-rate video stream in a streaming media server;
the recoding server recodes the first video stream into a second video stream according to the target request, wherein the second video stream is one of recoded video streams with different code rates;
and the recoding server sends the second video stream to the streaming media server.
Further, the method for live streaming media capable of supporting multiple code rates further includes:
the streaming media server acquires the second video stream;
the streaming media server acquires the network speed of a target client;
and sending the matched target video stream according to the network speed of the target client.
Further, the re-encoding server re-encodes the first video stream into a second video stream according to the target request, including:
decoding the first video stream to obtain a first video stream data packet, wherein the first video stream data packet is in a YUV format;
cutting the first video stream data packet according to the target request;
and cutting the first video stream data packet and recoding to obtain a second video stream data packet.
Further, after the streaming media server obtains the second video stream, the method further includes:
buffering the second video stream.
Further, the second video stream is transmitted to the streaming media server by the recoding conversion server through an Rtp protocol.
In a second aspect, to achieve the above object, the present application provides a streaming media live broadcast system capable of supporting multiple code rates, where the system includes: the system comprises a first front end, a second front end, a streaming media server and a recoding server; the first front end and the second front end are respectively connected with the streaming media server, and the streaming media server is also connected with the recoding server;
the recoding server is configured to:
acquiring a first video stream and a target request sent by a streaming media server; the first video stream is a high-bit-rate video stream in a streaming media server;
according to the target request, the first video stream is re-encoded into a second video stream, and the second video stream is one of the re-encoded video streams with different code rates;
and sending the second video stream to the streaming media server.
Further, the streaming media server is configured to:
acquiring the second video stream;
acquiring the network speed of a target client;
and sending the matched target video stream according to the network speed of the target client.
Further, the re-encoding server is configured to re-encode the first video stream into a second video stream according to the target request, and includes:
decoding the first video stream to obtain a first video stream data packet, wherein the first video stream data packet is in a YUV format;
cutting the first video stream data packet according to the target request;
and cutting the first video stream data packet and recoding to obtain a second video stream data packet.
Further, after the streaming media server is configured to obtain the second video stream, the streaming media server is further configured to:
buffering the second video stream.
Further, the second video stream is transmitted to the streaming media server by the recoding conversion server through an Rtp protocol.
In a third aspect, to achieve the above object, the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the streaming media live broadcast method capable of supporting multiple code rates in any one of the first aspect.
In a fourth aspect, to achieve the above object, the present application provides a computer device, 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 method for supporting live streaming media with multiple code rates in any one of the first aspect when executing the program.
According to the technical scheme, the streaming media live broadcast method and system capable of supporting the multi-code rate, which are provided by the embodiment of the application, are characterized in that a first video stream and a target request sent by a streaming media server are obtained through a recoding server; the first video stream is a high-bit-rate video stream in a streaming media server; the recoding server recodes the first video stream into a second video stream according to the target request, wherein the second video stream is one of recoded video streams with different code rates; the recoding server sends the second video stream to the streaming media server; the streaming media server acquires the second video stream; the streaming media server acquires the network speed of a target client; and sending the matched target video stream according to the network speed of the target client. Under the condition that the front end is not changed, the video streams with different code rates are increased by utilizing the recoding server, so that the front end can see the best video picture which can be matched even when the network environment is not good. In addition, the method and the system do not couple new functions to the original streaming media server, so that the streaming media server is single in function and convenient to maintain in the later period. In addition, the original framework is not changed, and the development efficiency can be effectively improved.
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 application.
Drawings
In order to more clearly describe the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic flowchart of a streaming media live broadcast method capable of supporting multiple code rates according to a first embodiment of the present application;
fig. 2 is a schematic flowchart of a streaming media live broadcast method capable of supporting multiple code rates according to a second embodiment of the present application;
fig. 3 is a timing diagram of a streaming media live broadcast method capable of supporting multiple code rates according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a streaming media live broadcast system capable of supporting multiple code rates according to an embodiment of the present application.
Detailed Description
The features and advantages of the present application will become more apparent and appreciated from the following detailed description of the application.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left" and "right" and the like indicate orientations or positional relationships based on operational states of the present application, and are only used for convenience of description and simplification of description, but do not indicate or imply that the system or element being referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The applicant finds that 39 an original streaming media system of a doctor workstation only supports a high-definition video stream and a fuzzy video stream, if a front end needs to play the high-definition video stream, at least 800kb/s is needed for a downlink band library of a current network, and network bandwidths of some client ends are not up to 800kb/s due to different network environments, a streaming media server (PVS) can send the fuzzy video stream to the front end, and if the high-definition video stream is pushed down forcibly, the video picture is blocked and pause due to the fact that the network bandwidth of the front end is low.
If the front end uploads one more smooth video stream, the front end needs to upload three video streams simultaneously, and the later stage may need one more video stream clearer than smooth or a video stream with blurry image quality than smooth, or even more.
In the original system, a client uploads two paths of high-definition and fuzzy videos, and also uploads one path of smooth video stream to realize the function, so that all the clients need to be upgraded, and the client uploads three paths of high-definition, smooth and fuzzy video streams at the same time has certain pressure on the current network bandwidth.
To solve the above problem, the present application provides a streaming media live broadcast method capable of supporting multiple code rates, fig. 1 is a schematic flow diagram of a streaming media live broadcast method capable of supporting multiple code rates according to a first embodiment of the present application, and as shown in fig. 1, the method includes steps S101 to S103.
S101: the recoding server acquires a first video stream and a target request sent by the streaming media server; the first video stream is a high-bit-rate video stream in a streaming media server.
39 after a user of a doctor workstation enters a streaming media live broadcast room, a camera acquires video streaming media YUV data, high definition path video streams and fuzzy path video streams are respectively coded, and then high definition and fuzzy path video streams are uploaded to a streaming media server (PVS) through an Rtp protocol, wherein the streaming media server can cache the high definition and fuzzy video streams so as to retransmit the media data and ensure the smoothness of a front-end display picture under the condition of packet loss of streaming media transmitted to other clients. After caching, the media server forwards the high-definition video stream to a re-encoding server (RCS) through the Rtp.
The method includes that a recoding server receives a first video stream and a target request sent by a streaming media server, the first video stream is a high-bitrate video stream in the streaming media server, the target request is a bitrate which is achieved after the first video stream is recoded, for example, the first video stream is 600kbps, the target request is recoded to 300kbps, or the target request further comprises a 200kbps video stream which is one level lower, and the specific target request is determined according to the conditions of a CPU and a memory, and may be one or more.
S102: and the recoding server recodes the first video stream into a second video stream according to the target request, wherein the second video stream is one of recoded video streams with different code rates.
The re-encoding server re-encodes the first video stream after decoding the first video stream according to the target request, and specifically includes:
s201: decoding the first video stream to obtain a first video stream data packet, wherein the first video stream data packet is in a YUV format;
s202: cutting the first video stream data packet according to the target request;
s203: and cutting the first video stream data packet and recoding to obtain a second video stream.
And the recoding server decodes the video after receiving the streaming media data, decodes the first video stream into original video YUV format data, namely a first video stream data packet, cuts the video stream according to the video size of the resolution requested by the target, reduces the coding rate and recodes the video stream. For example, if the first video stream is 600kbps and the target requests are re-encoded into 300kbps and 200kbps video streams, the first video stream data packet is cut into 300kbps and 200kbps respectively according to the target requests after the first video stream of 600kbps is decoded, and then the encoding rate is reduced, and re-encoding is performed to obtain a second video stream of 300kbps and a third video stream of 200kbps respectively. And the recoding server sends the second video stream and the third video stream to the streaming media server through an Rtp protocol.
Fig. 2 is a flowchart illustrating a streaming media live broadcast method capable of supporting multiple code rates according to a second embodiment of the present application, and as shown in fig. 2, in a specific implementation, the streaming media live broadcast method capable of supporting multiple code rates further includes steps S104 to S106.
S104: and the streaming media server acquires the second video stream.
In specific implementation, after receiving the second video stream and the third video stream sent by the re-encoding server, the streaming media server caches the second video stream and the third video stream so as to facilitate packet loss retransmission.
S105: and the streaming media server acquires the network speed of the target client.
In a specific implementation, the streaming media server may detect the front-end network speed before or after acquiring the second video stream.
S106: and sending the matched target video stream according to the network speed of the target client.
When the method is implemented specifically, the streaming media server detects that the network speed of the front end is below 100kb/s, the fuzzy path video stream can be issued; the front-end network speed sends down a smooth video stream at 100kb/s-800kb/s, such as a second video stream of 300kbps or a third video stream of 200 kbps; when the front-end network speed is larger than or equal to 800kb/s, sending down high clear path video, such as a first video stream of 600 kbps. In addition, the recoding server can recode the video stream with multiple code rates, so that the phenomenon of black screen or blockage when the network speed of the front end is poor is avoided, and the front end can see the best video image quality at the current network speed.
The streaming media server also has a cache mechanism, and if the network speed of the front end is worse and packet loss occurs, the streaming media server retransmits the lost picture to the front end. In addition, the recoding server can also cut the high-definition video uploaded by the streaming media server into small pictures and then transmit the small pictures to the front end. If the width and height of the video transmitted to the streaming media server from the front end is 1280 × 720, the recoding server cuts the video into 720 × 480, so that each time a picture is transmitted, less bandwidth is occupied, and the front end sees a video smaller than the original picture.
Fig. 3 is a timing diagram of a streaming media live broadcast method capable of supporting multiple code rates according to an embodiment of the present application. The method and the device utilize a recoding server (RCS) to modify a streaming media server (PVS) to support the issuing of a smooth video stream without changing a front end. In addition, the high-definition channel video is not selected to be directly re-encoded into the smooth channel video by the streaming media server (PVS), because the streaming media server (PVS) mainly has the function of forwarding the video stream in the room, and the server is kept to be single in function and decoupled in function, so that the later maintenance can be facilitated.
Corresponding to the embodiment of the streaming media live broadcast method capable of supporting multiple code rates provided by the application, the application also provides an embodiment of a streaming media live broadcast system capable of supporting multiple code rates. Referring to fig. 4, a schematic structural diagram of a streaming media live broadcast system capable of supporting multiple code rates according to an embodiment of the present application is provided, where the system includes:
the system comprises a first front end 1, a second front end 2, a streaming media server 3 and a recoding server 4; the first front end 1 and the second front end 2 are respectively connected with the streaming media server 3, and the streaming media server 3 is further connected with the recoding server 4;
the recoding server 4 is configured to:
acquiring a first video stream and a target request sent by a streaming media server; the first video stream is a high-bit-rate video stream in a streaming media server;
according to the target request, the first video stream is re-encoded into a second video stream, and the second video stream is one of the re-encoded video streams with different code rates;
and sending the second video stream to the streaming media server.
Further, the streaming media server 3 is configured to:
acquiring the second video stream;
acquiring the network speed of a target client;
and sending the matched target video stream according to the network speed of the target client.
Further, the re-encoding server 4 is configured to re-encode the first video stream into a second video stream according to the target request, and includes:
decoding the first video stream to obtain a first video stream data packet, wherein the first video stream data packet is in a YUV format;
cutting the first video stream data packet according to the target request;
and cutting the first video stream data packet and recoding to obtain a second video stream data packet.
Further, after the streaming media server 3 is configured to obtain the second video stream, it is further configured to:
buffering the second video stream.
Further, the second video stream is transmitted to the streaming media server by the recoding conversion server through an Rtp protocol.
The method and the system for supporting the multi-code-rate live streaming media provided by the embodiment of the application acquire a first video stream and a target request sent by a streaming media server through a recoding server; the first video stream is a high-bit-rate video stream in a streaming media server; the recoding server recodes the first video stream into a second video stream according to the target request, wherein the second video stream is one of recoded video streams with different code rates; the recoding server sends the second video stream to the streaming media server; the streaming media server acquires the second video stream; the streaming media server acquires the network speed of a target client; and sending the matched target video stream according to the network speed of the target client. Under the condition that the front end is not changed, the video streams with different code rates are increased by utilizing the recoding server, so that the front end can see the best video picture which can be matched even when the network environment is not good. In addition, the method and the system do not couple new functions to the original streaming media server, so that the streaming media server is single in function and convenient to maintain in the later period. In addition, the original framework is not changed, and the development efficiency can be effectively improved.
According to the streaming media live broadcast method capable of supporting multiple code rates, the embodiment of the application also provides a readable storage medium and computer equipment. The readable storage medium stores executable program, and the program realizes the steps of the streaming media live broadcast method capable of supporting multi-code rate when being executed by the processor; the computer equipment comprises a memory, a processor and an executable program which is stored on the memory and can run on the processor, and the processor realizes the steps of the streaming media live broadcast method capable of supporting the multi-code rate when executing the program.
The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.
Claims (10)
1. A method for supporting multi-code rate live streaming media, the method comprising:
the recoding server acquires a first video stream and a target request sent by the streaming media server; the first video stream is a high-bit-rate video stream in a streaming media server;
the recoding server recodes the first video stream into a second video stream according to the target request, wherein the second video stream is one of recoded video streams with different code rates;
and the recoding server sends the second video stream to the streaming media server.
2. The method for supporting live streaming media with multiple code rates as claimed in claim 1, wherein the method further comprises:
the streaming media server acquires the second video stream;
the streaming media server acquires the network speed of a target client;
and sending the matched target video stream according to the network speed of the target client.
3. The method of claim 1, wherein the re-encoding server re-encodes the first video stream into a second video stream according to the target request, and comprises:
decoding the first video stream to obtain a first video stream data packet, wherein the first video stream data packet is in a YUV format;
cutting the first video stream data packet according to the target request;
and cutting the first video stream data packet and recoding to obtain a second video stream data packet.
4. The method of claim 1, wherein after the streaming media server obtains the second video stream, the method further comprises:
buffering the second video stream.
5. The method of claim 4, wherein the second video stream is transmitted to the streaming media server by a re-encoding conversion server through an Rtp protocol.
6. A streaming media live broadcast system capable of supporting multiple code rates, the system comprising: the system comprises a first front end, a second front end and a streaming media server, and is characterized by also comprising a recoding server; the first front end and the second front end are respectively connected with the streaming media server, and the streaming media server is also connected with the recoding server;
the recoding server is configured to:
acquiring a first video stream and a target request sent by a streaming media server; the first video stream is a high-bit-rate video stream in a streaming media server;
according to the target request, the first video stream is re-encoded into a second video stream, and the second video stream is one of the re-encoded video streams with different code rates;
and sending the second video stream to the streaming media server.
7. The system of claim 6, wherein the streaming server is configured to:
acquiring the second video stream;
acquiring the network speed of a target client;
and sending the matched target video stream according to the network speed of the target client.
8. The streaming media live broadcasting system capable of supporting multiple code rates of claim 6, wherein the recoding server is configured to recode the first video stream into a second video stream according to the target request, and comprises:
decoding the first video stream to obtain a first video stream data packet, wherein the first video stream data packet is in a YUV format;
cutting the first video stream data packet according to the target request;
and cutting the first video stream data packet and recoding to obtain a second video stream data packet.
9. The system of claim 6, wherein after the streaming server is configured to obtain the second video stream, the streaming server is further configured to:
buffering the second video stream.
10. The multi-rate-capable streaming media live broadcasting system of claim 9, wherein the second video stream is transmitted to the streaming media server by the re-encoding conversion server through an Rtp protocol.
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