CN110022297A - A kind of HD video live broadcast system - Google Patents
A kind of HD video live broadcast system Download PDFInfo
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- CN110022297A CN110022297A CN201910157609.2A CN201910157609A CN110022297A CN 110022297 A CN110022297 A CN 110022297A CN 201910157609 A CN201910157609 A CN 201910157609A CN 110022297 A CN110022297 A CN 110022297A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/70—Media network packetisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
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Abstract
The invention discloses a kind of HD video live broadcast system, the system comprises: video acquisition module, HEVC compressed encoding module, Real-time Transport Protocol encapsulation plug-flow module, Multi net voting transmission module, user interactive module and system management module；The video acquisition module is sent to HEVC compressed encoding module after pre-processing the HD video original image of acquisition or is directly output to LCD display for acquiring HD video original image stream；The HEVC compressed encoding module is sent to Real-time Transport Protocol encapsulation plug-flow module after carrying out compressed encoding to high clear video image stream；Real-time Transport Protocol encapsulation plug-flow module stream naked to video is output to Multi net voting transmission module after being packaged encapsulation；The Multi net voting transmission module is sent to destination host after carrying out fragment and group packet to RTP bag data according to destination address and port.The present invention is based on the designs of HI3519 chip, improve system to the compatibility of input source resolution ratio, while the Multi net voting transmission module based on open source video designs improves the network adaptability of system.
Description
Technical field
The present invention relates to net cast fields, more particularly, to a kind of HD video live broadcast system.
Background technique
With the development of telling of cybertimes, the approach that people obtain information more tends to instantaneity, especially to live streaming
Demand is increasingly vigorous.Traditional broadcast grade live streaming device structure is complicated, equipment builds difficulty, it is professional to user require it is excessively high.
And conventional mobile phone live streaming is since clarity is low, stability is insufficient, the defects of can not accessing high definition photographic equipment, causes it that can not win
Appoint scene high to live streaming clarity and that stability requirement is tight.Therefore, one kind is easy to carry about with one, and non-professionality user easily uses, and
And the HD video live broadcast system for being suitable for various scenes is urgently researched and developed.
Summary of the invention
The present invention is to overcome the above-mentioned equipment of net cast in the prior art low to the compatibility of input source resolution ratio, and equipment is suitable
The not strong defect of answering property provides a kind of HD video live broadcast system.
The present invention is directed to solve above-mentioned technical problem at least to a certain extent.
Primary and foremost purpose of the invention is in order to solve the above technical problems, technical scheme is as follows:
A kind of HD video live broadcast system, the system comprises: video acquisition module, HEVC compressed encoding module, RTP association
View encapsulation plug-flow module, Multi net voting transmission module, user interactive module, system management module；
The video acquisition module is used to obtain HD video original image stream from front end camera, regards to the high definition of acquisition
Frequency original image carries out size pretreatment and noise reduction pretreatment, and pretreated high clear video image stream is input to HEVC compression
Coding module is directly output to LCD display；
The HEVC compressed encoding module carries out the high clear video image stream received according to preset coding parameter
HEVC compressed encoding, and the naked stream of video that compressed encoding obtains is input to Real-time Transport Protocol encapsulation plug-flow module；
The Real-time Transport Protocol encapsulation plug-flow module carries out Real-time Transport Protocol format and beats for reading the naked stream of video, analysis video parameter
Encapsulation, and the RTP bag data being packaged after encapsulating is output to Multi net voting transmission module；
The Multi net voting transmission module carries out UDP/IP network protocol fragment to RTP bag data according to destination address and port
With a group packet, the RTP packet of fragment group packet is sent to by the destination host in internet by each network interface card；
The user interactive module carries out parameter configuration by display screen interface for user and live command operates；
The system management module is used to encapsulate the video acquisition module, HEVC compressed encoding module, Real-time Transport Protocol
Plug-flow module, Multi net voting transmission module, user interactive module are monitored management.
Further, size pretreatment includes that the HD video original image of acquisition is cut and scaled.
Preset parameter is complied with by zooming in and out cutting to the HD video original image of acquisition.
Further, the HEVC video encoding module is based on HIS5119 chip and media-processing platform MPP is set
Meter, the media-processing platform includes: video input unit, video processing unit, video encoding unit, video output are single
Member；The high-definition live broadcasting system will carry out channel binding to media-processing platform MPP subelement before being acquired coding,
The channel binding is that the association established between media-processing platform MPP brother's subelement by Data receiver's binding data source is closed
System, after the channel binding, the data that data source generates will be automatically transmitted to recipient.
Further, the channel binding specifically includes: video processing unit binds video input unit, and video processing is single
Member receives data from video input unit；Video encoding unit binds video processing unit, and video encoding unit is handled from video
Unit receives data；
The HEVC video encoding module treatment process includes: video input unit for receiving video acquisition module output
High clear video image, video processing unit be used for blocking in received high clear video image content and covering at
Reason, to treated, video image carries out image coding to video encoding unit, and video output unit exports the naked stream of video.
Further, the video encoding unit includes coding pass submodule and coding protocol submodule.
Further, the video that the Real-time Transport Protocol encapsulation plug-flow module is read in from the buffer area of HD video live broadcast system
Naked flow data enters Real-time Transport Protocol encapsulation plug-flow inside modules data buffering queue, by the naked stream of video according to timestamp and frame class
Video encapsulation information is written by RTP/RTCP multiplexer Muxer in type information, and the video stream data of video encapsulation information will be written
It is input to RTP/RTCP Protocol module and carries out head encapsulation, the video stream data after head is encapsulated is transmitted to UDP/IP
Protocol module carries out UDP/IP protocol encapsulation, is sent to finally by the video stream data that network interface card finishes final encapsulation
Internet.
Further, the Multi net voting transmission module is realized by modification open source FFmpeg video library and is based on original socket
More network interface card link aggregations of word, detailed process are as follows: by the URL Protocol agreement of customized FFmpeg, modify the bottom FFmpeg
The mode of layer network transmission, is changed to raw socket for plain socket, HD video live broadcast system is selected each
Frame video data sends passed through network interface card, and cooperates quick dynamic network interface card handoff algorithms, realizes Multi net voting within the set time
The function of polymerization.
Further, the process of the Multi net voting polymerization are as follows: by RTP/RTCP multiplexer Muxer write-in video encapsulation letter
Video stream data after breath is transmitted to Multi net voting transmission module, the protocol inside the Multi net voting transmission module, that is, FFmpeg
In agreement, customized class udp protocol module is increased by the protocol agreement inside modification FFmpeg, by customized
Class udp protocol module carries out UDP/IP protocol encapsulation to the video stream data after encapsulating head and obtains video stream packet to be sent
Data send function and select suitable net by the currently available network interface card array of system when sending final video flowing message data
The video flowing message data to be sent is sent to internet by card；
The routing that the Multi net voting transmission module carries out network interface card to each video flowing message data packet to be sent is selected
It selects, HD video live broadcast system is according to the switching that can carry out network interface card with the state of network interface card, each video stream packet number to be sent
It is all transmitted by given network interface card outlet according to packet, same video flowing is assigned under heterogeneous networks, each video flowing
According to the identical address UDP/IP, final each video flowing message data packet is according to network route assemblage correct in internet to mesh
Host, video flowing receipts stream terminal buffered and sorted according to the sequence number in video flowing message data packet, restore one
Orderly video sequence stream, video sequence stream is decoded and is shown.
Further, described to there is HD video live broadcast system to be created in real-time servicing with network interface card network array, it is new when having
When network registry, new network, which is added, can use network interface card network array, when network disconnects, by network from available network array
Middle deletion.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
The present invention improves live broadcast system to the simultaneous of the resolution ratio of input source by using the design based on HI3519 chip
Capacitive, while the present invention is based on the network adaptabilities that the Multi net voting transmission module of open source video designs improves system.
Detailed description of the invention
Fig. 1 is live broadcast system configuration diagram.
Fig. 2 is video acquisition module functional mode schematic diagram.
Fig. 3 is video encoding module functional mode schematic diagram.
Fig. 4 is Real-time Transport Protocol packaging model schematic diagram.
Fig. 5 is Multi net voting transmission module functional mode schematic diagram.
Fig. 6 is MPP internal processes figure.
Fig. 7 is live broadcast system coding module core process figure.
Fig. 8 is coding module process flow diagram.
Fig. 9 is that FFmpeg handles broad flow diagram.
Figure 10 is that multilink selects schematic diagram.
Figure 11 is that FFmpeg internal agreement encapsulates flow chart.
Specific embodiment
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
Embodiment 1
As shown in Figure 1, the present invention is to think HI3519SOC based on sea, using (SuSE) Linux OS, the high definition of acquisition is regarded
Frequency carries out a new generation's efficiently HEVC compressed encoding, and the real time streaming control protocol based on FFmpeg open source video library
RTP/RTCP encapsulation, then passes through Wi-Fi network, the 4G network transmission of wired Ethernet networks and three kinds of different operators
To internet, to realize the HD video live broadcast system of the function of low time delay live streaming HD video under Multi net voting.It is of the present invention
A kind of HD video live broadcast system specifically include: video acquisition module, HEVC compressed encoding module, Real-time Transport Protocol encapsulation plug-flow
Module, Multi net voting transmission module, user interactive module and system management module；
The video acquisition module as shown in Figure 2 is used to obtain HD video original image stream from front end camera, according to
Preset parameter carries out size pretreatment to the HD video original image of acquisition and noise reduction pre-processes, the size pretreatment
Including the HD video original image of acquisition is cut and is scaled.By contracting to the HD video original image of acquisition
It puts cutting and complies with preset parameter.
Pretreated high clear video image stream is input to HEVC compressed encoding module or is directly output to LCD and is shown
Screen；
The HEVC compressed encoding module carries out the high clear video image stream received according to preset coding parameter
HEVC compressed encoding, and the naked stream of video that compressed encoding obtains is input to Real-time Transport Protocol encapsulation plug-flow module；As shown in Figure 3.
The Real-time Transport Protocol encapsulation plug-flow module carries out Real-time Transport Protocol format and beats for reading the naked stream of video, analysis video parameter
Encapsulation, and the RTP bag data being packaged after encapsulating is output to Multi net voting transmission module；
As shown in figure 4, the Multi net voting transmission module uses Linux-socket socket, according to destination address and port
UDP/IP network protocol fragment and group packet are carried out to RTP bag data, the RTP packet of fragment group packet is sent to by interconnection by each network interface card
Destination host in net；
As shown in figure 5, user interactive module carries out parameter configuration by display screen interface for user and live command is grasped
Make；
The system management module is used to encapsulate the video acquisition module, HEVC compressed encoding module, Real-time Transport Protocol
Plug-flow module, Multi net voting transmission module, user interactive module are monitored management.
HEVC video encoding module described in the present embodiment is based on HIS5119 chip and media-processing platform MPP is designed,
The internal processes of media-processing platform MPP are illustrated in figure 6, the media-processing platform MPP includes: video input list
Member (VI), video processing unit (VPSS), video encoding unit (VENC), video output unit (VO)；The high-definition live broadcasting system
System will carry out channel binding, the channel binding is to pass through before being acquired coding to media-processing platform MPP subelement
The incidence relation between media-processing platform MPP brother's subelement is established in Data receiver's binding data source, after the channel binding,
The data that data source generates will be automatically transmitted to recipient.
Channel binding specifically includes: video processing unit binds video input unit, and video processing unit is from video
Input unit receives data；Video encoding unit binds video processing unit, and video encoding unit is received from video processing unit
Data；
The HEVC video encoding module treatment process includes: as shown in fig. 7, video acquisition inputs the video by HI3519
The ITU-R BT1120 interface video data of input unit receives the high clear video image of video acquisition module output, video
Processing unit is used to carry out cutting to blocking in received high clear video image content and covering and then scaling processing exports
To video encoding unit；The video encoding unit includes coding pass submodule and coding protocol submodule, as shown in figure 8,
Coded command is received in the HD video live broadcast system awaited orders, video encoding unit obtains given according to user from display screen
Video coding parameter, video encoding unit adjusts encoded attributes and configuration, carries out image coding to treated video image,
Video output unit exports the naked stream of video.
Real-time Transport Protocol encapsulation plug-flow module and Multi net voting transmission module are all contained in the Streaming Media based on FFmpeg in the present invention
Transmission module, the naked flow data of video that the Real-time Transport Protocol encapsulation plug-flow module is read in from the buffer area of HD video live broadcast system
Real-time Transport Protocol encapsulation plug-flow inside modules data buffering queue is entered, by the naked stream of video according to timestamp and frame type information, is led to
RTP/RTCP multiplexer Muxer write-in video encapsulation information is crossed, the video stream data that video encapsulation information is written is input to
RTP/RTCP Protocol module carries out head encapsulation, and the video stream data after head is encapsulated is transmitted to UDP/IP
Protocol module carries out UDP/IP protocol encapsulation, is sent to finally by the video stream data that network interface card finishes final encapsulation
Internet.
As shown in Figure 9.The package essences of Real-time Transport Protocol be exactly the head that is defined according to the information of video flowing to RTP standard into
Row assignment generates.The predominantly filling of the information such as RTP loadtype, the timestamp of video frame, sequence number.RTP itself is only transmitted
Video flowing, to video flowing, it is not controlled, and control is carried out by rtcp protocol, and HD video live broadcast system is periodically sent
RTCP message, according to the difference of configuration, the major function for usually only occupying 5%, RTCP of transmission bandwidth is for application program
The information of quality of the conversation or broadcast behavior quality is provided.The not instead of video data of each RTCP message load, communication are double
The link statistics information of side.These information include packet number, the packet number of loss and the shake of packet sent
Situations such as, reflect the situation of current network.The encapsulation of RTP/RTCP agreement belongs to one of multiplexer muxer in FFmpeg
Point, algorithm is realized with the official document according to standard, the present invention has directly used the interface of FFmpeg.
As shown in Figure 10, the Multi net voting transmission module is realized by modification open source FFmpeg video library and is based on original set
Connect more network interface card link aggregations of word, detailed process are as follows: by the URL Protocol agreement of customized FFmpeg, modify FFmpeg
The mode of bottom-layer network transmission, is changed to raw socket for plain socket, HD video live broadcast system is selected often
One-frame video data sends passed through network interface card, and cooperates quick dynamic network interface card handoff algorithms, realizes more nets within the set time
The function of network polymerization.
The detailed process of the Multi net voting polymerization are as follows: after video encapsulation information is written in RTP/RTCP multiplexer Muxer
Video stream data be transmitted to Multi net voting transmission module, the protocol agreement inside the Multi net voting transmission module, that is, FFmpeg
It is interior, customized class udp protocol module is increased by the protocol agreement inside modification FFmpeg, passes through customized class
Udp protocol module carries out UDP/IP protocol encapsulation to the video stream data after encapsulating head and obtains video stream packet number to be sent
According to transmission function selects suitable network interface card by the currently available network interface card array of system when sending final video flowing message data
The video flowing message data to be sent is sent to internet；
The routing that the Multi net voting transmission module carries out network interface card to each video flowing message data packet to be sent is selected
It selects, HD video live broadcast system is described as shown in figure 11 to use network interface card net according to the switching that can carry out network interface card with the state of network interface card
Network array has HD video live broadcast system to be created in real-time servicing, and when there is new network registry, the addition of new network can be used network interface card
Network array deletes network when network is disconnected from available network array.
Each video flowing message data packet to be sent is transmitted by given network interface card outlet, same video flowing
It is assigned under heterogeneous networks, each video flowing is pressed according to the identical address UDP/IP, final each video flowing message data packet
According to network route assemblage correct in internet to destination host, the receipts stream terminal of video flowing is according in video flowing message data packet
Sequence number buffered and sorted, restore an orderly video sequence stream, video sequence stream is decoded and is shown.
The same or similar label correspond to the same or similar components；
The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (9)
1. a kind of HD video live broadcast system, which is characterized in that the system comprises: video acquisition module, HEVC compressed encoding
Module, Real-time Transport Protocol encapsulate plug-flow module, Multi net voting transmission module, user interactive module, system management module；
The video acquisition module is used to obtain HD video original image stream from front end camera, former to the HD video of acquisition
Beginning image carries out size pretreatment and noise reduction pretreatment, and pretreated high clear video image stream is input to HEVC compressed encoding
Module is directly output to LCD display；
The HEVC compressed encoding module carries out HEVC pressure to the high clear video image stream received according to preset coding parameter
Code is reduced the staff, and the naked stream of video that compressed encoding obtains is input to Real-time Transport Protocol encapsulation plug-flow module；
The Real-time Transport Protocol encapsulation plug-flow module carries out Real-time Transport Protocol format and is packaged envelope for reading the naked stream of video, analysis video parameter
Dress, and the RTP bag data being packaged after encapsulating is output to Multi net voting transmission module；
The Multi net voting transmission module carries out UDP/IP network protocol fragment and group to RTP bag data according to destination address and port
Packet, is sent to the destination host in internet for the RTP packet of fragment group packet by each network interface card；
The user interactive module carries out parameter configuration by display screen interface for user and live command operates；
The system management module is used to encapsulate plug-flow to the video acquisition module, HEVC compressed encoding module, Real-time Transport Protocol
Module, Multi net voting transmission module, user interactive module are monitored management.
2. a kind of HD video live broadcast system according to claim 1, which is characterized in that the size, which pre-processes, includes
The HD video original image of acquisition is cut and scaled.
3. a kind of HD video live broadcast system according to claim 1, which is characterized in that the HEVC video encoding module
It is designed based on HIS5119 chip and media-processing platform MPP, the media-processing platform includes: video input unit,
Video processing unit, video encoding unit, video output unit；The high-definition live broadcasting system, will before being acquired coding
Channel binding is carried out to media-processing platform MPP subelement, the channel binding is built by Data receiver's binding data source
Incidence relation between vertical media-processing platform MPP brother's subelement, after the channel binding, the data that data source generates will be automatic
It is sent to recipient.
4. a kind of HD video live broadcast system according to claim 3, which is characterized in that the specific packet of channel binding
Include: video processing unit binds video input unit, and video processing unit receives data from video input unit；Video coding list
Member binding video processing unit, video encoding unit receive data from video processing unit；
The HEVC video encoding module treatment process includes: the height that video input unit is used to receive video acquisition module output
Clear video image, video processing unit is used for blocking in received high clear video image content and covering is handled, depending on
To treated, video image carries out image coding to frequency coding unit, and video output unit exports the naked stream of video.
5. a kind of HD video live broadcast system according to claim 3, which is characterized in that the video encoding unit includes
Coding pass submodule and coding protocol submodule.
6. a kind of HD video live broadcast system according to claim 1, which is characterized in that the Real-time Transport Protocol encapsulates plug-flow
The naked flow data of video that module is read in from the buffer area of HD video live broadcast system enters Real-time Transport Protocol encapsulation plug-flow inside modules
Video is written by RTP/RTCP multiplexer Muxer by the naked stream of video according to timestamp and frame type information in data buffering queue
The video stream data that video encapsulation information is written is input to RTP/RTCP Protocol module and carries out head envelope by packaging information
Dress, the video stream data after head is encapsulated are transmitted to UDP/IP Protocol module, carry out UDP/IP protocol encapsulation, finally
Internet is sent to by the video stream data that network interface card finishes final encapsulation.
7. a kind of HD video live broadcast system according to claim 1, which is characterized in that the Multi net voting transmission module is logical
Modification open source FFmpeg video library is crossed, realizes more network interface card link aggregations based on raw socket, detailed process are as follows: by making by oneself
The URL Protocol agreement of adopted FFmpeg, the mode of modification FFmpeg bottom-layer network transmission, plain socket is changed to original
Socket enables HD video live broadcast system to select each frame video data and sends passed through network interface card, and cooperates quick
Dynamic network interface card handoff algorithms realize the function of Multi net voting polymerization within the set time.
8. according to a kind of described in any item HD video live broadcast systems of claim 6-7, which is characterized in that the Multi net voting is poly-
The process of conjunction are as follows: the video stream data after video encapsulation information is written in RTP/RTCP multiplexer Muxer is transmitted to Multi net voting
Transmission module, in the protocol agreement inside the Multi net voting transmission module, that is, FFmpeg, inside modification FFmpeg
Protocol agreement increases customized class udp protocol module, by customized class udp protocol module to head is encapsulated after
Video stream data carry out UDP/IP protocol encapsulation and obtain video flowing message data to be sent, send function and sending final view
Select suitable network interface card by the video stream packet number to be sent by the currently available network interface card array of system when frequency stream packet data
According to being sent to internet；
The Multi net voting transmission module carries out the Route Selection of network interface card to each video flowing message data packet to be sent, high
Clear video living transmission system is according to the switching that can carry out network interface card with the state of network interface card, each video flowing message data packet to be sent
It is transmitted by given network interface card outlet, same video flowing is assigned under heterogeneous networks, and each video flowing is according to phase
The same address UDP/IP, final each video flowing message data packet is according to network route assemblage correct in internet to purpose master
The receipts stream terminal of machine, video flowing is buffered and is sorted according to the sequence number in video flowing message data packet, restores one orderly
Video sequence stream is decoded and is shown by video sequence stream.
9. a kind of HD video live broadcast system according to claim 8, which is characterized in that described to use network interface card network array
There is HD video live broadcast system to be created in real-time servicing, when there is new network registry, the addition of new network can be used into network interface card network number
Group deletes network when network is disconnected from available network array.
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| CN112929742A (en) * | 2021-01-22 | 2021-06-08 | 东南大学 | Ultra-high-speed video stream control method and system based on NI millimeter wave system |
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