CN103856806B - Video stream switching method, apparatus and system - Google Patents
Video stream switching method, apparatus and system Download PDFInfo
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- CN103856806B CN103856806B CN201210495363.8A CN201210495363A CN103856806B CN 103856806 B CN103856806 B CN 103856806B CN 201210495363 A CN201210495363 A CN 201210495363A CN 103856806 B CN103856806 B CN 103856806B
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Abstract
The invention discloses a kind of video stream switching method, apparatus and system, belong to multi-media processing field.The described method includes：Preserve the video stream label for including decoding parametric in the two-way or two-way above video flowing received；When switching to alternative videos stream from current video stream, the decoding parametric in the video stream label of the current video stream is replaced with the decoding parametric in the video stream label of the alternative videos stream；The video stream label after decoding parametric is replaced described in transmission to video player；The data to be played in the alternative videos stream are sent to the video player.The present invention is by using the decoding parametric in the video stream label replaced in current video stream, to allow video player to reset decoding parametric automatically, having reached two video data streams with seamless switching, can be particularly the effect of seamless switching of two different video data streams of decoding parametric.
Description
Technical field
The present invention relates to multi-media processing field, more particularly to a kind of video stream switching method, apparatus and system.
Background technology
FLV (Flash Video, Streaming Media) is a kind of very extensive video format of present application, can use difference
Code check and resolution ratio come encode FLV stream.
In the case where carrying out the scene of net cast, may be flowed at the same time there are multichannel FLV for playing, such as, in the Olympic Games
In network direct broadcasting system, the live two-way FLV streams live with basketball of the football being carried out at the same time may be received, are existed at this time
The problem of being toggled between two-way FLV streams.Existing video stream switching method mainly includes：First, cut-out is current all the way
The connection of FLV streams；Second, reconnect in addition data that server obtains FLV streams all the way.
In the implementation of the present invention, inventor has found that the prior art has at least the following problems：Again chaining service
Device is like from a channel switching to another channel, can cause data buffering, produce the interruption of video playing, sternly
Ghost image rings user experience.
The content of the invention
In order to solve the problems, such as that existing video stream switching method easily produces interruption, an embodiment of the present invention provides one kind to regard
Frequency stream switching method, apparatus and system.The technical solution is as follows：
First aspect, there is provided a kind of video stream switching method, the described method includes：
Preserve the video stream label for including decoding parametric in the two-way or two-way above video flowing received；
When switching to alternative videos stream from current video stream, joined with the decoding in the video stream label of the alternative videos stream
Number replaces the decoding parametric in the video stream label of the current video stream；
The video stream label after decoding parametric is replaced described in transmission to video player；
The data to be played in the alternative videos stream are sent to the video player.
Further, the decoding parametric in the video stream label with the alternative videos stream replaces the current video
Before decoding parametric in the video stream label of stream, further include：
Judge that the decoding parametric in the video stream label of the alternative videos stream and the video of the current video stream are failed to be sold at auction
Whether the decoding parametric in label is identical；
If identical, the data to be played sent in the alternative videos stream are directly performed to the video playing
The step of device；
If it is not the same, then perform described in the decoding parametric replacement in the video stream label with the alternative videos stream
The step of decoding parametric in the video stream label of current video stream.
Further, before the data to be played sent in the alternative videos stream are to the video player, also
Including：
Preserve last timestamp in institute's played data before being switched in the current video stream；
The data to be played sent in the alternative videos stream include to the video player, correspondence：
All timestamps in the data to be played in the alternative videos stream are changed, are all higher than amended timestamp
Last timestamp of the preservation；
Data sending to be played after modification time is stabbed gives the video player.
Further, it is described switch to alternative videos stream from current video stream before, further include：
Obtain the transmission rate towards the video encoder；
Judge whether to need to switch to alternative videos stream from current video stream according to the transmission rate；
If it is, the step of switching to alternative videos stream from current video stream described in performing.
Further, it is described to judge whether to need to switch to alternative videos from current video stream according to the transmission rate
Stream, specifically includes：
Detect whether the transmission rate is more than the first predetermined threshold；
If detecting more than the first predetermined threshold, the alternative videos stream is switched to from the current video stream, it is described
The code check of alternative videos stream is more than the code check of the current video stream；
And/or
Detect whether the transmission rate is less than the second predetermined threshold；
If detecting less than the second predetermined threshold, the alternative videos stream is switched to from the current video stream, it is described
The code check of alternative videos stream is less than the code check of the current video stream.
Second aspect, there is provided a kind of video flowing switching device, described device include：
Label preserving module, for preserving regarding comprising decoding parametric in the two-way or two-way above video flowing that receive
Frequency stream label；
Parameter replacement module, during for switching to alternative videos stream from current video stream, with regarding for the alternative videos stream
Decoding parametric in frequency stream label replaces the decoding parametric in the video stream label of the current video stream；
Parameter sending module, for sending the video stream label being replaced after decoding parametric to video player；
Data transmission blocks, for sending the data to be played in the alternative videos stream to the video player.
Further, the video flowing switching device, further includes：
Parameter judgment module；
The parameter judgment module, decoding parametric in video stream label for judging the alternative videos stream and described
Whether the decoding parametric in the video stream label of current video stream is identical；
The data transmission blocks, if the judging result for being additionally operable to the parameter judgment module is identical, directly hold
The step of row data to be played sent in the alternative videos stream are to the video player；
The parameter sending module, if the judging result specifically for the parameter judgment module is to differ, holds
Decoding parametric in the row video stream label with the alternative videos stream replaces the video stream label of the current video stream
In decoding parametric the step of.
Further, the video flowing switching device, further includes：
Time preserving module；
The time preserving module, for preserve be switched in the current video stream before last in institute played data
A timestamp；
The data transmission blocks, correspondence include：
Time modification unit and data transmission unit；
The time modification unit, for changing all timestamps in the data to be played in the alternative videos stream,
Amended timestamp is set to be all higher than last timestamp of the preservation；
The data transmission unit, the video player is given for the data sending to be played after modification time is stabbed.
Further, the video flowing switching device, further includes：
Speed acquisition module and switching judging module；
The speed acquisition module, for obtaining the transmission rate towards the video encoder；
The switching judging module, it is standby for judging whether to need to switch to from current video stream according to the transmission rate
Select video flowing；
The parameter replacement module, if the judging result for the switching judging module is yes, perform it is described from
Current video stream switches to the step of alternative videos stream.
Further, the switching judging module, is specifically used for：
Detect whether the transmission rate is more than the first predetermined threshold；If detecting more than the first predetermined threshold, need
The alternative videos stream is switched to from the current video stream, the code check of the alternative videos stream is more than the current video stream
Code check；
And/or
Detect whether the transmission rate is less than the second predetermined threshold；If detecting less than the second predetermined threshold, need
The alternative videos stream is switched to from the current video stream, the code check of the alternative videos stream is less than the current video stream
Code check.
A kind of third aspect, there is provided audio/video player system, it is characterised in that the system comprises：At least two videos
Stream provides server, video flowing switching device and the client comprising video player；
The video flowing switching device is as any in the various further embodiments of second aspect or second aspect
The video flowing switching device.
The beneficial effect that technical solution provided in an embodiment of the present invention is brought is：
By using the decoding parametric in the video stream label replaced in current video stream, make it that video player can be with
It is automatic to reset decoding parametric, solve the problems, such as that existing video stream switching method reconnects server and easily produces interruption, reach
To existing video stream switching method is saved when two video flowings switch, direct broadcast server, which needs to disconnect, corresponds to current video
The network connection of stream, resettles the network connection corresponding to alternative videos stream again, and needs to re-read alternative videos stream
Related data (such as header file) spent by more time, connection need not be re-established by having reached, two video data streams
Can seamless switching, particularly two different video data streams of decoding parametric can be with the effect of seamless switching.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the method flow diagram for the video stream switching method that the embodiment of the present invention one provides；
Fig. 2A is the implementation environment schematic diagram of video stream switching method provided by Embodiment 2 of the present invention；
Fig. 2 B are the method flow diagrams of video stream switching method provided by Embodiment 2 of the present invention；
Fig. 3 A are the implementation environment schematic diagrames for the video stream switching method that the embodiment of the present invention three provides；
Fig. 3 B are the method flow diagrams for the video stream switching method that the embodiment of the present invention three provides；
Fig. 4 is the structure diagram for the video flowing switching device that the embodiment of the present invention four provides；
Fig. 5 is the structure diagram for the video flowing switching device that the embodiment of the present invention five provides；
Fig. 6 is the structure diagram for the video flowing switching device that the embodiment of the present invention six provides；
Fig. 7 is the structure diagram for the audio/video player system that the embodiment of the present invention seven provides.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
FLV (Flash Video, Streaming Media) stream be it is a kind of be used to encapsulate the stream media format of video data encoder, in it
The video data encoder in portion can use H.264 standard code.When H.264 video data encoder using encoding, FLV streams include three
The label of type, is respectively audio tag, video tab and metadata (Metadata) label.In metadata tag usually all
Include decoding parametric SPS (sequence parameter set sequence parameter sets) and decoding parametric PPS (picture
Parameter set, picture parameter set).Wherein：
Decoding parametric SPS refers to：By a video sequence (to the data before next every IDR frame since an every IDR frame
A referred to as video sequence) in the common traits of all images extract, be stored in SPS syntactic units.That is, only
SPS could be switched between two video sequences by having.In other words, first piece of only every IDR frame can switch SPS.It is " common special
Sign " includes the information of resolution ratio and code check etc, is usually remained unchanged in a video sequence, and can be used for decoding.
Decoding parametric PPS refers to：The characteristic feature of each image is extracted, is stored in PPS syntactic units.
That is, PPS could be switched only between image.In other words, first piece only per two field picture can switch PPS.
Wherein, every IDR frame belongs to a kind of special I frames.When decoder receives every IDR frame, all Reference Frame Lists are abandoned.
This point is characteristic that all I frames share, but when receiving every IDR frame, decoder additionally needs the work done and is exactly：All solutions
Code parameter PPS and SPS are updated so that the decoding parametric of decoder is updated.
Please refer to Fig.1, the method flow diagram of the video stream switching method provided it illustrates the embodiment of the present invention one.This is regarded
Frequency stream switching method, including：
Step 102, preserve the two-way received or the video stream label of decoding parametric is included in two-way above video flowing；
Step 104, when switching to alternative videos stream from current video stream, with the solution in the video stream label of alternative videos stream
Code parameter replaces the decoding parametric in the video stream label of current video stream；
Step 106, the video stream label after being replaced decoding parametric is sent to video player；
Step 108, the data to be played in alternative videos stream are sent to video player.
In conclusion video stream switching method provided in an embodiment of the present invention, by using in replacement current video stream
Decoding parametric in video stream label, to allow video player to reset decoding parametric automatically, solves existing video flowing
Switching method reconnects the problem of server easily produces interruption, saves existing video stream switching method in two video flowings
During switching, direct broadcast server needs to disconnect the network connection corresponding to current video stream, resettles again corresponding to alternative videos
The network connection of stream, and the more time spent by the related data (such as header file) of alternative videos stream is re-read, reach
To need not re-establish connection, two video data streams can seamless switching, particularly two decoding parametrics are different
Video data stream can be with the effect of seamless switching.
In a upper embodiment, whether video flowing, which needs, switches, and can be cut by miscellaneous equipment triggering current device
Change；Can also be switched over by current device itself triggering.In order to triggering what current device switched over by miscellaneous equipment
Situation is described in detail, and refer to as follows：
See Fig. 2A, it illustrates a kind of implementation environment involved by video stream switching method provided by Embodiment 2 of the present invention
Structure diagram.The implementation environment is an audio/video player system, which includes：First video flowing provides clothes
Be engaged in device 21, the second video flowing provide server 22, the 3rd video flowing provide server 23, direct broadcast server 24, instructor in broadcasting's platform 25,
CDN (Content Delivery Network, content distributing network) networks 26 and the client 27 comprising video player.
Wherein, the first video flowing provides server 21, the second video flowing provides 22 and the 3rd video flowing of server and provides clothes
Business device 23 each provides FLV all the way and flows to direct broadcast server 24 respectively, the resolution ratio and code check of this three road FLV streams can be identical,
Can also be different.
Direct broadcast server 24 can be received from the first video flowing provides server 21, the second video flowing provides server
22 and the 3rd video flowing the three road FLV streams of server 23 are provided, then according to the switch-over control signal of instructor in broadcasting's platform 25, selection is wherein
The output of FLV streams is to CDN network 26 all the way, to be transmitted to the client 27 comprising video player by CDN network 26.
See Fig. 2 B, it illustrates the method flow diagram of video stream switching method provided by Embodiment 2 of the present invention.This implementation
Example mainly is applied to illustrate in direct broadcast server 24 as shown in Figure 2 A with the video stream switching method.Meanwhile this reality
Encapsulation format of the example also only using FLV as video flowing is applied to come for example, for the video stream switching method applied to other having
The embodiment of the Streaming Media handoff scenario of identical or similar structure, for those skilled in the art easily full of beard and part,
No longer repeat one by one.The video stream switching method, including：
Step 201, preserve the two-way received or the video stream label of decoding parametric is included in two-way above video flowing；
Direct broadcast server can be received from the first video flowing provides server, the second video flowing provides server and the
Three video flowings provide the three road FLV streams of server, and each FLV streams are respectively used to carry different video contents.At this time, live clothes
Business device can extract in each road FLV streams and include the video stream label of decoding parametric, and store to precalculated position.It is in addition, live
Server can also be first by the stream outputs of FLV all the way to CDN network, to play in real time.
Step 202, the switch-over control signal of instructor in broadcasting's platform is received；
Instructor in broadcasting's platform can send switch-over control signal when needing to carry out video content switching to direct broadcast server.This is cut
Control signal is changed to be used to indicate that direct broadcast server switches to another alternative FLV stream from currently playing FLV streams.Such as
Switch-over control signal is used to indicate that direct broadcast server is cut from FLV streams currently playing, from the first video flowing offer server
Shift to the FLV streams from the second transcoding player.
Step 203, last timestamp in institute's played data before being switched in current video stream is preserved；
Played data includes audio tag and video tab, and timestamp (Timestamp) is present in audio and video label
One data, it might not be related with the real time, be only used for identifying the sequencing of each audio and video label.Live
After server receives switch-over control signal, last before being switched in current video stream in institute's played data can be preserved
A timestamp.Specifically, it can be in be currently played video sequence last audio tag or video mark
Timestamp in label.
Step 204, judge that the video of the decoding parametric in the video stream label of alternative videos stream and current video stream is failed to be sold at auction
Whether the decoding parametric in label is identical；If identical, 205 are entered step；If it is not the same, then enter step 206；
The video stream label of current video stream can be next after video sequence currently playing in current video stream
First video stream label for including coding parameter in video sequence, namely it is related with first piece of next every IDR frame
Video stream label, coding parameter include PPS and SPS；The video stream label of alternative videos stream can be nearest in alternative videos stream
First video stream label for including coding parameter in the video sequence received, namely with having received the of every IDR frame recently
The related video stream label of one piece, coding parameter equally include PPS and SPS.Direct broadcast server may determine that both decodings
Whether parameter is identical.
Step 205, the data to be played in alternative videos stream are sent to video player；
If both decoding parametrics are identical, direct broadcast server can regarding being most recently received in alternative videos stream
Frequency sequence is as data sending to be played to video player.Specifically in the present embodiment, direct broadcast server can be via CDN nets
The transmission of network, the client comprising video player is sent to by alternative videos stream.Specifically, this step can include as follows
Two sub-steps：
First, all timestamps in the data to be played in alternative videos stream are changed, make amended timestamp big
In last timestamp of preservation；
Since the timestamp of alternative videos stream middle pitch video tab may be less than current video stream middle pitch video tab
Timestamp, it is therefore desirable to change all timestamps in the data to be played in alternative videos stream, makes amended timestamp equal
Last timestamp preserved more than step 203.
Second, the data sending to be played after modification time is stabbed is to video player.
After the timestamp of alternative videos stream middle pitch video tab is changed, direct broadcast server can be by modification time
Data sending to be played after stamp is to video player.
Step 206, the video for current video stream being replaced with the decoding parametric in the video stream label of alternative videos stream is failed to be sold at auction
Decoding parametric in label；
If both decoding parametrics differ, direct broadcast server can use the solution in the video stream label of alternative videos stream
Code parameter replaces the decoding parametric in the video stream label of current video stream.
Step 207, the video stream label after being replaced decoding parametric is sent to video player；
Direct broadcast server can send the video stream label after being replaced decoding parametric to video player.At this moment, video
Player can reset decoding parametric using existing IDR update mechanisms naturally, and the decoding parametric after resetting is substantially
Switched by the decoding parametric of current video stream for the decoding parametric of alternative videos stream.
Step 205, the data to be played in alternative videos stream are sent to video player.
If both decoding parametrics differ, but direct broadcast server is replaced the decoding parametric of current video stream
Change, direct broadcast server still can send data to be played in alternative videos stream to video player.Specific transmission process
With reference to foregoing.Since the decoding parametric in video player at this time has substantially switched the decoding ginseng for alternative videos stream
Number, although both resolution ratio or the data of code check etc are different, video player still can be directly to alternatively regarding
Frequency stream plays out.
Obviously, whole handoff procedure is seamless progress, it is not necessary to carries out reconnecting the operation such as server, removes network
The influence of speed, will not produce Caton phenomenon.
In conclusion video stream switching method provided in an embodiment of the present invention, by using in replacement current video stream
Decoding parametric in video stream label, to allow video player to reset decoding parametric automatically, solves existing video flowing
Switching method reconnects server the problem of easily producing interruption, reaches and saves existing video stream switching method and regarded at two
During frequency stream switching, direct broadcast server needs to disconnect the network connection corresponding to current video stream, resettles again corresponding to alternative
The network connection of video flowing, and when re-reading more spent by the related data (such as header file) of alternative videos stream
Between, connection need not be re-established by having reached, and two video data streams can seamless switching, particularly two decoding parametrics not phase
Same video data stream can be with the effect of seamless switching.
Whether video flowing needs switching or is switched over by current device itself triggering.In order to by currently setting
The situation that itself standby triggering switches over is described in detail, and refer to as follows：
See Fig. 3 A, a kind of implementation environment involved by video stream switching method provided it illustrates the embodiment of the present invention three
Structure diagram.The implementation environment is a live broadcast system, which includes：First video flowing offer server 31,
Second video flowing provides server 32, the 3rd video flowing provides server 33, direct broadcast server 34, CDN (Content
Delivery Network, content distributing network) network 36 and client 37.
Wherein, the first video flowing provides server 31, the second video flowing provides 32 and the 3rd video flowing of server and provides clothes
Business device 33 each provides FLV all the way and flows to direct broadcast server 34 respectively, and the content of this three road FLV streams can be just the same, still
Resolution ratio and code check can be different.Such as first video flowing provide server 31 provide resolution ratio and code check highest, can
To be referred to as the high definition version of current video；Second video flowing provides the resolution ratio that server 32 provides and code check is medium, can be with
The referred to as SD version of current video；3rd video flowing provides the resolution ratio and code check minimum that server 33 provides, Ke Yijian
The referred to as general clear version of current video.
Direct broadcast server 34 can be received from the first video flowing provides server 31, the second video flowing provides server
32 and the 3rd video flowing the three road FLV streams of server 33 are provided, then at the same time by three road FLV stream outputs to CDN network 36, so as to
Select wherein all the way FLV circulations to issue the client 37 comprising video player by CDN network 36 to play out.
See Fig. 3 B, it illustrates the method flow diagram of video stream switching method provided by Embodiment 2 of the present invention.This implementation
Example mainly is applied to illustrate in CDN network 36 as shown in Figure 3A with the video stream switching method.Meanwhile the present embodiment
Also the encapsulation format only using FLV as video flowing comes for example, being applied to other with identical for the video stream switching method
Or the embodiment of the Streaming Media handoff scenario of similar structure, for those skilled in the art easily full of beard and part, no longer
Repeat one by one.The video stream switching method, including：
Step 301, preserve the two-way received or the video stream label of decoding parametric is included in two-way above video flowing；
CDN network can receive by direct broadcast server send, from the first video flowing provide server, the second video
Stream provides server and the 3rd video flowing provides the three road FLV streams of server, and the content of each FLV streams can be just the same, but
It is that resolution ratio and code check can be different.At this time, CDN network can extract the video for including decoding parametric in each road FLV streams
Stream label, and store to precalculated position.In addition, CDN network can also be first by the stream outputs of FLV all the way to client, so as to reality
When play.For example CDN network can select SD video to be sent to client, alternatively, CDN network can be worked as according to client
Suitable FLV streams are sent to client all the way for preceding network rate selection.
Step 302, the transmission rate towards video encoder is obtained；
CDN network can obtain the transmission rate towards video encoder, namely the network between CDN network and client
Speed.Because in actual use, the network rate between CDN network and client may fluctuate at any time.
Step 303, judge whether to need to switch to alternative videos stream from current video stream according to transmission rate；
CDN network can judge whether to need to switch to alternative videos stream from current video stream according to transmission rate.Specifically
Say that this step can include any in the following two kinds implementation in ground：
First, whether detection transmission rate is more than the first predetermined threshold；If detecting more than the first predetermined threshold, from work as
Preceding video flowing switches to alternative videos stream, and the code check of alternative videos stream is more than the code check of current video stream；
In such cases, the network rate between CDN network and client is improved by difference, and CDN network, which may determine that, to be worked as
Preceding video flowing needs to switch to the alternative videos stream of the code check with higher, such as：HD video is switched to from SD video, or
Person, SD video is switched to from general clear video.
Second, whether detection transmission rate is less than the second predetermined threshold；If detecting less than the second predetermined threshold, from work as
Preceding video flowing switches to alternative videos stream, and the code check of alternative videos stream is less than the code check of current video stream
In such cases, by being deteriorated well, CDN network may determine that to be worked as the network rate between CDN network and client
Preceding video flowing needs to switch to the alternative videos stream with lower code check, such as：General clear video is switched to from SD video, or
Person, SD video is switched to from HD video.
Step 304, last timestamp in institute's played data before being switched in current video stream is preserved；
Played data includes audio tag and video tab, and timestamp (Timestamp) is present in audio and video label
One data, it might not be related with the real time, be only used for identifying the sequencing of each audio and video label.In CDN
Network is determined after needing Switch Video stream, can preserve last before being switched in current video stream in institute's played data
A timestamp.Specifically, it can be in be currently played video sequence last audio tag or video mark
Timestamp in label.
Step 305, the video for current video stream being replaced with the decoding parametric in the video stream label of alternative videos stream is failed to be sold at auction
Decoding parametric in label；
Differed by the decoding parametric of both current video stream in this present embodiment and alternative videos stream, CDN network can be with
The decoding parametric in the video stream label of current video stream is replaced with the decoding parametric in the video stream label of alternative videos stream.
Wherein, after the video stream label of current video stream can be video sequence currently playing in current video stream
First video stream label for including coding parameter in next video sequence, namely have with first piece of next every IDR frame
The video stream label of pass, coding parameter include PPS and SPS；The video stream label of alternative videos stream can be in alternative videos stream
First video stream label for including coding parameter in the video sequence being most recently received, namely with having received every IDR frame recently
The related video stream label of first piece, coding parameter equally includes PPS and SPS.
Step 306, the video stream label after being replaced decoding parametric is sent to video player；
CDN network can send the video stream label after being replaced decoding parametric to client.At this moment, client can be certainly
Decoding parametric so is reset using existing IDR update mechanisms, and the decoding parametric after resetting is substantially via current video stream
Decoding parametric switch for the decoding parametric of alternative videos stream.
Step 307, the data to be played in alternative videos stream are sent to video player.
CDN network sends specific transmission process of the data to be played to client in alternative videos stream, may be referred to as
Under：
First, all timestamps in the data to be played in alternative videos stream are changed, make amended timestamp big
In last timestamp of preservation；
Since the timestamp of alternative videos stream middle pitch video tab may be less than current video stream middle pitch video tab
Timestamp, it is therefore desirable to change all timestamps in the data to be played in alternative videos stream, makes amended timestamp equal
Last timestamp preserved more than step 304.
Second, the data sending to be played after modification time is stabbed is to video player.
After the timestamp of alternative videos stream middle pitch video tab is changed, CDN network can stab modification time
Data sending to be played afterwards is to client.
Since the decoding parametric in client at this time has substantially switched for the decoding parametric of alternative videos stream, although
Both resolution ratio or the data of code check etc are different, but client still directly can broadcast alternative videos stream
Put.
Obviously, whole handoff procedure is seamless progress, it is not necessary to carries out reconnecting the operation such as server, removes network
The influence of speed, will not produce Caton phenomenon.
In conclusion video stream switching method provided in an embodiment of the present invention, by using in replacement current video stream
Decoding parametric in video stream label, to allow video player to reset decoding parametric automatically, solves existing video flowing
Switching method reconnects server the problem of easily producing interruption, reaches and saves existing video stream switching method and regarded at two
During frequency stream switching, direct broadcast server needs to disconnect the network connection corresponding to current video stream, resettles again corresponding to alternative
The network connection of video flowing, and need to re-read more spent by the related data (such as header file) of alternative videos stream
Time, connection need not be re-established by having reached, two video data streams can seamless switching, particularly two decoding parametrics not
Identical video data stream can be with the effect of seamless switching.In addition, also regarded by the network rate according to client, dynamic adjustment
Frequency switches, and optimal result of broadcast can be provided for client.
It should be noted that although the resolution ratio and code of every road video flowing are known a priori by with CDN network in the present embodiment
Rate illustrates.But in fact, still can increase by CDN network judge decoding parametric in each road video flowing whether phase
Same step, so that CDN network may determine that and identify the resolution ratio and code check of each road video flowing.This is those skilled in the art
Easy full of beard and content, no longer repeat one by one.
Example IV
Please refer to Fig.4, the block diagram of the video flowing switching device provided it illustrates the embodiment of the present invention four.This is regarded
Frequency stream switching device can be implemented as the part in direct broadcast server or CDN network.The video flowing switching device, bag
Include：Label preserving module 420, parameter replacement module 440, parameter sending module 460 and data transmission blocks 480.
Label preserving module 420, decoding parametric is included for preserving in the two-way or two-way above video flowing that receive
Video stream label；
Parameter replacement module 440, during for switching to alternative videos stream from current video stream, with the label preserving module
Decoding parametric in the video stream label of the 420 alternative videos streams preserved replaces the current of the preservation of label preserving module 420
Decoding parametric in the video stream label of video flowing；
Parameter sending module 460, the video after decoding parametric is replaced for sending described by parameter replacement module 440 and is failed to be sold at auction
Sign to video player；
Data transmission blocks 480, fail to be sold at auction for sending the video after replacing decoding parametric in the parameter sending module 460
After label, the data to be played in the alternative videos stream are sent to the video player.
In conclusion video flowing switching device provided in an embodiment of the present invention, by using in replacement current video stream
Decoding parametric in video stream label, to allow video player to reset decoding parametric automatically, solves existing video flowing
Switching method reconnects server the problem of easily producing interruption, reaches and saves existing video stream switching method and regarded at two
During frequency stream switching, direct broadcast server needs to disconnect the network connection corresponding to current video stream, resettles again corresponding to alternative
The network connection of video flowing, and need to re-read more spent by the related data (such as header file) of alternative videos stream
Time, connection need not be re-established by having reached, two video data streams can seamless switching, particularly two decoding parametrics not
Identical video data stream can be with the effect of seamless switching.
Embodiment five
Fig. 5 is refer to, the block diagram of the video flowing switching device provided it illustrates the embodiment of the present invention five.This is regarded
Frequency stream switching device can be implemented as the part in direct broadcast server or CDN network.The video flowing switching device, bag
Include：Label preserving module 420, time preserving module 432, parameter judgment module 434, parameter replacement module 440, parameter send mould
Block 460 and data transmission blocks 480.
Label preserving module 420, decoding parametric is included for preserving in the two-way or two-way above video flowing that receive
Video stream label；
Time preserving module 432, for before switching to alternative videos stream from current video stream, preserving the current video
Last timestamp before being switched in stream in institute's played data；
Parameter judgment module 434, for before switching to alternative videos stream from current video stream, judging the alternative videos
Whether the decoding parametric in the video stream label of stream and the decoding parametric in the video stream label of the current video stream are identical；
Parameter replacement module 440, if the judging result specifically for the parameter judgment module 434 is to differ,
Decoding parametric in the video stream label of the alternative videos stream preserved with the label preserving module 420 is replaced the label and is preserved
Decoding parametric in the video stream label for the current video stream that module 420 preserves；
Parameter sending module 460, the video after decoding parametric is replaced for sending described by parameter replacement module 440 and is failed to be sold at auction
Sign to video player；
Data transmission blocks 480, fail to be sold at auction for sending the video after replacing decoding parametric in the parameter sending module 460
After label, the data to be played in the alternative videos stream are sent to the video player.
The data transmission blocks 480, if the judging result for being additionally operable to the parameter judgment module 434 is identical,
Directly perform the step of data to be played sent in the alternative videos stream are to the video player.
The data transmission blocks 480, can include：Time modification unit 482 and data transmission unit 484；
The time modification unit 482, for changing institute's having time in the data to be played in the alternative videos stream
Stamp, makes amended timestamp be all higher than last timestamp that the time preserving module 432 preserves；
The data transmission unit 484, the video playing is given for the data sending to be played after modification time is stabbed
Device.
In conclusion video flowing switching device provided in an embodiment of the present invention, by using in replacement current video stream
Decoding parametric in video stream label, to allow video player to reset decoding parametric automatically, solves existing video flowing
Switching method reconnects server the problem of easily producing interruption, reaches and saves existing video stream switching method and regarded at two
During frequency stream switching, direct broadcast server needs to disconnect the network connection corresponding to current video stream, resettles again corresponding to alternative
The network connection of video flowing, and need to re-read more spent by the related data (such as header file) of alternative videos stream
Time, connection need not be re-established by having reached, two video data streams can seamless switching, particularly two decoding parametrics not
Identical video data stream can be with the effect of seamless switching.
Embodiment six
Fig. 6 is refer to, the block diagram of the video flowing switching device provided it illustrates the embodiment of the present invention six.This is regarded
Frequency stream switching device can be implemented as the part in direct broadcast server or CDN network.The video flowing switching device, bag
Include：Label preserving module 420, speed acquisition module 436, switching judging module 438, time preserving module 432, parameter replace mould
Block 440, parameter sending module 460 and data transmission blocks 480.
Label preserving module 420, decoding parametric is included for preserving in the two-way or two-way above video flowing that receive
Video stream label；
Speed acquisition module 436, for obtaining the transmission rate towards video encoder；
Switching judging module 438, the transmission rate for being got according to the speed acquisition module 436 judge whether need
Alternative videos stream is switched to from current video stream；
Time preserving module 432, if the judging result specifically for the switching judging module 438 is when needing, to protect
Deposit last timestamp in institute's played data before being switched in the current video stream；
Parameter replacement module 440, if specifically for the switching judging module 438 judging result for need when,
Decoding parametric in the video stream label of the alternative videos stream preserved with the label preserving module 420 is replaced the label and is preserved
Decoding parametric in the video stream label for the current video stream that module 420 preserves；
Parameter sending module 460, the video after decoding parametric is replaced for sending described by parameter replacement module 440 and is failed to be sold at auction
Sign to video player；
Data transmission blocks 480, fail to be sold at auction for sending the video after replacing decoding parametric in the parameter sending module 460
After label, the data to be played in the alternative videos stream are sent to the video player.
The data transmission blocks 480, can include：Time modification unit 482 and data transmission unit 484；
The time modification unit 482, for changing institute's having time in the data to be played in the alternative videos stream
Stamp, makes amended timestamp be all higher than last timestamp that the time preserving module 432 preserves；
The data transmission unit 484, the video playing is given for the data sending to be played after modification time is stabbed
Device.
Further say, above-mentioned switching judging module 438, is specifically used for：
Detect whether the transmission rate is more than the first predetermined threshold；If detecting more than the first predetermined threshold, need
The alternative videos stream is switched to from the current video stream, the code check of the alternative videos stream is more than the current video stream
Code check；
And/or
Detect whether the transmission rate is less than the second predetermined threshold；If detecting less than the second predetermined threshold, need
The alternative videos stream is switched to from the current video stream, the code check of the alternative videos stream is less than the current video stream
Code check.
In conclusion video flowing switching device provided in an embodiment of the present invention, by using in replacement current video stream
Decoding parametric in video stream label, to allow video player to reset decoding parametric automatically, solves existing video flowing
Switching method reconnects server the problem of easily producing interruption, reaches and saves existing video stream switching method and regarded at two
During frequency stream switching, direct broadcast server needs to disconnect the network connection corresponding to current video stream, resettles again corresponding to alternative
The network connection of video flowing, and need to re-read more spent by the related data (such as header file) of alternative videos stream
Time, connection need not be re-established by having reached, two video data streams can seamless switching, particularly two decoding parametrics not
Identical video data stream can be with the effect of seamless switching.In addition, also adjusted by the network rate according to video player, dynamic
Whole video switching, can provide optimal result of broadcast for client.
Embodiment seven
Fig. 7 is refer to, the block diagram of the audio/video player system provided it illustrates the embodiment of the present invention seven.The video
Play system, including：At least two video flowings provide server 720, video flowing switching device 740 and include video player
Client 760.
At least two video flowings provide server 720 be used to provide respectively all the way video flowing to video flowing switching device 740,
Content, resolution ratio and the code check that each video flowing provides the video flowing that server 720 is provided to video flowing switching device 740 can be with
It is identical, can also be different.
Client 760 comprising video player is used for laggard in the data for receiving the transmission of video flowing switching device 740
Row video playing.
From Fig. 2A and Fig. 3 A, video flowing switching device 740 can be implemented as direct broadcast server, CDN network, live
The part in a part or CDN network in server.Wherein：
First, when video flowing switching device 740 is implemented as the part in direct broadcast server or direct broadcast server；
Two-way or two-way above video flowing, which are provided, by least two video flowings offer server 720 switches dress to video flowing
Put 740.Video flowing switching device 740 is specifically used for preserving in the two-way or two-way above video flowing received comprising decoding ginseng
Several video stream labels；When then switching to alternative videos stream from current video stream, with the video stream label of alternative videos stream
Decoding parametric replace current video stream video stream label in decoding parametric；Furthermore can via the transmission of CDN network,
The video stream label after the replacement decoding parametric is sent to the client 760 comprising video player；Finally, replacement is being sent
After video stream label after decoding parametric, it can also continue to send in the alternative videos stream via the transmission of CDN network
Data to be played give the client 760 comprising video player.
Second, when video flowing switching device 740 is implemented as the part in CDN network or CDN network；
At least two video flowings provide server 720 and send more than two-way or two-way video flowing, and can be via
After the transmission of direct broadcast server, send to video flowing switching device 740.Video flowing switching device 740, which is specifically used for preserving, to be received
To two-way or two-way above video flowing in include the video stream label of decoding parametric；Then switched to from current video stream standby
When selecting video flowing, in the video stream label that current video stream is replaced with the decoding parametric in the video stream label of alternative videos stream
Decoding parametric；Furthermore the video stream label after the replacement decoding parametric is sent to the client 760 comprising video player；
Finally, after the video stream label after replacing decoding parametric is sent, the data to be played in the alternative videos stream are also sent
To the client 760 comprising video player.
Those skilled in the art easily full of beard and, above-mentioned video flowing provide server 720 can also be example IV,
The video flowing that embodiment five or embodiment six provide provides server.
In conclusion audio/video player system provided in an embodiment of the present invention, by making video flowing switching device using replacement
The decoding parametric in video stream label in current video stream, to allow video player to reset decoding parametric automatically, solution
The existing video stream switching method of having determined reconnects the problem of server easily produces interruption, reaches and saves existing video flowing and cut
Method is changed when two video flowings switch, direct broadcast server needs to disconnect the network connection corresponding to current video stream, again again
The network connection corresponding to alternative videos stream is established, and needs to re-read related data (such as the head text of alternative videos stream
Part) spent by more time, connection need not be re-established by having reached, two video data streams can seamless switching, especially
It is that two different video data streams of decoding parametric can be with the effect of seamless switching.
It should be noted that：The video flowing switching device that above-described embodiment provides is in Switch Video stream, only with above-mentioned each
The division progress of function module, can be as needed and by above-mentioned function distribution by different work(for example, in practical application
Energy module is completed, i.e., the internal structure of equipment is divided into different function modules, to complete whole described above or portion
Divide function.In addition, the video flowing switching device that above-described embodiment provides belongs to same design with video stream switching method embodiment,
Its specific implementation process refers to embodiment of the method, and which is not described herein again.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (11)
- A kind of 1. video stream switching method, it is characterised in that the described method includes：Preserve the two-way that receives either in the two-way above video flowing video stream label two-way comprising decoding parametric or Two-way above video flowing provides server by different video flowings respectively and provides；When switching to alternative videos stream from current video stream, replaced with the decoding parametric in the video stream label of the alternative videos stream The decoding parametric in the video stream label of the current video stream is changed, the decoding parametric includes sequence parameter set SPS and image Parameter set PPS, the video stream label of the current video stream refer to after video sequence currently playing in current video stream First video stream label for including decoding parametric in next video sequence, the video stream label of the alternative videos stream are Refer to first video stream label for including decoding parametric in the video sequence being most recently received in alternative videos stream；The video stream label after being replaced decoding parametric is sent to video player；The data to be played in the alternative videos stream are sent to the video player.
- 2. video stream switching method according to claim 1, it is characterised in that the video with the alternative videos stream Before decoding parametric in stream label replaces the decoding parametric in the video stream label of the current video stream, further include：In the video stream label for judging the decoding parametric and the current video stream in the video stream label of the alternative videos stream Decoding parametric it is whether identical；If identical, the data to be played sent in the alternative videos stream are directly performed to the video player Step；If it is not the same, the decoding parametric replacement then performed in the video stream label with the alternative videos stream is described current The step of decoding parametric in the video stream label of video flowing.
- 3. video stream switching method according to claim 1 or 2, it is characterised in that described to send the alternative videos stream In data to be played give the video player before, further include：Preserve last timestamp in institute's played data before being switched in the current video stream；The data to be played sent in the alternative videos stream include to the video player, correspondence：All timestamps in the data to be played in the alternative videos stream are changed, are all higher than amended timestamp described Last timestamp preserved；Data sending to be played after modification time is stabbed gives the video player.
- 4. video stream switching method according to claim 1 or 2, it is characterised in that described to be switched to from current video stream Before alternative videos stream, further include：Obtain the transmission rate towards video encoder；Judge whether to need to switch to alternative videos stream from current video stream according to the transmission rate；If it is, the step of switching to alternative videos stream from current video stream described in performing.
- 5. video stream switching method according to claim 4, it is characterised in that described to be according to transmission rate judgement No needs switch to alternative videos stream from current video stream, specifically include：Detect whether the transmission rate is more than the first predetermined threshold；If detecting more than the first predetermined threshold, the alternative videos stream is switched to from the current video stream, it is described alternative The code check of video flowing is more than the code check of the current video stream；And/orDetect whether the transmission rate is less than the second predetermined threshold；If detecting less than the second predetermined threshold, the alternative videos stream is switched to from the current video stream, it is described alternative The code check of video flowing is less than the code check of the current video stream.
- 6. a kind of video flowing switching device, it is characterised in that described device includes：Label preserving module, for preserving the video flowing for including decoding parametric in the two-way or two-way above video flowing that receive Label, two-way or the two-way above video flowing provide server by different video flowings respectively and provide；Parameter replacement module, during for switching to alternative videos stream from current video stream, with the video flowing of the alternative videos stream Decoding parametric in label replaces the decoding parametric in the video stream label of the current video stream, and the decoding parametric includes sequence Row parameter set SPS and picture parameter set PPS, the video stream label of the current video stream refer to currently playing in current video stream Video sequence after next video sequence in first video stream label for including decoding parametric, the alternative videos First regarding comprising decoding parametric in the video sequence that the video stream label of stream refers to be most recently received in alternative videos stream Frequency stream label；Parameter sending module, for sending the video stream label after being replaced decoding parametric to video player；Data transmission blocks, for sending the data to be played in the alternative videos stream to the video player.
- 7. video flowing switching device according to claim 6, it is characterised in that the video flowing switching device, further includes：Parameter judgment module；The parameter judgment module, decoding parametric in video stream label for judging the alternative videos stream and described current Whether the decoding parametric in the video stream label of video flowing is identical；The data transmission blocks, if the judging result for being additionally operable to the parameter judgment module is identical, directly perform institute State the step of data to be played in the transmission alternative videos stream are to the video player；The parameter sending module, if the judging result specifically for the parameter judgment module is to differ, performs institute The decoding parametric stated in the video stream label with the alternative videos stream is replaced in the video stream label of the current video stream The step of decoding parametric.
- 8. the video flowing switching device according to claim 6 or 7, it is characterised in that the video flowing switching device, is also wrapped Include：Time preserving module；The time preserving module, for preserve be switched in the current video stream before last in institute played data when Between stab；The data transmission blocks, correspondence include：Time modification unit and data transmission unit；The time modification unit, for changing all timestamps in the data to be played in the alternative videos stream, makes to repair Timestamp after changing is all higher than last timestamp of the preservation；The data transmission unit, the video player is given for the data sending to be played after modification time is stabbed.
- 9. the video flowing switching device according to claim 6 or 7, it is characterised in that the video flowing switching device, is also wrapped Include：Speed acquisition module and switching judging module；The speed acquisition module, for obtaining the transmission rate towards video encoder；The switching judging module, for judging whether to need to switch to from current video stream alternatively to regard according to the transmission rate Frequency flows；The parameter replacement module, if the judging result for the switching judging module is yes, performs described from current Video flowing switches to the step of alternative videos stream.
- 10. video flowing switching device according to claim 9, it is characterised in that the switching judging module is specific to use In：Detect whether the transmission rate is more than the first predetermined threshold；If detecting more than the first predetermined threshold, need from institute State current video stream and switch to the alternative videos stream, the code check of the alternative videos stream is more than the code of the current video stream Rate；And/orDetect whether the transmission rate is less than the second predetermined threshold；If detecting less than the second predetermined threshold, need from institute State current video stream and switch to the alternative videos stream, the code check of the alternative videos stream is less than the code of the current video stream Rate.
- A kind of 11. audio/video player system, it is characterised in that the system comprises：At least two video flowings provide server, video Flow switching device and the client comprising video player；The video flowing switching device is the video flowing switching device as described in claim 6 to 10 is any.
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