CN101600092A - The generation of network video and player method and system - Google Patents
The generation of network video and player method and system Download PDFInfo
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- CN101600092A CN101600092A CNA2009101478096A CN200910147809A CN101600092A CN 101600092 A CN101600092 A CN 101600092A CN A2009101478096 A CNA2009101478096 A CN A2009101478096A CN 200910147809 A CN200910147809 A CN 200910147809A CN 101600092 A CN101600092 A CN 101600092A
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Abstract
The invention discloses a kind of generation and player method of network video, comprising: streaming media server is received after the video recording order, is preserved the source code flow file from head end encoder; Transcribe the source code flow file that the server convection media server preserves and decode, obtain original sequence, that original sequence is carried out N is doubly down-sampled, obtains the subsequence of corresponding frame per second, again the subsequence coding is obtained corresponding ASCII stream file ASCII; When a kind of times of speed of client-requested network video was play, streaming media server was pressed normal speed and is sent and the doubly corresponding ASCII stream file ASCII of speed of ask to client.The invention also discloses a kind of generation and Play System of network video.Adopt the present invention, can when client require doubly fast playing network video record, alleviate network burden and improve user's experience.
Description
Technical field
The present invention relates to multimedia network video technology, relate in particular to a kind of generation and player method and system of network video.
Background technology
Along with development of internet technology, a kind of new medium technique arises at the historic moment, stream media technology that Here it is.So-called Streaming Media is meant: use the continuous time-base media of stream transmission technology in network, as audio frequency, video or multimedia file, streaming media service can provide audio/video flow continuously for the user, to satisfy the online dynamically audio-visual demand of watching of user.
Network video all is widely used at numerous areas as a kind of important video information preserving type.As its name suggests, network video just is meant with the network to be the video record that intermediary stores and transmits.In addition, in actual applications, the often useful demand of playing fast greater than normal play speed of user; But, send fast if press the playback rate of being asked with will recording a video data integrity, tend to cause network blockage, thereby do not reach the effect of user expectation.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of generation and player method and system of network video, can alleviate network burden and improve user's experience when client require doubly fast playing network video record.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of generation of network video and player method comprise:
Streaming media server is received after the video recording order, is preserved the source code flow file from head end encoder;
Transcribe the source code flow file that the server convection media server preserves and decode, obtain original sequence, that original sequence is carried out N is doubly down-sampled, obtains the subsequence of corresponding frame per second, again the subsequence coding is obtained corresponding ASCII stream file ASCII;
When a kind of times of speed of client-requested network video was play, streaming media server was pressed normal speed and is sent and the doubly corresponding ASCII stream file ASCII of speed of ask to client.
Further, when described a kind of times of speed when the client-requested network video is play, streaming media server sends to client by normal speed and ask doubly with institute that the corresponding ASCII stream file ASCII of speed is specially: doubly speed broadcast of the N of client-requested network video, then streaming media server sends to client by normal speed with the doubly down-sampled ASCII stream file ASCII of generation afterwards of N.
Further, when described a kind of times of speed when the client-requested network video is play, streaming media server by normal speed to client send with institute ask doubly speed accordingly ASCII stream file ASCII be specially: the normal speed broadcast of client-requested network video, then streaming media server sends to client by normal speed with the source code flow file of preservation.
Further, after the subsequence coding was obtained corresponding ASCII stream file ASCII, described method further comprised:
Encapsulate ASCII stream file ASCII, and the down-sampled position of each two field picture in original sequence is kept in the timestamp information of wrapper.
Further, described method further comprises:
When the client-requested network video from a kind of times of speed play switch to another kind of doubly when speed is play, the streaming media server basis is the timestamp information of transmitted stream file, searching corresponding position in the ASCII stream file ASCII accordingly with this another kind is doubly fast, and beginning to send and the doubly fast ASCII stream file ASCII accordingly of this another kind by normal speed from the position that finds.
Further, described another kind times speed is: a kind of or normal speed in N times of speed.
Further, described N is doubly down-sampled is specially: take out a frame from the every N frame of original sequence; Wherein, the value of described N is 2,4,8 or this three's combination in any.
A kind of generation of network video and Play System comprise streaming media server and transcribe server, wherein:
Streaming media server is used to receive after the video recording order, preserves the source code flow file from head end encoder;
Transcribe server, be used for the source code flow file that convection media server preserves and decode, obtain original sequence, that original sequence is carried out N is doubly down-sampled, obtains the subsequence of corresponding frame per second, again the subsequence coding is obtained corresponding ASCII stream file ASCII;
Described streaming media server also is used for pressing normal speed and sending and the doubly corresponding ASCII stream file ASCII of speed of ask to client when a kind of times of speed of client-requested network video is play.
Further, the described server of transcribing also is used for: after the subsequence coding is obtained corresponding ASCII stream file ASCII, encapsulate ASCII stream file ASCII, and the down-sampled position of each two field picture in original sequence is kept in the timestamp information of wrapper.
Further, described streaming media service also is used for: when the client-requested network video from a kind of times of speed play switch to another kind of doubly when speed is play, the streaming media server basis is the timestamp information of transmitted stream file, searching corresponding position in the ASCII stream file ASCII accordingly with this another kind is doubly fast, and beginning to send and the doubly fast ASCII stream file ASCII accordingly of this another kind by normal speed from the position that finds.
As can be seen from the above technical solutions, streaming media server is by down-sampled generation and the multiple times of corresponding ASCII stream file ASCII of speed of multiple times of speed, when N times of speed of client-requested network video is play, streaming media server need not the doubly fast source code flow file that sends by N, and only need by normal speed the doubly down-sampled ASCII stream file ASCII that generates afterwards of N to be sent to client, can alleviate network burden like this and improve user's experience.
In addition, when the playback rate of client-requested network video switches to another kind of times of speed by a kind of times of speed, streaming media server can be according to the timestamp information of transmitted stream file, doubly searching corresponding position in the corresponding ASCII stream file ASCII of speed with another kind, and begin from the position that finds to send and this another kind corresponding ASCII stream file ASCII of speed doubly, thereby accomplish seamless switching by normal speed.
Description of drawings
Fig. 1 plays the deployment diagram of applied environment for network video of the present invention;
Fig. 2 is the generation and the player method schematic flow sheet of network video of the present invention;
Fig. 3 is the generation and the broadcast embodiment schematic flow sheet of network video of the present invention;
Fig. 4 is the generation and the Play System structural representation of network video of the present invention.
Embodiment
Before the generation and player method of describing network video of the present invention in detail, simply introduce earlier the concrete applied environment that network video of the present invention is play.As shown in Figure 1, this applied environment comprises: client 10, content distributing network (CDN) server 20, transcribe server 30, streaming media server 40, encoder 50 and camera 60.When a record task such as the initiation of timing record task, at first send the video recording order by network to streaming media server 40 by CDN server 20; Then streaming media server 40 begins to preserve the source code flow file from head end encoder 50, the source code flow file of transcribing 30 pairs of preservations of server is decoded, down-sampled, recompile, thereby obtains playing to corresponding times of speed the ASCII stream file ASCII of client 10.Wherein, encoder 50 is the equipment 60 that be connected with camera, that stream medium data can be provided.
As shown in Figure 2, the generation of network video of the present invention and player method may further comprise the steps:
Step 201, the CDN server sends the video recording order to streaming media server.
Step 202, streaming media server are received after the video recording order, are begun to preserve the ASCII stream file ASCII from head end encoder.
Wherein, head end encoder from the streaming media server link setup, send ASCII stream file ASCII to streaming media server always.Here, will be called the source code flow file from the ASCII stream file ASCII of head end encoder.
Step 203 is transcribed the source code flow file that the server convection media server preserves and is decoded, and obtains original sequence, and it is doubly down-sampled that original sequence is carried out N, obtains the subsequence of corresponding frame per second, again the subsequence coding is obtained corresponding ASCII stream file ASCII.
Here, transcribe data interaction between server and the streaming media server with an example simple declaration, but not as limit.Generally, transcribe server and streaming media server and have a public memory space; Streaming media server is kept at the source code flow file on this public memory space, transcribe server and just can directly read this source code flow file from this public memory space, and then to its decode, down-sampled, recompile, to obtain new ASCII stream file ASCII; This new ASCII stream file ASCII equally also is kept on this public memory space, and streaming media server can directly read this new ASCII stream file ASCII.
In the practical application, after the subsequence coding is obtained corresponding ASCII stream file ASCII, just can transmit after also ASCII stream file ASCII need being packed.So-called packing is meant: ASCII stream file ASCII is encapsulated by certain agreement.And the present invention is kept at the down-sampled position of each two field picture in original sequence in the timestamp information of wrapper when the encapsulation ASCII stream file ASCII.
Doubly down-sampled being meant of described N taken out a frame from the every N frame of original sequence, the ASCII stream file ASCII size that obtains like this is the 1/N of source code flow file size.
Wherein, according to actual conditions, the value of N is generally 2,4,8 or this three's combination in any.
In addition, on the basis that reduces frame per second, can also further reduce the ASCII stream file ASCII size by reducing modes such as resolution, code check when transcribing, this is a prior art, does not repeat them here.Wherein, transcribe decoding, the down-sampled and cataloged procedure that is meant described in the step 203.
Step 204, when the user in client when a kind of times of streaming media server request network video speed play, streaming media server press normal speed and is sent with institute to client and ask doubly fast ASCII stream file ASCII accordingly.
Here, when streaming media server sends with institute to client and ask doubly speed accordingly during ASCII stream file ASCII pressing normal speed, client can obtain the doubly effect of fast broadcast.
This step comprises two kinds of situations: a kind of situation is, the N of client-requested network video doubly speed plays, then streaming media server does not need the doubly fast source code flow file that sends by N, but the doubly down-sampled ASCII stream file ASCII that generates afterwards of N is sent to client, thereby can not increase network burden by normal speed.Because human vision property, the network video that this dual mode obtains is similar in the effect of client terminal playing; Another kind of situation is that if the normal speed of client-requested network video is play, then streaming media server directly sends to client by normal speed with the source code flow file of preserving.
Step 205, when the client-requested network video from a kind of times of speed play switch to another kind of doubly when speed is play, the streaming media server basis is the timestamp information of transmitted stream file, searching corresponding position in the ASCII stream file ASCII accordingly with this another kind is doubly fast, and beginning to send and the doubly fast ASCII stream file ASCII accordingly of this another kind by normal speed from the position that finds.
Searching corresponding position described in this step can be: suppose basis the timestamp information of transmitted stream file learn that the image of current transmission is the 100th frame of original sequence, then by certain means read in the corresponding ASCII stream file ASCII of another kind of doubly speed in the 100th frame, afterwards, send and the doubly fast corresponding ASCII stream file ASCII of this another kind by normal speed since the 100th frame.
Because timestamp information has reflected the position of two field picture in original sequence of current transmission, so the ASCII stream file ASCII of each times speed all has the unified time benchmark, thereby can accomplish seamless switching when speed switching doubly.
Wherein, that doubly speed can be in the N times of speed is a kind of for this another kind; Also can be normal speed, promptly streaming media server directly sends to client with the source code flow file.
Here, need to prove that in above-mentioned flow process, step 204 or 205 can only be carried out a wherein step, also can all carry out in two steps; If two the step all carries out, then step 204,205 actual do not have front and back order branches.
Below by a specific embodiment technical scheme of the present invention is described in further detail.
As shown in Figure 3, the generation of network video and broadcast embodiment may further comprise the steps:
Step 301, when one regularly record task began, the CDN server sent HTTP(Hypertext Transport Protocol) message to streaming media server, carried the video recording order in this HTTP message.
Step 302, streaming media server are received after the video recording order, are begun to preserve the source code flow file S0 from head end encoder.
In the present embodiment, the frame per second of this source code flow file S0 was 25 frame/seconds, and coded system is for H.264.
Step 303, H.264, the source code flow file S0 that transcribes the preservation of server convection media server decodes, obtain original sequence, original sequence is carried out 2,4 and 8 three kind of speed down-sampled doubly, obtain the subsequence that frame per second was respectively for 12,6 and 3 frame/seconds, by encoder H.264 these subsequences codings are obtained corresponding ASCII stream file ASCII S2, S4 and S8 again; And when encapsulation ASCII stream file ASCII S2, S4, S8, respectively the position of each two field picture in original sequence of 2,4 and 8 times of prompt drops samplings is kept in the timestamp information of wrapper separately.
Wherein, H.263 the coded system of ASCII stream file ASCII can also be used, coded system such as Mpeg4 except H.264.And, in other embodiments, can be only original sequence be carried out 2,4 and 8 three kind of one or both among speed down-sampled doubly.
Step 304, client sends HTTP redirection message to the CDN server, with URL(uniform resource locator) (URL) address that obtains streaming media server.
Step 305, the CDN server sends HTTP message to client, wherein carries the URL address of streaming media server.
Step 306, according to the URL address of the streaming media server of receiving, client to the streaming media server request with normal speed playing network video record.
Step 307, the playing request of streaming media server customer in response end is set up real time streaming protocol (rtsp) with client and is connected, and presses normal speed afterwards and sends the source code flow file S0 that preserves to client.
In the present embodiment, streaming media server comes the transmission code stream file by real time transport protocol (RTP), certainly, also can pass through other mode transmission code stream files.
In step 306, client also can be asked with other times speed as 4 times of fast playing network video records, and is corresponding, in step 307, streaming media server then should by normal speed to client send 4 times down-sampled after the ASCII stream file ASCII S4 of generation.
Step 308, when client was wished with 2 times of fast playing network video records, client sent to streaming media server with broadcast (Play) signaling of 2 times of speed by RTSP.
Step 309, after times speed of knowing request, streaming media server is searched corresponding position according to the timestamp information of the source code flow file S0 that has sent in ASCII stream file ASCII S2, begins from the position that finds to send ASCII stream file ASCII S2 by normal speed.
Step 310 when client wishes to switch to normal speed, also sends to streaming media server with the Play signaling of normal speed by RTSP.
Step 311, after times speed of knowing request, the streaming media server basis is the timestamp information of transmitted stream file S2, searches corresponding position in source code flow file S0, begins from the position that finds to send source code flow file S0 by normal speed.
Here, need to prove, in above-mentioned flow process, step 308 and 309 or step 310 and 311 can only carry out one, in above-mentioned flow process these steps all being listed is in order to illustrate: in actual applications, the user can repeatedly be switched playback rate according to self needs.
In addition, when client required to stop the playing network video record, client sent termination (Teardown) signaling of RTSP to streaming media server; Streaming Media stops the playing network video record according to the Teardown order of receiving.
In the above-described embodiments, CDN server and client, streaming media server communicate by the HTTP mode, but also can use transmission control protocol (TCP) to wait other modes according to different network condition.Streaming media server and client, encoder pass through the RTSP command transmitting, pass through the RTP transmission code stream, but also can use other mode command transmitting and code streams.
Be to realize said method, corresponding generation and the Play System that a kind of network video is provided of the present invention, as shown in Figure 4, this system comprises streaming media server 40 and transcribes server 30, wherein:
Streaming media server 40 is used to receive after the video recording order, preserves the source code flow file from head end encoder;
Transcribe server 30, the source code flow file that is used for convection media server 40 preservations is decoded, obtain original sequence, that original sequence is carried out N is doubly down-sampled, obtains the subsequence of corresponding frame per second, again subsequence is obtained generating corresponding ASCII stream file ASCII;
Described streaming media server 40 also is used for pressing normal speed and sending and the doubly corresponding ASCII stream file ASCII of speed of ask to client when a kind of times of speed of client-requested network video is play.
Wherein, the described server 30 of transcribing also is used for: after the subsequence coding is obtained corresponding ASCII stream file ASCII, encapsulate ASCII stream file ASCII, and the down-sampled position of each two field picture in original sequence is kept in the timestamp information of wrapper.
Wherein, described streaming media service 40 also is used for: when the client-requested network video from a kind of times of speed play switch to another kind of doubly when speed is play, streaming media server 40 bases are the timestamp information of transmitted stream file, searching corresponding position in the ASCII stream file ASCII accordingly with this another kind is doubly fast, and beginning to send and the doubly fast ASCII stream file ASCII accordingly of this another kind by normal speed from the position that finds.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1, a kind of generation of network video and player method is characterized in that, this method comprises:
Streaming media server is received after the video recording order, is preserved the source code flow file from head end encoder;
Transcribe the source code flow file that the server convection media server preserves and decode, obtain original sequence, that original sequence is carried out N is doubly down-sampled, obtains the subsequence of corresponding frame per second, again the subsequence coding is obtained corresponding ASCII stream file ASCII;
When a kind of times of speed of client-requested network video was play, streaming media server was pressed normal speed and is sent and the doubly corresponding ASCII stream file ASCII of speed of ask to client.
2, the generation of network video according to claim 1 and player method, it is characterized in that, when described a kind of times of speed when the client-requested network video is play, streaming media server sends to client by normal speed and ask doubly with institute that the corresponding ASCII stream file ASCII of speed is specially: doubly speed broadcast of the N of client-requested network video, then streaming media server sends to client by normal speed with the doubly down-sampled ASCII stream file ASCII of generation afterwards of N.
3, the generation of network video according to claim 1 and player method, it is characterized in that, when described a kind of times of speed when the client-requested network video is play, streaming media server by normal speed to client send with institute ask doubly speed accordingly ASCII stream file ASCII be specially: the normal speed broadcast of client-requested network video, then streaming media server sends to client by normal speed with the source code flow file of preservation.
According to the generation and the player method of claim 1,2 or 3 described network videos, it is characterized in that 4, after the subsequence coding was obtained corresponding ASCII stream file ASCII, described method further comprised:
Encapsulate ASCII stream file ASCII, and the down-sampled position of each two field picture in original sequence is kept in the timestamp information of wrapper.
5, the generation of network video according to claim 4 and player method is characterized in that, described method further comprises:
When the client-requested network video from a kind of times of speed play switch to another kind of doubly when speed is play, the streaming media server basis is the timestamp information of transmitted stream file, searching corresponding position in the ASCII stream file ASCII accordingly with this another kind is doubly fast, and beginning to send and the doubly fast ASCII stream file ASCII accordingly of this another kind by normal speed from the position that finds.
6, the generation of network video according to claim 5 and player method is characterized in that, described another kind times speed is: a kind of or normal speed in N times of speed.
7, the generation of network video according to claim 1 and player method is characterized in that, described N is doubly down-sampled to be specially: take out a frame from the every N frame of original sequence;
Wherein, the value of described N is 2,4,8 or this three's combination in any.
8, a kind of generation of network video and Play System is characterized in that, this system comprises streaming media server and transcribe server, wherein:
Streaming media server is used to receive after the video recording order, preserves the source code flow file from head end encoder;
Transcribe server, be used for the source code flow file that convection media server preserves and decode, obtain original sequence, that original sequence is carried out N is doubly down-sampled, obtains the subsequence of corresponding frame per second, again the subsequence coding is obtained corresponding ASCII stream file ASCII;
Described streaming media server also is used for pressing normal speed and sending and the doubly corresponding ASCII stream file ASCII of speed of ask to client when a kind of times of speed of client-requested network video is play.
9, the generation of network video according to claim 8 and Play System, it is characterized in that, the described server of transcribing also is used for: after the subsequence coding is obtained corresponding ASCII stream file ASCII, encapsulate ASCII stream file ASCII, and the down-sampled position of each two field picture in original sequence is kept in the timestamp information of wrapper.
10, the generation of network video according to claim 9 and Play System, it is characterized in that, described streaming media service also is used for: when the client-requested network video from a kind of times of speed play switch to another kind of doubly when speed is play, the streaming media server basis is the timestamp information of transmitted stream file, searching corresponding position in the ASCII stream file ASCII accordingly with this another kind is doubly fast, and beginning to send and the doubly fast ASCII stream file ASCII accordingly of this another kind by normal speed from the position that finds.
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| CNA2009101478096A CN101600092A (en) | 2009-06-12 | 2009-06-12 | The generation of network video and player method and system |
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| CN101901126A (en) * | 2010-07-12 | 2010-12-01 | 东北大学 | Method for controlling combined large-screen stream media playing computer |
| WO2011088671A1 (en) * | 2010-01-20 | 2011-07-28 | 中兴通讯股份有限公司 | Method and apparatus for transcribing multimedia broadcasting program |
| CN102143384A (en) * | 2010-12-31 | 2011-08-03 | 华为技术有限公司 | Method, device and system for generating media file |
| CN102469312A (en) * | 2010-11-04 | 2012-05-23 | 株式会社东芝 | Image decoding apparatus and non-transitory computer readable medium |
| CN103313091A (en) * | 2012-09-27 | 2013-09-18 | 中兴通讯股份有限公司 | Speed-multiplying playing method, device and system |
| CN104602117A (en) * | 2015-01-31 | 2015-05-06 | 华为技术有限公司 | Double-speed video playing method and device |
| CN104702975A (en) * | 2015-03-24 | 2015-06-10 | 北京中熙正保远程教育技术有限公司 | Flash video variable-speed playing method for remote teaching |
| CN106454417A (en) * | 2016-11-11 | 2017-02-22 | 青岛海信宽带多媒体技术有限公司 | Streaming media speed multiplication playing method and apparatus |
| CN107277412A (en) * | 2017-07-24 | 2017-10-20 | 腾讯科技（深圳）有限公司 | Video recording method and device, graphics processor and electronic equipment |
| CN108111532A (en) * | 2018-01-05 | 2018-06-01 | 上海小蚁科技有限公司 | The control method for playing back and device of video stream data, storage medium, terminal |
| WO2021217422A1 (en) * | 2020-04-28 | 2021-11-04 | Qualcomm Incorporated | Streaming server supporting broadcast of content streams |
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| WO2011088671A1 (en) * | 2010-01-20 | 2011-07-28 | 中兴通讯股份有限公司 | Method and apparatus for transcribing multimedia broadcasting program |
| CN101901126A (en) * | 2010-07-12 | 2010-12-01 | 东北大学 | Method for controlling combined large-screen stream media playing computer |
| CN101901126B (en) * | 2010-07-12 | 2012-01-04 | 东北大学 | Method for controlling combined large-screen stream media playing computer |
| CN102469312A (en) * | 2010-11-04 | 2012-05-23 | 株式会社东芝 | Image decoding apparatus and non-transitory computer readable medium |
| CN102143384A (en) * | 2010-12-31 | 2011-08-03 | 华为技术有限公司 | Method, device and system for generating media file |
| WO2012089014A1 (en) * | 2010-12-31 | 2012-07-05 | 华为技术有限公司 | Method, device and system for generating media file |
| CN102143384B (en) * | 2010-12-31 | 2013-01-16 | 华为技术有限公司 | Method, device and system for generating media file |
| WO2014048198A1 (en) * | 2012-09-27 | 2014-04-03 | 中兴通讯股份有限公司 | Multi-speed playing method, device and system |
| CN103313091A (en) * | 2012-09-27 | 2013-09-18 | 中兴通讯股份有限公司 | Speed-multiplying playing method, device and system |
| CN104602117A (en) * | 2015-01-31 | 2015-05-06 | 华为技术有限公司 | Double-speed video playing method and device |
| CN104602117B (en) * | 2015-01-31 | 2018-03-16 | 华为技术有限公司 | A kind of speed plays the method and device of video |
| CN104702975A (en) * | 2015-03-24 | 2015-06-10 | 北京中熙正保远程教育技术有限公司 | Flash video variable-speed playing method for remote teaching |
| CN106454417A (en) * | 2016-11-11 | 2017-02-22 | 青岛海信宽带多媒体技术有限公司 | Streaming media speed multiplication playing method and apparatus |
| CN106454417B (en) * | 2016-11-11 | 2019-08-09 | 青岛海信宽带多媒体技术有限公司 | Streaming Media speed playback method and device |
| CN107277412A (en) * | 2017-07-24 | 2017-10-20 | 腾讯科技（深圳）有限公司 | Video recording method and device, graphics processor and electronic equipment |
| CN108111532A (en) * | 2018-01-05 | 2018-06-01 | 上海小蚁科技有限公司 | The control method for playing back and device of video stream data, storage medium, terminal |
| WO2021217422A1 (en) * | 2020-04-28 | 2021-11-04 | Qualcomm Incorporated | Streaming server supporting broadcast of content streams |
| CN114173202A (en) * | 2021-11-23 | 2022-03-11 | 武汉市烽视威科技有限公司 | RTSP (real time streaming protocol) -based continuous speed doubling playing method and related equipment |
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