CN101282348A

CN101282348A - Method for implementing flow medium function using HTTP protocol

Info

Publication number: CN101282348A
Application number: CNA2007100392313A
Authority: CN
Inventors: 向荣
Original assignee: Shanghai Chenxing Electronics Science and Technology Co Ltd
Current assignee: Shanghai Chenxing Electronics Science and Technology Co Ltd
Priority date: 2007-04-06
Filing date: 2007-04-06
Publication date: 2008-10-08
Anticipated expiration: 2027-04-06
Also published as: CN101282348B

Abstract

A method of applying HTTP protocol to implement the stream media function includes the following steps: S1, a server terminal dividing a video document into a plurality of small video segments; S2, the server terminal providing hyperlinks for the video document in a web page; S3, a client starting the visit website of a browser and obtaining the predetermined URL format document; S4, applying the HTTP protocol to transmit GET command to the server, and fetching the content-Length of the returned information protocol field; S5, the client beginning to receive download data, memorizing the received data on a terminal memory device, and playing by a terminal player; S6, the client going on downloading other video segments in turn while playing the first video segment till end. The invention has the advantages of resolving the defect of bad video transmission quality in the prior art and being capable of guaranteeing the final quality of video playing.

Description

The utilization http protocol is realized the method for flow medium function

Technical field

The present invention relates to a kind of stream media technology, particularly a kind of method that realizes flow medium function about the utilization http protocol.

Background technology

Traditional stream media technology needs special-purpose streaming media server and host-host protocol.Server moves real-time stream protocol (RTSP), with the required control information of exchange A/V transmission, after treating to connect with client, server uses the RTP/UDP agreement to give the A/V CLIENT PROGRAM with the A/V transfer of data, in case A/V data arrives client, the A/V CLIENT PROGRAM can be play output.The information of losing is left in the basket owing to make mistakes, make network congestion or when going wrong, it is very poor that video quality becomes, use http protocol to come the transport stream media data then because the packet of network loss can transmit until the user again receives, so can guarantee the final mass of video playback, therefore, it is used for being transmitted high-quality short-movie section.

Summary of the invention

In sum, how guaranteeing video transmission quality, is technical problem to be solved by this invention, for this reason, the object of the present invention is to provide a kind of method of using http protocol to realize flow medium function.

Technical scheme of the present invention is as follows:

According to a kind of method of using http protocol to realize flow medium function of the present invention, comprise step:

S ₁, server end is cut into a plurality of little video segments that can play separately, S with video file ₂, server end provides hyperlink to described video file in webpage, give a specific URL address, S ₃, client terminal start-up browser access website, obtain the URL formatted file pre-define, S ₄, client utilization http protocol sends the GET order to server, and according to the server end return information, the content-Length that extracts in the protocol fields judges whether the server end data download success, S ₅, client begins to receive data download, and data that receive is kept on the terminal storage equipment, judges that according to file in download length first video segment downloads successfully, and by terminal player broadcast, S ₆, client continues to download successively other video segment when playing first video segment, until end.

More specifically, described step S ₁In, video file is the 3GP file, and it is cut into n little file, and the naming rule of filename is to add 1 successively according to first clip file name;

The described hyperlink that is implemented in the video file in the webpage by given URL address is meant that defining video file format earlier is URL, and it starts with RTTP, shape such as RTTP: // .../ ^{* *}01.3gp, by adding 1 rule successively, RTTP is replaced to HTTP, URL is become HTTP: // .../ ^{* *}01.3gp form.

Advantage of the present invention is, solved prior art in Network Transmission, lost packet owing to makeing mistakes, and causes the problem of video playing quality difference, the packet of losing can be transmitted up to the user again receive, thereby guaranteed the final mass of video playback.

Description of drawings

Fig. 1 is the server process schematic diagram of embodiment.

Fig. 2 is the client realization flow figure of embodiment.

Embodiment

Provide better embodiment of the present invention according to Fig. 1 and Fig. 2 below, and described in detail,, rather than be used for limiting scope of the present invention so that those skilled in the art can understand the inventive method feature and function characteristics better.

At first be that server end need be cut into video file the some little video clips that can play separately, as shown in Figure 1, a 3GP file is divided into n little file, the filename of each small documents need be according to certain rule, such as adding 1 successively in order, promptly the 3gp file shown in Fig. 1 add 1 arrangement title according to the order of sequence: ^{* *}01.3gp, ^{* *}02.3gp ... ^{* *}(n-1) .3gp, ^{* *}N.3gp, corresponding to a 3GP video file cutting n little file.The benefit of doing like this is to make things convenient for client can just know the filename of next segment according to the filename of first segment.In addition, server end also need be given hyperlink of video file in webpage, in order to distinguish the hyperlink in other webpage, need give its specific URL address, and such as with RTTP beginning, shape is as RTTP: // .../ ^{* *}01.3gp.Like this, client runs into the link of RTTP beginning just know how this does when surfing the web, and obviously, the video file of 1～N small fragment is by name: RTTP: // .../ ^{* *}01.3gp, RTTP: // .../ ^{* *}02.3gp ... RTTP: // .../ ^{* *}(n-1) .3gp, RTTP: // .../ ^{* *}N.3gp.

Be exactly the work that client need be done then, as shown in Figure 2, obtain the URL file (step 1001,1002) of the form that pre-defines when the client starts browser and surfs the web, such as with the RTTP beginning, shape is as RTTP: // .../ ^{* *}01.3gp.What at first need to do replaces with HTTP with RTTP exactly, and URL becomes HTTP: // .../ ^{* *}01.3gp, use http protocol to send GET order (step 1003) then to server, if this moment, server did not have out of order words will return HTTP 1.1 200OK (step 1004), and more subsidiary protocol fields, client need extract (step 1005) with the Content-Length in the protocol fields, because next the data that receive of client will judge whether to download and finish by length.Next client just begins to prepare to receive data, and be kept on the memory device of its terminal (step 1006), because the restriction of network packet, whole small pieces needs several packets transmission just can finish, client can write down downloaded files length altogether, before its value equals during the Content-Length of record, just think that first video clips downloads successfully, the player that can open terminal begins to play, and continues to download other video clips (step 1007,1008) when playing.

After first segment begins to play, will divide the URL address that the rule of small fragment is learnt next segment according to server end, if be HTTP such as the URL of first segment: // .../ ^{* *}01.3gp the URL of so ensuing segment is HTTP: // .../ ^{* *}02.3gp, the utilization http protocol sends the GET order, the action of the analysis protocol fields before repeating, second segment download finished, when finishing, first segment just can play second segment immediately, the sensation of giving the terminal use like this is exactly smooth playing while downloading, and deletes the shared memory space of first segment simultaneously with recycling.Repeat said process step (1008～1004,1005,1006,1007), after sending the GET order, obtain HTTP 1.1 400not found (step 1004, step 1009), showing that the whole video file has all been downloaded finishes, the thread of downloading just can stop, and waits for playing last video clips, has so just realized the function of Streaming Media.

Claims

1. method of using http protocol to realize flow medium function comprises step:

S ₁, server end is cut into a plurality of little video segments that can play separately, S with video file ₂, server end provides hyperlink to described video file in webpage, give a specific URL address, S ₃, client terminal start-up browser access website, obtain the URL formatted file pre-define, S ₄, client utilization http protocol sends the GET order to server, and according to the server end return information, the content-Length that extracts in the protocol fields comes judgment data whether to download success, S ₅, client begins to receive data download, and data that receive is kept on the terminal storage equipment, judges that according to file in download length first video segment downloads successfully, and by terminal player broadcast, S ₆, client continues to download successively other video segment when playing first video segment, until end.

2. utilization http protocol according to claim 1 is realized the method for flow medium function, it is characterized in that described step S ₁In, video file is the 3GP file, and it is cut into n little file, and the naming rule of filename is to add 1 successively according to first clip file name.

3. utilization http protocol according to claim 1 and 2 is realized the method for flow medium function, it is characterized in that, the described hyperlink that is implemented in the video file in the webpage by given URL address is meant that defining video file format earlier is URL, and it starts with RTTP, shape such as RTTP: // .../ ^{* *}01.3gp, by adding 1 rule successively, RTTP is replaced to HTTP, URL is become HTTP: // .../ ^{* *}01.3gp form.