CN105323597A - MP4 file playing method, MP4 file processing method, MP4 file playing device, MP4 file processing device and MP4 file playing system - Google Patents
MP4 file playing method, MP4 file processing method, MP4 file playing device, MP4 file processing device and MP4 file playing system Download PDFInfo
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Abstract
The invention discloses a MP4 file playing method, a MP4 file processing method, a MP4 file playing device, a MP4 file processing device and a MP4 file playing system, and relates to the technical field of multimedia. The MP4 file playing method comprises the following steps of: acquiring an index file header of a MP4 file from a server, wherein the MP4 file is fragmented into a plurality of fragments, and the index file header comprises a fragment file header index of each fragment; acquiring fragment file headers from the sever according to the fragment file header index; and acquiring and playing the fragments from the server according to the fragment file headers. By means of fragmenting the MP4 file and forming the fragment file headers, the file headers which need to be downloaded when playing of a player starts can be reduced, time for waiting for downloading of the file headers when playing starts is shortened, and thus, starting speed of a video is accelerated.
Description
Technical field
The present invention relates to multimedia technology field, particularly a kind of MP4 (MovingPictureExpertsGroup4, dynamic image expert group) document play-back method, processing method and device and Play System.
Background technology
MP4 file format is the main flow form that current each large audio-visual website uses, and client progressively obtains MP4 file from server and plays.MP4 file has a most important part to be called file header.Do not comprise concrete media data in file header, but comprise the macroscopic description information of all media datas in MP4 file, have recorded creation-time, modification time, time measure scale, can playing duration etc., and the specifying information of each media track in file.MP4 file needs by coordinating the information in file header to play.
In the prior art, player will play the content of a MP4 form, just first needs download file head, only has after having downloaded file header, could obtain the necessary information play, and it is long that player plays starts the stand-by period.
Summary of the invention
The object of the invention is to the problem of the player plays stand-by period length solving MP4 file.
The present invention proposes a kind of MP4 document play-back method, comprising: the index file head obtaining MP4 file from server, and wherein, MP4 file is split as multiple burst, and index file head comprises the slicing files head index of each burst; Slicing files head is obtained according to slicing files head index; Obtain according to slicing files head and play burst.
Further, slicing files head index is the allocation index of slicing files head or the path indexing of storage slicing files leading address.
Further, index file head also comprises the time range of each burst; The method also comprises: the drag operation of response user, determines according to slicing files head index the burst dragging place, position; Send to server and obtain fragment request, obtain fragment request and comprise the request that corresponding burst and user drag positional information.
MP4 document play-back method of the present invention can make client can play corresponding burst after download completes single slicing files head.Due to the size of file header and the length positive correlation of MP4 file, after MP4 file fragmentation, the slicing files head length of each burst is less than the length of former MP4 file header; Under the index of indexed file head, MP4 file can be transmitted with the form of burst, complete broadcasting.By such mode, shorten the time starting and play front download file head, reach the object improving video toggle speed.
The present invention also proposes a kind of MP4 document handling method, comprising: the index file head sending MP4 file to client, and wherein, MP4 file is cut into multiple burst, and index file head comprises the slicing files head index of each burst; Slicing files head is sent to client; The burst corresponding with slicing files head is sent so that client plays corresponding burst according to slicing files head to client.
Further, slicing files head index is the allocation index of slicing files head or the path indexing of storage slicing files leading address.
Further, the burst of MP4 file is logic burst, slicing files head and corresponding burst Separate Storage.
Further, slicing files head and the corresponding burst Coutinuous store of MP4 file, and slicing files head is positioned at the front end of corresponding burst.
Further, judge the locating information whether comprising response user dragging in fragment request, if comprise locating information, then according to the initial address of locating information determination corresponding content in burst, generate new slicing files head.
Further, judge the locating information whether comprising response user dragging in fragment request, if comprise locating information, then according to locating information again burst, and generate new slicing files head.
MP4 document handling method of the present invention can make server end can play corresponding burst in client after be sent completely single slicing files head to client.Size due to slicing files head is less than the file header of former MP4 file, server sends to client the time that the single slicing files head time used is less than transmission original head, by such mode, shorten to start and play the front time sending file header, reach the object of the toggle speed improving video.
The present invention also proposes a kind of MP4 file playing device, comprising: index receiver module, and for reception hint file header, wherein, MP4 file is cut into multiple burst, and index file head comprises the slicing files head index of each burst; Slicing files head receiver module, for receiving slicing files head; Fragment receiver module, for receiving burst corresponding to slicing files head; Playing module, for playing burst according to slicing files head.
Further, slicing files head index is the allocation index of slicing files head or the path indexing of storage slicing files leading address.
Further, MP4 file playing device also comprises interactive module, for responding the drag operation of user, determines to drag the burst that is positioned at of position according to slicing files head index, sends and comprises the request that corresponding burst and user drag positional information.
MP4 file playing device of the present invention, slicing files head, MP4 file fragmentation is received under can realizing the index of indexed file head, reduce video and start the file header needing to download, thus shortening video starts the time needing to wait for, reach the object accelerating MP4 file broadcasting toggle speed.
The present invention also comprises a kind of MP4 document handling apparatus, comprising: index sending module, and for sending index file head, wherein MP4 file is cut into multiple burst, and index file head comprises the slicing files head index of each burst; Slicing files head sending module, for sending slicing files head; Burst sending module, for sending the burst corresponding with slicing files head.
Further, slicing files head index is the allocation index of slicing files head or the path indexing of storage slicing files leading address.
Further, the burst of MP4 file is logic burst, slicing files head and corresponding burst Separate Storage.
Further, slicing files head and the corresponding burst Coutinuous store of MP4 file, and slicing files head is positioned at the front end of corresponding burst.
Further, MP4 document handling apparatus also comprises: request judge module, for judging the locating information whether comprising response user dragging in fragment request; Update module, for according to the initial address of locating information determination corresponding content in burst, generates new slicing files head.
Further, MP4 document handling apparatus also comprises: request judge module, for judging the locating information whether comprising response user dragging in fragment request; Update module, for according to locating information again burst, and generates new file header.
Slicing files head, MP4 file fragmentation is sent under MP4 document handling apparatus of the present invention can realize the index of indexed file head, reduce video and start the file header needing to send, thus shorten the time that video starts needs wait, reach and accelerate the object that toggle speed play by MP4 file.
In addition, the present invention also proposes a kind of MP4 file playing system, comprises MP4 file playing device noted earlier and MP4 document handling apparatus.
Realized the file header needed when reducing MP4 file start by such system, and under the index of indexed file head, complete the broadcasting of whole MP4 file, thus reach the object improving video playback toggle speed.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of an embodiment of MP4 document play-back method of the present invention.
Fig. 2 is the flow chart of an embodiment of MP4 document handling method of the present invention.
Fig. 3 is the schematic diagram of an embodiment of MP4 file playing system of the present invention.
Fig. 4 is the schematic diagram of another embodiment of MP4 file playing system of the present invention.
Fig. 5 is the order program service flow chart of MP4 file playing system of the present invention.
Fig. 6 is that server of the present invention obtains fragment request process chart.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.
The flow chart of an embodiment of a kind of MP4 document play-back method of the present invention as shown in Figure 1.
In a step 101, obtain the index file head of MP4 file from server, obtain the slicing files head index in index file head.
In a step 102, slicing files head is obtained according to slicing files head index.
In step 103, obtain according to the slicing files head obtained and play burst.
Multiple slicing files head and burst can be obtained by repeating step 102 and 103, thus play whole MP4 file.Due to the file header size of MP4 file and the length positive correlation of file, therefore, after MP4 file fragmentation, be each burst spanned file head respectively, the size of slicing files head is less than the file header of former MP4 file.By such mode, can play by the corresponding burst namely started obtaining after obtaining slicing files head, accelerating the toggle speed that MP4 file is play.
The slicing files head index stored in the index file head obtained in step 101 can be the allocation index of slicing files head.From index file head, obtain the address of required slicing files head, thus obtain corresponding slicing files head, logic is simple, and server is swift in response.
Slicing files head index can also be the path indexing of slicing files leading address.The routing information depositing slicing files leading address can be obtained from index file head, thus obtain the address of depositing slicing files head, then obtain slicing files head.Due to slicing files head address information shared by space relative to fixing slicing files head, what the mode of calculating can be adopted to obtain different slicing files leading address deposits path, therefore this mode can effectively reduce the size of index file head, reduces the stand-by period before the broadcasting of MP4 file.
In one embodiment, MP4 document play-back method can also increase the process with user interactive.Send fragment request to server, fragment request comprises corresponding burst and user drags positional information.
After acquisition index file head, when there is drag operation, owing to further comprises the time range information of each burst in index file head, according to the time range information dragging position and each burst, determine to drag the burst residing for position, then send fragment request to server.Obtain corresponding slicing files head and burst by such mode and play.Make the reaction that can realize in such a way user's drag operation, realize the function with user interactions.If through calculating, the position of dragging is the original position of certain burst just, the information dragging position in fragment request, can not be comprised, also can obtain the content dragging position and start.
The flow chart of an embodiment of MP4 document handling method of the present invention as shown in Figure 2.
In step 201, server end sends index file head to client, has the slicing files head index of MP4 file fragmentation in index file head.
In step 202., server end sends slicing files head to client.
In step 203, server end sends the burst corresponding with slicing files head so that client plays corresponding burst according to slicing files head to client.
By such mode, the length needing the file header sent when video starts can be reduced, reduce the transmitting time of file header, accelerate the toggle speed that MP4 file is play.
The slicing files head index information stored in the index file head sent in step 201 can be the allocation index of slicing files head, the address of required slicing files head can be obtained from index file head, thus obtaining corresponding slicing files head, logic is simple, and server is swift in response.
Slicing files head index can also be the path indexing of slicing files leading address, can obtain the routing information depositing slicing files leading address from index file head, thus obtains the address of depositing slicing files head, then obtains slicing files head.Due to slicing files head address information shared by space relative to fixing slicing files head, what the mode of calculating can be adopted to obtain different slicing files leading address deposits path, therefore the path indexing of storing documents leading address can be effectively reduced the size of index file head as slicing files head index, accelerate the toggle speed of MP4 file better.
The burst of MP4 file can be logic burst, slicing files head and corresponding burst Separate Storage.In the mode of logic burst, do not need itself to make change to MP4 file, when burst again, only need to form new file header, process is simple.The burst of MP4 file can also with corresponding burst Coutinuous store, slicing files head is positioned at the front end of corresponding burst, and such sliced fashion ensures slicing files head and corresponding burst Coutinuous store, more reliable in document transmission process.
In one embodiment, MP4 document handling method can also increase the function sending the video that relevant position starts according to the dragging request of client.After sending index file head to client, when receiving fragment request, judge whether comprise dragging positional information in fragment request.If do not comprise dragging positional information, then according to the burst information of request, send corresponding slicing files head, send corresponding burst according to slicing files hair; If comprise dragging positional information, then calculate and drag the memory address of position in residing burst, then to new file header should be formed by the media file that starts of memory address, send this slicing files head and corresponding burst, thus realize sending file from dragging position.
The schematic diagram of an embodiment of MP4 file playing system of the present invention as shown in Figure 3.In this embodiment, 31 represent MP4 file playing device, and 32 represent MP4 document handling apparatus.Index sending module 301 sends index file head to index receiver module 304, slicing files head sending module 302 sends slicing files head to slicing files head receiver module 305, slicing files head sending module 302 is according to slicing files header determination burst, and sending burst to fragment receiver module 306 by burst sending module 303, the slicing files head received and burst are sent to playing module 307 and play by slicing files head receiver module 305 and fragment receiver module 306 respectively.By the transmission of multiple slicing files head and slicing files, realize the broadcasting of whole MP4 video.Such device can realize when video starts, and MP4 document handling apparatus sends slicing files head and corresponding burst, and namely MP4 file playing device can play corresponding burst after receiving slicing files head, accelerate the toggle speed of video.
The schematic diagram of another embodiment of MP4 file playing system of the present invention as shown in Figure 4.41 is MP4 file playing device, and 42 is MP4 document handling apparatus.The index file hair obtained from index sending module 401 is delivered to interactive module 406 by index receiver module 405, and interactive module 406 calculates according to the situation of dragging and index file head the burst dragged residing for position, transmit a request to judge module 402.Judge module 402 judges whether contain locating information in request, if do not had, then the file header index information received is sent to slicing files head sending module 404; If had, then in update module 403, generate new file header according to locating information.Slicing files head receiver module 305 is sent to by slicing files head sending module 404.Burst sending module 303 sends burst corresponding to slicing files head to fragment receiver module 306, and playing module 307 plays MP4 file according to the slicing files head received from slicing files head receiver module 305 and fragment receiver module 306 and corresponding burst.By such device, what achieve between MP4 file playing system and user is mutual, and the video that system can be switched to correspondence position fast according to the dragging of user is play.
In one embodiment, index file head can be the file of Json form, can comprise with the keyword in following table 1 in index file head:
Table 1
The address of slicing files head can be obtained according to the URL information in index file head.Slicing files head can with MP4 file fragmentation Separate Storage, the slicing files head of same MP4 file can be stored together.In one embodiment, the slicing files head of same MP4 file forms with a structure and all slicing files head Coutinuous stores, and the definition being wherein stored in the structure before slicing files head can be as follows:
The number m_dwClipCount of burst is defined in structure MP4ClipHeader, and the MP4ClipInfo structure equal with burst number.The slicing files head of the corresponding burst of each MP4ClipInfo structure and burst content information, wherein, m_dwHeaderStartPos is the original position of slice header in header file, m_dwHeaderLength is the length of slice header, m_llContentStartPos is the original position of burst content in original document, and m_dwContentLength is the length of burst content.
The address information of MP4ClipHeader structure is comprised in slicing files head index in index file head, shared by each MP4ClipInfo, space is identical, the calculating formula of the space that therefore can take with MP4ClipInfo × (burst sequence number-1)+4 obtains the MP4ClipInfo address of corresponding burst, thus obtain the address of corresponding slicing files head, determine the address of slicing files.
In this embodiment, slicing files head index content is simple, only needs space and burst sequence number shared by the address information of MP4ClipHeader structure, each MP4ClipInfo can calculate the store path of slicing files leading address.This mode can effectively reduce index file head, and brief client obtains the time of index file head from server.
In one embodiment, order program service flow process as shown in Figure 5,
In step 501, client obtains the location URL of MP4 file from door, initiates video request program, sends request to route.
In step 502, the footpath, index file parting of the virtual burst of routing inquiry MP4, and return index file head routing information to client.
In step 503, client sends the request of index file head according to the index file head routing information received to server.
In step 504, server receives the request of index file head, detects that the index file header file of request exists, then reads index file head.
In step 505, server sends index file head to client.
In step 506, client reception hint file header is also resolved, and reads the path of MP4 slicing files.Here the path of slicing files can be relative path, uses the request path of index file head to construct the request path of slicing files.
In step 507, server is resolved after receiving request and is obtained fragment request, finds containing inquiry string in request, as " clipseq " in Json file url keyword in embodiment, and the file of request is MP4 form, then the content of decision request is the virtual burst of MP4.Server reads the file header of this burst according to the burst sequence number that " clipseq " specifies from slicing files head, from MP4 original document, then read corresponding media content.
In step 508, server sends slicing files head to client.
In step 509, server sends MP4 file fragmentation to client, and client starts after receiving the content of request burst to play;
In step 510, after this burst content reception is complete, next burst is asked.
In this embodiment, from client acquisition programme carries out program request, through the address of route determination index file head, client and server are mutual gradually, achieve MP4 file and carry out transmitting and playing in the mode of burst.Server just returns slicing files head and the burst of corresponding burst after receiving the fragment request of client, ensures that server can stop sending timely when client user disconnects, and saves server end resource.
In one embodiment, the handling process that server receives after acquisition fragment request message can be as shown in Figure 6.In step 601, server receives the acquisition fragment request of client.
In step 602, server judges whether there is " .mp4 " keyword in request, if not containing " .mp4 " keyword, then perform step 603, this request is not MP4 fragment request; Otherwise perform step 604.
In step 604, whether server judges, containing inquiry string in request, if not containing inquiry string, then to perform step 603, judge that this request is not MP4 fragment request; Otherwise perform step 605.
In step 605, server parses request, obtains the burst sequence number of request.
In step 606, the deposit position of the address information of the slicing files head of server computation requests.
In step 607, server reads the address information that slicing files head stores.
In step 608, server reads the content of slicing files head according to the address of slicing files head.
Through above step, server read slicing files header according to the acquisition fragment request received.
In step 609, whether server judges to obtain in fragment request containing locating information.Locating information is that user drags burst, and drags point not in the mark of the original position of burst, if containing locating information, then carry out step 610; If not containing locating information, then carry out step 612.Locating information can be drag position to be positioned at which time point, also can be the relative position dragging burst address residing for the media content of position and this dragging position.
In step 610, server reads the information of former slicing files head and burst, constructs new slicing files head according to locating information.
In step 611, server, according to locating information, calculates the initial address of new burst, constructs new burst.Be logic burst at the burst of MP4 file, when slicing files head stores separately, the media content of the initial address+dragging position of the initial address=former burst of new burst is in the relative address of residing burst; At burst and the corresponding slicing files head Coutinuous store of MP4 file, and slicing files head be stored in corresponding burst before when, the media content of the initial address+dragging position of the initial address=former burst of new burst is long at the slicing files head of the relative address-former burst of residing burst.
In step 612, server reads burst corresponding to slicing files head.For the situation having locating information in request, what server read is the new burst constructed according to locating information.
In step 613, the burst of slicing files head and correspondence is sent to client by server
By above step, whether server successively have passed through after the requests have been received is whether mp4 asks, is slicing files request, whether has locating information three deterministic processes, can be comparatively rigorous choosing is deleted to the request received, Deterministic service device work stable.Step 609,610,611 completes the server process in user's dragging situation, can ensure the realization of video playback drag function.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (19)
1. a MP4 document play-back method, is characterized in that, comprising:
Obtain the index file head of MP4 file from server, wherein, described MP4 file is split as multiple burst, and described index file head comprises the slicing files head index of each burst;
Slicing files head is obtained according to described slicing files head index;
Obtain according to described slicing files head and play burst.
2. method according to claim 1, is characterized in that, described slicing files head index is the allocation index of slicing files head or the path indexing of storage slicing files leading address.
3. method according to claim 1, is characterized in that, described index file head also comprises the time range of each burst;
Described method also comprises:
The drag operation of response user, determines according to slicing files head index the burst dragging place, position;
Send to server and obtain fragment request, described acquisition fragment request comprises the request that corresponding burst and user drag positional information.
4. a MP4 document handling method, is characterized in that, comprising:
Send the index file head of MP4 file to client, wherein, described MP4 file is cut into multiple burst, and described index file head comprises the slicing files head index of each burst;
Slicing files head is sent to client;
The burst corresponding with described slicing files head is sent so that described client plays described corresponding burst according to described slicing files head to client.
5. method according to claim 4, is characterized in that, described slicing files head index is the allocation index of slicing files head or the path indexing of storage slicing files leading address.
6. method according to claim 4, is characterized in that, the burst of described MP4 file is logic burst, described slicing files head and corresponding burst Separate Storage.
7. method according to claim 4, is characterized in that, slicing files head and the corresponding burst Coutinuous store of described MP4 file, and described slicing files head is positioned at the front end of described corresponding burst.
8. method according to claim 6, it is characterized in that, judge the locating information whether comprising response user dragging in described fragment request, if comprise locating information, then according to the initial address of described locating information determination corresponding content in described burst, generate new slicing files head.
9. method according to claim 7, is characterized in that, judges the locating information whether comprising response user dragging in fragment request, if comprise locating information, then according to described locating information again burst, and generates new slicing files head.
10. a MP4 file playing device, is characterized in that, comprising:
Index receiver module, for reception hint file header, wherein, described MP4 file is cut into multiple burst, and described index file head comprises the slicing files head index of each burst;
Slicing files head receiver module, for receiving slicing files head;
Fragment receiver module, for receiving burst corresponding to described slicing files head;
Playing module, for playing described burst according to described slicing files head.
11. devices according to claim 10, is characterized in that, described slicing files head index is the allocation index of slicing files head or the path indexing of storage slicing files leading address.
12. devices according to claim 10, is characterized in that, comprise interactive module, for responding the drag operation of user, determine to drag the burst that is positioned at of position according to slicing files head index, send and comprise the request that corresponding burst and user drag positional information.
13. 1 kinds of MP4 document handling apparatuss, is characterized in that, comprising:
Index sending module, for sending index file head, wherein said MP4 file is cut into multiple burst, and described index file head comprises the slicing files head index of each burst;
Slicing files head sending module, for sending slicing files head;
Burst sending module, for sending the burst corresponding with described slicing files head.
14. devices according to claim 13, is characterized in that, described slicing files head index is the allocation index of slicing files head or the path indexing of storage slicing files leading address.
15. devices according to claim 13, is characterized in that, the burst of described MP4 file is logic burst, described slicing files head and corresponding burst Separate Storage.
16. devices according to claim 13, is characterized in that, slicing files head and the corresponding burst Coutinuous store of described MP4 file, and described slicing files head is positioned at the front end of described corresponding burst.
17. devices according to claim 15, is characterized in that, comprising:
Request judge module, for judging the locating information whether comprising response user dragging in fragment request;
Update module, for according to the initial address of described locating information determination corresponding content in described burst, generates new slicing files head.
18. devices according to claim 16, is characterized in that, comprising:
Request judge module, for judging the locating information whether comprising response user dragging in fragment request;
Update module, for according to described locating information again burst, and generates new slicing files head.
19. 1 kinds of MP4 file playing systems, is characterized in that, comprise the arbitrary described MP4 file playing device of claim 10 ~ 12 and the arbitrary described MP4 document handling apparatus of claim 13 ~ 18.
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