CN102004760B - Multimedia file storing and applying method, related device and system - Google Patents
Multimedia file storing and applying method, related device and system Download PDFInfo
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Abstract
The embodiment of the invention discloses a multimedia file storing and playing method as well as a related device and a system. The multimedia file storing method comprises the following steps: dividing a first hard disk group and a second hard disk group; cutting a multimedia file to be stored into multiple segment files with equal size according to the size of a pre-set segment file; uniformly storing the segment files in the hard disks of the second hard disk group; establishing an index file and storing the index file in the first hard disk group; and establishing a segment record file and storing the segment record file in the first hard disk group so that a multimedia server acquires the content of a corresponding segment file according to the index file and the segment record file when a play request of a multimedia client is received. Through the scheme of the invention, the response speed of the multimedia server to a multimedia broadcasting client is effectively improved, load balance of each hard disk in single multimedia server is realized, and the network bandwidth is saved at the same time.
Description
Technical field
The present invention relates to multimedia technology field, relate in particular to storage and player method, relevant apparatus and the system of multimedia file.
Background technology
Along with network technology, computer technology and Development of Multimedia Technology, the multimedia-on-demand The Application of Technology also more and more widely.The user can carry out multimedia-on-demand by the multimedia-on-demand client, multimedia server is after receiving user's playing request, read the data (as data such as video, audio frequency) that comprise in the corresponding multimedia file, and send this multimedia-on-demand client to by network.In multimedia-on-demand was used, the storage means of multimedia file was one of gordian technique that relates in the multimedia order programme system.
A kind of storage means of multimedia file is that multimedia file is carried out deblocking by the mode that configures, afterwards data block is stored in a plurality of buffer servers of setting respectively, and in each buffer server, generate the index information of corresponding data block store, when the client-access multimedia file, then can revert to original multimedia file according to index information reading corresponding data block and recombinating in corresponding a plurality of buffer servers.
Though said method can be saved the storage space of multimedia server, but because being form with data block, multimedia file is stored on the different buffer servers, when multimedia server receives the request of visit multimedia file of multimedia-on-demand client, just must from a plurality of buffer servers, obtain the data block of this multimedia file correspondence earlier by network, this must influence the reading speed of multimedia server to multimedia file, thereby has influenced the response speed of multimedia server to the multimedia-on-demand client.On the other hand, usually there are a plurality of hard disks in the separate unit buffer server, said method only with data block store in different buffer servers, do not consider the problem of load balancing of a plurality of hard disks in the single buffer server, thereby may cause certain the hard disk load in the single buffer server overweight.
Summary of the invention
The embodiment of the invention provides a kind of storage and player method, relevant apparatus and system of multimedia file, be used for improving multimedia server to the response speed of multimedia-on-demand client, realize the load balancing of each hard disk in the single multimedia server, save the network bandwidth simultaneously.
For solving the problems of the technologies described above, the embodiment of the invention provides following technical scheme:
A kind of storage means of multimedia file comprises:
Divide the first hard disk group and the second hard disk group;
According to the size of the segmental file that presets, multimedia file to be stored is cut into equal-sized a plurality of segmental file;
Above-mentioned segmental file is stored into equably in each hard disk of the above-mentioned second hard disk group;
Set up index file, above-mentioned index file is stored in the above-mentioned first hard disk group; Described index file comprises: the filename of described multimedia file, the number of the key frame of described multimedia file and key frame information; Described key frame information comprises: positional information and described key frame the reproduction time in described multimedia file of described key frame in described multimedia file;
Set up the segmentation log file, above-mentioned segmentation log file is stored in the above-mentioned first hard disk group, so that multimedia server is when receiving the playing request of multimedia client, get access to the content of corresponding segmental file according to above-mentioned index file and above-mentioned segmentation log file.
A kind of player method of multimedia file comprises:
Receive the playing request of multimedia-on-demand client;
Obtain the filename of multimedia file and the start time point of broadcast thereof according to above-mentioned playing request;
Whether index file and the segmentation log file of judging above-mentioned multimedia file all exist;
If do not exist, then finish playing flow;
If exist, judge then whether above-mentioned start time point is reasonable;
If unreasonable, then finish playing flow;
If rationally, then judge whether to receive F.F. or fast reverse play request,
If, then carry out F.F. or fast reverse play,
If not, then carrying out normal speed plays;
Wherein, above-mentioned F.F. or fast reverse play flow process comprise:
A1. according to the pre-time point of playing, above-mentioned index file and above-mentioned segmentation log file read the content of corresponding segmental file, and will send to above-mentioned multimedia-on-demand client with the content of the immediate key frame of time point of above-mentioned pre-broadcast;
A2. judge whether above-mentioned segmental file is last segmental file of above-mentioned multimedia file;
If then finish playing flow;
If not, then according to the speed of above-mentioned F.F. or the F.F. of fast reverse play acquisition request or rewind down, calculate next time point, repeating step A1;
Above-mentioned normal speed playing flow comprises:
B1. according to the pre-time point of playing, above-mentioned index file and above-mentioned segmentation log file read the content of corresponding segmental file, and will be from the time point of above-mentioned pre-broadcast, extremely the content of last byte sends to above-mentioned multimedia-on-demand client in the above-mentioned segmental file;
B2. judge whether above-mentioned segmental file is last segmental file of above-mentioned multimedia file;
If then finish playing flow;
If not, then read the content of next segmental file according to above-mentioned segmentation log file, send it to above-mentioned multimedia-on-demand client, repeating step B2;
Described index file comprises: the filename of described multimedia file, the number of the key frame of described multimedia file and key frame information;
Described segmentation log file comprises:
The filename of described multimedia file, the size of each segmental file and filename, the complete storing path of each segmental file;
Wherein, described key frame information comprises:
The positional information of described key frame in described multimedia file, the byte number that described key frame comprises, and the reproduction time of described key frame in described multimedia file;
Described step B1 comprises:
B1. according to described index file, obtain and the positional information of the immediate key frame of the time point of pre-broadcast in described multimedia file;
B2. go out the filename of segmental file at the time point place of pre-broadcast according to described positional information calculation, according to the filename of segmental file, in described segmentation log file, extract the complete storing path of corresponding segmental file;
B3. read the content of described segmental file according to described complete storing path, and will be from the time point of described pre-broadcast, extremely the content of last byte sends to described multimedia-on-demand client in the described segmental file;
Described step B2 is specially:
B4. judge whether described segmental file is last segmental file of described multimedia file;
If then finish playing flow;
If not, then extract the complete storing path of next segmental file according to described segmentation log file, and read the content of described next segmental file according to described complete storing path, send it to described multimedia-on-demand client, repeating step b4.
A kind of memory storage of multimedia file comprises:
The first hard disk group is used for storage index file and segmentation log file;
The second hard disk group is used for the multimedia segmental file of storage;
Cutter unit is used for the size according to the segmental file that presets, and multimedia file to be stored is cut into equal-sized a plurality of segmental file;
The segmental file storage unit is for each hard disk that the segmental file after the above-mentioned cutter unit cutting is stored equably into the above-mentioned second hard disk group;
First sets up storage unit, is used for setting up index file, and above-mentioned index file is stored in the above-mentioned first hard disk group; Described index file comprises: the filename of described multimedia file, the number of the key frame of described multimedia file and key frame information; Described key frame information comprises: positional information and described key frame the reproduction time in described multimedia file of described key frame in described multimedia file;
Second sets up storage unit, is used for setting up the segmentation log file, and above-mentioned segmentation log file is stored in the above-mentioned first hard disk group.
A kind of multimedia play system comprises:
Receiving element is for the playing request that receives the multimedia-on-demand client;
First acquiring unit is used for obtaining the filename of multimedia file and the start time point of broadcast thereof according to the playing request that above-mentioned receiving element receives;
First judging unit is used for judging whether the index file of above-mentioned multimedia file and segmentation log file all exist, if exist, then triggers second judging unit, if do not exist, then triggers end unit;
Second judging unit is used for judging whether above-mentioned start time point is reasonable, if rationally, then trigger the 3rd judging unit, if unreasonable, then triggers end unit;
The 3rd judging unit is used for judging whether to receive F.F. or fast reverse play request, if, then trigger first broadcast unit, if not, then trigger second broadcast unit;
End unit is used for finishing playing flow;
Wherein, above-mentioned first broadcast unit comprises:
First reads transmitting element, be used for the time point according to pre-broadcast, above-mentioned index file and above-mentioned segmentation log file read the content of corresponding segmental file, and will send to above-mentioned multimedia-on-demand client with the content of the immediate key frame of time point of above-mentioned pre-broadcast;
The first file judging unit is used for judging whether the current segmental file that reads is last segmental file of above-mentioned multimedia file, if, then trigger above-mentioned end unit, if not, then trigger first computing unit;
First computing unit is used for the speed according to above-mentioned F.F. or the F.F. of fast reverse play acquisition request or rewind down, calculates next time point, and triggers above-mentioned first and read transmitting element;
Above-mentioned second broadcast unit comprises:
Second reads transmitting element, be used for the time point according to pre-broadcast, above-mentioned index file and above-mentioned segmentation log file read the content of corresponding segmental file, and will be from the time point of above-mentioned pre-broadcast, extremely the content of last byte sends to above-mentioned multimedia-on-demand client in the above-mentioned segmental file;
The second file judging unit is used for judging whether the current segmental file that reads is last segmental file of above-mentioned multimedia file, if, then trigger above-mentioned end unit, if not, then trigger third reading and get transmitting element;
Third reading is got transmitting element, is used for reading according to above-mentioned segmentation log file the content of next segmental file, sends it to above-mentioned multimedia-on-demand client, and triggers the above-mentioned second file judging unit;
Described index file comprises: the filename of described multimedia file, the number of the key frame of described multimedia file and key frame information;
Described segmentation log file comprises:
The filename of described multimedia file, the size of each segmental file and filename, the complete storing path of each segmental file;
Wherein, described key frame information comprises:
The positional information of described key frame in described multimedia file, the byte number that described key frame comprises, and the reproduction time of described key frame in described multimedia file;
Described second reads transmitting element comprises:
Second acquisition unit is used for according to described index file, obtains and the positional information of the immediate key frame of the time point of pre-broadcast in described multimedia file;
Second extraction unit is used for going out according to described positional information calculation the filename of segmental file at the time point place of pre-broadcast, according to the filename of segmental file, extracts the complete storing path of corresponding segmental file in described segmentation log file;
Second reads the transmission subelement, is used for reading according to described complete storing path the content of described segmental file, and will be from the time point of described pre-broadcast, and extremely the content of last byte sends to described multimedia-on-demand client in the described segmental file;
The 3rd extraction unit is for the complete storing path that extracts next segmental file according to described segmentation log file;
Described third reading is got transmitting element and specifically is used for: the complete storing path that extracts according to described the 3rd extraction unit reads the content of described next segmental file, sends it to described multimedia-on-demand client, and triggers the described second file judging unit.
Therefore, in the embodiment of the invention, multimedia file is cut into the impartial a plurality of segmental files of size, and be stored in equably on a plurality of hard disks of multimedia server, on the one hand, realized the load balancing of each hard disk in the single multimedia server, on the other hand, multimedia server is when receiving the playing request of multimedia-on-demand client, can directly read the segmental file of corresponding multimedia file from hard disk, improved the response speed of multimedia server to the multimedia-on-demand client, simultaneously, index file and segmentation log file by first hard-disc storage, the content that will play can be located and extract to multimedia server more exactly, and the whole multimedia file need not be sent to the multimedia-on-demand client, reduce the delivery flow rate of unnecessary content of multimedia on network, thereby saved the network bandwidth.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is embodiment schematic flow sheet of storage means of multimedia file in the embodiment of the invention;
Fig. 1 (a) is the structural representation of index file in the embodiment of the invention;
Fig. 1 (b) is the structural representation of segmentation log file in the embodiment of the invention;
Fig. 2 is embodiment schematic flow sheet of player method of multimedia file in the embodiment of the invention;
Fig. 3 is another embodiment schematic flow sheet of player method of multimedia file in the embodiment of the invention;
Fig. 4 is another embodiment schematic flow sheet of player method of multimedia file in the embodiment of the invention;
Fig. 5 is the structural representation of the memory storage of multimedia file in the embodiment of the invention;
Fig. 6 is the structural representation of the Play System of multimedia file in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of storage and access method, relevant apparatus and system of multimedia file.
For make goal of the invention of the present invention, feature, advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, but not whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Because the present defective of multimedia file memory technology, make that hard disk I/O (I/O, bottleneck problem Input/Output) appear in multimedia server easily when a plurality of multimedia-on-demand client central access multimedia server.The inventor finds in research process, the concrete reason that the problems referred to above occur is, because multimedia file is that unit is stored under certain catalogue of multimedia server with a whole file, be that physical distribution is at a hard disk or a raid-array (RAID, Redundant Array of Independent Disk), when the multimedia file of user visit mostly is to be stored in this catalogue following time, just caused the I/O bottleneck of above-mentioned catalogue place hard disk or RAID, therefore, the inventor expects, if each multimedia file is distributed among a plurality of hard disks or the RAID in the mode of segmentation, so no matter the user disperses visit or central access, the visit of each hard disk of multimedia server can both obtain good equilibrium, and, owing to be the content that from hard disk, directly reads multimedia file, do not need to read from other buffer server by network, so reading speed is faster.
Storage means to a kind of multimedia file in the embodiment of the invention is described below, sees also Fig. 1, and an embodiment comprises in the embodiment of the invention:
101, divide the first hard disk group and the second hard disk group;
Multimedia server is when storing multimedia, at first can divide hard disk and use planning, for example, a multimedia server comprises a hard disk group usually, supposing has N(N in this hard disk groups〉2) hard disk of piece same model, then the 1st hard disk can be belonged to the first hard disk group, to be used for storage index file and segmentation log file, all the other N-1 piece hard disks can be belonged to the second hard disk group, to be used for the multimedia segmental file of storage.
102, according to the size of the segmental file that presets, multimedia file to be stored is cut into equal-sized a plurality of segmental file;
For example, if a multimedia file size is 200,000,000, the size of the segmental file that multimedia server presets is 2,000,000, and then according to the size of the segmental file that presets, this multimedia file can be split into 200/2 segmental file, i.e. 100 segmental files.
103, segmental file is stored into equably in each hard disk of the second hard disk group;
For example, if in the second hard disk group 4 hard disks are arranged, the name of each hard disk is called A, B, C and D, then the 1st segmental file can be stored in hard disk A, the 2nd segmental file is stored in hard disk B, the 3rd segmental file is stored in disk C, the 4th segmental file is stored in hard disk D, the 5th segmental file is stored in hard disk A etc., by that analogy.
Can name each segmental file, for example, if the file of multimedia file is by name: mythical .ts, then the name form of segmental file can be: mythology _ divided_i.ts, wherein, i represents it is the i segmental file.
104, set up index file, index file is stored in the first hard disk group;
Set up index file according to former multimedia file, to preserve the information of this multimedia file, for example can comprise the filename of this multimedia file, number and the key frame information of key frame (as the I frame) that this multimedia file comprises, version of code stream, video format, audio format and this index file in the time of can also comprising the briefly introducing of this multimedia file, sampling rate, broadcast etc.
Wherein, key frame information can comprise the positional information of key frame in above-mentioned multimedia file and its reproduction time in above-mentioned multimedia file, can also comprise byte number that key frame comprises etc.
The file extension of above-mentioned index file can be top, and its name form can be the filename add file extension name of this multimedia file, as being " mythical .top ".
Its structure can be shown in Fig. 1 (a), the D1 district is used for the version of this index file of record, the D2 district be used for this multimedia file of record filename, briefly introduce, the number of sampling rate, code stream, video format, audio format and key frame etc., D3～Dn district is used for the information (as the positional information of this key frame at video, reproduction time and the byte number that comprises etc.) of this each key frame of multimedia file of record.
105, set up the segmentation log file, the segmentation log file is stored in the first hard disk group;
Each segmental file after being cut according to former multimedia file, set up the segmentation log file, to record the information of each segmental file, and the segmentation log file stored in the first hard disk group, so that multimedia server is when receiving the playing request of multimedia client, get access to the content of corresponding segmental file according to the index file of storing in the first hard disk group and segmentation log file.
Wherein, the segmentation log file can comprise the filename of this multimedia file, size and the filename of its each segmental file, and the complete storing path of each segmental file can also comprise the piece number etc. of the hard disk of memory segment file.
The file extension of above-mentioned segmentation log file can be div, and its name form can be the filename add file extension name of this multimedia file, as being " mythical .div ".
Its structure can be shown in Fig. 1 (b), the filename of F1 district this multimedia file of record, the size of each segmental file etc., F2～Fn records the complete storing path of each segmental file, and its form for example can be: " filename of the title/catalogue of/the n piece hard disk/n piece segmental file ".
Therefore, in the embodiment of the invention, multimedia file is cut into the impartial a plurality of segmental files of size, and be stored in equably on a plurality of hard disks of multimedia server, on the one hand, realized the load balancing of each hard disk in the single multimedia server, on the other hand, multimedia server is when receiving the playing request of multimedia-on-demand client, can directly read the segmental file of corresponding multimedia file from hard disk, improved the response speed of multimedia server to the multimedia-on-demand client, simultaneously, index file and segmentation log file by first hard-disc storage, the content that will play can be located and extract to multimedia server more exactly, and the whole multimedia file need not be sent to the multimedia-on-demand client, reduce the delivery flow rate of unnecessary content of multimedia on network, thereby saved the network bandwidth.
Below the many matchmakers document play-back method based on above-mentioned multimedia file storage means is described, sees also Fig. 2, embodiment of player method of multimedia file comprises in the embodiment of the invention:
201, multimedia server receives the playing request of multimedia-on-demand client;
The user can play by multimedia-on-demand client free online multimedium file, when the user wants to play certain multimedia file, can send the playing request of this multimedia file by the multimedia-on-demand client to multimedia server, in actual applications, the user also can specify the start time point of playing in playing request, if the user does not specify, then the start time point of acquiescence broadcast is 0, and its presentation format can be 00:00:00.
202, multimedia server obtains the filename of multimedia file and the start time point of broadcast thereof according to the playing request that receives;
After multimedia server receives playing request, can from this playing request, get access to the filename of multimedia file of pre-broadcast and the start time point of broadcast thereof.
For example, the user is by multimedia-on-demand client movies on demand mythology, and give directions after the 10th minute and play, then multimedia server is after receiving this playing request, can from this playing request, get access to the filename " mythical .ts " of this multimedia file, and the start time point of playing " 00:10:00 ".
203, multimedia server judges whether the index file of above-mentioned multimedia file and segmentation log file all exist;
Multimedia server is after obtaining the filename of above-mentioned multimedia file, can whether index file and the segmentation log file that can judge above-mentioned multimedia file exist, namely judge and find the index file corresponding with above-mentioned multimedia file and segmentation log file in the first hard disk group.If all exist, then execution in step 204, if do not exist, then execution in step 208.
204, judging whether the start time point get access to is reasonable, is execution in step 205 then;
Multimedia server judges whether the start time point that gets access to is reasonable, namely, judge whether start time point has exceeded the duration of above-mentioned multimedia file, for example, the playing duration of a multimedia file is 30 minutes, if the start time point of appointment is the 32nd minute, then can be judged as irrational start time point.
If the start time point judged result that gets access to is for rationally, then execution in step 205, if unreasonable, then execution in step 208.
205, judge whether to receive F.F. or fast reverse play request;
In the playing process of multimedia file, the user can select to play this multimedia file by the mode of F.F. or rewind down by the multimedia-on-demand client, play when the user selects F.F. or rewind down, then the multimedia-on-demand client sends F.F. or fast rewinding request to multimedia server.
If multimedia server receives F.F. or fast reverse play request, then execution in step 206, if do not receive F.F. or fast reverse play request, then execution in step 207.
206, carry out F.F. or fast reverse play;
But F.F. or fast reverse play flow process following steps:
S1. multimedia server is according to the pre-time point of playing, the index file of above-mentioned multimedia file correspondence and segmentation log file read the content of corresponding segmental file, and will send to above-mentioned multimedia-on-demand client with the content of this pre-immediate key frame of playing of time point;
In the index file of above-mentioned multimedia file correspondence, recording the information of each key frame of this multimedia file (as the I frame) (as the reproduction time of this key frame in this multimedia file, positional information in this multimedia file etc.), therefore, can be according to from above-mentioned index file, getting access to and the positional information of the immediate key frame of the time point of pre-broadcast in this multimedia file, and multimedia file is to be divided into the impartial segmental file of size according to the size that presets, therefore can calculate the filename of segmental file at the time point place of pre-broadcast by above-mentioned positional information.
In the segmental file record of above-mentioned multimedia file correspondence, recording size and the filename of each segmental file of above-mentioned multimedia file, and the information such as complete storing path of each segmental file, therefore, after knowing the filename of segmental file, multimedia server just can be according to the complete storing path of above-mentioned segmentation log file record, find corresponding segmental file also the content of this segmental file to be read out, will send to above-mentioned multimedia-on-demand client with the content of this pre-immediate key frame of playing of time point.
S2. judge whether the current segmental file that reads is last segmental file of above-mentioned multimedia file;
If then execution in step 208;
If not, then according to the F.F. that receives or the speed of the F.F. of fast reverse play acquisition request or rewind down, calculate next time point, repeating step S1.
207, carrying out normal speed plays;
But normal speed playing flow following steps:
X1. multimedia server is according to the pre-time point of playing, the index file of above-mentioned multimedia file correspondence and segmentation log file read the content of corresponding segmental file, and will be from this pre-time point of playing, the multimedia-on-demand client that the content request of sending to of last byte is play in the extremely corresponding segmental file;
The mode of obtaining and read the corresponding segment file can repeat no more as the description among the step S1 herein.
X2. judge whether the current segmental file that reads is last segmental file of above-mentioned multimedia file;
If then execution in step 208;
If not, then read the content of next segmental file according to the segmentation log file of above-mentioned multimedia file correspondence, send it to above-mentioned multimedia-on-demand client, repeating step X2.
The mode of obtaining and read the corresponding segment file can repeat no more as the description among the step S1 herein.
208, finish playing flow.
Will be understood that, when being divided into two parts, a key frame has been stored in the different segmental files, namely the start time of this key frame point and concluding time put when laying respectively in the different segmental files, this key frame still can intactly be read, for example, when multimedia server reads certain segmental file, back a part of content of last key frame of this segmental file is divided to be stored in the next segmental file, then multimedia server still can be from next segmental file reads out back a part of content of this key frame, guarantees that the content of last key frame of this segmental file of reading is complete.
Therefore, in the embodiment of the invention, multimedia file is cut into the impartial a plurality of segmental files of size, and be stored in equably on a plurality of hard disks of multimedia server, on the one hand, realized the load balancing of each hard disk in the single multimedia server, on the other hand, multimedia server is when receiving the playing request of multimedia-on-demand client, can directly read the segmental file of corresponding multimedia file from hard disk, improved the response speed of multimedia server to the multimedia-on-demand client, simultaneously, index file and segmentation log file by first hard-disc storage, the content that will play can be located and extract to multimedia server more exactly, and the whole multimedia file need not be sent to the multimedia-on-demand client, reduce the delivery flow rate of unnecessary content of multimedia on network, thereby saved the network bandwidth.
For ease of understanding, playing under the mode of quick or F.F. with multimedia file below is example, is described in detail with an application scenarios, can consult Fig. 3, and another embodiment of the multi-medium play method that the embodiment of the invention provides comprises:
Step 301～303 are similar with step 201～203 shown in Figure 2, repeat no more herein.
304, judging whether the start time point get access to is reasonable, is execution in step 305 then;
Multimedia server judges whether the start time point that gets access to is reasonable, namely, judge whether start time point has exceeded the duration of above-mentioned multimedia file, for example, the playing duration of a multimedia file is 30 minutes, if the start time point of appointment is the 32nd minute, then can be judged as irrational start time point.
305, multimedia server obtains and the positional information of the immediate key frame of the time point of pre-broadcast in multimedia file according to index file;
In the index file of above-mentioned multimedia file correspondence, recording the information (as the reproduction time of this key frame in this multimedia file, the positional information in this multimedia file etc.) of each key frame of this multimedia file (as the I frame), multimedia server is according to the key frame information of index file storage, can find and the immediate key frame of the time point of pre-broadcast, thereby can get access to the positional information of above-mentioned key frame in multimedia file.
306, multimedia server extracts the complete storing path of corresponding segmental file according to the positional information and the segmentation log file that get access to;
Multimedia file is to be divided into the impartial segmental file of size according to the size that presets, therefore can calculate the filename of segmental file at the time point place of pre-broadcast by the positional information that gets access to.
And in the segmental file record, recording size and the filename of each segmental file of above-mentioned multimedia file, and the information such as complete storing path of each segmental file, therefore, after knowing the filename of segmental file, multimedia server just can extract the complete storing path of corresponding segmental file according to above-mentioned segmentation log file.
307, read the content of corresponding segment file according to the complete storing path that extracts, and will send to above-mentioned multimedia-on-demand client with the content of this pre-immediate key frame of playing of time point;
308, judge whether the current segmental file that reads is last segmental file of above-mentioned multimedia file;
If then execution in step 310;
If not, execution in step 309 then.
309, according to the speed of above-mentioned F.F. or the F.F. of fast reverse play acquisition request or rewind down, calculate next time point, repeating step 305;
310, finish playing flow.
Therefore, in the embodiment of the invention, multimedia file is cut into the impartial a plurality of segmental files of size, and be stored in equably on a plurality of hard disks of multimedia server, on the one hand, realized the load balancing of each hard disk in the single multimedia server, on the other hand, multimedia server is when receiving the playing request of multimedia-on-demand client, can directly read the segmental file of corresponding multimedia file from hard disk, improved the response speed of multimedia server to the multimedia-on-demand client, simultaneously, index file and segmentation log file by first hard-disc storage, the content that will play can be located and extract to multimedia server more exactly, and the whole multimedia file need not be sent to the multimedia-on-demand client, reduce the delivery flow rate of unnecessary content of multimedia on network, thereby saved the network bandwidth.
For ease of understanding, playing under normal mode with multimedia file below is example, is described in detail with an application scenarios, can consult Fig. 4, and another embodiment of the multi-medium play method that the embodiment of the invention provides comprises:
Step 401～403 are similar with the description in step 201～203 shown in Figure 2, repeat no more herein.
Step 404～406 are similar with the description in step 304～306 shown in Figure 3, repeat no more herein.
407, read the content of corresponding segment file according to the complete storing path that extracts, and will be from the time point of above-mentioned pre-broadcast, extremely the content of last byte sends to above-mentioned multimedia-on-demand client in the above-mentioned segmental file;
408, judge whether the current segmental file that reads is last segmental file of above-mentioned multimedia file;
If then execution in step 410;
If not, execution in step 409 then.
409, read the content of next segmental file according to the segmentation log file of above-mentioned multimedia file correspondence, send it to above-mentioned multimedia-on-demand client, repeating step 408;
410, finish playing flow.
Therefore, in the embodiment of the invention, multimedia file is cut into the impartial a plurality of segmental files of size, and be stored in equably on a plurality of hard disks of multimedia server, on the one hand, realized the load balancing of each hard disk in the single multimedia server, on the other hand, multimedia server is when receiving the playing request of multimedia-on-demand client, can directly read the segmental file of corresponding multimedia file from hard disk, improved the response speed of multimedia server to the multimedia-on-demand client, simultaneously, index file and segmentation log file by first hard-disc storage, the content that will play can be located and extract to multimedia server more exactly, and the whole multimedia file need not be sent to the multimedia-on-demand client, reduce the delivery flow rate of unnecessary content of multimedia on network, thereby saved the network bandwidth.
Realize that to being used for the memory storage of above-described embodiment multimedia file storage means is described below, see also Fig. 5, the memory storage of a kind of multimedia file that the embodiment of the invention provides comprises:
The first hard disk group 501 is used for storage index file and segmentation log file;
The second hard disk group 502 is used for the multimedia segmental file of storage;
Wherein, in the present embodiment, the first hard disk group 501 has only a hard disk, and the second hard disk group 502 comprises all hard disks except the first hard disk group 501 in the multimedia server;
Multimedia server is when storing multimedia, at first can divide hard disk and use planning, for example, a multimedia server comprises a hard disk groups usually, supposing has N(N in this hard disk groups〉2) hard disk of piece same model, then the 1st hard disk can be belonged to the first hard disk group, to be used for storage index file and segmentation log file, all the other N-1 piece hard disks can be belonged to the second hard disk group, to be used for the multimedia segmental file of storage.
For example, if a multimedia file size is 200,000,000, the size of the segmental file that multimedia server presets is 2,000,000, and then cutter unit 503 is according to the size of the segmental file that presets, this multimedia file can be split into 200/2 segmental file, i.e. 100 segmental files.
Segmental file storage unit 504 is for each hard disk that the segmental file after cutter unit 503 cuttings is stored equably into the second hard disk group 502;
First sets up storage unit 505, is used for setting up index file, and the index file of setting up is stored in the first hard disk group 501;
First sets up storage unit 505 sets up index file according to former multimedia file, to preserve the information of this multimedia file, for example can comprise the filename of this multimedia file, number and the key frame information of key frame (as the I frame) that this multimedia file comprises, version of code stream, video format, audio format and this index file in the time of can also comprising the briefly introducing of this multimedia file, sampling rate, broadcast etc.
Second sets up storage unit 506, is used for setting up the segmentation log file, and the segmentation log file of setting up is stored in the first hard disk group 501.
Second sets up each segmental file after storage unit 506 is cut according to former multimedia file, set up the segmentation log file, to record the information of each segmental file, and the segmentation log file stored in the first hard disk group 501, so that multimedia server when receiving the playing request of multimedia client, gets access to corresponding segmental file according to index file and the segmentation log file stored in the first hard disk group 501.
Wherein, the segmentation log file can comprise size and the filename of each segmental file of this multimedia file, and the complete storing path of each segmental file can also comprise the piece number etc. of the hard disk of memory segment file.
Need to prove, the memory storage of the multimedia file of present embodiment can be used for realizing whole technical schemes of above-mentioned storage means embodiment, the function of its each functional module can be according to the method specific implementation among the said method embodiment, its specific implementation process can repeat no more with reference to the associated description in above-described embodiment herein.
Therefore, in the embodiment of the invention, cutter unit 503 cuts into the impartial a plurality of segmental files of size with multimedia file, and be stored in equably in the second hard disk group 502 by segmental file storage unit 504, on the one hand, realized the load balancing of each hard disk in the single multimedia server, on the other hand, multimedia server is when receiving the playing request of multimedia-on-demand client, can directly read the segmental file of corresponding multimedia file from hard disk, improved the response speed of multimedia server to the multimedia-on-demand client, simultaneously, index file and segmentation log file by 501 storages of the first hard disk group, the content that will play can be located and extract to multimedia server more exactly, and the whole multimedia file need not be sent to the multimedia-on-demand client, reduce the delivery flow rate of unnecessary content of multimedia on network, thereby saved the network bandwidth.
Realize that to being used for the Play System of above-described embodiment method for broadcasting multimedia file is described below, see also Fig. 6, the Play System of a kind of multimedia file that the embodiment of the invention provides comprises:
Receiving element 601 is for the playing request that receives the multimedia-on-demand client;
First acquiring unit 602 is used for obtaining the filename of multimedia file and the start time point of broadcast thereof according to the playing request that receiving element 601 receives;
First judging unit 603 is used for judging whether the index file of above-mentioned multimedia file and segmentation log file all exist, if exist, then triggers second judging unit 604, if do not exist, then triggers end unit 608;
The 3rd judging unit 605 is used for judging whether to receive F.F. or fast reverse play request, if, then trigger first broadcast unit 606, if not, then trigger second broadcast unit 607;
Wherein, first broadcast unit 606 can comprise:
First reads transmitting element, is used for the time point play according to pre-, and index file and segmentation log file read the content of corresponding segmental file, and will send to above-mentioned multimedia-on-demand client with the content of the immediate key frame of time point of pre-broadcast;
In the index file of above-mentioned multimedia file correspondence, recording the information of each key frame of this multimedia file (as the I frame) (as the reproduction time of this key frame in this multimedia file, positional information in this multimedia file etc.), therefore, can be according to from above-mentioned index file, getting access to and the positional information of the immediate key frame of the time point of pre-broadcast in this multimedia file, and multimedia file is to be divided into the impartial segmental file of size according to the size that presets, therefore can calculate the filename of segmental file at the time point place of pre-broadcast by above-mentioned positional information.
In the segmental file record of above-mentioned multimedia file correspondence, recording size and the filename of each segmental file of above-mentioned multimedia file, and the information such as complete storing path of each segmental file, therefore, after knowing the filename of segmental file, multimedia server just can be according to the complete storing path of above-mentioned segmentation log file record, find corresponding segmental file and the content of this segmental file is read out, will send to above-mentioned multimedia-on-demand client with the content of the immediate key frame of time point of pre-broadcast.
The first file judging unit is used for judging whether the current segmental file that reads is last segmental file of above-mentioned multimedia file, if, then trigger end unit 608, if not, then trigger first computing unit;
First computing unit is used for the speed according to above-mentioned F.F. or the F.F. of fast reverse play acquisition request or rewind down, calculates next time point, and triggers first and read transmitting element;
Second reads transmitting element, be used for the time point according to pre-broadcast, index file and segmentation log file read the content of corresponding segmental file, and will be from the time point of pre-broadcast, and the content of last byte sends to above-mentioned multimedia-on-demand client to the segmental file;
The second file judging unit is used for judging whether the current segmental file that reads is last segmental file of above-mentioned multimedia file, if, then trigger above-mentioned end unit 608, if not, then trigger second and read transmitting element;
Third reading is got transmitting element, is used for reading according to the segmentation log file content of next segmental file, sends it to above-mentioned multimedia-on-demand client, and triggers the second file judging unit.
A kind of should scene under, above-mentioned first reads transmitting element can comprise:
First acquiring unit is used for according to index file, obtains and the positional information of the immediate key frame of the time point of pre-broadcast in multimedia file;
First extraction unit is used for according to above-mentioned positional information and segmentation log file, extracts the complete storing path of corresponding segmental file;
First reads the transmission subelement, is used for reading according to the complete storing path that above-mentioned first extraction unit extracts the content of corresponding segmental file, and will send to above-mentioned multimedia-on-demand client with the content of the immediate key frame of time point of pre-broadcast.
Under a kind of application scenarios, above-mentioned second reads transmitting element can comprise:
Second acquisition unit is used for according to index file, obtains and the positional information of the immediate key frame of the time point of pre-broadcast in above-mentioned multimedia file;
Second extraction unit is used for according to above-mentioned positional information and segmentation log file, extracts the complete storing path of corresponding segmental file;
Second reads the transmission subelement, be used for reading according to the complete storing path that second extraction unit extracts the content of corresponding segmental file, and will be from the time point of pre-broadcast, the content of last byte sends to above-mentioned multimedia-on-demand client to the segmental file;
Above-mentioned the 3rd extraction unit specifically can be used for extracting according to the segmentation log file the complete storing path of next segmental file.
Above-mentioned third reading is got the content that transmitting element specifically can be used for reading according to the complete storing path that above-mentioned the 3rd extraction unit extracts next segmental file, sends it to above-mentioned multimedia-on-demand client, and triggers the above-mentioned second file judging unit.
Need to prove, the Play System of the multimedia file of present embodiment can be used for realizing whole technical schemes of above-mentioned player method embodiment, the function of its each functional module can be according to the method specific implementation among the said method embodiment, its specific implementation process can repeat no more with reference to the associated description in above-described embodiment herein.
Therefore, in the embodiment of the invention, multimedia file is cut into the impartial a plurality of segmental files of size, and be stored in equably on a plurality of hard disks of multimedia server, on the one hand, realized the load balancing of each hard disk in the single multimedia server, on the other hand, multimedia server is when receiving the playing request of multimedia-on-demand client, can directly read the segmental file of corresponding multimedia file from hard disk, improved the response speed of multimedia server to the multimedia-on-demand client, simultaneously, index file and segmentation log file by first hard-disc storage, the content that will play can be located and extract to multimedia server more exactly, and the whole multimedia file need not be sent to the multimedia-on-demand client, reduce the delivery flow rate of unnecessary content of multimedia on network, thereby saved the network bandwidth.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be ROM (read-only memory), random access memory, disk or CD etc.
More than storage and access method, relevant apparatus and the system of multimedia file provided by the present invention is described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention, part in specific embodiments and applications all can change, to sum up, this description should not be construed as limitation of the present invention.
Claims (8)
1. the storage means of a multimedia file is characterized in that, comprising:
Divide the first hard disk group and the second hard disk group;
According to the size of the segmental file that presets, multimedia file to be stored is cut into equal-sized a plurality of segmental file;
Described segmental file is stored into equably in each hard disk of the described second hard disk group;
Set up index file, described index file is stored in the described first hard disk group; Described index file comprises: the filename of described multimedia file, the number of the key frame of described multimedia file and key frame information; Described key frame information comprises: positional information and described key frame the reproduction time in described multimedia file of described key frame in described multimedia file;
Set up the segmentation log file, described segmentation log file is stored in the described first hard disk group, so that multimedia server is when receiving the playing request of multimedia client, get access to the content of corresponding segmental file according to described index file and described segmentation log file.
2. method according to claim 1 is characterized in that,
Described segmentation log file comprises:
The filename of described multimedia file, the size of each segmental file and filename, the complete storing path of each segmental file.
3. the player method of a multimedia file is characterized in that, comprising:
Receive the playing request of multimedia-on-demand client;
Obtain the filename of multimedia file and the start time point of broadcast thereof according to described playing request;
Whether index file and the segmentation log file of judging described multimedia file all exist;
If do not exist, then finish playing flow;
If exist, judge then whether described start time point is reasonable;
If unreasonable, then finish playing flow;
If rationally, then judge whether to receive F.F. or fast reverse play request,
If, then carry out F.F. or fast reverse play,
If not, then carrying out normal speed plays;
Wherein, described F.F. or fast reverse play flow process comprise:
A1. according to the pre-time point of playing, described index file and described segmentation log file read the content of corresponding segmental file, and will send to described multimedia-on-demand client with the content of the immediate key frame of time point of described pre-broadcast;
A2. judge whether described segmental file is last segmental file of described multimedia file;
If then finish playing flow;
If not, then according to the speed of described F.F. or the F.F. of fast reverse play acquisition request or rewind down, calculate next time point, repeating step A1;
Described normal speed playing flow comprises:
B1. according to the pre-time point of playing, described index file and described segmentation log file read the content of corresponding segmental file, and will be from the time point of described pre-broadcast, extremely the content of last byte sends to described multimedia-on-demand client in the described segmental file;
B2. judge whether described segmental file is last segmental file of described multimedia file;
If then finish playing flow;
If not, then read the content of next segmental file according to described segmentation log file, send it to described multimedia-on-demand client, repeating step B2;
Described index file comprises: the filename of described multimedia file, the number of the key frame of described multimedia file and key frame information;
Described segmentation log file comprises:
The filename of described multimedia file, the size of each segmental file and filename, the complete storing path of each segmental file;
Wherein, described key frame information comprises:
The positional information of described key frame in described multimedia file, the byte number that described key frame comprises, and the reproduction time of described key frame in described multimedia file;
Described step B1 comprises:
B1. according to described index file, obtain and the positional information of the immediate key frame of the time point of pre-broadcast in described multimedia file;
B2. go out the filename of segmental file at the time point place of pre-broadcast according to described positional information calculation, according to the filename of segmental file, in described segmentation log file, extract the complete storing path of corresponding segmental file;
B3. read the content of described segmental file according to described complete storing path, and will be from the time point of described pre-broadcast, extremely the content of last byte sends to described multimedia-on-demand client in the described segmental file;
Described step B2 is specially:
B4. judge whether described segmental file is last segmental file of described multimedia file;
If then finish playing flow;
If not, then extract the complete storing path of next segmental file according to described segmentation log file, and read the content of described next segmental file according to described complete storing path, send it to described multimedia-on-demand client, repeating step b4.
4. method according to claim 3 is characterized in that, described steps A 1 comprises:
A1. according to described index file, obtain and the positional information of the immediate key frame of the time point of pre-broadcast in described multimedia file;
A2. according to described positional information and described segmentation log file, extract the complete storing path of corresponding segmental file;
A3. read the content of described segmental file according to described complete storing path, and will send to described multimedia-on-demand client with the content of the immediate key frame of time point of described pre-broadcast.
5. the memory storage of a multimedia file is characterized in that, comprising:
The first hard disk group is used for storage index file and segmentation log file;
The second hard disk group is used for the multimedia segmental file of storage;
Cutter unit is used for the size according to the segmental file that presets, and multimedia file to be stored is cut into equal-sized a plurality of segmental file;
The segmental file storage unit is for each hard disk that the segmental file after the described cutter unit cutting is stored equably into the described second hard disk group;
First sets up storage unit, is used for setting up index file, and described index file is stored in the described first hard disk group; Described index file comprises: the filename of described multimedia file, the number of the key frame of described multimedia file and key frame information; Described key frame information comprises: positional information and described key frame the reproduction time in described multimedia file of described key frame in described multimedia file;
Second sets up storage unit, is used for setting up the segmentation log file, and described segmentation log file is stored in the described first hard disk group.
6. device according to claim 5 is characterized in that,
Described first sets up storage unit specifically is used for,
Foundation comprises the filename of described multimedia file, and the number of the key frame of described multimedia file and the index file of key frame information store described index file in the described first hard disk group into;
Described second sets up storage unit specifically is used for,
Foundation comprises the filename of described multimedia file, the size of each segmental file and filename, and the complete storing path of each segmental file stores described segmentation log file in the described first hard disk group into.
7. a multimedia play system is characterized in that, comprising:
Receiving element is for the playing request that receives the multimedia-on-demand client;
First acquiring unit is used for obtaining the filename of multimedia file and the start time point of broadcast thereof according to the playing request that described receiving element receives;
First judging unit is used for judging whether the index file of described multimedia file and segmentation log file all exist, if exist, then triggers second judging unit, if do not exist, then triggers end unit;
Second judging unit is used for judging whether described start time point is reasonable, if rationally, then trigger the 3rd judging unit, if unreasonable, then triggers end unit;
The 3rd judging unit is used for judging whether to receive F.F. or fast reverse play request, if, then trigger first broadcast unit, if not, then trigger second broadcast unit;
End unit is used for finishing playing flow;
Wherein, described first broadcast unit comprises:
First reads transmitting element, be used for the time point according to pre-broadcast, described index file and described segmentation log file read the content of corresponding segmental file, and will send to described multimedia-on-demand client with the content of the immediate key frame of time point of described pre-broadcast;
The first file judging unit is used for judging whether the current segmental file that reads is last segmental file of described multimedia file, if, then trigger described end unit, if not, then trigger first computing unit;
First computing unit is used for the speed according to described F.F. or the F.F. of fast reverse play acquisition request or rewind down, calculates next time point, and triggers described first and read transmitting element;
Described second broadcast unit comprises:
Second reads transmitting element, be used for the time point according to pre-broadcast, described index file and described segmentation log file read the content of corresponding segmental file, and will be from the time point of described pre-broadcast, extremely the content of last byte sends to described multimedia-on-demand client in the described segmental file;
The second file judging unit is used for judging whether the current segmental file that reads is last segmental file of described multimedia file, if, then trigger described end unit, if not, then trigger third reading and get transmitting element;
Third reading is got transmitting element, is used for reading according to described segmentation log file the content of next segmental file, sends it to described multimedia-on-demand client, and triggers the described second file judging unit;
Described index file comprises: the filename of described multimedia file, the number of the key frame of described multimedia file and key frame information;
Described segmentation log file comprises:
The filename of described multimedia file, the size of each segmental file and filename, the complete storing path of each segmental file;
Wherein, described key frame information comprises:
The positional information of described key frame in described multimedia file, the byte number that described key frame comprises, and the reproduction time of described key frame in described multimedia file;
Described second reads transmitting element comprises:
Second acquisition unit is used for according to described index file, obtains and the positional information of the immediate key frame of the time point of pre-broadcast in described multimedia file;
Second extraction unit is used for going out according to described positional information calculation the filename of segmental file at the time point place of pre-broadcast, according to the filename of segmental file, extracts the complete storing path of corresponding segmental file in described segmentation log file;
Second reads the transmission subelement, is used for reading according to described complete storing path the content of described segmental file, and will be from the time point of described pre-broadcast, and extremely the content of last byte sends to described multimedia-on-demand client in the described segmental file;
The 3rd extraction unit is for the complete storing path that extracts next segmental file according to described segmentation log file;
Described third reading is got transmitting element and specifically is used for: the complete storing path that extracts according to described the 3rd extraction unit reads the content of described next segmental file, sends it to described multimedia-on-demand client, and triggers the described second file judging unit.
8. system according to claim 7 is characterized in that,
Described first reads transmitting element comprises:
First acquiring unit is used for according to described index file, obtains and the positional information of the immediate key frame of the time point of pre-broadcast in described multimedia file;
First extraction unit is used for according to described positional information and described segmentation log file, extracts the complete storing path of corresponding segmental file;
First reads the transmission subelement, is used for reading according to the complete storing path that described first extraction unit extracts the content of described segmental file, and will send to described multimedia-on-demand client with the content of the immediate key frame of time point of described pre-broadcast.
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| CN103634616B (en) * | 2012-08-27 | 2018-04-17 | 中兴通讯股份有限公司 | A kind of stream media ordering method and device based on cloud storage |
| CN103873494A (en) * | 2012-12-10 | 2014-06-18 | 联想(北京)有限公司 | Terminal device and information processing method thereof |
| CN103873956B (en) * | 2012-12-12 | 2018-02-13 | 中国电信股份有限公司 | Media file playing method, system, player, terminal and media storage platform |
| CN104346338A (en) * | 2013-07-24 | 2015-02-11 | 腾讯科技（深圳）有限公司 | Multimedia information display method and device for terminal |
| CN103974100B (en) * | 2014-05-20 | 2017-02-15 | 北京速能数码网络技术有限公司 | Media data playing method and device |
| CN105468642A (en) * | 2014-09-09 | 2016-04-06 | 杭州海康威视数字技术股份有限公司 | Data storage method and apparatus |
| CN104581434B (en) * | 2015-01-09 | 2018-06-08 | 上海小蚁科技有限公司 | VOD method and device |
| CN104935858A (en) * | 2015-06-03 | 2015-09-23 | 无锡天脉聚源传媒科技有限公司 | Video file processing method and apparatus |
| CN105245569A (en) * | 2015-08-31 | 2016-01-13 | 上海七牛信息技术有限公司 | Breakpoint uploading method and system |
| CN106658045A (en) * | 2015-10-29 | 2017-05-10 | 阿里巴巴集团控股有限公司 | Cloud storage and cloud download methods for multimedia data and related devices |
| CN106371764A (en) * | 2016-08-23 | 2017-02-01 | 浪潮(北京)电子信息产业有限公司 | Virtual block device-based data processing method and apparatus |
| CN106407297A (en) * | 2016-08-31 | 2017-02-15 | 成都科来软件有限公司 | Data packet downloading management system and method |
| CN107809678B (en) * | 2016-09-09 | 2020-09-08 | 阿里巴巴集团控股有限公司 | Multimedia file processing method, device and equipment |
| CN106407409A (en) * | 2016-09-22 | 2017-02-15 | Tcl集团股份有限公司 | A virtual file system based on DAS architecture storage servers and a file management method thereof |
| CN109819345B (en) * | 2017-11-20 | 2021-08-10 | 网宿科技股份有限公司 | Live video processing method, time shifting method, video processing device and cloud storage system |
| CN110545469B (en) | 2018-05-29 | 2021-07-06 | 北京字节跳动网络技术有限公司 | Webpage playing method, device and storage medium of non-streaming media file |
| CN110493324A (en) * | 2019-07-29 | 2019-11-22 | 咪咕视讯科技有限公司 | Method for down loading, downloader and computer readable storage medium |
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