CN103974013A - Method for playing back video recording and video recording device - Google Patents
Method for playing back video recording and video recording device Download PDFInfo
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- CN103974013A CN103974013A CN201310028084.5A CN201310028084A CN103974013A CN 103974013 A CN103974013 A CN 103974013A CN 201310028084 A CN201310028084 A CN 201310028084A CN 103974013 A CN103974013 A CN 103974013A
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Abstract
The invention discloses a method for playing back video recording and a video recording device. The method includes the steps of reading file messages of video recording files within the set time period after the start moment from a data storage area, and storing the file messages to an index buffer area, wherein the set time period is shorter than the playback time period; reading the file messages in the index buffer area one by one, and judging whether the number of the unread file messages in the index buffer area is larger than or equal to a set threshold value or not; if not, reading file messages of subsequent video recording files from the data storage area, storing the file messages to the index buffer area, and covering the read file messages with the file messages if no free space exists in the index buffer area when the file messages are stored. The method can give a rapid response to playback of video recording, and the number of the video recording files which are played back can be increased.
Description
Technical field
The present invention relates to multimedia data processing, relate in particular to the method and the video record equipment that carry out video record playback.
Background technology
At present, the scheme of carrying out video record comprises: video record equipment gathers video data, in data storage area with the mode stored video data of video file; Each video file has comprised the video recording data in unit interval, and this unit interval is for example 10 seconds; In storage video file, video record equipment is also stored the fileinfo of corresponding video file in data storage area, this file packets of information, containing the descriptor of corresponding video file, is specially: the information such as the address of video time, capacity and the video file that video file is corresponding in data storage area.
In data storage area, store after video file, can carry out the playback of video record.In existing scheme of carrying out video record playback, the fileinfo of all video files in playback duration section all need to be read out, be stored in index buffering area; Afterwards, then read one by one the fileinfo in index buffering area, from data storage area, read video data according to fileinfo, play.Described playback duration section is for example 24 hours after the zero hour.
Adopt existing scheme of carrying out video record playback, after the fileinfo of all video files in playback duration section all need to being read out, carry out obtaining and playing of video data again, the time that causes responding playback is longer; And, due to the limited space of index buffering area, can only, at the limited fileinfo of index buffer stores, limit the video file number that carries out playback, cause time of video recording data of playback shorter.
As fully visible, there is following defect in existing scheme of carrying out video record playback: can not respond fast the playback of video record, and limit the video file number that carries out playback.
Summary of the invention
The invention provides a kind of method of carrying out video record playback, the method can respond the playback of video record fast, and can increase the video file number of playback.
The invention provides a kind of video record equipment, this video record equipment can respond the playback of video record fast, and can increase the video file number of playback.
A method of carrying out video record playback, the method comprises:
The fileinfo that reads the video file in setting-up time section after the zero hour from data storage area, by file information storage, in index buffering area, described setting-up time section is less than playback duration section;
File reading information one by one in index buffering area, judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.
A kind of video record equipment, this video record equipment comprises playback module, search interactive module, backstage search module, index buffering area and data storage area;
Described playback module, receives play-back command, sends to search interactive module; And receive the video file from described search interactive module, play;
Described search interactive module, receives play-back command, sends to backstage search module, and in index buffering area file reading information one by one, from data storage area, read video file according to the fileinfo reading, send to playback module; From index buffering area, when file reading information, also judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, send the search instruction that continues to described backstage search module;
Described backstage search module, receives play-back command, reads the fileinfo of the video file in setting-up time section after the zero hour from data storage area, and by file information storage, in index buffering area, described setting-up time section is less than playback duration section; Also receive the search instruction that continues, read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.
Can find out from such scheme, in the present invention, read the fileinfo of the video file in setting-up time section after the zero hour, store in index buffering area, described setting-up time section is less than playback duration section; File reading information one by one in index buffering area, judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.The present invention stores the fileinfo in setting-up time section in index buffering area, just can carry out reading of video file by the fileinfo based on storage; Because setting-up time section is less than playback duration section, shorten the time of response playback; And, renew the follow-up fileinfo of storage to index buffering area relaying simultaneously, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read, like this, although the limited space of index buffering area adopts the circulate mode of storage file information of the present invention, can break through the restriction of playback video file number, with the video recording data in playback longer time section.
Brief description of the drawings
Fig. 1 is the method indicative flowchart that the present invention carries out video record playback;
Fig. 2 is the buffer memory signal legend one of index of the present invention buffering area;
Fig. 3 is the method flow diagram example that the present invention carries out video record playback;
Fig. 4 is the buffer memory signal legend two of index of the present invention buffering area;
Fig. 5 is the structural representation of video record equipment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
The present invention stores than the fileinfo in the little setting-up time section of playback duration section in index buffering area; And, simultaneously renew the follow-up fileinfo of storage to index buffering area relaying, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read; Thereby, realized the playback of quick response video record, and increased the video file number of playback.
Referring to Fig. 1, be the method indicative flowchart that the present invention carries out video record playback, it comprises the following steps:
Step 101, reads the fileinfo of the video file in setting-up time section after the zero hour from data storage area, by file information storage, in index buffering area, described setting-up time section is less than playback duration section.
Described playback duration section is for example 48 hours after the zero hour, setting-up time section as required setting example as be afterwards the 2 minutes zero hour; Setting-up time can also be the time of a video file, as long as namely can search many fileinfos to first video file, will respond more rapidly like this playback.
Step 102, file reading information one by one in index buffering area, judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.
In this step, if the fileinfo number not being read of judging in index buffering area is more than or equal to setting threshold, do not carry out reading of fileinfo; If the fileinfo number not being read of judging in index buffering area is less than setting threshold, continue to read follow-up fileinfo; This setting threshold can be chosen as required, for example, be 20.
Store video file in index buffering area time, if index buffering area does not have clearance spaces, cover the fileinfo being read, i.e. region between base pointer and read pointer in coverage diagram 2.
In index buffering area, store fileinfo, just can carry out the broadcasting of video file by the fileinfo based on storage, specifically comprised:
Receive play-back command;
According to the fileinfo reading one by one from index buffering area, from data storage area, obtain the video file that fileinfo is corresponding and play.
Receiving play-back command can carry out before step 101, namely, receiving after play-back command, just carried out the storage of fileinfo and the broadcasting of video file; Also can, after storage file information, if receive play-back command and carry out again the broadcasting of video file, concrete as, if receive play-back command after step 101, just carry out the broadcasting of video file.
Video record equipment gathers video data in advance, in data storage area with the mode stored video data of video file; Each video file has comprised the video recording data in unit interval, and this unit interval is for example 10 seconds; In storage video file, video record equipment is also stored the fileinfo of corresponding video file in data storage area, this file packets of information, containing the descriptor of corresponding video file, is specially: the information such as the address of video time, capacity and the video file that video file is corresponding in data storage area.In data storage area, store after video file, just can carry out the playback of video record.
In index buffering area when storage file information, can be specifically taking base pointer as datum mark, in the position writing in files information of write pointer instruction; Correspondingly, when file reading information, taking base pointer as datum mark, in the position file reading information of read pointer instruction.Referring to Fig. 2, for the buffer memory schematic diagram of index buffering area, in figure, write pointer and read pointer all move towards buffering area direction, region between base pointer and read pointer is for playback but also do not have chlamydate fileinfo, region between read pointer and base pointer is not playback, the fileinfo not being read; In figure, grey color part is the region of writing in files information.Receiving play-back command, carry out after video playback, user can carry out time drag operation, reorientates the start time point that carries out playback; For this situation, the present invention also comprises the playback flow process shown in Fig. 3, particularly:
Step 301, receives and comprises the forward that drags rear time point and drag instruction.
Step 302, whether judgement drags the fileinfo that rear time point is corresponding and is stored in index buffering area, if so, performs step 303, otherwise execution step 304.
Step 303, read pointer position in index buffering area is updated to and drags the fileinfo position that rear time point is corresponding, the position of read pointer instruction after renewal, file reading information one by one, and from data storage area, read video file according to the fileinfo reading, carry out playback.
Step 304, empties index buffering area, from data storage area read drag the fileinfo in setting-up time section after time point, by file information storage in index buffering area.
Step 305, file reading information one by one in index buffering area reads video file according to the fileinfo reading from data storage area, carries out playback.
Step 306, each from index buffering area when file reading information, also judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, continue to read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.
In this step, if the fileinfo number not being read of judging in index buffering area is more than or equal to setting threshold, do not carry out reading of fileinfo; If the fileinfo number not being read of judging in index buffering area is less than setting threshold, continue to read follow-up fileinfo.
Carrying out in the process of video playback, user can carry out button operation, just putting and put upside down between switching; For switching to situation about putting upside down by just putting, the present invention also comprises:
The reception instruction of putting upside down;
Change original write pointer into base pointer, change original base pointer into write pointer.
Carry out after pointer replacing, still carry out video playback according to playback mode before.Referring to Fig. 4, be index of the present invention buffering area pointer change schematic diagram example, afterwards, read pointer to change after write pointer direction carry out reading of fileinfo.
Above-mentioned for to switch to by just putting the example of putting upside down, if desired will put upside down just to switch to and put, mode is similar, changes write pointer before into base pointer, changes base pointer before into write pointer.
In the time that needs finish video playback, user clicks and exits button, and correspondingly, the present invention also comprises:
Receive exit instruction;
Stop from index buffering area file reading information, and empty the fileinfo in index buffering area.
The present invention stores after the fileinfo in setting-up time section in index buffering area, and just the fileinfo based on storage carries out reading of video file; Because setting-up time section is less than playback duration section, shorten the time of response playback; And, renew the follow-up fileinfo of storage to index buffering area relaying simultaneously, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read, like this, although the limited space of index buffering area adopts the circulate mode of storage file information of the present invention, can break through the restriction of playback video file number, with the video recording data in playback longer time section.
Referring to Fig. 5, be the structural representation of video record equipment of the present invention, this video record equipment comprises playback module, search interactive module, backstage search module, index buffering area and data storage area;
Described playback module, receives play-back command, sends to search interactive module; And receive the video file from described search interactive module, play;
Described search interactive module, receives play-back command, sends to backstage search module, and in index buffering area file reading information one by one, from data storage area, read video file according to the fileinfo reading, send to playback module; From index buffering area, when file reading information, also judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, send the search instruction that continues to described backstage search module;
Described backstage search module, receives play-back command, reads the fileinfo of the video file in setting-up time section after the zero hour from data storage area, and by file information storage, in index buffering area, described setting-up time section is less than playback duration section; Also receive the search instruction that continues, read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.
Preferably, described backstage search module comprises and writes submodule, taking the base pointer of index buffering area as datum mark, the fileinfo reading write to the position of write pointer instruction index buffering area from data storage area;
Described search interactive module comprises reading submodule, receives after play-back command, taking the base pointer of index buffering area as datum mark, in the position of read pointer instruction, file reading information one by one.
The video record equipment of Fig. 5 is, after reception play-back command, just to carry out the storage of fileinfo and the specific implementation that video file is play.
Preferably, described playback module, also receives and comprises the forward that drags rear time point and drag instruction, sends to search interactive module;
Described search interactive module, reception comprises the forward that drags rear time point and drags instruction, whether judgement drags the fileinfo that rear time point is corresponding and is stored in index buffering area, if, read pointer position in index buffering area is updated to and drags the fileinfo position that rear time point is corresponding, the position of read pointer instruction after renewal, file reading information one by one, and from data storage area, read video file according to the fileinfo reading, send to playback module; If be not stored in index buffering area, empty index buffering area, send described forward to described backstage search module and drag instruction, and in index buffering area file reading information one by one, from data storage area, read video file according to the fileinfo reading, send described background module, from index buffering area when file reading information, also judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, send and search for the instruction that continues to described backstage search module;
Described backstage search module, receives forward and drags instruction, from data storage area read drag the fileinfo in setting-up time section after time point, by file information storage in index buffering area; Also receive the search instruction that continues, read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.
Preferably, described playback module, also receives the instruction of putting upside down, sends to search interactive module;
Described search interactive module, receives the instruction of putting upside down, changes write pointer original in index buffering area into base pointer, changes original base pointer into write pointer.
Preferably, described playback module, also receives exit instruction, sends to search interactive module;
Described search interactive module, receives exit instruction, stops from index buffering area file reading information, and empties the fileinfo in index buffering area.
Video record equipment of the present invention refers to that the various video datas that carry out record and the equipment of playback, concrete as digital hard disc video recorder; This video record equipment can have one and record passage, also can have multiple tracks and record passage.
When user carries out the relevant operation of playback, the present invention program only searches for the video file in very short a period of time, just can start to carry out playing back videos, in the process of playing back videos, search for remaining fileinfo by backstage search mission, thereby respond fast the operation that playback is relevant.
And, by setting up the mode of loop index buffering area, in the process of fileinfo search, carry out playing back videos simultaneously, thus make can playback video file break through the video file number restriction bringing due to buffer size.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (11)
1. a method of carrying out video record playback, is characterized in that, the method comprises:
The fileinfo that reads the video file in setting-up time section after the zero hour from data storage area, by file information storage, in index buffering area, described setting-up time section is less than playback duration section;
File reading information one by one in index buffering area, judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.
2. the method for claim 1, is characterized in that, the method also comprises:
Receive play-back command, according to the fileinfo reading one by one from index buffering area, from data storage area, obtain the video file that fileinfo is corresponding and play.
3. method as claimed in claim 1 or 2, is characterized in that, described file information storage is comprised to index buffering area: taking the base pointer of index buffering area as datum mark, fileinfo is write to the position of write pointer instruction;
Described in index buffering area one by one file reading information comprise: taking the base pointer of index buffering area as datum mark, in the position of read pointer instruction, file reading information one by one.
4. method as claimed in claim 2, is characterized in that, the method also comprises:
Receive after play-back command, also receive and comprise the forward that drags rear time point and drag instruction;
Whether judgement drags the fileinfo that rear time point is corresponding and is stored in index buffering area, if, read pointer position in index buffering area is updated to and drags the fileinfo position that rear time point is corresponding, the position of read pointer instruction after renewal, file reading information one by one, and from data storage area, read video file according to the fileinfo reading, carry out playback; Otherwise:
Empty index buffering area, then from data storage area read drag the fileinfo in setting-up time section after time point, by file information storage in index buffering area;
File reading information one by one in index buffering area reads video file according to the fileinfo reading from data storage area, carries out playback;
From index buffering area when file reading information, also judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, continue to read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.
5. method as claimed in claim 2, is characterized in that, the method also comprises:
Receive after play-back command, also receive the instruction of putting upside down;
Change original write pointer into base pointer, change original base pointer into write pointer.
6. method as claimed in claim 2, is characterized in that, the method also comprises:
Receive after play-back command, receive exit instruction;
Stop from index buffering area file reading information, and empty the fileinfo in index buffering area.
7. a video record equipment, is characterized in that, this video record equipment comprises playback module, search interactive module, backstage search module, index buffering area and data storage area;
Described playback module, receives play-back command, sends to search interactive module; And receive the video file from described search interactive module, play;
Described search interactive module, receives play-back command, sends to backstage search module, and in index buffering area file reading information one by one, from data storage area, read video file according to the fileinfo reading, send to playback module; From index buffering area, when file reading information, also judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, send the search instruction that continues to described backstage search module;
Described backstage search module, receives play-back command, reads the fileinfo of the video file in setting-up time section after the zero hour from data storage area, and by file information storage, in index buffering area, described setting-up time section is less than playback duration section; Also receive the search instruction that continues, read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.
8. video record equipment as claimed in claim 7, it is characterized in that, described backstage search module comprises and writes submodule, taking the base pointer of index buffering area as datum mark, the fileinfo reading write to the position of write pointer instruction index buffering area from data storage area;
Described search interactive module comprises reading submodule, receives after play-back command, taking the base pointer of index buffering area as datum mark, in the position of read pointer instruction, file reading information one by one.
9. video record equipment as claimed in claim 8, is characterized in that, described playback module also receives and comprises the forward that drags rear time point and drag instruction, sends to search interactive module;
Described search interactive module, reception comprises the forward that drags rear time point and drags instruction, whether judgement drags the fileinfo that rear time point is corresponding and is stored in index buffering area, if, read pointer position in index buffering area is updated to and drags the fileinfo position that rear time point is corresponding, the position of read pointer instruction after renewal, file reading information one by one, and from data storage area, read video file according to the fileinfo reading, send to playback module; If be not stored in index buffering area, empty index buffering area, send described forward to described backstage search module and drag instruction, and in index buffering area file reading information one by one, from data storage area, read video file according to the fileinfo reading, send described background module, from index buffering area when file reading information, also judge whether the fileinfo number not being read in index buffering area is more than or equal to setting threshold, if not, send and search for the instruction that continues to described backstage search module;
Described backstage search module, receives forward and drags instruction, from data storage area read drag the fileinfo in setting-up time section after time point, by file information storage in index buffering area; Also receive the search instruction that continues, read the fileinfo of follow-up video file from data storage area, store in index buffering area, if index buffering area does not have clearance spaces when storage, cover the fileinfo being read.
10. video record equipment as claimed in claim 8, is characterized in that, described playback module also receives the instruction of putting upside down, sends to search interactive module;
Described search interactive module, receives the instruction of putting upside down, changes write pointer original in index buffering area into base pointer, changes original base pointer into write pointer.
11. video record equipment as claimed in claim 8, is characterized in that, described playback module, also receives exit instruction, sends to search interactive module;
Described search interactive module, receives exit instruction, stops from index buffering area file reading information, and empties the fileinfo in index buffering area.
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| CN201310028084.5A CN103974013B (en) | 2013-01-24 | 2013-01-24 | Carry out the method and video record equipment of video record playback |
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