CN101232407A - Apparatus and method for implementing time shifting broadcast in network monitoring as well as video server - Google Patents
Apparatus and method for implementing time shifting broadcast in network monitoring as well as video server Download PDFInfo
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- CN101232407A CN101232407A CNA2007101610103A CN200710161010A CN101232407A CN 101232407 A CN101232407 A CN 101232407A CN A2007101610103 A CNA2007101610103 A CN A2007101610103A CN 200710161010 A CN200710161010 A CN 200710161010A CN 101232407 A CN101232407 A CN 101232407A
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Abstract
The invention discloses a method for achieving time shift play during network monitoring. The method comprises the following steps that video data acquired by a network video acquiring device during monitoring is stored, and an index is established; the acquired video data is directly transmitted to a monitoring terminal for monitoring in a monitoring state; when receiving a time shift display instruction, a play device is switched to a playback state, a related index is searched according to the time shift display instruction, and the video data directed by the related index to the monitoring terminal device is transmitted to the monitoring terminal device to carry out time shift play. The invention further discloses a device and a video server for implementing time shift play during network monitoring.
Description
Technical field
The present invention relates to the technical field of Network Video Surveillance, relate in particular to a kind of method that realizes switching to time shifting broadcasting, a kind of device of realizing switching to time shifting broadcasting, a kind of method for monitoring network and a kind of network monitoring apparatus from network monitoring from network monitoring.
Background technology
In recent years, along with network technology and rapid development of multimedia, the Network Video Surveillance technology has also obtained significant progress.Fig. 1 shows a kind of network video monitor and control system, and this system comprises:
Formulate the operation management system S14 of the monitoring strategies of each IP Camera, preserve the Database Systems S13 of the monitoring strategies of each IP Camera, the video server S11 that video data to each IP Camera collection is transmitted, preserved, be used for the monitor terminal S12 of monitor staff's telemonitoring IP Camera and acquisition monitoring video, the IP Camera S10 of monitor video source data is provided for video server S11.
The keeper is by can disposing the monitoring period of each IP Camera S10 regularly for each IP Camera S10 distributes one or more monitoring strategies among the operation management system S14.On Monday begin monitoring such as disposing some IP Camera S10, stopped monitoring up to second day till the 9:00, also can require the higher IP Camera S10 of some monitoring rank to carry out the whole day video recording of every day to 18:00 every day of Friday.The keeper is stored in Database Systems S13 by operation management system S14 for the monitoring strategies that each IP Camera S10 disposes.Video server S11 reads the monitoring strategies of each IP Camera S10 from Database Systems S13, create timing analyzer to analyze the monitoring strategies of each IP Camera S10.When arriving the monitoring period of certain IP Camera S10, timer can trigger video server S11 and call out this IP Camera S10 with the startup monitoring, and sets up video transport session.After this IP Camera S10 starts monitoring, can give video server S11 with the monitor video transfer of data that collects.Video server S11 when described video data is transmitted to monitor terminal S12, stores described video data after receiving the video data of this IP Camera S10 transmission.The monitor staff can obtain the video pictures of remote monitoring by monitor terminal S12.
Utilize system shown in Figure 1, can realize remote monitoring well, if but wish that in monitor procedure carrying out time shift (time shift) plays, for example the monitor staff wishes monitored picture is carried out playback in monitor procedure, then can't realize.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method that is used for realizing the network monitoring time shifting broadcasting, it can be implemented in and carry out time shifting broadcasting in the process of carrying out network remote monitoring, thereby makes the monitor staff can carry out the playback of monitored picture in monitor procedure.
For this reason, technical scheme provided by the invention is as follows:
A kind of method that is used for realizing the network monitoring time shifting broadcasting comprises:
Index is preserved and set up to the video data that the Internet video collecting device is gathered in monitoring period on a time period; And,
Under monitor state, the video data of gathering is directly sent to monitoring terminal equipment to monitor;
Switch to playback state when receiving the time shifting broadcasting instruction, by the relevant index of described time shifting broadcasting command lookup, the video data that described relative index is pointed to sends to monitoring terminal equipment to carry out time shifting broadcasting.
Preferably, by computing POS=(TH-TO) * SP/N, search initial index POS;
Wherein, TH represents the temporal information of carrying in the described time shifting broadcasting order, and TO represents the start time information of described monitoring period, and SP represents the transmission code rate of video data, and N represents a bit number in the byte.
Wherein, when described time shifting broadcasting instruction was pause instruction, only the video data that described initial index POS is pointed to sent to monitoring terminal equipment.
Wherein, when described time shifting broadcasting instruction is instructed for rewind down, described initial index POS and follow-up index video data pointed thereof are sent to monitoring terminal equipment.
Preferably, the video data of Internet video collecting device collection is saved as a plurality of video files of fixed size in chronological order one by one, to finish the preservation on a time period of video data.
Another technical problem to be solved by this invention provides a kind of device that is used for realizing the network monitoring time shifting broadcasting, and this device comprises:
Video is preserved the unit, and index is preserved and set up to the video data that is used for the Internet video collecting device is gathered in monitoring period on a time period;
First transmitting element is used under monitor state, and the video data of gathering is directly sent to monitoring terminal equipment to monitor;
Second transmitting element is used for when switching to playback state, preserves the unit by the time shift play command at video and searches relevant index, and the video data that described relative index is pointed to sends to monitoring terminal equipment to carry out time shifting broadcasting.
The state switch unit is used for switching to playback state from monitor state when receiving the time shifting broadcasting instruction.
Preferably, second transmitting element is searched initial index POS by computing POS=(TH-TO) * SP/N;
Wherein, TH represents the temporal information of carrying in the described time shifting broadcasting order, and TO represents the start time information of described monitoring period, and SP represents the transmission code rate of video data, and N represents a bit number in the byte.
Wherein, when described time shifting broadcasting instruction was pause instruction, second transmitting element only sent to monitoring terminal equipment with the video data that described initial index POS points to.
Wherein, when described time shifting broadcasting instruction was instructed for rewind down, second transmitting element sent to monitoring terminal equipment with described initial index POS and follow-up index video data pointed thereof.
Preferably, video is preserved the unit video data of Internet video collecting device collection is saved as a plurality of video files of fixed size in chronological order one by one, to finish the preservation on a time period of video data.
The present invention also provides a kind of video server that is used for realizing the network monitoring time shifting broadcasting, and this video server comprises that being used for the call network video capture device starts the calling unit of monitoring, and also comprises:
Video is preserved the unit, and index is preserved and set up to the video data that is used for the Internet video collecting device is gathered in monitoring period on a time period;
First transmitting element is used under monitor state, and the video data of gathering is directly sent to monitoring terminal equipment to monitor;
Second transmitting element is used for when switching to playback state, preserves the unit by the time shift play command at video and searches relevant index, and the video data that described relative index is pointed to sends to monitoring terminal equipment to carry out time shifting broadcasting.
The state switch unit is used for switching to playback state from monitor state when receiving the time shifting broadcasting instruction.
In the present invention; because index is preserved and set up to the monitor video data that the Internet video collecting device is gathered in monitoring period on a time period; therefore in the process of carrying out network remote monitoring; after receiving time shifting broadcasting instructions such as time-out or rewind down; just can be by searching index; the relevant monitor video data of having preserved are sent to monitoring terminal equipment, thereby realize the playback of monitored picture.Multiple operations such as the monitor staff can play monitored picture under playback state, time-out, rewind down or F.F..In the playback monitored picture,, therefore can avoid the influence of time shifting broadcasting to remote monitoring owing to still index is preserved and set up to the monitor video data of Internet video collecting device collection on a time period.
Description of drawings
Fig. 1 is a kind of schematic diagram of existing network video monitor and control system;
Fig. 2 is a kind of method flow diagram that is used for realizing the network monitoring time shifting broadcasting provided by the invention;
Fig. 3 is a schematic diagram that is used for the time scale bar of time shifting broadcasting;
Fig. 4 is a kind of device schematic diagram that is used for realizing the network monitoring time shifting broadcasting provided by the invention;
Fig. 5 is a kind of schematic diagram that is used for realizing the video server of network monitoring time shifting broadcasting provided by the invention.
Embodiment
Basic thought of the present invention is: in video server, index is preserved and set up to the monitor video data that the Internet video collecting device is gathered in monitoring period on a time period; In the process of carrying out network remote monitoring, after receiving time shifting broadcasting instruction, send to monitoring terminal equipment by searching the monitor video data of having preserved that index will be correlated with, to realize the playback of monitored picture.
For making those skilled in the art understand the present invention better,, be used for realizing that to provided by the invention the method for network monitoring time shifting broadcasting specifies below in conjunction with Fig. 2.For illustrating better, be the embodiment that the monitored picture of an IP Camera is carried out time shifting broadcasting below.
When arriving the monitoring period of certain IP Camera, in step 201, call out this IP Camera and start monitoring, enter monitor state.
In step 202, index is preserved and set up to the monitor video data of IP Camera collection on a time period.Simultaneously, in step 203, the monitor video data of IP Camera collection are directly sent to monitor terminal, so that the monitor staff can obtain the video pictures of remote monitoring by monitor terminal.
Need to prove that the method for the monitor video data being preserved and set up index in step 202 on a time period has a lot, provide a kind of simplely in the present embodiment, be convenient to method of operating.This method comprises:
A1, whole monitoring period is divided into time period of a plurality of equal in length.
Suppose that whole monitoring period is 1 hour, the length of time period is 1 second, and then 1 hour monitoring period will be divided into 3600 time periods.
A2, the monitor video data that IP Camera was gathered in each time period save as video file, and its detailed process comprises:
When the monitor video data arrive, create a video file and preserve the monitor video data, set up the index of this video file;
When described video file size reaches preset value, create a new video file and continue to preserve the monitor video data, set up the index of new video file.
As can be seen, because the length T of time period is can be predetermined, the speed R of monitor video data also is can be predetermined, and the size that therefore can be identified for preserving the video file of each time period monitor video data is T * R.
For convenient follow-up searching, the index of each video file can be kept in the index file, this index file and described IP Camera have relation one to one.
When creating a video file in chronological order, correspondingly can set up an index record for this video file sequentially in the indexed file.When the monitor video data are saved as video file, all can upgrade the detailed content of this index record.
Every index record mainly comprises following information:
The establishment of the video file of this index correspondence is T1 constantly, and for example: 2007-11-12 12:12:00, T1 are the absolute times of system when creating video file;
Preserve the moment T2 of monitor video data for the last time to the video file of described correspondence, for example: 2007-11-12 12:12:59, T2 also are the absolute times of system.
In step 204, when receiving the time shifting broadcasting instruction, switch to playback state.Here said time shifting broadcasting instruction comprises pause instruction and rewind down instruction.
In step 205, by the relevant index of described time shifting broadcasting command lookup.Here said relative index comprises the follow-up index of needed initial index of time shifting broadcasting and initial index.
By computing POS=(TH-TO) * SP/N, search initial index POS.
Wherein, TH represents the temporal information of carrying in the described time shifting broadcasting order, and TO represents the zero-time of described monitoring period, and SP represents the transmission code rate of monitor video data, and N represents bit (bit) number in the byte (byte), and N is generally 8.TH and TO are the absolute times of system.
In step 206, the monitor video data that described relative index is pointed to send to monitor terminal, thereby realize time shifting broadcasting.
When the time shift play instruction is pause instruction, as long as the monitor video data that initial index POS is pointed to send to monitor terminal;
When the time shift play instruction is the rewind down instruction, not only to the monitor video data that initial index POS is pointed send to monitor terminal, monitor video data that also will follow-up index is pointed send to monitor terminal.
Need to prove, in execution in step 204, step 205 and step 206, all the time in execution in step 202.
Below, in conjunction with a concrete application scenarios, the foregoing description is made more specific description.
The monitoring period of supposing IP Camera for 2007-11-12 12:00:00 to 2007-11-12
13:00:00, monitor staff need suspend monitored picture at that time when 2007-11-12 12:43:21, then when carrying out time shifting broadcasting, need to calculate earlier the initial index of time shifting broadcasting.At this moment, TO is 2007-11-1212:00:00, and TH is 2007-11-12 12:43:21, supposes that SP is 400bit/s, and a byte has 8 bit, the then initial index POS=of shellfish (2007-11-12 12:43:21-2007-11-12 12:00:00) * 400/8.
After obtaining initial index POS, the video data that initial index POS is pointed to sends to monitor terminal and gets final product.
When supposing that the monitor staff need retreat to 2007-11-12 12:30:23 soon and carries out playback when 2007-11-12 12:43:21, then still need to calculate earlier the initial index of time shifting broadcasting.At this moment, TH is 2007-11-1212:30:23, other parameter constant, then initial index POS=(2007-11-12 12:30:23-2007-11-12 12:00:00) * 400/8.
After obtaining initial index POS, not only initial index POS video data pointed to be sent to monitor terminal, also will send to monitor terminal by the video data that follow-up index is pointed.
At monitor terminal, can be according to the monitor video data rise time scale strip of video server preservation, as shown in Figure 3.Comprise date and time information, information such as hour, minute, second in the time scale bar.The time scale bar is divided with 24 hours systems, can judge that according to monitoring strategies there are the monitor video data which on the same day time period, need bar under the time scale, to indicate that there are the monitor video data which section period, there is the part of monitor data to show by special marking (for example dark).
The monitor staff can service time date about scale strip button that rolls come option date, whenever be turned to a new date, bar will regenerate once according to monitoring strategies.The monitor staff can be played back to monitored picture sometime by clicking bar or dragging the instruction that these two kinds of methods of positioning strip are imported time shifting broadcasting fast.There is not the monitor video section data will make invalidation to this.
Comprise two states in the time scale bar: monitor state and playback state.
Monitor state is default conditions, and what the monitor staff watched under this monitor state all is the real-time monitored picture of IP Camera, can carry out controls such as The Cloud Terrace.Under monitor state: suspend, stop, fast backward button is effective.
The monitor staff suspends under monitor state or during fast reverse operation, will enter playback state.Under playback state, play, stop, button such as F.F. and rewind down is all effective.
No matter at monitor state still at playback state, the monitor staff will enter the session closed condition as long as carry out shut-down operation.At this moment, neither at monitor state, also not at playback state.Only broadcast button is effective under the session closed condition.
In the above-described embodiments, because index is preserved and set up to the monitor video data that IP Camera is gathered in monitoring period on a time period, therefore in the process of carrying out network remote monitoring, after receiving the time shifting broadcasting instruction, just can be by searching index, the relevant monitor video data of having preserved are sent to monitor terminal, thereby realize the playback of monitored picture.
Multiple operations such as the monitor staff can play monitored picture under playback state, time-out, rewind down or F.F..In the playback monitored picture,, therefore can avoid the influence of time shifting broadcasting to remote monitoring owing to still index is preserved and set up to the monitor video data of IP Camera collection on a time period.
Those skilled in the art though the foregoing description is the explanation that the time shifting broadcasting of an IP Camera is done, if the method for this embodiment is applied to a plurality of IP Cameras respectively, can realize the time shifting broadcasting to a plurality of IP Cameras as can be seen.
Those skilled in the art it can also be seen that the realization of the foregoing description is not limited to IP Camera, and suitable equally for other Internet video collecting device, this does not give unnecessary details.
The present invention also provides a kind of device and a kind of video server that is used for realizing the network monitoring time shifting broadcasting that is used for realizing the network monitoring time shifting broadcasting.
For illustrating better, be the embodiment that the monitored picture of an IP Camera is carried out time shifting broadcasting below.Fig. 4 shows a kind of device S40 that is used for realizing the network monitoring time shifting broadcasting, and this device S40 comprises video preservation cell S 41, the first transmitting element S42, the second transmitting element S43 and state switch unit S44.
When arriving the monitoring period of certain IP Camera, video server will be called out this IP Camera and start monitoring, and state switch unit S44 enters monitor state.
Index is preserved and set up to the monitor video data that video preservation cell S 41 is used for IP Camera is gathered in monitoring period on a time period.Simultaneously, the first transmitting element S42 directly sends to monitor terminal with the monitor video data of IP Camera collection, so that the monitor staff can obtain the video pictures of remote monitoring by monitor terminal.
Need to prove that video is preserved cell S 41 and the monitor video data preserved and set up the method for index on a time period and have a lot, provide a kind of simplely here, be convenient to method of operating.This method comprises:
A1, whole monitoring period is divided into time period of a plurality of equal in length.
A2, the monitor video data that IP Camera was gathered in each time period save as video file, and its detailed process comprises:
When the monitor video data arrive, create a video file and preserve the monitor video data, set up the index of this video file;
When described video file size reaches preset value, create a new video file and continue to preserve the monitor video data, set up the index of new video file.
For convenient follow-up searching, the index of each video file can be kept in the index file, this index file and described IP Camera have relation one to one.
When creating a video file in chronological order, correspondingly can set up an index record for this video file sequentially in the indexed file.When the monitor video data are saved as video file, all can upgrade the detailed content of this index record.
When receiving the time shifting broadcasting instruction, state switch unit S44 switches to playback state from monitor state.Here said time shifting broadcasting instruction comprises pause instruction and rewind down instruction.
When switching to playback state, the second transmitting element S43 will preserve cell S 41 at video by the time shift play command and search relevant index, and the video data that described relative index is pointed to sends to monitoring terminal equipment to carry out time shifting broadcasting.Here said relative index comprises the follow-up index of needed initial index of time shifting broadcasting and initial index.
The second transmitting element S43 searches initial index POS by computing POS=(TH-TO) * SP/N.
When described time shifting broadcasting instruction was pause instruction, the monitor video data that the second transmitting element S43 only points to described initial index POS sent to monitor terminal and get final product.
When described time shifting broadcasting instruction was instructed for rewind down, the second transmitting element S43 not only will the monitor video data that initial index POS is pointed send to monitor terminal, and monitor video data that also will follow-up index is pointed send to monitor terminal.
In device shown in Figure 4, because index is preserved and set up to the monitor video data that IP Camera is gathered in monitoring period on a time period, therefore in the process of carrying out network remote monitoring, after receiving the time shifting broadcasting instruction, just can be by searching index, the relevant monitor video data of having preserved are sent to monitor terminal, thereby realize the playback of monitored picture.
Multiple operations such as the monitor staff can play monitored picture under playback state, time-out, rewind down or F.F..In the playback monitored picture, because preserving cell S 41, video still index is preserved and set up to the monitor video data of IP Camera collection on a time period, therefore can avoid the influence of time shifting broadcasting to remote monitoring.
Those skilled in the art though device shown in Figure 4 is the explanation that the time shifting broadcasting of an IP Camera is done, if device shown in Figure 4 is applied to a plurality of IP Cameras respectively, can realize the time shifting broadcasting to a plurality of IP Cameras as can be seen.
Those skilled in the art it can also be seen that, device shown in Figure 4, and its realization is not limited to IP Camera, and suitable equally for other Internet video collecting device, this does not give unnecessary details.
Fig. 5 shows a kind of video server S50 that is used for realizing the network monitoring time shifting broadcasting, and this video server S50 comprises calling unit S51, video preservation cell S 41, the first transmitting element S42, the second transmitting element S43 and state switch unit S44.
When arriving the monitoring period of certain IP Camera, calling unit S51 will call out this IP Camera and start monitoring, and state switch unit S44 enters monitor state.
Index is preserved and set up to the monitor video data that video preservation cell S 41 is used for IP Camera is gathered in monitoring period on a time period.Simultaneously, the first transmitting element S42 directly sends to monitor terminal with the monitor video data of IP Camera collection, so that the monitor staff can obtain the video pictures of remote monitoring by monitor terminal.
When receiving the time shifting broadcasting instruction, state switch unit S44 switches to playback state from monitor state.Here said time shifting broadcasting instruction comprises pause instruction and rewind down instruction.
When switching to playback state, the second transmitting element S43 will preserve cell S 41 at video by the time shift play command and search relevant index, and the video data that described relative index is pointed to sends to monitoring terminal equipment to carry out time shifting broadcasting.Here said relative index comprises the follow-up index of needed initial index of time shifting broadcasting and initial index.
The second transmitting element S43 searches initial index POS by computing POS=(TH-TO) * SP/N.
When described time shifting broadcasting instruction was pause instruction, the monitor video data that the second transmitting element S43 only points to described initial index POS sent to monitor terminal and get final product.
When described time shifting broadcasting instruction was instructed for rewind down, the second transmitting element S43 not only will the monitor video data that initial index POS is pointed send to monitor terminal, and monitor video data that also will follow-up index is pointed send to monitor terminal.
According to described disclosed embodiment, can be so that those skilled in the art can realize or use the present invention.To those skilled in the art, the various modifications of these embodiment are conspicuous, and the general principles of definition here also can be applied to other embodiment on the basis that does not depart from the scope of the present invention with purport.Above-described embodiment only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a method that is used for realizing the network monitoring time shifting broadcasting is characterized in that, comprising:
Index is preserved and set up to the video data that the Internet video collecting device is gathered in monitoring period on a time period; And,
Under monitor state, the video data of gathering is directly sent to monitoring terminal equipment to monitor;
Switch to playback state when receiving the time shifting broadcasting instruction, by the relevant index of described time shifting broadcasting command lookup, the video data that described relative index is pointed to sends to monitoring terminal equipment to carry out time shifting broadcasting.
2. the method for claim 1 is characterized in that, by computing POS=(TH-TO) * SP/N, searches initial index POS;
Wherein, TH represents the temporal information of carrying in the described time shifting broadcasting order, and TO represents the start time information of described monitoring period, and SP represents the transmission code rate of video data, and N represents a bit number in the byte.
3. method as claimed in claim 2 is characterized in that, when described time shifting broadcasting instruction was pause instruction, only the video data that described initial index POS is pointed to sent to monitoring terminal equipment.
4. method as claimed in claim 2 is characterized in that, when described time shifting broadcasting instruction is instructed for rewind down, described initial index POS and follow-up index video data pointed thereof is sent to monitoring terminal equipment.
5. as the arbitrary described method of claim 1 to 4, it is characterized in that, the video data of Internet video collecting device collection is saved as a plurality of video files of fixed size in chronological order one by one, to finish the preservation on a time period of video data.
6. a device that is used for realizing the network monitoring time shifting broadcasting is characterized in that, comprising:
Video is preserved the unit, and index is preserved and set up to the video data that is used for the Internet video collecting device is gathered in monitoring period on a time period;
First transmitting element is used under monitor state, and the video data of gathering is directly sent to monitoring terminal equipment to monitor;
Second transmitting element is used for when switching to playback state, preserves the unit by the time shift play command at video and searches relevant index, and the video data that described relative index is pointed to sends to monitoring terminal equipment to carry out time shifting broadcasting;
The state switch unit is used for switching to playback state from monitor state when receiving the time shifting broadcasting instruction.
7. device as claimed in claim 6 is characterized in that, second transmitting element is searched initial index POS by computing POS=(TH-TO) * SP/N;
Wherein, TH represents the temporal information of carrying in the described time shifting broadcasting order, and TO represents the start time information of described monitoring period, and SP represents the transmission code rate of video data, and N represents a bit number in the byte.
8. device as claimed in claim 7 is characterized in that, when described time shifting broadcasting instruction was pause instruction, second transmitting element only sent to monitoring terminal equipment with the video data that described initial index POS points to.
9. device as claimed in claim 7 is characterized in that, when described time shifting broadcasting instruction was instructed for rewind down, second transmitting element sent to monitoring terminal equipment with described initial index POS and follow-up index video data pointed thereof.
10. as the arbitrary described device of claim 6 to 9, it is characterized in that, video is preserved the unit video data of Internet video collecting device collection is saved as a plurality of video files of fixed size in chronological order one by one, to finish the preservation on a time period of video data.
11. a video server that is used for realizing the network monitoring time shifting broadcasting comprises being used for the calling unit that the call network video capture device starts monitoring, it is characterized in that, also comprises:
Video is preserved the unit, and index is preserved and set up to the video data that is used for the Internet video collecting device is gathered in monitoring period on a time period;
First transmitting element is used under monitor state, and the video data of gathering is directly sent to monitoring terminal equipment to monitor;
Second transmitting element is used for when switching to playback state, preserves the unit by the time shift play command at video and searches relevant index, and the video data that described relative index is pointed to sends to monitoring terminal equipment to carry out time shifting broadcasting;
The state switch unit is used for switching to playback state from monitor state when receiving the time shifting broadcasting instruction.
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2007
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