CN104683738A - Method for storing vehicle-mounted DVR (Digital Video Recorder) alarm recording fragments - Google Patents
Method for storing vehicle-mounted DVR (Digital Video Recorder) alarm recording fragments Download PDFInfo
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- CN104683738A CN104683738A CN201310619038.2A CN201310619038A CN104683738A CN 104683738 A CN104683738 A CN 104683738A CN 201310619038 A CN201310619038 A CN 201310619038A CN 104683738 A CN104683738 A CN 104683738A
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Abstract
The invention discloses a method for storing vehicle-mounted DVR (Digital Video Recorder) alarm recording fragments. The method comprises the following steps: changing ordinary recording started at a first delayed moment before an alarming moment into alarm recording, and changing recording starting from a second delayed moment after the end of alarming into ordinary recording in order to obtain an alarm recording file from the first delayed moment to the second delayed moment; and when a backup server acquires the alarm recording file from a vehicle-mounted DVR, judging whether or not the acquired alarm recording file is complete by comparing alarm recording file information with a local alarm recording file, and instructing the vehicle-mounted DVR to start uploading the alarm recording file to the backup server through an upload command with a file offset in order to realize breakpoint resume. Through adoption of the method, the recording time before and after the alarming moment can be prolonged; complete accident causes are recorded in alarm recording; and complete uploading of alarm recording data is ensured when a 3G network is unobstructed.
Description
Technical field
The present invention relates to Vehicular video monitoring field, particularly one stores vehicle-mounted DVR(Digital Video Recorder, DVR) method of warning video clip.
Background technology
Vehicle-mounted DVR belongs to the segmentation field of traditional built-in hard disk video tape recorder, and it is the emerging special product of one applied on vehicle along with digital video-audio coding techniques and grow up.Vehicle-mounted DVR is widely used in the various mobile traffic such as public transport, long-distance passenger transportation.
When being applied to long-distance passenger transportation, bus, need immediately to upload the video clip of DVR vehicle-mounted when having an accident, that is recorded by vehicle-mounted DVR is uploaded to backup server about when having an accident with Video data in the surrounding time section that has an accident, and then is convenient to the acquisition of accident video data and the tracking to accident cause.Backup server is arranged at the place (the management commander unit of such as passenger company, public transport company) away from vehicle-mounted DVR, the Video data wirelessly such as 3G(3rd-generation of vehicle-mounted DVR, G mobile communication) network is uploaded to backup server, and the communication between vehicle-mounted DVR and backup server wirelessly such as 3G network is carried out.
In the vehicle-mounted DVR course of work, vehicle-mounted DVR records a video all the time, Video data in most of the time is normal Video data of driving a vehicle when not having accident to occur, the tracking that this part of Video data occurs for accident is useless, and the Video data that a period of time of front and back only occurs in accident needs to follow the trail of, the reason of accident can be got.Therefore, within the most of the time that vehicle-mounted DVR works, do not need Video data when normally driving does not have accident to occur to be uploaded to backup server, and be only uploaded to backup server by when having an accident with the Video data had an accident in a period of time of front and back.The benefit done like this, avoid on the one hand Video data and be uploaded to the pressure that 3G network brings in real time, save 3G network resource, save the capacity of backup server on the other hand, again on the one hand, the shorter Video data (when having an accident and the Video data had an accident in a period of time of front and back) being uploaded to backup server compared to longer Video data (record in the vehicle-mounted DVR course of work all comprise Video data when normal driving does not have accident to occur with when having an accident with the Video data had an accident in a period of time of front and back), more be convenient to checking of having an accident.
The implementation procedure being uploaded to backup server when having an accident with the Video data had an accident in a period of time of front and back is mainly contained two kinds of methods by vehicle-mounted DVR.
First method is, vehicle-mounted DVR is in video process, deposit the Video data in the first few minutes of middle buffering current time within it, when reporting to the police when having an accident, warning message is sent to backup server by 3G network by vehicle-mounted DVR, after backup server receives the warning message that vehicle-mounted DVR uploads, initiatively the Video data in a few minutes before being buffered in reporting to the police in its internal memory is obtained to vehicle-mounted DVR by 3G network, and after this section of Video data completes from vehicle-mounted DVR long pass to backup server, backup server continues through the real-time recording data that 3G network obtains vehicle-mounted DVR, a few minutes after terminating until report to the police.
Second method is, vehicle-mounted DVR is in video process, deposit the Video data in the first few minutes of middle buffering current time within it, when reporting to the police when having an accident, vehicle-mounted DVR initiatively uploads the real-time recording data of Video data in a few minutes before being buffered in reporting to the police in its internal memory and vehicle-mounted DVR to backup server by 3G network and is stored by backup server, until report to the police terminate position of rear a few minutes.
No matter be adopt above-mentioned first method or second method, all there will be identical problem:
1, the restriction of vehicle-mounted DVR memory source is subject to, Video data in the first few minutes of current time can not store a lot, and then when occurring to report to the police, there is the Video data of reporting to the police in the first few minutes in moment can not store a lot, and then cause inquiring the true cause had an accident in shorter Video data;
2, in the process uploaded by 3G network at Video data, if network interruption, then will there is the disappearance of partial data in the Video data before and after reporting to the police in a period of time.
Summary of the invention
In view of this, the invention provides a kind of method storing vehicle-mounted DVR warning video clip, to increase the Video data occurring to report to the police before the moment, and ensure vehicle-mounted DVR to backup server upload the complete of warning Video data.
The technical scheme of the application is achieved in that
Store a method for vehicle-mounted DVR warning video clip, comprising:
Pre-set the first time delay and the second time delay;
When there being accident free to occur, described vehicle-mounted DVR all keeps video state;
When accident alarming occurs, the video recording that the moment place of the first time delay before the generation moment of reporting to the police starts is changed to by common video recording video recording of reporting to the police by described vehicle-mounted DVR;
After accident alarming terminates, the video recording that the moment place of second time delay of described vehicle-mounted DVR after accident alarming terminates starts changes to common video recording by video recording of reporting to the police;
Backup server obtains from described vehicle-mounted DVR and stores described warning video recording.
Further, described backup server obtains and store alarms video recording from described vehicle-mounted DVR, for obtaining immediately after the second time delay moment after accident alarming terminates and store alarms video recording.
Further, described backup server obtains and store alarms video recording from described vehicle-mounted DVR, for regularly obtaining and store alarms video recording.
Further, described backup server from described vehicle-mounted DVR regularly obtain and store alarms video recording comprise:
Pre-set first time period;
Described backup server inquires about listed files in described first time period to described vehicle-mounted DVR, to obtain described warning video file information;
According to the described moment that starts to record a video, described warning video file is arranged according to time sequencing;
From the warning video file that last is recorded, described backup server obtains described warning video file successively from described vehicle-mounted DVR.
Further:
When described backup server obtains arbitrary warning video file from described vehicle-mounted DVR, described backup server first checks whether this locality has obtained this warning video file;
If described backup server did not obtain this warning video file, then obtained this warning video file;
If described backup server had obtained this warning video file, then checked that whether whether the size of local this warning video file obtained consistent with the file size recorded in the described warning video file information obtained from described vehicle-mounted DVR;
If inconsistent, then described backup server sends upload command with document misregistration amount to described vehicle-mounted DVR, and described vehicle-mounted DVR uploads this warning video file to described backup server from described document misregistration amount place;
If consistent, then described backup server continues to obtain next section warning video file from described vehicle-mounted DVR.
Further, described warning video information comprises warning video file name, file size and starts the moment of recording a video.
Further, described first time period is 1 hour ~ 1 day.
Further, described first time delay is 1 ~ 10 minute, and described second time delay is 1 ~ 10 minute.
Further, when accident free reports to the police generation, the type of described vehicle-mounted DVR video recording is common video recording.
Further, described backup server is obtained and store alarms video recording from described vehicle-mounted DVR by 3G network.
As can be seen from such scheme, compared with prior art, the method of storage of the present invention vehicle-mounted DVR warning video clip, the mode of the Video data interior for the previous period of vehicle-mounted DVR memory buffer current time is not adopted to carry out uploading of warning Video data, but when accident alarming occurs, the video recording that before there is the moment by reporting to the police, the moment place of the first time delay starts changes to by common video recording video recording of reporting to the police, after accident alarming terminates, the video recording that second time delay place of described vehicle-mounted DVR after accident alarming terminates starts changes to common video recording by warning video recording again, video record in a period of time in the moment of the second time delay after so just terminating to accident alarming from the moment of the first time delay before accident alarming occurs is in order to video recording of reporting to the police, when uploading to backup server, do not need to visit again the Video content cushioned in internal memory, but video recording of directly being reported to the police by this section directly carries out uploading, by the setting to the first time delay and the second time delay, the video time occurred before and after the warning moment can be extended, can ensure to record complete accident occurrence cause in this warning video recording.In addition, when described backup server obtains warning video file from described vehicle-mounted DVR, learn that whether obtained warning video file is complete by the comparison to warning video file information and local warning video file, and then by making vehicle-mounted DVR upload this warning video file to described backup server from document misregistration amount place with the upload command of document misregistration amount, and then achieve breakpoint transmission, ensure that complete the uploading at 3G network obstructed alarm Video data.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the method for storage of the present invention vehicle-mounted DVR warning video clip;
Fig. 2 is the flow embodiment schematic diagram of the inventive method.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, the method for storage of the present invention vehicle-mounted DVR warning video clip comprises:
Pre-set the first time delay and the second time delay;
When there being accident free to occur, described vehicle-mounted DVR all keeps video state;
When accident free reports to the police generation, the type of described vehicle-mounted DVR video recording is common video recording;
When accident alarming occurs, the video recording that the moment place of the first time delay before the generation moment of reporting to the police starts is changed to by common video recording video recording of reporting to the police by described vehicle-mounted DVR;
After accident alarming terminates, the video recording that the moment place of second time delay of described vehicle-mounted DVR after accident alarming terminates starts changes to common video recording by video recording of reporting to the police;
Backup server obtains from described vehicle-mounted DVR and stores described warning video recording.
Wherein, common video recording refers to: the video recording carrying out recording on a time period configured on vehicle-mounted DVR by user.During practical application, generally can be arranged to whole day video recording in 24 hours, also can be set to other times section as required, such as, be arranged on the video recording of 9:00 ~ 18:00,0:00 ~ 6:00,11:00 ~ 15:00,18:00 ~ 24:00 equal time section.
In the present invention, described warning video recording refers to: the first time delay moment of reporting to the police before occurring is to the video clip in the second time delay moment after terminating of reporting to the police.
In the present invention, video recording type comprises two kinds, i.e. common video recording and video recording of reporting to the police.For one section of video clip, or be common video recording, or be video recording of reporting to the police.
Wherein, in the present invention, described backup server obtains and store alarms video recording from described vehicle-mounted DVR, can adopt in two ways:
First kind of way: after the second time delay moment after accident alarming terminates, described backup server obtains and store alarms video recording immediately from described vehicle-mounted DVR, and this kind of mode can enable backup server obtain warning Video data for response, accident settlement are raced against time as early as possible in earliest time;
The second way: described backup server regularly obtains and store alarms video recording from described vehicle-mounted DVR, and this kind of mode achieves the concentrated of warning Video data and upload and manage.
The second way specifically comprises:
Pre-set first time period;
Described backup server inquires about listed files in described first time period to described vehicle-mounted DVR, to obtain described warning video file information;
According to the described moment that starts to record a video, described warning video file is arranged according to time sequencing;
From the warning video file that last is recorded, described backup server obtains described warning video file successively from described vehicle-mounted DVR.
The warning video file obtained from described vehicle-mounted DVR to prevent backup server imperfect, method of the present invention comprises further:
When described backup server obtains arbitrary warning video file from described vehicle-mounted DVR, described backup server first checks whether this locality has obtained this warning video file;
If described backup server did not obtain this warning video file, then obtained this warning video file;
If described backup server had obtained this warning video file, then checked that whether whether the size of local this warning video file obtained consistent with the file size recorded in the described warning video file information obtained from described vehicle-mounted DVR;
If inconsistent, then described backup server sends upload command with document misregistration amount to described vehicle-mounted DVR, and described vehicle-mounted DVR uploads this warning video file to described backup server from described document misregistration amount place;
If consistent, then described backup server continues to obtain next section warning video file from described vehicle-mounted DVR.
In the present invention, described warning video information comprises warning video file name, file size and starts the moment of recording a video.
When described backup server regularly obtains also store alarms video recording from described vehicle-mounted DVR, first time period can be set as required, such as 1 hour ~ 1 day, be 1 constantly little when arranging first time period, backup server just inquires about the listed files in 1 hour to vehicle-mounted DVR, be 1 day when arranging first time period, backup server just inquires about the listed files in 1 day to vehicle-mounted DVR.Those skilled in the art can content disclosed according to the present invention and according to reality driving monitoring need first time period is arranged, such as 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 12 hours, 18 hours, 1 day (24 hours) etc., also can arrange the time period beyond 1 hour ~ 1 day.
In order to the video recording of the most complete, comprehensive accident alarming can be obtained with the video record before and after the generation of acquisition accident, first time delay can be set to 1 ~ 10 minute, second time delay can be set to 1 ~ 10 minute, such as, first time delay can be set to 1 minute, 2 minutes, 3 minutes, 4 minutes, 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes, and the second time delay can be set to 1 minute, 2 minutes, 3 minutes, 4 minutes, 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes.When the time delay arranged is shorter, such as the first time delay is arranged on 1 ~ 5 minute, warning video file is not recorded in beyond critical event before may there is warning occurs in 5 minutes, so just, need the setup times of increase by first time delay, such as be arranged at 10 minutes, and for example the second time delay is arranged on 1 ~ 5 minute, the event handling result after terminating of reporting to the police may be there is occur in 5 minutes in addition and be not recorded in warning video file, so just, need the setup times of increase by second time delay, such as, be arranged at 10 minutes.Those skilled in the art can content disclosed according to the present invention and according to reality driving monitoring need the first time delay and the second time delay are arranged, also can be set to as required be greater than 10 minutes.
In the present invention, because vehicle-mounted DVR is installed on automobile with moving vehicle, and backup server is arranged at the place away from automobile, and be fixed on a place, the management commander unit of such as passenger company, public transport company, carries out communication and data transmission by 3G network between vehicle-mounted DVR and backup server.Said method of the present invention, can solve the instability of 3G network signal in vehicle traveling process and the problem of the warning video file fragment deletion brought.
Below in conjunction with Fig. 2, a specific embodiment of the method for the storage of inventing herein vehicle-mounted DVR warning video clip is described.
In the present embodiment, the first time delay and the second time delay are all set to 5 minutes, and first time period is set to 1 day.
The flow process of the present embodiment mainly comprises vehicle-mounted DVR flow process and backup server obtains warning video file flow process two parts from vehicle-mounted DVR.
Wherein, vehicle-mounted DVR flow process mainly comprises following content.
Steps A 1, vehicle-mounted DVR keep video state, and when not reporting to the police generation, the video recording type of vehicle-mounted DVR video recording is common video recording.
Steps A 2, vehicle-mounted DVR detect to report to the police and produce.
The video recording type of first 5 minute moment place's beginning of reporting to the police is changed to by common video recording video recording of reporting to the police by steps A 3, vehicle-mounted DVR.
Current video recording type of recording a video is set to video recording of reporting to the police by steps A 4, vehicle-mounted DVR.
Steps A 5, vehicle-mounted DVR detect to report to the police and terminate, and now vehicle-mounted DVR proceeds video recording, and type of recording a video still is video recording of reporting to the police.
Steps A 6, when the time arrive warning terminate after 5 minute moment place, vehicle-mounted DVR proceed video recording, the video recording Type Change that now can start is common video recording.
So far, vehicle-mounted DVR is the section of recorded warning video file just, and a warning video recording process of vehicle-mounted DVR terminates.
Backup server obtains warning video file flow process from vehicle-mounted DVR and mainly comprises following content.
Step B1, backup server inquire about the video file list in 1 day to vehicle-mounted DVR, wherein only inquire about the video file of video recording type of reporting to the police, i.e. an inquiry warning video file.
Step B2, vehicle-mounted DVR return the fileinfo of warning video file to backup server, fileinfo includes filename, file size, starts the moment etc. of recording a video.
Step B3, backup server judge whether the video file list obtained is empty, if be empty, then waits for that 10 seconds performed step B1 again, if be not empty, then performs step B4.
In this step B3, because always do not report to the police during running, so all may not report to the police within a very long time, video file produces, and backup server only inquires about the video file list about warning video file, so the video file list that institute's backup server obtains may for empty.In addition, in this step B3, wait for that the time in 10 seconds can be set to such as 5 seconds shorter time, also can be set to such as 20 seconds ~ 1 hour time etc. more grown.
Step B4, the file in the video file list inquired to be arranged according to video time order, before video time coming early, after the coming of video time evening, form listed files queue R, first warning video file be designated as r1, second warning video file be designated as r2 ..., last warning video file is designated as rn.
Step B5 to step B7 is that backup server obtains from last warning video file rn, after having obtained warning video file rn, obtain warning video file rn-1, until warning video file r1 obtains complete, particularly, can realize to the deterministic process in step B7 with crossing step B5.
Step B5, backup server obtain warning video file rn from vehicle-mounted DVR.
Step B6, n is updated to n-1, i.e. n=n-1.
Step B7, judges whether n is 0, if be 0, then performs step B1, otherwise performs step B5.
If former warning video file is 5 altogether, then after step B5, warning video file r5 has obtained complete, this alarm video file surplus 4 altogether, last warning video file is warning video file r4, after the judgement of step B7 subsequently, forward step B5 to, former warning video file rn, namely warning video file r5 has just become new warning video file rn, i.e. warning video file r4.
The another aspect of the setting of step B7 considers that can get back to step B1 after having obtained all warning video files continues to obtain the new warning video file that may occur.
Backup server obtains warning video file flow process from vehicle-mounted DVR and also comprises, in step B5, before each warning video file of acquisition:
Backup server first checks whether its this locality had obtained this warning video file;
If backup server did not obtain this warning video file, then obtained this warning video file;
If obtained, then whether the actual size of the local warning video file obtained of backup server inspection is consistent with the size of the warning video file recorded in the fileinfo that vehicle-mounted DVR returns;
If inconsistent, then backup server sends upload command with document misregistration amount to described vehicle-mounted DVR, and described vehicle-mounted DVR uploads this warning video file to described backup server from described document misregistration amount place;
If consistent, then the flow process of backup server execution step B6, step B7, step B5 is to continue to obtain next section warning video file from vehicle-mounted DVR.
The not of uniform size of warning video file of recording in the fileinfo that the actual size of the warning video file that backup server this locality obtains and vehicle-mounted DVR return causes, describe local current the recorded file of backup server and imperfect, incomplete reason may be the interrupted communication link because 3G network instability causes.Step in above-mentioned steps B5 achieves the breakpoint transmission of backup server from vehicle-mounted DVR obtains.
From above-mentioned steps B3, can find out, when not reporting to the police video file, the interval time that backup server inquires about the video file list in 1 day to vehicle-mounted DVR each time can arrange different durations as required.When set duration is shorter, such as be less than 1 minute, so for the new warning video file that the warning of produces, just can be backed up server in time of maximum 1 minute after its formation and know, and be uploaded in backup server in flow process subsequently.Can find out from here, the object that this duration also can realize immediately obtaining warning video file is reasonably set.
The method of above-mentioned storage of the present invention vehicle-mounted DVR warning video clip, the mode of the Video data interior for the previous period of vehicle-mounted DVR memory buffer current time is not adopted to carry out uploading of warning Video data, but when accident alarming occurs, the video recording that before there is the moment by reporting to the police, the moment place of the first time delay starts changes to by common video recording video recording of reporting to the police, after accident alarming terminates, the video recording that second time delay place of described vehicle-mounted DVR after accident alarming terminates starts changes to common video recording by warning video recording again, video record in a period of time in the moment of the second time delay after so just terminating to accident alarming from the moment of the first time delay before accident alarming occurs is in order to video recording of reporting to the police, when uploading to backup server, do not need to visit again the Video content cushioned in internal memory, but video recording of directly being reported to the police by this section directly carries out uploading, by the setting to the first time delay and the second time delay, the video recording occurred before the warning moment can be extended, can ensure to record complete accident occurrence cause in this warning video recording.In addition, when described backup server obtains warning video file from described vehicle-mounted DVR, learn that whether obtained warning video file is complete by the comparison to warning video file information and local warning video file, and then by making vehicle-mounted DVR upload this warning video file to described backup server from document misregistration amount place with the upload command of document misregistration amount, and then achieve breakpoint transmission, ensure that complete the uploading at 3G network obstructed alarm Video data.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. store a method for vehicle-mounted DVR warning video clip, comprising:
Pre-set the first time delay and the second time delay;
When there being accident free to occur, described vehicle-mounted DVR all keeps video state;
When accident alarming occurs, the video recording that the moment place of the first time delay before the generation moment of reporting to the police starts is changed to by common video recording video recording of reporting to the police by described vehicle-mounted DVR;
After accident alarming terminates, the video recording that the moment place of second time delay of described vehicle-mounted DVR after accident alarming terminates starts changes to common video recording by video recording of reporting to the police.
Backup server obtains from described vehicle-mounted DVR and stores described warning video recording.
2. the method for storage according to claim 1 vehicle-mounted DVR warning video clip, it is characterized in that: described backup server obtains and store alarms video recording from described vehicle-mounted DVR, for obtaining immediately after the second time delay moment after accident alarming terminates and store alarms video recording.
3. the method for storage according to claim 1 vehicle-mounted DVR warning video clip, is characterized in that: described backup server obtains and store alarms video recording from described vehicle-mounted DVR, for regularly obtaining and store alarms video recording.
4. the method for storage according to claim 3 vehicle-mounted DVR warning video clip, is characterized in that: described backup server regularly obtains also store alarms video recording from described vehicle-mounted DVR and comprises:
Pre-set first time period;
Described backup server inquires about listed files in described first time period to described vehicle-mounted DVR, to obtain described warning video file information;
According to the described moment that starts to record a video, described warning video file is arranged according to time sequencing;
From the warning video file that last is recorded, described backup server obtains described warning video file successively from described vehicle-mounted DVR.
5. the method for storage according to claim 4 vehicle-mounted DVR warning video clip, is characterized in that:
When described backup server obtains arbitrary warning video file from described vehicle-mounted DVR, described backup server first checks whether this locality has obtained this warning video file;
If described backup server did not obtain this warning video file, then obtained this warning video file;
If described backup server had obtained this warning video file, then checked that whether whether the size of local this warning video file obtained consistent with the file size recorded in the described warning video file information obtained from described vehicle-mounted DVR;
If inconsistent, then described backup server sends upload command with document misregistration amount to described vehicle-mounted DVR, and described vehicle-mounted DVR uploads this warning video file to described backup server from described document misregistration amount place;
If consistent, then described backup server continues to obtain next section warning video file from described vehicle-mounted DVR.
6. the method for storage according to claim 4 vehicle-mounted DVR warning video clip, is characterized in that: described warning video information comprises warning video file name, file size and starts the moment of recording a video.
7. the method for storage according to claim 4 vehicle-mounted DVR warning video clip, is characterized in that: described first time period is 1 hour ~ 1 day.
8. the method for storage according to claim 1 vehicle-mounted DVR warning video clip, is characterized in that:
Described first time delay is 1 ~ 10 minute, and described second time delay is 1 ~ 10 minute.
9. the method for storage according to claim 1 vehicle-mounted DVR warning video clip, is characterized in that:
When accident free reports to the police generation, the type of described vehicle-mounted DVR video recording is common video recording.
10. the method for the vehicle-mounted DVR warning of the storage according to any one of claim 1 to 9 video clip, is characterized in that: described backup server is obtained and store alarms video recording from described vehicle-mounted DVR by 3G network.
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| CN110225278A (en) * | 2019-06-25 | 2019-09-10 | 歌尔科技有限公司 | Acquisition methods, device and the equipment of multimedia file |
| CN111447473A (en) * | 2020-03-03 | 2020-07-24 | 深圳市天视通电子科技有限公司 | Alarm video processing method and system |
| CN112258778A (en) * | 2020-10-12 | 2021-01-22 | 南京云思创智信息科技有限公司 | Micro-expression real-time alarm video recording method |
| CN112752100A (en) * | 2020-12-28 | 2021-05-04 | 杭州海康威视系统技术有限公司 | Method and device for determining video integrity and readable storage medium |
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