JP2018173760A - Video recording device and video recording method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately record a video depending on a situation shown by an event that has occurred.SOLUTION: A video recording device according to an embodiment includes an imaging unit, an acquisition unit, a determination unit, a setting unit, and a recording unit. The imaging unit is mounted on a vehicle, and is provided so as to image a surrounding video of the vehicle. The acquisition unit acquires an occurence event for the vehicle. The determination unit determines a level of the occurence event acquired by the acquisition unit. The setting unit sets a recording system of the surrounding video depending on a level of the occurence event determined by the determination unit. The recording unit cuts out the surrounding video for a predetermined time including an occurence time of the occurence event, and records the surrounding video as the recording video according to the recording system set by the setting unit.SELECTED DRAWING: Figure 2

Description

  Embodiments disclosed herein relate to a video recording apparatus and a video recording method.

  2. Description of the Related Art Conventionally, a drive recorder is known that is mounted on a vehicle and records a surrounding image of the vehicle on a recording medium when a predetermined event occurs when the vehicle travels (see, for example, Patent Document 1).

  In the technique disclosed in Patent Document 1, the vehicle includes an acceleration sensor and a radar positioning unit, and the drive recorder calculates the acceleration output from the acceleration sensor exceeding a predetermined threshold or based on the output of the radar positioning unit. Video is recorded when the inter-vehicle distance behaves abnormally.

JP 2006-347493 A

  However, the above-described conventional technology has room for further improvement in recording video appropriately according to the situation indicated by the event that has occurred.

  Specifically, when the above-described conventional technology is used, the drive recorder cannot record an image unless there is a situation in which acceleration is actually detected, such as sudden braking or collision. In other words, when a minor danger that does not lead to sudden braking or collision occurs, no video is left.

  This point can be compensated by monitoring the behavior of the above-mentioned inter-vehicle distance. However, in the above-described conventional technology, the recorded video is handled uniformly regardless of the level of danger indicated by the situation. Not very convenient.

  One aspect of the embodiments has been made in view of the above, and an object thereof is to provide a video recording apparatus and a video recording method capable of appropriately recording a video according to a situation indicated by a generated event. To do.

  A video recording apparatus according to an aspect of an embodiment includes an imaging unit, an acquisition unit, a determination unit, a setting unit, and a recording unit. The imaging unit is mounted on a vehicle and is provided so as to be able to capture an image around the vehicle. The acquisition unit acquires an occurrence event for the vehicle. The determination unit determines a level of the occurrence event acquired by the acquisition unit. The setting unit sets a recording method of the surrounding video according to the level of the occurrence event determined by the determination unit. The recording unit records the surrounding video as a recording video for a predetermined time including the time of occurrence of the occurrence event by the recording method set by the setting unit.

  According to one aspect of the embodiment, video can be appropriately recorded according to the situation indicated by the event that has occurred.

FIG. 1A is a schematic explanatory diagram (part 1) of a video recording method according to an embodiment. FIG. 1B is a schematic explanatory diagram (part 2) of the video recording method according to the embodiment. FIG. 2 is a block diagram of the in-vehicle system according to the embodiment. FIG. 3 is a diagram illustrating a correspondence example between the danger signal level, the access right, and the necessity of notification to the external device. FIG. 4A is a diagram (part 1) illustrating an example of a recording range of video data. FIG. 4B is a second diagram illustrating an example of a recording range of video data. FIG. 5 is a flowchart illustrating a processing procedure executed by the drive recorder according to the embodiment.

  Hereinafter, embodiments of a video recording apparatus and a video recording method disclosed in the present application will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by embodiment shown below.

  In the following, an outline of the video recording method according to the present embodiment will be described with reference to FIGS. 1A and 1B, and then a drive recorder 10 (an example of “video recording device”) to which the video recording method according to the present embodiment is applied. Will be described with reference to FIGS.

  First, an outline of the video recording method according to the present embodiment will be described with reference to FIGS. 1A and 1B. 1A and 1B are schematic explanatory views (No. 1) and (No. 2) of the video recording method according to the present embodiment.

  As shown in FIG. 1A, the vehicle C includes an in-vehicle system 1. The in-vehicle system 1 includes a drive recorder 10 and a radar device 20. The drive recorder 10 and the radar apparatus 20 are connected to each other via a network N1 such as a CAN (Controller Area Network) so that they can communicate with each other.

  The drive recorder 10 is provided in the vicinity of the rearview mirror of the windshield so that the front of the vehicle C can be imaged, for example. Further, when a predetermined event occurs for the vehicle C, the drive recorder 10 cuts out a front image of the vehicle C for a predetermined time including the time when the event occurs, and stores it in a storage medium as a recorded image.

  The radar device 20 is, for example, a millimeter wave radar, sends a millimeter wave toward the front of the vehicle C, for example, receives a reflected wave that hits the target, and analyzes the received signal to analyze the target. Calculate heading, relative speed and distance.

  The radar device 20 is provided so as to be able to determine the possibility of the target colliding with the vehicle C based on the azimuth, relative speed, and distance.

  Moreover, the radar apparatus 20 can transmit a danger signal to the exterior, when it determines with the possibility of a collision. Further, the radar apparatus 20 can generate different types of danger signals according to the degree of collision possibility, that is, depending on the degree of danger.

  By the way, in the prior art, the drive recorder 10 detects a predetermined event when, for example, an acceleration sensor (not shown) detects an acceleration exceeding a predetermined threshold or when the calculated distance to the target shows an abnormal behavior. The video was recorded as having occurred.

  However, the video is treated uniformly regardless of the level of danger, and for example, the access right is controlled in the same way. For this reason, for example, a recorded video with a higher level of danger, which is considered to be highly useful data for machine learning such as accident verification or automatic driving, corresponds to a newly generated event with a low level of danger. May be overwritten by.

  Therefore, in the video recording method according to the present embodiment, the drive recorder 10 acquires the danger signal transmitted from the radar apparatus 20 and sets the importance of the recorded video according to the danger level indicated by the danger signal. It was. The importance level is set, for example, by controlling the access right of the recorded video.

  Specifically, as shown in FIG. 1A, in the video recording method according to the present embodiment, the radar device 20 first senses danger (step S1). That is, the radar apparatus 20 determines the possibility of collision of the target based on the reflected wave from the target existing in front of the vehicle C, and when there is such a possibility of collision, the radar apparatus 20 responds to the degree of possibility of collision. A danger signal is generated and sent to the network N1.

  Then, the drive recorder 10 acquires a danger signal from the radar apparatus 20 (step S2). Then, the drive recorder 10 determines the risk level indicated by the acquired danger signal, and changes the video recording method according to the risk level (step S3). Specifically, the access right of the recorded video is controlled according to the degree of risk. A more specific example will be described later with reference to FIG.

  Further, the drive recorder 10 not only controls the access right of the recorded video, but also records information including the recorded video as needed to the external device 101 provided in the information center 100 or the like via the wide area network N2, for example. Notification is made (step S4). The target of notification is, for example, recorded information including a recorded video that is considered to have high utility value as described above.

  In the video recording method according to the present embodiment, as shown in FIG. 1B, the level of the danger signal is assumed to be three levels “1” to “3”. The risk level is assumed to increase from “low” to “high” as the level of the danger signal increases from “1” to “3”.

  Also, based on these assumptions, in the video recording method according to the present embodiment, the access right of the recorded video is controlled so that the protection priority of the recorded video is changed from “low” to “high” as the risk increases. To do. Further, as the degree of danger increases, the recorded video is handled so that the necessity of notification to the external apparatus 101 is changed from “low” to “high”.

  Thereby, according to the video recording method according to the present embodiment, video can be appropriately recorded in accordance with the situation indicated by the event generated for the vehicle C. That is, it is possible to prevent a recorded video having a high utility value from being overwritten by a recorded video having a relatively low utility value.

  Also, since the record information with high utility value is notified to the external device 101, the data with high utility value can be made into a database in the external device 101, and this can be used as, for example, machine learning data related to automatic driving control. It can be used as educational material for training for risk prediction.

  Note that the video recording method according to the present embodiment can be applied with the magnitude of acceleration obtained from an unillustrated acceleration sensor corresponding to the level of the danger signal described above. That is, the acceleration detected by the acceleration sensor may be acquired as an event, the access right of the recorded video may be controlled according to the magnitude of the acceleration, or the recording information may be notified to the external device 101 as necessary.

  Accordingly, it is possible to cover a variety of events that occur with respect to the vehicle C and appropriately record a video according to the situation indicated by the various events.

  Hereinafter, the drive recorder 10 to which the above-described video recording method is applied and the in-vehicle system 1 including the drive recorder 10 will be described more specifically.

  FIG. 2 is a block diagram of the in-vehicle system 1 according to the present embodiment. In FIG. 2, only components necessary for explaining the features of the present embodiment are represented by functional blocks, and descriptions of general components are omitted.

  In other words, each component illustrated in FIG. 2 is functionally conceptual and does not necessarily need to be physically configured as illustrated. For example, the specific form of distribution / integration of each functional block is not limited to the one shown in the figure, and all or a part thereof is functionally or physically distributed in arbitrary units according to various loads or usage conditions.・ It can be integrated and configured.

  As shown in FIG. 2, the in-vehicle system 1 includes a drive recorder 10, a radar device 20, a vehicle control device 30, and an acceleration sensor 40. First, the radar device 20 will be described.

  The radar apparatus 20 includes an antenna 21 and a control unit 22. The control unit 22 is, for example, a CPU (Central Processing Unit) and includes a danger sensing unit 22a.

  Although partially overlapping with the description using FIG. 1A, the radar device 20 is, for example, a millimeter wave radar, which transmits a millimeter wave from the antenna 21 toward the front of the vehicle C, for example, and is a reflected wave that hits a target. Is received by the antenna 21.

  The danger sensing unit 22a calculates the azimuth, relative speed, and distance of the target by analyzing the received signal received by the antenna 21. Further, the danger sensing unit 22a determines the possibility of the target colliding with the vehicle C based on the calculated azimuth, relative speed, and distance.

  Further, when it is determined that there is a possibility of a collision, the danger sensing unit 22a generates a danger signal of levels “1” to “3” according to the level of danger, and sends it to the drive recorder 10 and the vehicle control device 30. Send.

  The level “1” (corresponding to an example of “first risk”) indicates a level that requires a warning. Level “2” (corresponding to an example of “second risk level”) indicates a level that requires gentle braking. Level “3” (corresponding to an example of “third risk level”) indicates a level that requires sudden braking.

  The vehicle control device 30 controls the brake 31 and the pretensioner 32 mounted on the vehicle C based on the danger signal from the radar device 20.

  The drive recorder 10 includes a camera 11, a control unit 12, and a storage unit 13. The camera 11 corresponds to an example of an “imaging unit”. The control unit 12 is a CPU, for example, and controls the entire drive recorder 10. The storage unit 13 is a storage medium, for example, a flash memory. The storage unit 13 stores a recorded video group 13a.

  The control unit 12 includes an acquisition unit 12a, a level determination unit 12b, a recording method setting unit 12c, a video recording unit 12d, and a notification unit 12e.

  The acquisition unit 12a acquires a danger signal from the danger detection unit 22a of the radar apparatus 20, and passes the danger signal to the level determination unit 12b. The acquisition unit 12a can also acquire the acceleration output by the acceleration sensor 40. This point will be described later.

  The level determination unit 12b determines the level of the danger signal acquired by the acquisition unit 12a, that is, the risk level. In addition, the level determination unit 12b passes the determined determination result to the recording method setting unit 12c and the notification unit 12e.

  The recording method setting unit 12c sets the recording method of the recorded video according to the level of the danger signal determined by the level determining unit 12b, and specifically controls the access right of the recorded video.

  The video recording unit 12d cuts out the captured video of the camera 11 for a predetermined time including the time when the danger signal is acquired, and records it as a recorded video in the recorded video group 13a by the recording method set by the recording method setting unit 12c.

  The notification unit 12e reads out the corresponding recorded video from the recorded video group 13a according to the level of the danger signal determined by the level determination unit 12b, includes the recorded video in the recorded information, and notifies the external device 101 of the recorded information. Note that the record information may include detection information (for example, information related to other vehicles in the vicinity, obstacles, and the like) of the radar apparatus 20 corresponding to the corresponding record information.

  Here, the video recording process in the drive recorder 10 will be described more specifically with reference to FIGS. FIG. 3 is a diagram illustrating a correspondence example between the danger signal level, the access right, and the necessity of notification to the external apparatus 101. 4A and 4B are diagrams (part 1) and (part 2) illustrating an example of a recording range of video data.

  As shown in FIG. 3, for example, the recording method setting unit 12c controls the access right of the recorded video so that all the readings are “permitted” regardless of the level of the danger signal. Although not shown here, for example, if the level of the danger signal is high, that is, the degree of importance is high, for example, a recorded video of level “3” is read only by a certifier who has passed a specific authentication. The access right may be controlled to be “permitted”. Thereby, it is possible to prevent a situation in which a recorded video with high importance is viewed by anyone.

  Also, as shown in FIG. 3, the recording method setting unit 12c controls the access right so that overwriting is impossible for the recorded video of level “3”. Accordingly, it is possible to prevent the recorded video of level “3” from being overwritten by the recorded video of level “1” or “2” having a relatively low risk.

  Further, the recording method setting unit 12c controls the access right so that, for example, the recorded video of level “1” or “2” can be overwritten. However, as shown in the overwrite priority order “1” and “2” in the figure, when recording a new recording video, the recording video of level “1” has priority over the recording video of level “2”. The access right can be controlled to be overwritten.

  As a result, it is possible to increase the possibility that a relatively high-risk recorded video remains without being erased even if the recorded video has the same overwrite “possible”.

  Also, as shown in FIG. 3, for example, the notification unit 12e determines that notification to the external apparatus 101 is necessary only for the recorded video at level “3”, and the recorded video at level “3” and the related video. Record information including detection information of the radar device 20 is notified to the external device 101.

  The example shown in FIG. 3 is merely an example. For example, the access right of the recorded video may be controlled so that overwriting is “impossible” except for the level “1” of the danger signal. Any recording information may be notified to the external apparatus 101 regardless of the level.

  As shown in FIG. 4A, the video recording unit 12d cuts out from the video data of the camera 11 using, for example, ± n seconds (for example, about several seconds) as a recording range based on the time t1 at the time of acquiring the danger signal. Record the range as recorded video.

  As a modification, as shown in FIG. 4B, the recording range may be different depending on the level of the danger signal. For example, as shown in FIG. 4B, the recorded video may be recorded such that the higher the danger signal level, the larger the recording range.

  As a result, it is possible to analyze the recorded video with a relatively high degree of danger in detail, which can contribute to, for example, investigation of the cause of a dangerous situation.

  Returning to the description of FIG. By the way, although it has already been described that the acquisition unit 12a can acquire the acceleration from the acceleration sensor 40, in such a case, the level determination unit 12b determines the level of the risk according to the magnitude of the acquired acceleration. Can be determined.

  For example, if the level determination unit 12b determines the level in three stages according to the magnitude of the acceleration, the same video recording process and notification process to the external apparatus 101 as those based on the danger signal from the radar apparatus 20 described above. Can be done. Of course, the determination level may be different between the case of a danger signal and the case of acceleration.

  Next, a processing procedure executed by the drive recorder 10 according to the present embodiment will be described with reference to FIG. FIG. 5 is a flowchart showing a processing procedure executed by the drive recorder 10. FIG. 5 shows a case based on a danger signal from the radar apparatus 20.

  As shown in FIG. 5, the camera 11 captures an image (step S101). Moreover, the control part 12 determines whether the danger signal was acquired from the radar apparatus 20 by the acquisition part 12a (step S102).

  Here, when the danger signal is acquired (step S102, Yes), the level determination unit 12b determines the level of the danger signal, that is, the degree of danger (step S103). In addition, when the danger signal is not acquired (step S102, No), control is moved to step S108.

  After the level determination unit 12b determines the level, the recording method setting unit 12c sets the recording method according to the level (step S104). Then, the video recording unit 12d records the video with the recording method set by the recording method setting unit 12c (step S105).

  Then, the notification unit 12e determines whether or not notification to the external device 101 is necessary based on the level determined by the level determination unit 12b (step S106). Here, when the notification to the external apparatus 101 is necessary (step S106, Yes), the notification unit 12e notifies the external apparatus 101 of the record information including the recorded video (step S107). If notification to the external device 101 is not required (No at Step S106), the control is moved to Step S108.

  Then, the control unit 12 determines whether or not the process is finished (step S108). The end of the process is determined by whether or not an event has occurred, for example, the ignition switch is turned off.

  If the process is not finished (No at Step S108), the process from Step S101 is repeated. When it is the process end (step S108, Yes), the drive recorder 10 ends the process.

  As described above, the drive recorder 10 (corresponding to an example of “video recording device”) according to the present embodiment includes the camera 11 (corresponding to an example of “imaging unit”), the acquisition unit 12a, and the level determination unit 12b. (Corresponding to an example of “determination unit”), a recording method setting unit 12c (corresponding to an example of “setting unit”), and a video recording unit 12d (corresponding to an example of “recording unit”).

  The camera 11 is mounted on the vehicle C and is provided so as to be able to capture an image around the vehicle C. The acquisition unit 12a acquires an occurrence event (corresponding to an example of “occurrence event”) for the vehicle C. The level determination unit 12b determines the level of the occurrence event acquired by the acquisition unit 12a.

  The recording method setting unit 12c sets the recording method of the surrounding video according to the level of the occurrence event determined by the level determination unit 12b. The video recording unit 12d records the surrounding video as a recorded video for a predetermined time including the time of occurrence of the occurrence event by the recording method set by the recording method setting unit 12c.

  Therefore, according to the drive recorder 10 according to the present embodiment, video can be appropriately recorded according to the situation indicated by the generated event.

  The acquisition unit 12a is transmitted from a radar device 20 that is mounted on the vehicle C and provided so as to be able to determine the possibility of collision of the target based on the reflected wave from the target existing around the vehicle C. Get a warning signal as an occurrence event. Further, the level determination unit 12b determines the risk level indicated by the danger signal based on the danger signal acquired by the acquisition unit 12a. The recording method setting unit 12c sets the importance of the recorded video according to the degree of risk determined by the level determination unit 12b. Specifically, for example, the importance is set by controlling the access right of the recorded video.

  Therefore, according to the drive recorder 10 according to the present embodiment, even if no acceleration is detected by the acceleration sensor 40, that is, even when no impact or vibration is generated on the vehicle C, the danger signal from the radar device 20 is generated. Based on this, it is possible to leave a recorded video corresponding to the degree of danger.

  Further, the recording method setting unit 12c controls the access right so that the protection priority of the recorded video increases as the degree of risk increases. Therefore, according to the drive recorder 10 according to the present embodiment, it is possible to protect a recorded video having a relatively high degree of danger compared to a recorded picture having a low degree of danger. That is, it is possible to protect the recorded video with higher utility value.

  In addition, the level determination unit 12b increases the level “1” (corresponding to an example of “first risk level”) and the level “2” (an example of “second risk level”) from the lowest risk level to the higher risk level. And level “3” (corresponding to an example of “third risk”). The recording method setting unit 12c controls the access right so that the recorded video is overwritten when the level determination unit 12b determines the level “3”.

  Therefore, according to the drive recorder 10 according to the present embodiment, it is possible to reliably protect the recorded video corresponding to the event with the highest degree of danger among the three stages.

  The recording method setting unit 12c controls the access right so that the recorded video can be overwritten when the level determination unit 12b determines the level “1” or the level “2”, and the level “2”. The access right is controlled so that the recorded video of the level “1” is overwritten preferentially over the recorded video of.

  Therefore, according to the drive recorder 10 according to the present embodiment, it is possible to increase the possibility that the recorded video with a relatively high degree of risk remains without being erased even if the recorded video has the same overwrite “possible”. it can.

  The drive recorder 10 further includes a notification unit 12e. When the level “3” is determined by the level determination unit 12 b, the notification unit 12 e notifies the external apparatus 101 of the recording information including the recording video of the level “3”.

  Therefore, according to the drive recorder 10 according to the present embodiment, data having high utility value can be shared other than the vehicle C. For example, it can be used as machine learning data related to automatic driving control, or as educational material related to danger prediction training.

  The recorded information includes detection information of the radar apparatus 20 corresponding to the recorded video of level “3”. Therefore, according to the drive recorder 10 according to the present embodiment, for example, when used as an educational material related to training for predicting danger, data with higher accuracy can be provided.

  In the above-described embodiment, the case where the drive recorder 10 images the front of the vehicle C is taken as an example. However, the drive recorder 10 may be around the vehicle C, and may be behind, for example. Note that the radar device 20 is preferably arranged so that the positioning direction at least partially overlaps the imaging direction of the drive recorder 10.

  In the above-described embodiment, the risk level is described as three levels, but of course, the level level is not limited.

  In the above-described embodiment, the case where the priority order is provided when overwriting is “permitted” has been described. However, if the priority is based on the magnitude of the acceleration of the acceleration sensor 40, is it possible to overwrite without providing the priority order? It is also possible to perform binary access right control of “No”.

  This is a case where a physical shock or vibration is actually generated in the vehicle C when the acceleration sensor 40 obtains an acceleration equal to or greater than a predetermined threshold, and is relatively more than the case based on the danger signal of the radar device 20. This is because the danger is considered high. For this reason, a certain degree of risk can be estimated even by roughly classifying whether overwriting is possible or not. Instead, in the case of being based on a danger signal, the priority order in which overwriting of recorded video is “permitted” may be further divided.

  As described above, the control of the access right is different between the case based on the danger signal and the case based on the acceleration, thereby covering the variety of events that occur to the vehicle C, and the situation indicated by such various events. The video can be appropriately recorded accordingly.

  Further effects and modifications can be easily derived by those skilled in the art. Thus, the broader aspects of the present invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications can be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

DESCRIPTION OF SYMBOLS 1 In-vehicle system 10 Drive recorder 11 Camera 12a Acquisition part 12b Level determination part 12c Recording system setting part 12d Video recording part 12e Notification part 13 Storage part 13a Recorded video group 20 Radar apparatus 30 Vehicle control apparatus 40 Acceleration sensor 101 External apparatus C Vehicle

Claims (10)

An imaging unit mounted on a vehicle and provided so as to be capable of capturing an image around the vehicle;
An acquisition unit for acquiring an occurrence event for the vehicle;
A determination unit for determining a level of the occurrence event acquired by the acquisition unit;
A setting unit that sets the recording method of the surrounding video according to the level of the occurrence event determined by the determination unit;
A video recording apparatus comprising: a recording unit configured to record the surrounding video as a recorded video by the recording method set by the setting unit for a predetermined time including the occurrence of the occurrence event. The acquisition unit
A danger signal transmitted from a radar device mounted on the vehicle and provided so that the possibility of collision of the target can be determined based on a reflected wave from the target existing around the vehicle is acquired as the occurrence event. And
The determination unit
Determining the degree of danger indicated by the danger signal based on the danger signal obtained by the obtaining unit;
The setting unit
The video recording apparatus according to claim 1, wherein the importance level of the recorded video is set according to the degree of risk determined by the determination unit. The setting unit
The video recording apparatus according to claim 2, wherein the importance is set by controlling an access right of the recorded video according to the degree of risk determined by the determination unit. The setting unit
The video recording apparatus according to claim 3, wherein the access right is controlled such that the protection priority of the recorded video increases as the risk increases. The determination unit
The first risk level, the second risk level, and the third risk level are determined in order from the lowest risk level to the higher risk level,
The setting unit
5. The video recording apparatus according to claim 3, wherein, when the third risk is determined by the determination unit, the access right is controlled so that the recorded video is overwritten. 5. The setting unit
When the determination unit determines the first risk level or the second risk level, the access right is controlled so that the recorded video can be overwritten, and from the recorded video of the second risk level. The video recording apparatus according to claim 5, wherein the access right is controlled so that the recorded video of the first risk is overwritten preferentially. 7. The information processing apparatus according to claim 5, further comprising: a notification unit configured to notify an external device of recording information including the recording video of the third risk when the third risk is determined by the determination unit. The video recording apparatus described in 1. The recorded information is
The video recording apparatus according to claim 7, comprising detection information of the radar apparatus corresponding to the recorded video of the third risk. The vehicle has an acceleration sensor,
The acquisition unit
Obtaining acceleration from the acceleration sensor as the occurrence event,
The setting unit
When the acceleration is acquired by the acquisition unit, the access right is controlled so that the recorded video can be overwritten or prohibited from being overwritten in accordance with the degree of danger indicated by the acceleration. The video recording apparatus according to any one of claims 3 to 8, wherein a priority order in some cases is not provided. A video recording method using a video recording device that is mounted on a vehicle and includes an imaging unit provided so as to be capable of imaging a surrounding video of the vehicle,
An acquisition step of acquiring an occurrence event for the vehicle;
A determination step of determining a level of the occurrence event acquired by the acquisition step;
A setting step of setting the recording method of the surrounding video according to the level of the occurrence event determined by the determination step;
A recording step of recording the surrounding image as a recording image by the recording method set by the setting step for a predetermined time including the occurrence of the occurrence event.

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