CN114449336A - Vehicle track animation playing method, device and equipment - Google Patents
Vehicle track animation playing method, device and equipment Download PDFInfo
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- 238000009877 rendering Methods 0.000 claims abstract description 29
- 230000009469 supplementation Effects 0.000 claims abstract description 15
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- 230000001502 supplementing effect Effects 0.000 claims description 42
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T13/00—Animation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
- H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
- H04N21/4782—Web browsing, e.g. WebTV
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Abstract
The embodiment of the application discloses a method, a device and equipment for playing vehicle track animation. According to the method and the device, the vehicle running track information corresponding to the playing conditions is obtained, track point supplement is carried out on each track section according to the point supplement requirement, the vehicle running track composed of different track sections is obtained, when the vehicle running track is played, the video control is informed to play the video videos corresponding to the playing conditions through the web control, and the vehicle running track animation is played in the web browser through rendering the vehicle running track. In this embodiment, before playing the vehicle driving track animation, track point supplementation is performed on each track segment in advance, so that the jamming of the vehicle track animation playing caused by the loss of the driving track information of the vehicle is avoided.
Description
Technical Field
The present application relates to the field of computers, and in particular, to a method, an apparatus, and a device for playing an animation of a vehicle trajectory.
Background
In order to view the position of the vehicle on the map at a certain historical time and the video image shot by the camera device in the vehicle at the time at the same time to know the situation of the vehicle at the time, the driving track animation of the vehicle in a time period containing the certain historical time and the video shot by the camera device in the vehicle in the time period need to be played synchronously. The vehicle running track animation played in the related technology is obtained by obtaining time information corresponding to each frame of video image in the video, then obtaining position data of the vehicle corresponding to the time information on a map from a map server, and drawing the vehicle running track animation in the time period according to the obtained position data.
However, if the position data corresponding to the time information of a certain frame of video image in the video recording video is lost, this will cause the video recording video to normally play the frame of video image when the vehicle driving track animation and the video recording video are synchronously played, and the vehicle in the track animation will stay at the corresponding position of the previous frame of video image on the map, causing the playing of the track animation to be stuck.
Disclosure of Invention
The application discloses a method, a device and equipment for playing vehicle track animation, which are used for avoiding the situation that the vehicle track animation is played in a stuck state when vehicle running track information is lost.
According to a first aspect of the embodiments of the present application, there is provided a vehicle track animation playing method, which is applied to a web end, and includes:
obtaining vehicle running track information corresponding to playing conditions; the vehicle driving track information comprises at least one track segment; each track segment comprises at least one track point;
performing track point supplementation on each track segment according to the point supplementation requirement to obtain a vehicle running track consisting of different track segments;
when the video and the vehicle running track corresponding to the playing condition are triggered to start playing according to a playing instruction input from the outside and according to a preset playing requirement, playing a vehicle running track animation in a web browser by rendering the vehicle running track; the preset playing requirement is used for indicating that the video and the vehicle running track are played simultaneously.
Optionally, the obtaining of the vehicle travel track information corresponding to the playing condition includes:
sending a track request to a map server, wherein the track request carries playing conditions;
receiving vehicle running track information corresponding to the playing conditions returned by the map server;
or,
and searching the vehicle running track information corresponding to the playing condition from the stored vehicle running track information according to the playing condition.
Optionally, the vehicle driving track information further includes: the starting time and the ending time corresponding to each track segment;
the track point supplementation of each track segment according to the point supplementation requirement comprises the following steps:
for each track segment, determining the total number of track points needing to be supplemented in the track segment according to the starting time and the ending time of the track segment and a point supplementing algorithm specified by a point supplementing requirement;
and supplementing supplementary track points which correspond to the total number of the track points and are different from the existing track points in the track section according to the total number of the track points.
Optionally, the method further comprises:
when a vehicle driving track is rendered, if a refresh rate Fps detection event is detected currently, determining the current Fps of a currently rendered frame of animation image according to the rendering start time and the rendering end time of the currently rendered frame of animation image;
and adjusting the track points in the track segment to be rendered according to the current Fps.
Optionally, the adjusting the track point in the track segment to be rendered according to the current Fps includes:
if the current Fps is larger than the preset Fps, and the preset Fps corresponds to the point supplementing requirement, determining to add track points in the track segment to be rendered, wherein the number of the added track points is associated with the difference between the current Fps and the preset Fps;
and if the current Fps is smaller than the preset Fps, determining to reduce track points in the track segment to be rendered, wherein the reduced track points are related to the difference between the preset Fps and the current Fps.
Optionally, the method further comprises:
determining vehicle running time T according to the starting time and the current time for starting playing the vehicle running track;
and informing the vehicle running time T to a video control through a web control so that the video control adjusts the currently played video according to the vehicle running time T.
Optionally, the method further comprises:
obtaining a play progress control instruction input from the outside, wherein the play progress control instruction is used for indicating the video to fast forward, or rewind, or pause, or play normally, or skip to play;
and identifying the playing progress control instruction, and informing the video control through the web control so that the video control adjusts the currently played video according to the playing progress control instruction.
According to a second aspect of the embodiments of the present application, a vehicle track animation playing device, which is applied to a web side, includes:
the information acquisition unit is used for acquiring vehicle running track information corresponding to the playing conditions; the vehicle driving track information comprises at least one track segment; each track segment comprises at least one track point;
the track point supplementing unit is used for supplementing track points to all track sections according to the point supplementing requirements to obtain a vehicle running track consisting of different track sections;
the animation playing unit is used for playing the vehicle running track animation in a web browser by rendering the vehicle running track when the video and the vehicle running track corresponding to the playing condition are triggered to start playing according to a preset playing requirement according to an externally input playing instruction; the preset playing requirement is used for indicating that the vehicle running track and the video are played simultaneously.
Optionally, the obtaining, by the information obtaining unit, vehicle driving track information corresponding to the playing condition includes:
sending a track request to a map server, wherein the track request carries playing conditions;
receiving vehicle running track information corresponding to the playing conditions returned by the map server;
or,
searching vehicle running track information corresponding to the playing condition from the stored vehicle running track information according to the playing condition;
the vehicle travel track information further includes: the starting time and the ending time corresponding to each track segment;
the track point supplementing unit supplements track points of each track segment according to the point supplementing requirement, and comprises the following steps:
for each track segment, determining the total number of track points needing to be supplemented in the track segment according to the starting time and the ending time of the track segment and a point supplementing algorithm specified by a point supplementing requirement;
supplementing supplementary track points which correspond to the total number of the track points and are different from the existing track points in the track section according to the total number of the track points;
the apparatus further comprises:
the track point adjusting unit is used for determining the current Fps of the current rendered frame of animation image according to the rendering start time and the rendering end time of the current rendered frame of animation image when the refresh rate Fps detection event is detected currently when the vehicle driving track is rendered; according to the current Fps, track points in a track segment to be rendered are adjusted;
the video adjusting unit is used for determining the vehicle running time T according to the starting time for starting playing the vehicle running track and the current time; informing the vehicle running time T to a video control through a web control so that the video control adjusts the currently played video according to the vehicle running time T;
the track point adjusting unit adjusts the track points in the track segment to be rendered according to the current Fps, and the track point adjusting unit comprises:
if the current Fps is larger than the preset Fps, and the preset Fps corresponds to the point supplementing requirement, determining to add track points in the track segment to be rendered, wherein the number of the added track points is associated with the difference between the current Fps and the preset Fps;
if the current Fps is smaller than the preset Fps, determining to reduce track points in the track segment to be rendered, wherein the reduced track points are related to the difference between the preset Fps and the current Fps;
the recorded video adjustment unit is further configured to:
obtaining a play progress control instruction input from the outside, wherein the play progress control instruction is used for indicating the video to fast forward, or rewind, or pause, or play normally, or skip to play;
and identifying the playing progress control instruction, and informing the video control through the web control so that the video control adjusts the currently played video according to the playing progress control instruction.
According to a third aspect of embodiments of the present application, there is provided an electronic apparatus including: a processor and a memory;
the memory for storing machine executable instructions;
the processor is used for reading and executing the machine executable instructions stored in the memory so as to realize the vehicle track animation playing method.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the technical scheme, track point supplementation can be performed on each track section according to the point supplementation requirement by obtaining the vehicle running track information corresponding to the playing conditions, so that the vehicle running track composed of different track sections is obtained, when the vehicle running track is played, the video control is informed to play the video corresponding to the playing conditions through the web control, and the vehicle running track animation is played in the web browser through rendering the vehicle running track. In this embodiment, before playing the vehicle driving track animation, track point supplementation is performed on each track segment in advance, so that the jamming of the vehicle track animation playing caused by the loss of the driving track information of the vehicle is avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present specification and together with the description, serve to explain the principles of the specification.
Fig. 1 is a flowchart of a method for playing an animation of a vehicle track according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of adjusting trace points according to the current Fps according to the embodiment of the present application;
fig. 3 is a schematic view of an apparatus for playing an animation of a vehicle track according to an embodiment of the present disclosure;
fig. 4 is a hardware structure of an electronic device according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
In order to make the technical solutions provided in the embodiments of the present application better understood and make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions in the embodiments of the present application are described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a flowchart of a method for playing an animation of a vehicle track according to an embodiment of the present application. As an embodiment, the flow shown in fig. 1 may be applied to a web side, and this embodiment may be executed in a web browser, a web page embedded in a desktop application, and a browser embedded in a mobile side.
As an embodiment, in real life, there are some scenes in which a video image shot by an image pickup device (such as a tachograph) installed on a target vehicle within a certain time period and a track animation of the target vehicle within the time period need to be played simultaneously, for example, when the tachograph of the target vehicle shoots a track of a suspected object, when the video image shot by the tachograph of the target vehicle and containing the suspected object is obtained, it is further necessary to determine where the suspected object is shot by the target vehicle in order to determine the track of the suspected object, so when the video image collected by the target vehicle and containing the suspected object is played, a vehicle track animation corresponding to the target vehicle needs to be played simultaneously.
As shown in fig. 1, the process may include the following steps:
and step 101, obtaining vehicle running track information corresponding to the playing conditions.
As an embodiment, when it is determined that the vehicle driving track animation of the target vehicle in the specified time period and the video captured by the camera device in the target vehicle in the specified time period need to be played simultaneously, the identification information of the target vehicle (such as the license plate number of the target vehicle) and the specified time period may be determined as the playing condition.
In this embodiment, after the playback condition is determined, the vehicle travel track information corresponding to the playback condition may be obtained according to the playback condition. The vehicle running track information corresponding to the playing condition obtained in this embodiment may be obtained in a variety of ways:
as an embodiment, the vehicle driving track information corresponding to the playing condition returned by the map server may be received by sending a track request carrying the playing condition to the map server, and meanwhile, the recording video request carrying the playing condition may be sent to the recording server to receive the recording video corresponding to the playing condition returned by the recording server. The map server may be a server for storing vehicle positioning data in a satellite positioning system used when the vehicle positions itself in the driving process, or a server preset in this embodiment for storing vehicle positioning data downloaded from the satellite positioning system; the recording server may be a server provided by a manufacturer of the imaging apparatus installed in the vehicle for storing the recording video taken by the imaging apparatus, or a server provided in advance in the present embodiment for storing the recording video downloaded from the server provided by the manufacturer. The map server and the video server are only examples, and the map server and the video server are not limited in the present application.
Optionally, the map server and the video server in this embodiment may also be servers in a server cluster that is preset in this embodiment and used for storing data related to vehicle driving, and the map server and the video server may be different servers or the same server.
As another embodiment, when the vehicle driving track information and the video recording video are downloaded in advance and locally stored in the terminal to which the vehicle track animation playing method is applied, the vehicle driving track information corresponding to the playing condition may be searched from the stored vehicle driving track information directly according to the playing condition, and the video recording video corresponding to the playing condition may be searched from the stored video recording video. If the vehicle running track information corresponding to the playing condition and/or the video corresponding to the playing condition is not found locally, a track request carrying the playing condition may be further sent to the map server, and/or a video request carrying the playing condition may be sent to the video server, so as to obtain the vehicle running track information corresponding to the playing condition and the video corresponding to the playing condition by the method shown in the above embodiment.
In this embodiment of the present application, the vehicle driving track information corresponding to the obtained playing condition includes at least one track segment, and each track segment includes at least one track point. This is because in the present embodiment, when the satellite positioning system used when the vehicle locates its own position during traveling is operated, the position of the vehicle using the satellite positioning system is located according to the specified period T0 to obtain the vehicle traveling track information of the vehicle, and the data format of the vehicle traveling track information obtained by the satellite positioning system and stored in the map server is an array format, and when the map server records the vehicle traveling track information using the array format, the map server records in the form of track segments, and each track segment includes the position coordinates of the vehicle detected by the satellite positioning system at the beginning of one period and the position coordinates of the vehicle detected at the end of the period.
For example, if the period T0 for the satellite positioning system to position the vehicle is 5s, and if the time when one period of the satellite positioning system starts is X minutes X seconds, the position coordinates of the target vehicle at X minutes X seconds and the position coordinates of the target vehicle at X minutes (X +5) seconds are recorded in one track segment corresponding to the period in the map server. It should be noted that, because the satellite positioning system has a delay when positioning the vehicle, the track segments obtained by the satellite positioning system are not necessarily completely continuous, and if two adjacent track segments are not continuous, it indicates that the vehicle running track information between the discontinuous time segments is lost.
And 102, performing track point supplement on each track segment according to the point supplement requirement to obtain a vehicle running track consisting of different track segments.
In this embodiment, the vehicle driving track information in step 101 further includes a start time and an end time corresponding to each track segment, and for convenience of description, the start time of any track segment may be denoted as Tstart, and the end time of any track segment may be denoted as Tend. Based on the vehicle running track information, for each track segment, the total number of track points to be supplemented in the track segment can be determined according to the starting time and the ending time of the track segment and a point supplementing algorithm specified by a point supplementing requirement, and then supplementary track points which correspond to the total number of the track points and are different from the existing track points in the track segment are supplemented in the track segment according to the total number of the track points.
The point supplementing requirement is to supplement the number of the corresponding track points per second in each track segment to the frame number of the animation image which needs to be rendered per second (namely, the preset Fps) when a person visually feels that the animation is played smoothly.
For example, in this embodiment, the vehicle driving track information further includes a start coordinate corresponding to the start time and an end coordinate corresponding to the end time of each track segment, and for convenience of description, the start coordinate of any track segment may be denoted as Cstart, and the end coordinate of any track segment may be denoted as Cend, so that the following complementary point algorithm may be adopted in this embodiment:
for any track segment, assuming that when a person visually feels that the animation is played smoothly, the number of frames of an animation image to be rendered per second is α, the rendering time of each frame of animation image is 1000ms/α (ms is a millisecond unit), based on that the duration of one track segment is (Tend-Tstart), if the unit of (Tend-Tstart) is ms, the total number of track points to be supplemented in the track segment is (Tend-Tstart) ms/(1000ms/α).
Based on the embodiment that the track segment already includes Cstart and Cend track points, the number of supplementary track points to be supplemented in the track segment is (Tend-Tstart) ms/(1000ms/α) -2.
Further, after determining the number of supplementary track points, the supplementary track points can be supplemented on the track between Cstart and Cend according to Cstart and Cend, and the supplementary track points should be located between Cstart and Cend.
As to which positions between Cstart and Cend, for example, assuming that N supplementary track points need to be supplemented between Cstart and Cend, based on the existence of N supplementary track points between Cstart and Cend (excluding the two track points of Cstart and Cend), the track between Cstart and Cend will be divided into (N +1) segments, and if the length of the track between Cstart and Cend is (Cstart-Cend), then it can be determined that, in the vehicle travel track obtained by the supplementary track points, the length of the track between each two supplementary track points between Cstart and Cend is (Cstart-Cend)/(N +1), and the length of time between each two supplementary track points is (Tend-Tstart)/(N +1), then it can be determined that N supplementary track points to be supplemented can be determined according to the following formula: the position of the mth supplementary track point on the track formed by Cstart and Cend is Cstart + (Cstart-Cend)/(N +1) × M, the corresponding time is Tstart + (Tend-Tstart)/(N +1) × M, and M is an integer between 1 and N.
The above method for determining the supplementary track points is only an example, and in the embodiment of the present application, as long as the number of the supplementary track points between Cstart and Cend satisfies the requirement of Fps when a person visually feels the smoothness of the animation playing, the position of the supplementary track points is not limited in the present application, and the smoothness of the played vehicle driving track animation is not affected by the position of the supplementary track points.
After the track point supplementation is performed on each track segment, the driving track of the vehicle in the time period of the playing condition can be drawn on a map according to the track point corresponding to each track segment, and then a vehicle icon representing the vehicle is set to the starting point of the driving track to serve as the first frame animation image of the vehicle driving track animation.
103, when the video corresponding to the playing condition is triggered according to an externally input playing instruction and the vehicle running track starts to be played according to a preset playing requirement, playing a vehicle running track animation in a web browser by rendering the vehicle running track.
In this embodiment, the playing requirement preset in step 103 is used to instruct the video and the vehicle driving track to be played simultaneously. For example, when the vehicle running track starts to be played, the web control notifies the video control to play the video corresponding to the playing condition, or when the video control plays the video corresponding to the playing condition, the web control triggers to play the vehicle running track.
Based on the vehicle driving track composed of different track segments obtained through step 102, playing the vehicle driving track in this embodiment is to play the vehicle driving track animation in the web browser by rendering the vehicle driving track. The vehicle driving track animation in the embodiment is played while rendering, that is, animation image frames in the vehicle driving track animation in the embodiment are generated in real time according to track points.
In this embodiment, when the vehicle driving track animation is played, the video corresponding to the playing condition is also played synchronously through the video control, and the video in this embodiment is normally played according to the dynamic Fps of the screen of the device applied in this embodiment. The video control herein refers to a video control carried by the device applied in this embodiment, and the video control is used to adjust the playing of the video. Because the video and the vehicle running track animation are started to be played synchronously, and the duration of the vehicle running track is consistent with that of the video and is a time period required by the playing condition, the video and the vehicle running track animation can be played synchronously after the video and the vehicle running track animation are started to be played synchronously.
However, the video is played according to the real-time Fps of the screen of the playing device, and the vehicle driving track animation is rendered and played according to the preset Fps, so that the synchronization between the video and the vehicle driving track is interfered by the real-time Fps of the screen of the playing device. Preferably, in order to further ensure synchronization between the video frame and the vehicle driving track animation frame in the process of simultaneously playing the video and the vehicle driving track animation, based on that the video is played according to the dynamic Fps of the screen, the embodiment further provides a method for adjusting the playing of the vehicle driving track animation in real time according to the dynamic Fps of the screen:
referring to fig. 2, as shown in fig. 2, the method includes the following steps:
In step 201, the currently detected Fps detection event refers to the time for obtaining the function of the current Fps when a preset timing trigger is reached, or the function for obtaining the current Fps is detected to be triggered according to a period.
For example, the present embodiment may obtain a time required for rendering one frame of image by the current screen according to a rendering function Fnrender () in the related art, and determine a current Fps for rendering one frame of animation image according to the time required for rendering one frame of image by the current screen.
And step 202, adjusting track points in the track segment to be rendered according to the current Fps.
As an embodiment, if the current Fps is greater than the preset Fps, and the preset Fps corresponds to the point supplementing requirement, determining to add track points in the track segment to be rendered, wherein the number of the added track points is associated with the difference between the current Fps and the preset Fps; and if the current Fps is smaller than the preset Fps, determining to reduce the track points in the track segment to be rendered, wherein the reduced track points are related to the difference between the preset Fps and the current Fps.
For example, assuming that the preset Fps is α, that is, an α frame needs to be rendered every second, and detecting that the current Fps is β, if β is greater than α, the number m of trace points in the trace segment to be rendered and the positions of the trace points can be obtained (the trace points include a start coordinate and an end coordinate in the trace segment, and trace points supplemented according to the preset Fps before the vehicle driving trace animation is played), the number n of trace points corresponding to every second in the trace segment is calculated (the sum of the numbers n of the trace points corresponding to every second in the trace segment is m), and then point supplementation is performed on the trace points corresponding to every second, where the number k of the trace points needing to be added every second is (β -n).
In this embodiment, the total number of the added track points in the track segment to be rendered is (Tend-Tstart) ms × [1/(1000ms/β) -1/(1000ms/α) ]. Based on the total number, the present embodiment can directly increase the trace points randomly in the trace segment to be rendered according to the positions of the trace points, where the increased trace points are different from the trace points existing before.
And if the beta is smaller than the alpha, the number m of the track points in the track segment to be rendered and the positions of the track points (the track points comprise a start coordinate and an end coordinate in the track segment and the track points supplemented according to a preset Fps before the vehicle driving track animation is played) can be obtained, the number n of the track points corresponding to each second in the track segment is calculated, the sum of the number n of the track points corresponding to each second in the track segment is m, then the track points corresponding to each second are adjusted, and the number k of the track points needing to be deleted in each second is (n-beta).
In this embodiment, the total number of deleted track points in the track segment to be rendered is (Tend-Tstart) ms × 1/(1000ms/α) ] -1/(1000ms/β). Based on the total number, the embodiment may also randomly delete track points in the track segment to be rendered directly.
To this end, the procedure of adjusting the trace point according to the current Fps shown in fig. 2 is completed.
As an embodiment, while rendering the vehicle driving track, in this embodiment, the vehicle driving time T may be determined according to the starting time and the current time for starting playing the vehicle driving track, where the vehicle driving time T indicates the playing duration of the vehicle driving track animation, and this embodiment may notify the vehicle driving time T to the video control through the web control according to a preset period T1, so that the video control adjusts the currently played video according to the vehicle driving time T.
Optionally, in this embodiment, when the vehicle driving track animation starts to be played, the playing time length T of the initialized vehicle driving track animation is 0, and then each time one frame of animation image is played, the display time length of the animation image is superimposed to the vehicle driving time T.
As an embodiment, after the vehicle running time T is transmitted to the video control, the currently played video recording may be adjusted through the video control according to the vehicle running time T, for example, when it is detected that the vehicle running time T is greater than the playing time of the video recording, the playing time of the video recording is fast forwarded to the vehicle running time T, and if it is detected that the vehicle running time T is less than the playing time of the video recording, the playing time of the video recording is backed to the vehicle running time T, so that the playing states of the video recording and the vehicle track animation are synchronized.
Optionally, parameter data such as a playing Speed and a playing state (playing or playing pause) of the vehicle driving track animation may be transmitted to the video control, so that the video control adjusts the video.
Optionally, if an externally input play progress control instruction is obtained, where the play progress control instruction is used to instruct the video to fast forward, rewind, pause, normal play, or skip play, the play progress control instruction may be recognized and notified to the video control through the web control, so that the video control adjusts the currently played video according to the play progress control instruction.
Illustratively, if a user drags the playing progress bar to execute operations such as pause/play/double speed/fast forward/slow forward/rewind of the playing of the vehicle track animation, a playing progress control instruction is generated, the playing progress control instruction is identified, and then the video control is notified through the web control, so that the video control adjusts the currently played video according to the playing progress control instruction.
Thus, the flow shown in fig. 1 is completed.
As can be seen from the process shown in fig. 1, by obtaining the vehicle travel track information corresponding to the playing conditions, and performing track point supplementation on each track segment according to the point supplementation requirement, a vehicle travel track composed of different track segments is obtained, so that when the vehicle travel track starts to be played, the video control is notified through the web control to play the video corresponding to the playing conditions, and the vehicle travel track animation is played through the web browser by rendering the vehicle travel track. In this embodiment, before playing the vehicle driving track animation, track point supplementation is performed on each track segment in advance, so that the jamming of the vehicle track animation playing caused by the loss of the driving track information of the vehicle is avoided.
The above examples are merely for convenience of understanding, and the embodiments of the present application are not particularly limited.
It should be noted that, if the method embodiment is implemented by a browser Embedded in a mobile terminal and a web page Embedded in a desktop application, communication with a video control in the method embodiment may be through cef (interprocess communication), and if the method embodiment is implemented in a web browser, communication with a video control in the method embodiment may be through websocket long link communication. The above two communication methods are only examples, and the present application is not limited to how to communicate with the video control.
The above examples are merely for convenience of understanding, and the embodiments of the present application are not particularly limited.
The method provided by the embodiment of the application is described above. The following describes the apparatus provided in the embodiments of the present application:
referring to fig. 3, fig. 3 is a schematic diagram of an apparatus for implementing animation playing of a vehicle track according to an embodiment of the present application, where the apparatus is applied to a web end, and the apparatus includes:
an information obtaining unit 301, configured to obtain vehicle travel track information corresponding to a playing condition; the vehicle driving track information comprises at least one track segment; each track segment includes at least one track point.
And the track point supplementing unit 302 is used for supplementing track points to all track segments according to the point supplementing requirement to obtain the vehicle running track consisting of different track segments.
The animation playing unit 303 is configured to play a vehicle driving track animation in a web browser by rendering the vehicle driving track when a video and the vehicle driving track corresponding to the playing condition are triggered to start playing according to a preset playing requirement according to an externally input playing instruction; the preset playing requirement is used for indicating that the vehicle running track and the video are played simultaneously.
Optionally, the obtaining, by the information obtaining unit 301, vehicle driving track information corresponding to the playing condition includes:
sending a track request to a map server, wherein the track request carries playing conditions;
receiving vehicle running track information corresponding to the playing conditions returned by the map server;
or,
and searching the vehicle running track information corresponding to the playing condition from the stored vehicle running track information according to the playing condition.
Optionally, the vehicle driving track information further includes: the starting time and the ending time corresponding to each track segment;
the track point supplementing unit 302 performs track point supplementing on each track segment according to the point supplementing requirement, including:
for each track segment, determining the total number of track points needing to be supplemented in the track segment according to the starting time and the ending time of the track segment and a point supplementing algorithm specified by a point supplementing requirement;
and supplementing supplementary track points which correspond to the total number of the track points and are different from the existing track points in the track section according to the total number of the track points.
Optionally, the apparatus further includes a track point adjusting unit, configured to:
when a vehicle driving track is rendered, if a refresh rate Fps detection event is detected currently, determining the current Fps of a currently rendered frame of animation image according to the rendering start time and the rendering end time of the currently rendered frame of animation image;
and adjusting the track points in the track segment to be rendered according to the current Fps.
Optionally, the track point adjusting unit adjusts the track point in the track segment to be rendered according to the current Fps, including:
if the current Fps is larger than the preset Fps, and the preset Fps corresponds to the point supplementing requirement, determining to add track points in the track segment to be rendered, wherein the number of the added track points is associated with the difference between the current Fps and the preset Fps;
and if the current Fps is smaller than the preset Fps, determining to reduce track points in the track segment to be rendered, wherein the reduced track points are related to the difference between the preset Fps and the current Fps.
Optionally, the apparatus further includes a video adjusting unit, configured to:
determining vehicle running time T according to the starting time and the current time for starting playing the vehicle running track;
and informing the vehicle running time T to a video control through a web control so that the video control adjusts the currently played video according to the vehicle running time T.
Optionally, the video adjusting unit is further configured to:
obtaining a play progress control instruction input from the outside, wherein the play progress control instruction is used for indicating the video to fast forward, or rewind, or pause, or play normally, or skip to play;
and identifying the playing progress control instruction, and informing the video control through the web control so that the video control adjusts the currently played video according to the playing progress control instruction.
Correspondingly, an embodiment of the present application further provides a hardware structure diagram of an electronic device, and specifically, as shown in fig. 4, the electronic device may be a device implementing the method for playing the vehicle trajectory animation. As shown in fig. 4, the hardware structure includes: a processor and a memory.
Wherein the memory is to store machine executable instructions;
the processor is used for reading and executing the machine executable instructions stored in the memory so as to realize the corresponding vehicle track animation playing method embodiment shown above.
For one embodiment, the memory may be any electronic, magnetic, optical, or other physical storage device that may contain or store information such as executable instructions, data, and the like. For example, the memory may be: volatile memory, non-volatile memory, or similar storage media. In particular, the Memory may be a RAM (random Access Memory), a flash Memory, a storage drive (e.g., a hard disk drive), a solid state disk, any type of storage disk (e.g., an optical disk, a DVD, etc.), or similar storage medium, or a combination thereof.
So far, the description of the electronic apparatus shown in fig. 4 is completed.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (10)
1. A vehicle track animation playing method is applied to a web end and comprises the following steps:
obtaining vehicle running track information corresponding to playing conditions; the vehicle driving track information comprises at least one track segment; each track segment comprises at least one track point;
supplementing track points of each track segment according to the point supplementing requirements to obtain a vehicle running track consisting of different track segments;
when the video and the vehicle running track corresponding to the playing condition are triggered to start playing according to a playing instruction input from the outside and according to a preset playing requirement, playing a vehicle running track animation in a web browser by rendering the vehicle running track; the preset playing requirement is used for indicating that the video and the vehicle running track are played simultaneously.
2. The method according to claim 1, wherein the obtaining of the vehicle driving track information corresponding to the playing condition comprises:
sending a track request to a map server, wherein the track request carries playing conditions;
receiving vehicle running track information corresponding to the playing conditions returned by the map server;
or,
and searching the vehicle running track information corresponding to the playing condition from the stored vehicle running track information according to the playing condition.
3. The method of claim 1, wherein the vehicle travel track information further comprises: the starting time and the ending time corresponding to each track segment;
the track point supplementation of each track segment according to the point supplementation requirement comprises the following steps:
for each track segment, determining the total number of track points needing to be supplemented in the track segment according to the starting time and the ending time of the track segment and a point supplementing algorithm specified by a point supplementing requirement;
and supplementing supplementary track points which correspond to the total number of the track points and are different from the existing track points in the track section according to the total number of the track points.
4. A method according to any one of claims 1 to 3, characterized in that the method further comprises:
when a vehicle driving track is rendered, if a refresh rate Fps detection event is detected currently, determining the current Fps of a currently rendered frame of animation image according to the rendering start time and the rendering end time of the currently rendered frame of animation image;
and adjusting the track points in the track segment to be rendered according to the current Fps.
5. The method of claim 4, wherein adjusting the track points in the track segment to be rendered according to the current Fps comprises:
if the current Fps is larger than the preset Fps, and the preset Fps corresponds to the point supplementing requirement, determining to add track points in the track segment to be rendered, wherein the number of the added track points is associated with the difference between the current Fps and the preset Fps;
and if the current Fps is smaller than the preset Fps, determining to reduce track points in the track segment to be rendered, wherein the reduced track points are related to the difference between the preset Fps and the current Fps.
6. A method according to any one of claims 1 to 3, characterized in that the method further comprises:
determining vehicle running time T according to the starting time and the current time for starting playing the vehicle running track;
and informing the vehicle running time T to a video control through a web control so that the video control adjusts the currently played video according to the vehicle running time T.
7. A method according to any one of claims 1 to 3, characterized in that the method further comprises:
obtaining a play progress control instruction input from the outside, wherein the play progress control instruction is used for indicating the video to fast forward, or rewind, or pause, or play normally, or skip to play;
and identifying the playing progress control instruction, and informing the video control through the web control so that the video control adjusts the currently played video according to the playing progress control instruction.
8. A vehicle track animation playing device is applied to a web end and comprises:
the information acquisition unit is used for acquiring vehicle running track information corresponding to the playing conditions; the vehicle driving track information comprises at least one track segment; each track segment comprises at least one track point;
the track point supplementing unit is used for supplementing track points to all track sections according to the point supplementing requirements to obtain a vehicle running track consisting of different track sections;
the animation playing unit is used for playing the vehicle running track animation in a web browser by rendering the vehicle running track when the video and the vehicle running track corresponding to the playing condition are triggered to start playing according to a preset playing requirement according to an externally input playing instruction; the preset playing requirement is used for indicating that the vehicle running track and the video are played simultaneously.
9. The apparatus according to claim 8, wherein the information obtaining unit obtains the vehicle travel track information corresponding to the playback condition includes:
sending a track request to a map server, wherein the track request carries playing conditions;
receiving vehicle running track information corresponding to the playing conditions returned by the map server;
or,
searching vehicle running track information corresponding to the playing condition from the stored vehicle running track information according to the playing condition;
the vehicle travel track information further includes: the starting time and the ending time corresponding to each track segment;
the track point supplementing unit supplements track points of each track segment according to the point supplementing requirement, and comprises the following steps:
for each track segment, determining the total number of track points needing to be supplemented in the track segment according to the starting time and the ending time of the track segment and a point supplementing algorithm specified by a point supplementing requirement;
supplementing supplementary track points which correspond to the total number of the track points and are different from the existing track points in the track section according to the total number of the track points;
the apparatus further comprises:
the track point adjusting unit is used for determining the current Fps of the current rendered frame of animation image according to the rendering start time and the rendering end time of the current rendered frame of animation image when the refresh rate Fps detection event is detected currently when the vehicle driving track is rendered; according to the current Fps, track points in a track segment to be rendered are adjusted;
the video adjusting unit is used for determining the vehicle running time T according to the starting time for starting playing the vehicle running track and the current time; informing the vehicle running time T to a video control through a web control so that the video control adjusts the currently played video according to the vehicle running time T;
the track point adjusting unit adjusts the track points in the track segment to be rendered according to the current Fps, and the track point adjusting unit comprises:
if the current Fps is larger than the preset Fps, and the preset Fps corresponds to the point supplementing requirement, determining to add track points in the track segment to be rendered, wherein the number of the added track points is associated with the difference between the current Fps and the preset Fps;
if the current Fps is smaller than the preset Fps, determining to reduce track points in the track segment to be rendered, wherein the reduced track points are related to the difference between the preset Fps and the current Fps;
the recorded video adjustment unit is further configured to:
obtaining a play progress control instruction input from the outside, wherein the play progress control instruction is used for indicating the video to fast forward, or rewind, or pause, or play normally, or skip to play;
and identifying the playing progress control instruction, and informing the video control through the web control so that the video control adjusts the currently played video according to the playing progress control instruction.
10. An electronic device, comprising: a processor and a memory;
the memory for storing machine executable instructions;
the processor is configured to read and execute the machine executable instructions stored by the memory to implement the method of any one of claims 1 to 7.
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| CN202210067569.4A CN114449336B (en) | 2022-01-20 | 2022-01-20 | Vehicle track animation playing method, device and equipment |
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