CN105208245A - Video-content-based multi-channel video synchronization method and device - Google Patents
Video-content-based multi-channel video synchronization method and device Download PDFInfo
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- CN105208245A CN105208245A CN201510677733.3A CN201510677733A CN105208245A CN 105208245 A CN105208245 A CN 105208245A CN 201510677733 A CN201510677733 A CN 201510677733A CN 105208245 A CN105208245 A CN 105208245A
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Abstract
The invention provides a video-content-based multi-channel video synchronization method and device. The video-content-based multi-channel video synchronization method comprises the following steps: (1) starting up a plurality of video recording devices for shooting; (2) when the video recording devices are all in the shooting process, adding a synchronization event, and enabling all the video recording devices to record the synchronization even so as to obtain multiple video signals, wherein the video content of each video signal comprises the synchronization event; (3) after shooting, analyzing and extracting the synchronization event recorded in the video content of each video signal to obtain timestamp information of the synchronization event in each video signal; (4) synchronizing the multiple video signals according to the timestamp information of the synchronization event in each video signal. Compared with the prior art, the video-content-based multi-channel video synchronization method is simple and convenient to operate and lower in cost. The invention further provides a device including a plurality of video recording equipment and a plurality of synchronous flashlights, and the device is smart in structural design and suitable for shooting and synchronization of multi-channel video.
Description
Technical field
The present invention relates to multi-channel video synchronous method and device, especially based on multi-channel video synchronous method and the device of video content.
Background technology
At present, panoramic video makes generally is all be spliced by multi-channel video.But, due to multi-channel video respectively the shooting of multiple video recording device obtain, multiple video recording device enters shooting process and can not realize strict synchronous after pressing the button starting and start to take at the same time, cause between multi-channel video signal, there is the regular hour poor, the time difference of normally several frame.This time difference will cause the synchronous error of multi-channel video, produces the defects such as image blurring, motion ghost, finally cannot obtain panoramic video very clearly in follow-up video-splicing.
In prior art, in order to solve the synchronous problem of multi-channel video, be typically employed in multi-channel video signal the mode embedding synchronizing signal, display end controls multi-channel video simultaneous display according to the synchronizing signal in the vision signal of every road again.But the prerequisite of adopting in this way, be need to pre-set one for the module that embeds specific synchronizing signal in the vision signal of every road and the module extracted for display end the synchronizing signal in multi-channel video signal and mate, synchronizing process is complicated and equipment cost is higher.Therefore, how adopting simpler and easy and mode that is low cost to realize is synchronously this area technical problem urgently to be resolved hurrily to multi-channel video.
Summary of the invention
In order to solve the problem, the object of this invention is to provide a kind of multi-channel video synchronous method based on video content and device, to solve nonsynchronous problem when multi-channel video in prior art is spliced into panoramic video.
In order to achieve the above object, first object of the present invention provides a kind of distant view photograph synthetic method based on mobile phone front camera and rear camera, it is characterized in that, comprises the following steps:
Based on a multi-channel video synchronous method for video content, it is characterized in that, comprise the following steps:
1. open multiple video recording device to take;
2. when multiple described video recording device is all in shooting process, add a synchronous event, make each described video recording device record described synchronous event, obtain multi-channel video signal, in the video content of vision signal described in each road, all comprise described synchronous event;
3., after shooting terminates, analyze and extract described synchronous event described in the video content of vision signal described in each road, obtaining the timestamp information of synchronous event described in vision signal described in each road;
The timestamp information of the described synchronous event 4. in vision signal according to each road carries out synchronously vision signal described in multichannel.
In implementation process, synchronous event can select various ways, such as, as long as can be recorded in each road video and to produce a specific video content, one section of sound, one section of static or dynamic image.In order to distinguish mutually with the video content of each road vision signal, this synchronous event preferably being shotly can make the event of one section of video content containing image.
Preferably, described timestamp information comprises each frame of described synchronous event and the time corresponding with each frame.
In one embodiment, 4. described step comprises: first frame of the described synchronous event in vision signal described in each road and the initial time corresponding with described first frame are carried out synchronously as synchronous base vision signal described in multichannel.
In another embodiment, 4. described step comprises: last frame of the described synchronous event in vision signal described in each road and the end time corresponding with last frame described are carried out synchronously as synchronous base vision signal described in multichannel.
In one embodiment, described synchronous event is arrange synchroflash and control the process that described synchroflash carries out a synchronization flash.A synchronization flash can adopt the mode of flicker a period of time continuously, guarantees that each video recording device records whole synchronization flash process.
Preferably, described synchroflash is visible ray photoflash lamp or invisible light photoflash lamp.
More preferably, described synchroflash is laser flash lamp.Laser flash lamp belongs to the one of visible ray photoflash lamp, and the brightness of laser flash lamp is higher, and easier and other video contents distinguish.
Second object of the present invention is to provide a kind of multi-channel video synchronizer based on video content, it is characterized in that: comprise base, the multiple video recording device be placed on described base, the activation member simultaneously starting described multiple video recording device, synchroflash and start the button of described synchroflash.
Wherein, described synchroflash is visible ray photoflash lamp or invisible light photoflash lamp.In one embodiment, described synchroflash is laser flash lamp.
In one embodiment, the quantity of synchroflash is identical with the quantity of multiple video recording device, and multiple video recording device all has a camera lens respectively, and each synchroflash is located at below the front side of a camera lens correspondingly.Multiple synchroflash can be in parallel or be connected on same control circuit, controlled by the same switch on this same control circuit simultaneously.Multiple synchroflash also can independently be arranged on respective control circuit, and wirelessly carries out signal and communication with same remote control, utilizes this same remote control to control multiple synchroflash simultaneously.
Preferably, described multiple video recording device is distributed on described base along same circumference, and the shooting angle sum of multiple described video recording device is greater than or equal to 360 °.Preferred, the shooting angle of two adjacent video record device overlaps.In a specific embodiment, video recording device adopts the camera of wide-angle lens, and quantity is 4, and the shooting angle of each camera is more than or equal to 90 °, and 4 road videos of 4 camera shootings are sliceable after synchronous is 360 ° of panoramic videos.
Compared to prior art, multi-channel video based on video content splicing synchronous method provided by the invention, by adding a synchronous event in multiple video recording device shooting process simultaneously, make all to comprise this synchronous event in the video content of each road vision signal, then carry out synchronously according to the timestamp information of this synchronous event to multi-channel video signal after shooting terminates, easy to operate, synchronous event can be selected flexibly, does not need to transform original video recording device.Therefore, compared to prior art, it is synchronous that the multi-channel video synchronous method that the present invention is based on video content can realize multi-channel video, and more simple and easy to do, cost is lower.
The device of the above-mentioned multi-channel video synchronous method of employing provided by the invention, the multiple synchroflashes be separately positioned within the scope of the shooting angle of multiple video recording device are utilized to carry out a synchronization flash process as synchronous event, make can record this synchronous event in each video recording device shooting process, not only structure is simple, realize easily, and low cost of manufacture, be particularly useful for utilizing existing multiple camera to build in the application of panoramic video camera system temporarily.
Accompanying drawing explanation
Fig. 1 is the flow diagram of the embodiment of the present invention one based on the multi-channel video synchronous method of video content.
Fig. 2 is the perspective view of the embodiment of the present invention two based on the multi-channel video synchronizer of video content.
Fig. 3 is the explosive view of the embodiment of the present invention two based on the multi-channel video synchronizer of video content.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.
Embodiment one
Refer to Fig. 1, the invention provides a kind of multi-channel video synchronous method based on video content, comprise the following steps:
Step S01: start multiple video recording device
Open multiple video recording device to take.Multiple video recording device starts by same control member simultaneous operation, or operates each video recording device respectively and start, and which kind of mode starts that not affect multi-channel video synchronous.
Step S02: add synchronous event and obtain multi-channel video signal
When multiple described video recording device is all in shooting process, add a synchronous event, make each described video recording device record described synchronous event, obtain multi-channel video signal, in the video content of vision signal described in each road, all comprise described synchronous event.
Step S03: shooting terminates the timestamp information of rear acquisition synchronous event
After shooting terminates, analyze and extract described synchronous event described in the video content of vision signal described in each road, obtaining the timestamp information of synchronous event described in vision signal described in each road.Wherein, described timestamp information comprises each frame of described synchronous event and the time corresponding with each frame.
Step S04: the timestamp information according to synchronous event carries out synchronously
When simultaneous operation, the timestamp information of the described synchronous event in vision signal according to each road carries out synchronously vision signal described in multichannel.In a kind of simultaneous operation mode, only first frame of the described synchronous event in vision signal described in each road and the initial time corresponding with described first frame are carried out synchronously as synchronous base vision signal described in multichannel.In another kind of simultaneous operation mode, only last frame of the described synchronous event in vision signal described in each road and the end time corresponding with last frame described are carried out synchronously as synchronous base vision signal described in multichannel.Which kind of simultaneous operation mode of concrete employing, operator can select.After synchronously completing, by the mode of video-splicing, multi-channel video is spliced into panoramic video.
Described synchronous event is arrange a synchroflash and control the process that described photoflash lamp carries out a synchronization flash.A synchronization flash can adopt the mode of flicker a period of time continuously, guarantees that each video recording device records whole synchronization flash process.Described synchroflash is visible ray photoflash lamp or invisible light photoflash lamp, and the synchroflash that the present embodiment adopts is laser flash lamp.
Embodiment two
As shown in Figures 2 and 3, the invention provides a kind of multi-channel video synchronizer based on video content, it is synchronous that it can be used in multi-channel video, thus realize above-mentioned steps S01 to step S04.The camera 2 that this multi-channel video synchronizer comprises base 1, four of being placed on base 1 have wide-angle lens, start simultaneously four cameras 2 activation member 3, four synchroflashes 4 and start the button 5 of four synchroflashes simultaneously.Base 1 is supported by support 12.Camera 2 and synchroflash 4 one_to_one corresponding are arranged, and each synchroflash 5 is all arranged within the scope of the shooting angle of the camera 2 corresponded.Four cameras 2 all have the wide-angle lens that a shooting angle is greater than or equal to 90 ° respectively, and each synchroflash 4 is located at below the front side of the camera lens of a camera 2 correspondingly.Four cameras 2 are distributed on described base along same circumference, and the shooting angle sum of four cameras 2 is greater than or equal to 360 °.
When the shooting angle of four cameras 2 is all greater than 90 °, the shooting angle of two adjacent video record device overlaps, adopt shooting angle partly overlapping mode to be conducive to video-splicing process that the later stage carries out based on images match.
Wherein, four synchroflashes 4 can be all visible ray photoflash lamps or be all invisible light photoflash lamps.In the present embodiment, four synchroflashes 4 are all be laser flash lamp.Four synchroflashes adopt mode that is in parallel or series connection to be connected on same control circuit, are controlled by the same button 5 on this same control circuit simultaneously.
In the present embodiment, four cameras 2 are arranged in a foursquare shape, and four camera 2 one_to_one corresponding are arranged on four limits of this rectangle, base 1 have the groove 11 that four are laid camera 2.The top of four cameras 2 also covers a gland 6.Activation member 3 can be located on gland 6 up and down, and activation member 3 has four to downward-extension and is respectively used to the depression bar 31 of startup four cameras 2, and button 5 is arranged on gland 6, and is positioned at the below of activation member 3.After pressing activation member 3, four depression bars 31 press the shooting button of four cameras 2 respectively, and four cameras 4 start simultaneously to be taken; Meanwhile, activation member 3 has also touched button 5 after pressing simultaneously, controls the synchronization flash process that four synchroflashes 4 carry out the continuous flicker of a set time length.This synchronization flash process all to be taken by four cameras as synchronous event and is recorded, and makes all to contain this synchronous event in each road vision signal.
Certainly, four synchroflashes 4 also can independently be arranged on respective control circuit, and wirelessly carry out signal and communication with same remote control, utilize this same remote control to control multiple synchroflash simultaneously.
Adopt the multi-channel video synchronizer based on video content of the present invention, 4 road videos are obtained by 4 camera shootings, the synchronous event of synchronization flash process is all contained in 4 road videos, then can by this 4 tunnel audio video synchronization according to the timestamp information of this synchronous event according to the method for embodiment one, finally also sliceable is complete 360 ° of panoramic videos.
Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (10)
1., based on a multi-channel video synchronous method for video content, it is characterized in that, comprise the following steps:
1. open multiple video recording device to take;
2. when multiple described video recording device is all in shooting process, add a synchronous event, make each described video recording device record described synchronous event, obtain multi-channel video signal, in the video content of vision signal described in each road, all comprise described synchronous event;
3., after shooting terminates, analyze and extract described synchronous event described in the video content of vision signal described in each road, obtaining the timestamp information of synchronous event described in vision signal described in each road;
The timestamp information of the described synchronous event 4. in vision signal according to each road carries out synchronously vision signal described in multichannel.
2. a kind of multi-channel video synchronous method based on video content according to claim 1, is characterized in that: described timestamp information comprises each frame of described synchronous event and the time corresponding with each frame.
3. a kind of multi-channel video synchronous method based on video content according to claim 2, is characterized in that: 4. described step comprises: first frame of the described synchronous event in vision signal described in each road and the initial time corresponding with described first frame are carried out synchronously as synchronous base vision signal described in multichannel.
4. a kind of multi-channel video synchronous method based on video content according to claim 2, is characterized in that: 4. described step comprises: last frame of the described synchronous event in vision signal described in each road and the end time corresponding with last frame described are carried out synchronously as synchronous base vision signal described in multichannel.
5. a kind of multi-channel video synchronous method based on video content according to claim 1, is characterized in that: described synchronous event is arrange synchroflash and control the process that described synchroflash carries out a synchronization flash.
6. a kind of multi-channel video synchronous method based on video content according to claim 5, is characterized in that: described synchroflash is all visible ray photoflash lamp or is all invisible light photoflash lamp.
7. a kind of multi-channel video synchronous method based on video content according to claim 6, is characterized in that: described synchroflash is laser flash lamp.
8. based on a multi-channel video synchronizer for video content, it is characterized in that: comprise base, the multiple video recording device be placed on described base, the activation member simultaneously starting described multiple video recording device, synchroflash and start the button of described synchroflash.
9. the multi-channel video synchronizer based on video content according to claim 8, is characterized in that: described synchroflash is visible ray photoflash lamp or invisible light photoflash lamp.
10. the multi-channel video synchronizer based on video content according to claim 8, it is characterized in that: described multiple video recording device is distributed on described base along same circumference, the shooting angle sum of multiple described video recording device is greater than or equal to 360 °.
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