CN107124571B - Video storage method and device - Google Patents

Abstract

The present application provides a video recording storage method and device. The method includes: obtaining a code stream structure pre-configured by a video encoder; dividing a corresponding storage space for each layer according to the code stream layer recorded by the code stream structure; Each video frame in the code stream is sequentially stored in the storage space corresponding to the layer according to the layer to which it belongs; wherein, the priority and life cycle of the video frame stored in each storage space are negatively correlated with the number of layers to which it belongs. This application realizes the flexible life cycle management of video by storing the code stream in layers. Each storage space can be managed by setting different life cycles according to the priority of its corresponding layer. The life cycle of a video frame in a certain layer When it expires, the video frames in the storage space corresponding to this layer are discarded or overwritten, and there is no need to perform life cycle management on multiple reads and writes of the storage space by dumping frames or reducing the bit rate, thus reducing the number of recordings. The complexity of lifecycle management.

Description

Video storage method and device

technical field

The present application relates to the technical field of video surveillance, and in particular, to a video recording storage method and device.

Background technique

In order to facilitate the use of post-event verification, the storage of the collected video images is the most basic functional requirement of the video surveillance system. In the related art, the code stream generated by the video encoder is usually CBR (Constants Bit Rate, constant code stream), so the storage space in the video storage device can be divided into multiple space units according to the set size, and each space unit can be divided into multiple space units. Store the video of a fixed time unit, so as to realize the fast retrieval of video playback. After the video is stored in the video storage device, it will also involve the management of the life cycle of the video, that is to delete or overwrite the video according to the importance of the video, or transcode to a lower bit rate for dumping, or extract frames for dumping, However, whether it is to reduce the bit rate and dump or extract the frame, it all involves reading the original storage space, and overwriting the new code stream after the extraction or transcoding to the original storage space, which reduces the storage space. Secondary reads and writes add complexity to lifecycle management.

SUMMARY OF THE INVENTION

In view of this, the present application provides a video storage method and device to solve the problem that the existing storage method increases the complexity of life cycle management.

According to a first aspect of the embodiments of the present application, a video recording storage method is provided, the method is applied to a management server, and the method includes:

Obtain the code stream structure pre-configured by the video encoder;

The code stream layer recorded according to the code stream structure is divided into a corresponding storage space for each layer;

Each video frame in the code stream sent by the video encoder is sequentially stored in the storage space corresponding to the layer according to the layer to which it belongs;

Among them, the priority and life cycle of video frames stored in each storage space have a negative correlation with the number of layers to which they belong.

According to a second aspect of the embodiments of the present application, a video recording storage device is provided, the device is applied to a management server, and the device includes:

an acquisition unit, used for acquiring the code stream structure preconfigured by the video encoder;

a dividing unit, for dividing the corresponding storage space for each layer according to the code stream layer recorded by the code stream structure;

A first storage unit, used for sequentially storing each video frame in the code stream sent by the video encoder in the storage space corresponding to the layer according to the layer to which it belongs;

Among them, the priority and life cycle of video frames stored in each storage space have a negative correlation with the number of layers to which they belong.

Applying the embodiment of the present application, before storing the video recording of a certain video device, the management server may first obtain the code stream structure preconfigured in its video encoder, and record the code stream layer according to the obtained code stream structure for each layer. Divide the corresponding storage space, and then store each video frame in the code stream sent by the video encoder into the storage space corresponding to the layer in turn according to the layer to which it belongs, thus realizing the layering of the code stream generated by the video encoder. For the purpose of storage, since the priority and life cycle of the video frames stored in each storage space have a negative correlation with the number of layers to which they belong, each storage space can be set to different life cycles according to the priority of its corresponding layer. For management, when the life cycle of the video frame of a certain layer expires, the video frame in the corresponding storage space of the layer can be directly discarded or overwritten, without the need to transfer the frame by extracting or reducing the bit rate. The recording life cycle management is realized by multiple reading and writing of the storage space, so that the present application can realize flexible life cycle management through hierarchical storage, which reduces the complexity of the recording life cycle management.

Description of drawings

1 is a scene diagram of a video recording storage according to an exemplary embodiment of the present application;

2A is a flowchart of an embodiment of a video recording storage method according to an exemplary embodiment of the present application;

FIG. 2B is a code stream structure shown in the application according to the embodiment shown in FIG. 2A;

FIG. 2C is another code stream structure shown in the application according to the embodiment shown in FIG. 2A;

FIG. 3A is an embodiment flowchart of another video recording storage method according to an exemplary embodiment of the present application;

3B is a division diagram of a logical group and a logical unit shown in the application according to the code stream structure shown in FIG. 2B;

3C is a block space division diagram of a storage space shown in the application according to the logical group and logical unit structure shown in FIG. 3B;

FIG. 3D is a division diagram of a logical group and logical unit shown in the application according to the code stream structure shown in FIG. 2C;

3E is a block space division diagram of a storage space shown in the application according to the logical group and logical unit structure shown in FIG. 3D;

FIG. 4 is a hardware structure diagram of a management server according to an exemplary embodiment of the present application;

FIG. 5 is a structural diagram of an embodiment of a video recording storage device according to an exemplary embodiment of the present application.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.

The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited by these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information without departing from the scope of the present application. Depending on the context, the word "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determining."

FIG. 1 is a scene diagram of a video recording storage according to an exemplary embodiment of the present application. FIG. 1 includes a video device, a management server, and a video storage device, wherein the video device may be an IPC (Internet Protocol Camera, network camera), It is provided with a video acquirer and a video encoder, the video acquirer is used to collect surveillance video, and the video encoder is used to encode the surveillance video collected by the video acquirer and generate a code stream, and then send the generated code stream to the management server; The management server is used to store the received code stream to a video storage device; the video storage device can be an NVR (Network Video Recorder, network video storage) or an IPSAN device, which is used to provide storage space for the code stream data of the surveillance video.

FIG. 2A is a flowchart of an embodiment of a video recording storage method according to an exemplary embodiment of the application; FIG. 2B is a code stream structure shown in the application according to the embodiment shown in FIG. 2A ; Another code stream structure shown in the embodiment shown in FIG. 2A, the video recording storage method can be applied to the management server shown in FIG. 1 above. As shown in FIG. 2A, the video recording storage method includes the following steps:

Step 201: Acquire the code stream structure preconfigured by the video encoder.

In one embodiment, the management server may pre-configure the encoding rules of the video encoder to obtain the corresponding code stream structure, so that the corresponding code stream structure may be obtained from the video encoder in the video device.

Step 202: Divide the corresponding storage space for each layer according to the code stream layer recorded in the code stream structure.

In one embodiment, the code stream layer can be recorded in the code stream structure, that is, the number of code stream layers included in the code stream generated by the video encoder. Usually, the 0th layer in the code stream layer is the base layer, and the first layer or above is the base layer. The code stream layer is an enhancement layer. When decoding, the video frames of the enhancement layer need to be decoded according to the video frames of the base layer. Therefore, the video frames in the base layer are more important than those in the enhancement layer. high, the priority is also high, and as the number of layers increases, the importance of the video frames in the enhancement layer decreases, and the priority also decreases. Those skilled in the art can understand that the divided multiple storage spaces may be located on one hard disk of the video storage device, or may be located on multiple hard disks of the video storage device, and the size of each storage space can be determined according to actual needs. The settings may be the same or different, which is not limited in this application. In addition, the reference relationship between each video frame can also be recorded in the code stream structure.

It should be noted that the concept of GOP is usually involved in the code stream structure. GOP (Group Of Picture, video group length) refers to a group of continuous video frames, that is, an I frame is followed by multiple P frames. The start frame of a GOP is an I frame, and the end frame is the previous frame (P frame) of the start frame (I frame) of the next GOP, where the I frame records a complete picture, and the P frame is a forward prediction. Frame, which records the change relative to the previous frame (I frame or P frame). Generally, the length of the I frame is the longest, and the lengths of the P frames belonging to different layers are different, but the lengths of the P frames belonging to the same enhancement layer are generally the same. In addition, a GOP can include multiple root reference frames (I frames or P frames), and the number of frames included between each two root reference frames is the same. The start frame of a GOP is the first root reference frame, and the previous frame The root reference frame is the reference frame of the next reference frame, and the root reference frames all belong to the 0th layer of the code stream layer.

In an exemplary scenario, as shown in FIG. 2B , the code stream layers are layer 0 and layer 1, wherein the 0th layer includes frame 0, frame 2, frame 4, frame 6, and frame 8, and the first layer includes Frame 1, Frame 3, Frame 5, Frame 7, and Frame 0 and Frame 8 in the 0th layer are the root reference frames, and Frame 8 uses Frame 0 as the reference frame. In addition, the three video frames (frame 2, frame 4, and frame 6) that belong to the same layer 0 included between the two root reference frames all use the previous frame belonging to the same layer 0 as the reference frame, and the video frames in the first layer Frames take their previous frame as a reference frame. Therefore, the management server can divide two storage spaces (storage space 1 and storage space 2), and layer 0 corresponds to storage space 1, and layer 1 corresponds to storage space 2.

In another exemplary scenario, as shown in FIG. 2C , the code stream layers are layer 0, layer 1, and layer 2, and layer 0 includes frame 0, frame 4, frame 8, frame 12, and frame 16. Layers include Frame 2, Frame 6, Frame 10, Frame 14, Layer 2 includes Frame 1, Frame 3, Frame 5, Frame 7, Frame 9, Frame 11, Frame 13, Frame 15, and Frame 0 in Layer 0 And frame 16 is the root reference frame, and frame 16 takes frame 0 as the reference frame. In addition, the three video frames (frame 4, frame 8, and frame 12) that belong to the same layer 0 included between the two root reference frames all use the previous frame belonging to the same layer 0 as the reference frame. The video frames in the layer all use the previous frame as the reference frame. Therefore, the management server can divide three storage spaces (storage space 1 to storage space 3), and layer 0 corresponds to storage space 1, layer 1 corresponds to storage space 2, and layer 2 corresponds to storage space 3.

Step 203: each video frame in the code stream sent by the video encoder is sequentially stored in the storage space corresponding to the layer according to the layer to which it belongs; wherein, the priority and the life cycle corresponding to the video frame stored in each storage space, It has a negative correlation with the number of layers to which it belongs.

In one embodiment, because the priority and life cycle corresponding to the video frames stored in each storage space are negatively correlated with the number of layers to which they belong, that is, the lower the number of layers, the higher the priority of the video frames stored in the corresponding storage space. The lower the level, the lower the importance and the shorter the life cycle. Therefore, storing video frames belonging to different layers in different storage spaces can realize flexible life cycle management of video recordings.

In an exemplary scenario, as shown in FIG. 2B again, the frame 0, frame 2, frame 4, frame 6, and frame 8 included in the 0th layer can be stored in the storage space 1 in sequence, and the frame 1, Frame 3, frame 5, and frame 7 can be stored in storage space 2 in sequence. Among them, since the priority of the video frame of the 0th layer is higher than that of the video frame of the first layer, the life cycle corresponding to the video frame stored in the storage space 1 can be shorter, for example, 3 months, and the storage space 2 The corresponding life cycle of the video frames stored in the storage space can be longer, for example, 6 months, after 3 months, the video frames in the storage space 1 can be directly discarded or directly overwritten, and after 6 months, the storage space The video frames in 2 are directly discarded or directly overwritten.

It can be known from the above-mentioned embodiments that, before the management server stores the video recording of a certain video device, it can first obtain the pre-configured code stream structure in its video encoder, and record the code stream layer according to the obtained code stream structure for each layer. Divide the corresponding storage space, and then store each video frame in the code stream sent by the video encoder into the storage space corresponding to the layer in turn according to the layer to which it belongs, thus realizing the layering of the code stream generated by the video encoder. For the purpose of storage, since the priority and life cycle of the video frames stored in each storage space have a negative correlation with the number of layers to which they belong, each storage space can be set to different life cycles according to the priority of its corresponding layer. For management, when the life cycle of the video frame of a certain layer expires, the video frame in the corresponding storage space of the layer can be directly discarded or overwritten, without the need to transfer the frame by extracting or reducing the bit rate. The recording life cycle management is realized by multiple reading and writing of the storage space, so that the present application can realize flexible life cycle management through hierarchical storage, which reduces the complexity of the recording life cycle management.

FIG. 3A is an embodiment flowchart of another video recording storage method shown in the application according to an exemplary embodiment; FIG. 3B is a logic group and logic unit shown in the application according to the code stream structure shown in FIG. 2B . Division diagram; Fig. 3C is the block space division diagram of a kind of storage space shown by the application according to the logical group shown in Fig. 3B and the logical unit structure; Fig. 3D is the application shown according to the code stream structure shown in Fig. 2C A division diagram of a logical group and a logical unit; FIG. 3E is a block space division diagram of a storage space shown in the present application according to the logical group and logical unit structure shown in FIG. 3D , this embodiment uses the embodiment of the present application to provide The above-mentioned method is exemplified by how each video frame in the code stream sent by the video encoder is sequentially stored in the storage space corresponding to the layer according to the layer to which it belongs. As shown in Figure 3A, the video storage method It includes the following steps:

Step 301: Acquire the logic unit structure preconfigured by the video encoder.

In one embodiment, the management server may perform logical division in the video encoder according to the configured code stream structure, that is, pre-configure the logical unit structure, and the logical unit structure may record the code stream layers included in the logic unit and the frames included in each layer. number.

Step 302: Divide the code stream into logical units according to the logical unit structure, and the time units corresponding to each logical unit are the same.

For the process of dividing the code stream into logical units according to the logical unit structure, the management server may firstly divide the code stream into logical groups according to the number of frames included between the two root reference frames recorded in the code stream structure, wherein each logical The group starts from a certain root reference frame of the 0th layer and ends at the previous frame of the next root reference frame of the 0th layer, and then for each logical group, according to the logical unit structure, the video frames included in the logical group are The logical units are divided, wherein the number of frames included in the logical group is an integer multiple of the number of frames included in each logical unit, and the first frame in the previous logical unit is the reference frame of the first frame in the subsequent logical unit.

Among them, since each logical group starts from a certain root reference frame of the 0th layer and ends at the previous frame of the next root reference frame of the 0th layer, each logical group includes a root reference frame (I frame or P frame), the root reference frame is the leading frame of the logical group, and other video frames (P frames) in the logical group can be decoded only according to the root reference frame. Since the logical unit structure is the code stream layer included in the logical unit and the number of frames included in each layer, for each logical group, the logical unit can be divided according to the logical unit structure starting from the guide frame of the logical group, and the corresponding logical units The time units are all the same.

It should be noted that a logical group includes only one root reference frame, and the root reference frame is the guide frame of the logical group, and a GOP can include multiple root reference frames, so the logical group is not necessarily related to the GOP, usually a Multiple logical groups can be included in a GOP.

Step 303: Obtain the maximum frame code stream length included in each layer from the code stream layer included in each logical unit and the frame code stream length included in each layer, and in the storage space corresponding to each layer, according to the maximum frame included in the layer. The length of the code stream divides the block space for each logical unit.

In one embodiment, in order to facilitate the calculation of the retrieval position during video retrieval, the management server can divide the corresponding block space for each logical unit in the storage space, because some logical units include I frames, and some logical units do not. Including I frames, and the lengths of P frames belonging to different layers are also different, so the length of the frame code stream included in each logical unit divided cannot be the same. From the length of the frame code stream included in the layer, obtain the maximum frame code stream length included in each layer, and use the maximum frame code stream length as the size of each block space in the corresponding storage space, so as to ensure that each layer included in each logical unit can be guaranteed. The video frames can be completely stored in the block space of the corresponding storage space.

It should be noted that, since the code stream structure can be obtained by encoding the video frame of one GOP, the management server obtains the maximum frame included in each layer from the code stream layer included in each logical unit and the frame code stream length included in each layer. When the code stream length is used, the maximum frame code stream length included in each layer can be obtained from the code stream layers included in each logical unit belonging to a GOP and the frame code stream length included in each layer, or the maximum frame code stream length included in a GOP can also be obtained from each layer. From the code stream layer included in the first logical unit of the logical group and the frame code stream length included in each layer, obtain the maximum frame code stream length included in each layer instead of obtaining it from all the divided logical units, so as to improve the acquisition rate. efficiency.

In an exemplary scenario, as shown in the above-mentioned code stream in FIG. 2B, frame 0 and frame 8 are both root reference frames, the frame code stream length of frame 0 is M0 bytes, and frame 2, frame 4, frame The length of the frame code stream of 6 is M1 bytes, and the length of the frame code stream of frame 1, frame 3, frame 5, and frame 7 is all M2 bytes. The logical unit structure is layer 0 and layer 1, and layer 0 includes 1 frame, the first layer includes 1 frame, thus, the logical group and logical unit division as shown in FIG. 3B can be obtained, and the logical group (frame 0 to frame 7) includes 4 logical units (logical unit 0, logical unit 1) , logic unit 2 and logic unit 3), logic unit 0 includes frame 0 and frame 1, logic unit 1 includes frame 2 and frame 3, logic unit 2 includes frame 4 and frame 5, and logic unit 3 includes frame 6 and frame 7. Because the length of the I frame is the longest, the frame code stream length M0 bytes of the frame 0 of the 0th layer included in the logical unit 0 in the code stream structure is the largest, and because the length of the P frame of the first layer is M2 words Therefore, the maximum frame stream length of the first layer included in each logical unit is M2 bytes, and the block space division of the storage space as shown in FIG. 3C is obtained, and the time unit corresponding to each logical unit is t seconds.

In another exemplary scenario, as shown in another code stream shown in FIG. 2C above, frame 0 and frame 16 are both root reference frames, the frame code stream length of frame 0 is M3 bytes, and the length of frame 4 and frame 8 is M3 bytes. , The frame stream length of frame 12 is M4 bytes, the frame stream length of frame 2, frame 6, frame 10, and frame 14 are all M5 bytes, frame 1, frame 3, frame 5, frame 7, frame 9. , Frame 11, Frame 13, Frame 15 The length of the frame stream is M6 bytes, the logical unit structure is 0, 1 and 2 layers, the 0th layer includes 1 frame, the first layer includes 1 frame, the first layer Layer 2 includes 2 frames, thus, the logical group and logical unit division as shown in FIG. 3D can be obtained, and the logical group (frame 0 to frame 15) includes 4 logical units (logical unit 0, logical unit 1, logical unit 2 and logic unit 3), logic unit 0 includes frame 0 to frame 3, logic unit 1 includes frame 4 to frame 7, logic unit 2 includes frame 8 to frame 11, and logic unit 3 includes frame 12 to frame 15. Because the length of the I frame is the longest, the frame code stream length M3 bytes of the frame 0 of the 0th layer included in the logical unit 0 in the code stream structure is the largest, and the length of the P frame of the first layer is M3 bytes. , so the maximum frame stream length of layer 1 included in each logical unit is M5 bytes, and since the length of the P frame of layer 2 is M6 bytes, the maximum length of layer 2 included by each logical unit is M6 bytes. The length of the frame stream is 2*M6, and then the block space division of the storage space as shown in FIG. 3E is obtained, and the time unit corresponding to each logical unit is t seconds.

Step 304: The video frames included in each logical unit are stored in the corresponding block space of the corresponding storage space according to the layer to which they belong.

It should be noted that, in order to quickly retrieve the storage location of the video and perform reading and playback when the video is played back, the management server can determine the maximum frame code stream length included in each layer obtained in step 303 as the logical unit in the corresponding storage space. The size of the space occupied in each storage space, and the size of the space occupied by the determined logical unit in each storage space, the starting position of each storage space and the starting time of the code stream are recorded in the index list, when a retrieval instruction is received. , according to the starting position of each storage space recorded in the index list, the size of the space occupied by the logical unit in each storage space, and the start and end time of the retrieval video carried by the retrieval instruction to obtain the start and end positions of the retrieval video in each storage space , and read the video frames in each storage space in parallel according to the obtained starting and ending positions in each storage space, and finally write the read video frames into the decoding buffer list according to the frame number, and send the decoding buffer list to the decoder. for the decoder to decode and play back. Since each storage space is physically separated, after obtaining the start and end positions in each storage space, the video frames in each storage space can be read in parallel, while in the prior art, only one storage space can be used in one storage space. In this way, the delay of video retrieval and playback can be reduced.

Further, the management server can also calculate the number of logical units included in the start and end time period according to the start and end time of the retrieval video carried by the retrieval instruction, and in addition, can also calculate the position of a certain logic unit in each storage space, thereby Fast retrieval and playback of video frames belonging to different layers that are stored in different storage spaces and that are temporally adjacent and belong to the same logical unit can be realized.

In an exemplary scenario, as shown in FIG. 3C, it is assumed that the starting position of the storage space 1 recorded in the index list is K1, the starting position of the storage space 2 is K2, the starting time of the code stream is T, and the logic unit The size of the space occupied in the storage space 1 is M0 bytes, the size of the space occupied in the storage space 2 is M2 bytes, and the time unit corresponding to the logical unit is t seconds. The start and end times are T-start and T-end, then the start and end positions of the retrieved video in storage space 1 are K1+(T-start-T)/t*M0 and K1+(T-end-T)/t*M0, respectively. The starting and ending positions in storage space 2 are K2+(T-start-T)/t*M2 and K2+(T-end-T)/t*M2 respectively, so that the starting and ending positions in storage space 1 can be read as K1+(T -start-T)/t*M0 and K1+(T-end-T)/t*M0 and start and end positions in storage space 2 are K2+(T-start-T)/t*M2 and K2+(T -end-T)/t*M2, and write the read video frame into the decoding buffer list according to the frame number and send it to the decoder, so that the decoder can decode and play it back.

In addition, the management server may also calculate that the number of logical units included in the start and end time period is m=(T-end-T-start)/t. The position of the nth (n<=m) logical unit in storage space 1 is K1+(T-start-T)/t*M0*n, and the position in storage space 2 is K2+(T-start-T) /t*M2*n.

It should be further explained that the management server may set a unit of a preset size in the header of each block space in each storage space, and store the video frames included in each logical unit into the corresponding storage space according to the layer to which it belongs. At the same time, the actual frame code stream length is stored in the unit of the preset size in the header of the block space. Thus, for each storage space, for the process of reading the video frames in the start and end position segments of the storage space, the management server may, for each storage space, store data according to each block space header in the start and end position segments of the storage space. The actual frame stream length reads the video frames in each block space to improve the reading efficiency.

It can be seen from the above embodiment that when the management server stores the code stream sent by the video encoder according to the layer, it can first obtain the logical unit structure pre-configured by the video encoder, and divide the code stream into logical units according to the logical unit structure, and each code stream is divided into logical units. The time units corresponding to the logical units are the same, and then the maximum frame code stream length included in each layer is obtained from the code stream layer included in each logical unit and the frame code stream length included in each layer, and in the corresponding storage space of each layer, according to The maximum frame stream length included in this layer divides the block space for each logical unit. Finally, the video frames included in each logical unit are stored in the corresponding block space of the corresponding storage space according to the layer to which they belong, so that the logical unit can realize the separation method. storage. In addition, since each logical unit corresponds to a block space in each storage space, and each logical unit corresponds to the same time unit, it is convenient to quickly calculate the retrieval position during video retrieval.

Corresponding to the foregoing embodiments of the video recording storage method, the present application also provides an embodiment of a video recording storage device.

The embodiments of the video recording storage device of the present application can be applied to a management server. The apparatus embodiment may be implemented by software, or may be implemented by hardware or a combination of software and hardware. Taking software implementation as an example, a device in a logical sense is formed by reading the corresponding computer program instructions in the non-volatile memory into the memory for operation by the processor of the device where it is located. From a hardware perspective, as shown in FIG. 4 , it is a hardware structure diagram of a management server according to an exemplary embodiment of the present application, except for the processor, memory, network interface, and nonvolatile memory shown in FIG. 4 In addition to the non-volatile memory, the device in which the apparatus in the embodiment is located usually may also include other hardware according to the actual function of the device, which will not be repeated here.

FIG. 5 is a structural diagram of an embodiment of a video recording storage device according to an exemplary embodiment of the present application. The video recording storage device can be applied to a management server. As shown in FIG. 5 , the video recording storage device includes: an acquisition unit 51 , a dividing unit 52 , and a first storage unit 53 .

Wherein, the obtaining unit 51 is used to obtain the code stream structure preconfigured by the video encoder;

The dividing unit 52 is used for dividing the corresponding storage space for each layer according to the code stream layer recorded by the code stream structure;

The first storage unit 53 is used to sequentially store each video frame in the code stream sent by the video encoder in the storage space corresponding to this layer according to the layer to which it belongs;

Among them, the priority and life cycle of video frames stored in each storage space have a negative correlation with the number of layers to which they belong.

In an optional implementation manner, the first storage unit 53 is specifically configured to acquire a logic unit structure preconfigured by the video encoder; perform logic unit division on the code stream according to the logic unit structure; wherein , the time units corresponding to each logical unit are the same; obtain the maximum frame code stream length included in each layer from the code stream layer included in each logical unit and the frame code stream length included in each layer; in the storage space corresponding to each layer, according to The maximum frame code stream length included in this layer is divided into block space for each logical unit; the video frames included in each logical unit are stored in the corresponding block space of the corresponding storage space according to the layer to which they belong.

In an optional implementation manner, the first storage unit 53 is also specifically configured to, in the process of logically dividing the code stream according to the logical unit structure, record two data streams according to the code stream structure. The number of frames included between the root reference frames divides the code stream into logical groups; wherein, each logical group starts from a certain root reference frame of the 0th layer and goes to the next root reference frame of the 0th layer. The frame ends; for each logical group, the video frames included in the logical group are divided into logical units according to the logical unit structure; wherein, the number of frames included in the logical group is an integer multiple of the number of frames included in each logical unit, and the preceding The first frame in one logical unit is the reference frame of the first frame in the following logical unit.

In an optional implementation manner, the apparatus further includes (not shown in FIG. 5 ):

The recording unit is used to determine the acquired maximum frame stream length included in each layer as the size of the space occupied by the logical unit in the corresponding storage space; the size of the space occupied by the determined logical unit in each storage space, the size of each storage space The starting position of the space and the starting time of the code stream are recorded in the index list;

The retrieval and playback unit is used for, when receiving the retrieval instruction, according to the starting position of each storage space recorded in the index list and the size of the space occupied by the logical unit in each storage space, the retrieval instruction carried by the retrieval instruction The start and end time of the video recording and the time unit corresponding to the logical unit obtain the start and end positions of the retrieval video in each storage space; read the video frames in each storage space in parallel according to the obtained start and end positions in each storage space; The video frame is written into the decoding buffer list according to the frame number, and the decoding buffer list is sent to the decoder, so that the decoder can perform decoding and playback.

In an optional implementation manner, each block space header in each storage space is provided with a unit of a preset size, and the apparatus further includes (not shown in FIG. 5 ):

The second storage unit is used to store the video frame included in each logical unit in the corresponding block space of the corresponding storage space according to the layer to which it belongs, and at the same time store the actual frame stream length in the preset preset in the block space header size unit;

The retrieval and playback unit is specifically used for, for each storage space, in the process of reading the video frames in the start and end position segments of the storage space, for each storage space, according to each block in the start and end position segments of the storage space. The actual frame stream length stored in the space header reads the video frames in each block space.

For details of the implementation process of the functions and functions of each unit in the above device, please refer to the implementation process of the corresponding steps in the above method, which will not be repeated here.

For the apparatus embodiments, since they basically correspond to the method embodiments, reference may be made to the partial descriptions of the method embodiments for related parts. The device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of the present application. Those of ordinary skill in the art can understand and implement it without creative effort.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the present application. within the scope of protection.

Claims (8)

1. A recording storage method, the method is applied to a management server, wherein the method comprises: Obtain the code stream structure pre-configured by the video encoder; The code stream layer recorded according to the code stream structure is divided into a corresponding storage space for each layer; Storing each video frame in the code stream sent by the video encoder into the storage space corresponding to the layer in sequence according to the layer to which it belongs, including: acquiring a logic unit structure preconfigured by the video encoder; according to the logic unit The structure divides the code stream into logical units; wherein, the time units corresponding to each logical unit are the same, and the time unit is used to represent the duration of the logical unit; from the code stream layer included in each logical unit and the frame code included in each layer Obtain the maximum frame code stream length included in each layer from the stream length; in the storage space corresponding to each layer, divide the block space for each logical unit according to the maximum frame code stream length included in the layer; divide the video frames included in each logical unit into It is stored in the corresponding block space of the corresponding storage space according to the layer to which it belongs, wherein the video frames of the same layer are stored in the corresponding block space with continuous addresses; Among them, the priority and life cycle of video frames stored in each storage space have a negative correlation with the number of layers to which they belong. 2. The method according to claim 1, wherein the logical unit division of the code stream according to the logical unit structure comprises: The code stream is divided into logical groups according to the number of frames included between two root reference frames recorded by the code stream structure; wherein, each logical group starts from a certain root reference frame of the 0th layer and ends at the 0th layer. the end of the previous frame of the next root reference frame of the layer; For each logical group, the video frames included in the logical group are divided into logical units according to the logical unit structure; wherein the number of frames included in the logical group is an integer multiple of the number of frames included in each logical unit, and the previous logical unit The first frame in is the reference frame of the first frame in the following logical unit. 3. The method according to claim 1, wherein the method further comprises: Determine the maximum frame code stream length included in each layer obtained as the size of the space occupied by the logical unit in the corresponding storage space; The size of the space occupied by the determined logical unit in each storage space, the starting position of each storage space and the starting time of the code stream are recorded in the index list; When a retrieval instruction is received, according to the starting position of each storage space recorded in the index list and the size of the space occupied by the logical unit in each storage space, the start and end time of the retrieval video carried by the retrieval instruction, the logical The time unit corresponding to the unit obtains the start and end positions of the retrieval video in each storage space; Read the video frames in each storage space in parallel according to the obtained start and end positions in each storage space; The read video frame is written into the decoding buffer list according to the frame number, and the decoding buffer list is sent to the decoder, so that the decoder can perform decoding and playback. 4. The method according to claim 3, wherein each block space header in each storage space is provided with a unit of a preset size, and the method further comprises: While storing the video frame included in each logical unit in the corresponding block space of the corresponding storage space according to the layer to which it belongs, the actual frame stream length is stored in the unit of the preset size in the header of the block space; For each storage space, read the video frames in the start and end position segments of the storage space, including: For each storage space, the video frame in each block space is read according to the actual frame code stream length stored in the header of each block space in the start and end position segments of the storage space. 5. A recording storage device, the device is applied to a management server, wherein the device comprises: an acquisition unit, used for acquiring the code stream structure preconfigured by the video encoder; a dividing unit, for dividing the corresponding storage space for each layer according to the code stream layer recorded by the code stream structure; The first storage unit is used for sequentially storing each video frame in the code stream sent by the video encoder into the storage space corresponding to the layer according to the layer to which it belongs, including: acquiring a logic unit preconfigured by the video encoder structure; the code stream is divided into logical units according to the logical unit structure; wherein, the time units corresponding to each logical unit are the same, and the time units are used to represent the duration of the logical unit; from the code stream layer included in each logical unit Obtain the maximum frame code stream length included in each layer from the frame code stream length included in each layer; in the storage space corresponding to each layer, divide the block space for each logical unit according to the maximum frame code stream length included in the layer; The video frames included in the logical unit are stored in the corresponding block space of the corresponding storage space according to the layer to which they belong, wherein the video frames of the same layer are stored in the corresponding block space with continuous addresses; Among them, the priority and life cycle of video frames stored in each storage space have a negative correlation with the number of layers to which they belong. 6. The device of claim 5, wherein: The first storage unit is also specifically configured to pair the number of frames included between two root reference frames recorded according to the code stream structure in the process of logically dividing the code stream according to the logic unit structure. The code stream is divided into logical groups; wherein, each logical group starts from a certain root reference frame of the 0th layer and ends at the previous frame of the next root reference frame of the 0th layer; for each logical group, according to The logical unit structure divides the video frames included in the logical group into logical units; wherein, the number of frames included in the logical group is an integer multiple of the number of frames included in each logical unit, and the first frame in the previous logical unit is The reference frame for the first frame in the following logical unit. 7. The apparatus of claim 5, wherein the apparatus further comprises: The recording unit is used to determine the acquired maximum frame stream length included in each layer as the size of the space occupied by the logical unit in the corresponding storage space; the size of the space occupied by the determined logical unit in each storage space, the size of each storage space The starting position of the space and the starting time of the code stream are recorded in the index list; The retrieval and playback unit is used for, when receiving the retrieval instruction, according to the starting position of each storage space recorded in the index list and the size of the space occupied by the logical unit in each storage space, the retrieval instruction carried by the retrieval instruction The start and end time of the video recording and the time unit corresponding to the logical unit obtain the start and end positions of the retrieval video in each storage space; read the video frames in each storage space in parallel according to the obtained start and end positions in each storage space; The video frame is written into the decoding buffer list according to the frame number, and the decoding buffer list is sent to the decoder, so that the decoder can perform decoding and playback. 8. The device according to claim 7, wherein each block space header in each storage space is provided with a unit of a preset size, and the device further comprises: The second storage unit is used to store the video frame included in each logical unit in the corresponding block space of the corresponding storage space according to the layer to which it belongs, and at the same time store the actual frame stream length in the preset preset in the block space header size unit; The retrieval and playback unit is specifically used for, for each storage space, in the process of reading the video frames in the start and end position segments of the storage space, for each storage space, according to each block in the start and end position segments of the storage space. The actual frame stream length stored in the space header reads the video frames in each block space.

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