CN115412741A - Data packaging method, data analyzing method, data packaging device, data analyzing device, electronic equipment and readable storage medium - Google Patents
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Abstract
The embodiment of the invention provides a data packaging and analyzing method, a data packaging and analyzing device, electronic equipment and a readable storage medium, wherein the method comprises the following steps: acquiring video information, wherein the video information at least comprises: the video coding method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the plurality of video frames, and a timestamp difference value of any two adjacent video frames in the plurality of video frames; packaging the video information into a PES packet of a packed elementary stream; packaging the PES data packets into a plurality of TS data packets based on a preset format condition, wherein the plurality of TS data packets comprise a target TS data packet, the target TS data packet comprises supplementary bytes, and the supplementary bytes are used for meeting the preset format condition; and sending the plurality of TS data packets to the client. According to the embodiment of the invention, transmission resources can be saved.
Description
Technical Field
The present invention relates to the field of data processing technologies, and in particular, to a data encapsulation and parsing method, an apparatus, an electronic device, and a readable storage medium.
Background
With the continuous development of information technology, live broadcast is more and more widely applied to the life and work of people. At present, in the process of packaging video data in live broadcast into TS data packets, the video data is massive, so that the cost of transmission bandwidth is huge.
Therefore, there is a need for a method for saving transmission resources for transmitting TS packets.
Disclosure of Invention
Embodiments of the present invention provide a data encapsulation method, a data analysis method, a data encapsulation device, an electronic device, and a readable storage medium, which can save transmission resources. The specific technical scheme is as follows:
in a first aspect of the present invention, there is provided a data encapsulation method, including:
acquiring video information, wherein the video information at least comprises: the video processing method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the video frames, and a timestamp difference value of any two adjacent video frames in the video frames;
packaging the video information into a PES packet of a packed elementary stream;
packaging the PES data packets into a plurality of TS data packets based on a preset format condition, wherein the plurality of TS data packets comprise a target TS data packet, the target TS data packet comprises supplementary bytes, and the supplementary bytes are used for meeting the preset format condition;
and sending the plurality of TS data packets to a client for the client to analyze the plurality of TS data packets, determining the time stamp of each video frame, and generating a target video with a preset time sequence relation according to the time stamp of each video frame and the plurality of video frames.
In a second aspect of the present invention, there is provided a data parsing method, including:
downloading the received TS data packets;
determining a PES packet based on the plurality of TS packets, the PES packet containing video information, the video information comprising: the time stamp of the first video frame in the plurality of video frames and the time stamp difference value of any two adjacent video frames in the plurality of video frames;
determining the time stamp of each video frame according to the time stamp of the first video frame in the plurality of video frames and the time stamp difference value of any two adjacent video frames in the plurality of video frames;
and generating a target video with a preset time sequence relation according to the timestamp of each video frame and the plurality of video frames.
In a third aspect of the present invention, there is also provided a data encapsulation apparatus, including:
the acquisition module is used for acquiring video information, and the video information at least comprises: the video processing method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the video frames, and a timestamp difference value of any two adjacent video frames in the video frames;
the packaging module is used for packaging the video information into a PES (packetized elementary stream) data packet;
the encapsulating module is further used for encapsulating the PES data packet into a plurality of TS data packets based on a preset format condition, the plurality of TS data packets comprise a target TS data packet, the target TS data packet comprises supplementary bytes, and the supplementary bytes are used for meeting the preset format condition;
and the sending module is used for sending the TS data packets to the client so that the client can analyze the TS data packets, determine the time stamp of each video frame, and generate the target video with the preset time sequence relation according to the time stamp of each video frame and the video frames.
In a fourth aspect of the present invention, there is also provided a data analysis apparatus, including:
the download module is used for downloading the received TS data packets;
a determining module, configured to determine a PES packet according to a plurality of TS packets, where the PES packet contains video information, and the video information includes: the time stamp of the first video frame in a plurality of video frames and the time stamp difference value of any two adjacent video frames in the plurality of video frames;
the determining module is further used for determining the timestamp of each video frame according to the timestamp of the first video frame in the plurality of video frames and the timestamp difference value of any two adjacent video frames in the plurality of video frames;
and the generating module is used for generating a target video with a preset time sequence relation according to the timestamp of each video frame and the plurality of video frames.
In yet another aspect of the present invention, there is also provided a computer-readable storage medium having stored therein instructions, which when run on a computer, cause the computer to execute any of the above-described data forwarding methods.
In yet another aspect of the present invention, there is also provided a computer program product containing instructions which, when run on a computer, cause the computer to perform any of the data encapsulation methods described above.
In the data encapsulation method provided by the embodiment of the invention, by acquiring the video information, the video information at least comprises the following steps: the video processing method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the video frames, and a timestamp difference value of any two adjacent video frames in the video frames; the video information is encapsulated into PES packets. Here, by encapsulating a plurality of video frames into one PES packet, in the subsequent process of encapsulating PES packets into a plurality of TS packets based on the preset format condition, the occurrence of target TS packets is greatly reduced, thereby reducing the supplementary bytes for being encapsulated into the target TS packets in satisfaction of the preset format condition. And finally, sending the plurality of TS data packets to a client for the client to analyze the plurality of TS data packets, wherein the preset time sequence relation of the plurality of video frames included in the PES data packets can be clearly indicated due to the timestamp of the first video frame in the plurality of video frames and the timestamp difference value of any two adjacent video frames in the plurality of video frames, namely the client can determine the timestamp of each video frame, so that the client can generate the target video with the preset time sequence relation according to the timestamp of each video frame and the plurality of video frames. Therefore, under the condition that the video frame can be effectively analyzed, the storage resource and the transmission resource can be saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a flowchart of a data encapsulation method according to an embodiment of the present invention;
fig. 2 is a flowchart of a data parsing method according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a data packaging apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a data analysis apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
First, technical terms related to the embodiments of the present invention will be briefly described.
A Transport Stream (TS) is a Transport Stream in which a plurality of components of a program are organized according to their correlation relationship, and the relationship description of each component and program composition information are added, and further encapsulated into Transport packets. The TS stream is a packet transport stream that packs video and audio data into transport packets and transmits them, and is mainly used for program transmission. The transport packet length of a TS is fixed and is typically 188 bytes. The TS is used for packetizing the packetized elementary stream data plus information relevant for network transmission.
The TS packets can transmit the program content in real time, which requires that any TS packet of the transport stream can be decoded independently and used in the live broadcast. The TS slice live broadcast is widely used for live broadcast scenes such as sports programs, entertainment programs, news programs and the like. It is also well suited to store live content in slices, just because any TS packet of a transport stream can be decoded independently at the beginning.
Elementary Streams (ESs), also called ES streams, mainly contain actual audio and video data. The stream directly representing the content of the basic elements formed after the components of the digital television are coded comprises continuous code streams of video, audio or data.
A Packetized Elementary Stream (PES) is provided with time stamp information mainly on the basis of audio-video data. The basic ES stream is divided into data packets with different lengths according to the requirement, and a packet header is added to form a packaged basic code stream PES stream.
A Program Association Table (PAT) gives identification information of a PMT corresponding to each Program.
The Program Map Table (PMT) gives identification information of various audio and video streams in a Program.
A Service description Section (SDT), which may provide information including: whether a program is being played, whether the program is encrypted, and the name of the program.
The PAT and PMT are the most important tables in TS packetization, the two tables are an index for multiplexing of multiple terminals, and the decoder needs to know which programs exist according to the PAT and which ES streams exist in each program, that is, audio, video, or subtitles, according to the PMT.
Presentation Time Stamp (PTS) is mainly used to measure when a decoded video frame is displayed. The presentation time of a video frame obtained by decoding a compressed frame is equivalent to data that tells the player when to present the frame.
A Decoding Time Stamp (DTS) is mainly used to identify when a bit stream read into a memory starts to be sent to a decoder for Decoding.
The data encapsulation and analysis method, device, electronic device and readable storage medium provided by the embodiments of the present invention can be applied to at least the following application scenarios, which are described below.
At present, in the process of packaging audio and video data in live broadcasting through a TS, on one hand, when PAT, PMT, and SDT data packets which are frequently sent are packaged into a TS data packet, a large number of redundant bytes are generated. On the other hand, TS encapsulation is to encapsulate the audio/video frames into PES packets, and then to encapsulate the PES packets twice and split the PES packets into 188-byte TS packets. Therefore, especially in the processing scenario of low-definition video frames, the low-definition video frames themselves are small, which results in too many PES packets being packed, so that the redundant bytes of 188 bytes in the last TS packet that is split during secondary packing is increased. This brings redundant bandwidth costs to the streaming live service.
Based on the application scenario, the following describes the data encapsulation method, the data analysis method, the apparatus, the electronic device, and the readable storage medium provided in the embodiments of the present invention in detail.
Fig. 1 is a flowchart of a data encapsulation method provided in an embodiment of the present invention, which is applied to a server, and as shown in fig. 1:
At step 120, the video information is encapsulated into packetized elementary stream PES packets.
And step 130, packaging the PES packets into a plurality of TS packets based on the preset format condition, where the plurality of TS packets includes a target TS packet, and the target TS packet includes a supplemental byte, where the supplemental byte is used to satisfy the preset format condition.
In the embodiment of the present invention, by acquiring the video information, the video information at least includes: the video coding method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the plurality of video frames, and a timestamp difference value of any two adjacent video frames in the plurality of video frames; the video information is encapsulated into PES packets. Here, by encapsulating a plurality of video frames into one PES packet, in the subsequent process of encapsulating PES packets into a plurality of TS packets based on the preset format condition, the occurrence of target TS packets is greatly reduced, thereby reducing the supplementary bytes for being encapsulated into the target TS packets in satisfaction of the preset format condition. And finally, sending the plurality of TS data packets to a client for the client to analyze the plurality of TS data packets, wherein the time stamp of the first video frame in the plurality of video frames and the time stamp difference value of any two adjacent video frames in the plurality of video frames can clearly indicate the preset time sequence relation of the plurality of video frames included in the PES data packets, namely the client can determine the time stamp of each video frame, so that the client can generate a target video with the preset time sequence relation according to the time stamp of each video frame and the plurality of video frames. Therefore, under the condition that the video frame can be effectively analyzed, the storage resource and the transmission resource can be saved.
Specific implementations of the above steps are described below.
Step 110 is involved.
Acquiring video information, wherein the video information at least comprises: the video coding method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the plurality of video frames, and a timestamp difference value of any two adjacent video frames in the plurality of video frames. Wherein the time stamp of each video frame includes a DTS and a PTS.
For example, if 4 video frames are encapsulated in one PES packet, the number of the plurality of video frames is 4.
Wherein the timestamp difference of any two adjacent video frames in the plurality of video frames may include:
the DTS and PTS difference values DTS _ diff1, PTS _ diff1 of the 2 nd frame and the 1 st frame; the DTS and PTS differences DTS _ diff2, PTS _ diff2 of frame 3 and frame 2; the DTS and PTS differences DTS _ diff3, PTS _ diff3 of frame 4 and frame 3.
From the DTS and PTS values DTS0 and PTS0 of the first video frame defined in the PES header, the DTS and PTS of the following video frames encapsulated in the PES packet can be calculated:
DTS1＝DTS0+DTS_diff1；
PTS1＝PTS0+PTS_diff1；
DTS2＝DTS1+DTS_diff2；
PTS2＝PTS1+PTS_diff2；
DTS3＝DTS1+DTS_diff3；
PTS3＝PTS1+PTS_diff3。
step 120 is involved.
The video information is encapsulated into PES packets.
The storage position in the PES data packet is a preset data storage position defined in the PES syntax.
The video frame information of a plurality of video frames can be written in a private data area, namely a preset storage position, so as to be used for downloading and parsing for the client.
The preset storage position can be located in PES _ private _ data defined in the MPEG-TS protocol PES syntax; the preset storage location may also be located at a storage location (i.e., SEI NAL UNIT) before a plurality of video frames of one PES packet.
Specifically, the data corresponding to the preset storage position may include: PES contains video frame number video _ frame _ number timestamp of the first video frame of a plurality of video frames, and timestamp difference values dts _ diffi and pts _ diffi of any two adjacent video frames of the plurality of video frames.
In addition, the video information may further include: a plurality of audio frames, and a timestamp of a first audio frame of the plurality of audio frames.
Compared with video, in the aspect of playing synchronization, each audio frame has a specific playing time length, so that when a plurality of audio frames are put into one PES packet, only the DTS and the PTS of the first audio frame are defined in the PES packet header, and the incremental DTS and PTS difference values of the subsequent audio frames are not required to be defined in the private data area.
For the audio frame and the video frame in the same video, the audio frame and the video frame may be adjusted to achieve synchronization by adjusting the playing time of each frame of the audio and the video to be substantially equal.
Therefore, a plurality of audio frames are packaged in one PES packet, redundant padding bytes generated by secondary packaging are reduced, and the occupation ratio of the redundant padding bytes in a packaging code stream is larger due to the small low-definition video frame, so that the code rate bandwidth can be reduced to a greater extent.
Step 130 is involved.
And packaging the PES data packets into a plurality of TS data packets based on the preset format condition, wherein the plurality of TS data packets comprise a target TS data packet, and the target TS data packet comprises supplementary bytes which are used for meeting the preset format condition.
Illustratively, if one PES packet includes one video frame, each video frame corresponds to a group of supplemental bytes in the last TS packet when the PES packet is encapsulated as a TS packet, and the supplemental bytes are redundant bytes for satisfying a preset format condition. Ten video frames correspond to ten sets of supplemental bytes.
On the other hand, if ten video frames are contained in one PES packet, the ten video frames correspond to one set of supplemental bytes. Ten video frames are also packed, and the generated supplementary bytes are greatly reduced. In this way, by placing a plurality of video frames in one PES packet, the probability of the occurrence of complementary bytes in the last TS packet when the PES packet is secondarily packetized and split can be reduced.
Therefore, a plurality of audio and video frames are packaged into one PES packet, so that the frequency of the last TS packet in the second TS packaging and dismounting time is reduced, and the redundant padding bytes are reduced.
In a possible embodiment, before step 130, the following steps may be further included:
determining a key video frame from a plurality of video frames;
and encapsulating the program association table PAT and the program mapping table PMT into the PES data packet, wherein the first storage positions of the PAT and the PMT in the PES data packet are adjacent to the second storage position of the key video frame in the PES data packet, and the resolution time corresponding to the data at the first storage position is earlier than the resolution time corresponding to the data at the second storage position.
The key video frame, also called video key frame, refers to the frame where the key action is located in the change of the motion of the character or object, and is equivalent to the original picture in the two-dimensional animation. Animations from key frame to key frame can be added by software creation, called transition frames or intermediate frames.
The PAT table and the PMT table provide identification information of audio and video data PES packets, so that the encapsulation and the analysis are necessary, live TS slices are considered to be reliable transmission downloading, and the first frame of slice data is always a video key frame, namely a target video frame. Therefore, the PAT and PMT tables can be packaged before each target video frame, and reliable downloading and playing and live-broadcast review can be guaranteed.
The first storage position of PAT and PMT in PES data packet is adjacent to the second storage position of key video frame in PES data packet, the resolution time corresponding to the data at the first storage position is prior to the resolution time corresponding to the data at the second storage position.
That is, when parsing the PES packet, the client first obtains the PAT and the PMT located in the first storage location in the PES packet, and then obtains the key video frame located in the second storage location in the PES packet. The PAT and the PMT are determined first, the identification information of the key video frame can be determined, thereby the identification information of other video frames having preset association relation with the key video frame is determined,
in addition, for the SDT table, since it is not necessary in the process of downloading and playing, it is possible to choose not to produce the package, i.e. not to make any package transmission.
Therefore, the PAT and the PMT are only packaged before the first video key video frame of the slice during packaging, and because the video key frame is the frame where the key action is located in the movement change of the role or the object, and other video frames and the key video frame have a preset association relationship, the identification information of the key video frame can be determined by knowing the PAT and the PMT, so that the identification information of other video frames can be determined. Ensures that the slice can be played and reviewed from any position download without the need for periodic retransmission of the PAT/PMT table.
Therefore, by reducing the sending frequency of the PAT and the PMT, the PAT and the PMT tables are only packaged before the target video frame, the bandwidth can be reduced, and the packaging load of the live broadcast slice stream can be directly reduced.
In a possible embodiment, the step 130 may specifically include the following steps:
splitting video information in the PES data packet into a plurality of pieces of sub-video information based on a preset byte number;
the plurality of sub video information is encapsulated into a plurality of TS packets, respectively.
The preset number of bytes may be 188 bytes.
Illustratively, the PES packet includes ten video frames, each of the video frames has 100 bytes, that is, the video information in the PES packet has 1000 bytes, and the splitting of the video information in the PES packet into a plurality of sub-video information based on the preset number of bytes may specifically be: the video information of 1000 bytes is divided into 6 sub-video information, the first 5 sub-video information is 188 bytes, and the 6 th sub-video information is 60 bytes.
The multiple pieces of sub-video information are respectively encapsulated into multiple TS packets, which may specifically be: respectively packaging the first 5 sub-video information with 188 bytes into a plurality of TS data packets, supplementing 128 supplementary bytes to the 6 th sub-video information, wherein the supplemented 6 th sub-video information also has 188 bytes, namely ensuring that each TS data packet meets the preset format condition.
Therefore, the plurality of TS packets includes a target TS packet, that is, a TS packet corresponding to the 6 th sub-video information, and the target TS packet includes complementary bytes for satisfying the preset format condition.
Step 140 is involved.
And sending the plurality of TS data packets to a client for the client to analyze the plurality of TS data packets, determining the time stamp of each video frame, and generating a target video with a preset time sequence relation according to the time stamp of each video frame and the plurality of video frames.
After sending the multiple TS packets to the client, the client may parse the multiple TS packets to obtain PES packets encapsulated with video information, where the video information includes: the timestamp of the first of the plurality of video frames, and the timestamp difference of any two adjacent video frames of the plurality of video frames.
The client can determine the timestamp of each video frame by the timestamp of the first video frame in the plurality of video frames and the timestamp difference of any two adjacent video frames in the plurality of video frames. The timestamp of each video frame can indicate the preset time sequence relation of a plurality of video frames, so that the client can generate the target video with the preset time sequence relation according to the timestamp of each video frame and the plurality of video frames.
In summary, in the embodiment of the present invention, by acquiring the video information, the video information at least includes: the video processing method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the video frames, and a timestamp difference value of any two adjacent video frames in the video frames; the video information is encapsulated into PES packets. Here, by encapsulating a plurality of video frames into one PES packet, in the subsequent process of encapsulating the PES packet into a plurality of TS packets based on the preset format condition, the occurrence of the target TS packet is greatly reduced, thereby reducing the supplementary bytes for being encapsulated into the target TS packet in satisfaction of the preset format condition. And finally, sending the plurality of TS data packets to a client for the client to analyze the plurality of TS data packets, wherein the preset time sequence relation of the plurality of video frames included in the PES data packets can be clearly indicated due to the timestamp of the first video frame in the plurality of video frames and the timestamp difference value of any two adjacent video frames in the plurality of video frames, namely the client can determine the timestamp of each video frame, so that the client can generate the target video with the preset time sequence relation according to the timestamp of each video frame and the plurality of video frames. Therefore, under the condition that the video frame can be effectively analyzed, the storage resource and the transmission resource can be saved.
Fig. 2 is a flowchart of a data parsing method according to an embodiment of the present invention;
as shown in fig. 2, the data parsing method may include steps 210 to 240, which are applied to a client, and are specifically as follows:
in step 210, the received multiple TS packets are downloaded.
And receiving the plurality of TS data packets sent by the server, and downloading the received plurality of TS data packets.
The client can parse a plurality of TS data packets to obtain PES data packets encapsulated with video information. The step of determining the PES packet according to the plurality of TS packets, where the TS packet corresponds to the identification information, may specifically include:
and determining a TS data packet corresponding to the audio frame and a TS data packet corresponding to the video frame from the received initial TS data packets according to the identification information. Then, a PES packet corresponding to the audio frame is generated according to the TS packet corresponding to the audio frame. And generating a PES (transport stream) data packet corresponding to the video frame according to the TS data packet corresponding to the video frame.
The PES data packet corresponding to the video frame comprises: the timestamp of the first of the plurality of video frames, and the timestamp difference of any two adjacent video frames of the plurality of video frames.
In a possible embodiment, before step 220, the following steps may be further included:
determining a first data packet and a second data packet from the received initial TS data packets according to the identification information; the initial TS data packet corresponds to the identification information, and the identification information is used for indicating the encapsulation content in the initial TS data packet;
analyzing the first data packet and the second data packet to obtain a PAT and a PMT; the first data packet corresponds to first identification information, the first identification information is used for indicating that the first data packet is packaged with the PAT, the second data packet corresponds to second identification information, and the second identification information is used for indicating that the second data packet is packaged with the PMT; the PAT and the PMT comprise identification information corresponding to a plurality of TS data packets;
a plurality of TS packets are determined from the initial TS packet based on the PAT and the PMT.
Wherein, the initial TS data packet includes: the initial TS data packet encapsulated with the audio frame, the initial TS data packet encapsulated with the video frame and the initial TS data packet encapsulated with the PAT and the PMT are the TS data packets involved in the embodiment of the invention.
Wherein the identification information is used to indicate the encapsulated content in the initial TS packet. The first identification information is used for indicating that the PAT is packaged in the first data packet, and the second identification information is used for indicating that the PMT is packaged in the second data packet; the PAT and PMT include identification information corresponding to a plurality of TS packets. For example, the first identification information is 0, and is used to indicate that the PAT is encapsulated in the first data packet.
So that the first data packet and the second data packet can be determined from the received initial TS data packet according to the identification information; the PAT includes identification information of a second data packet corresponding to the PMT, the second data packet is determined from the received initial TS data packet according to the identification information of the data packet corresponding to the PMT, and the second data packet is analyzed to obtain the PMT.
The PAT and the PMT include identification information corresponding to a plurality of TS packets, and therefore, a plurality of TS packets can be determined from the initial TS packets based on the PAT and the PMT.
When a PES packet of a video is parsed, in addition to normal parsing according to the encapsulation syntax of the TS and the PES, the number of video frames, the timestamp of a first video frame of a plurality of video frames, and the timestamp difference of any two adjacent video frames of the plurality of video frames, which are defined in a preset storage location (PES _ private _ data or SEI), need to be parsed, and then the DTS and PTS of the plurality of video frames encapsulated in the same PES packet are calculated.
Illustratively, the plurality of video frames are 4 frames, the timestamp of the first video frame is 0.1 second, and the timestamp difference of any two adjacent video frames is 0.1 second, and 0.1 second, respectively. The time stamp of each video frame can be determined to be 0.1 second, 0.2 second, 0.3 second, and 0.4 second, respectively.
And 240, generating a target video with a preset time sequence relation according to the timestamp of each video frame and the plurality of video frames.
Since the timestamp of each video frame can indicate the preset time sequence relation of a plurality of video frames, the client can generate the target video with the preset time sequence relation according to the timestamp of each video frame and the plurality of video frames.
In summary, in the embodiment of the present invention, a plurality of received TS packets are downloaded; determining a PES packet based on the plurality of TS packets, the PES packet containing video information, the video information comprising: the timestamp of the first of the plurality of video frames, and the timestamp difference of any two adjacent video frames of the plurality of video frames. Due to the timestamp of the first video frame in the multiple video frames and the timestamp difference of any two adjacent video frames in the multiple video frames, the preset time sequence relationship of the multiple video frames included in the PES packet can be clearly indicated, that is, the client can determine the timestamp of each video frame according to the timestamp of the first video frame in the multiple video frames and the timestamp difference of any two adjacent video frames in the multiple video frames. And then, generating a target video with a preset time sequence relation according to the time stamp of each video frame and the plurality of video frames. Thus, the video frames in the PES packet can be efficiently analyzed, and the target video can be generated quickly and accurately.
Based on the data encapsulation method shown in fig. 1, an embodiment of the present invention further provides a data encapsulation apparatus, as shown in fig. 3, where the data encapsulation apparatus 300 may include:
an obtaining module 310, configured to obtain video information, where the video information at least includes: the video coding method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the plurality of video frames, and a timestamp difference value of any two adjacent video frames in the plurality of video frames.
And an encapsulating module 320 for encapsulating the video information into packetized elementary stream PES packets.
The encapsulating module 320 is further configured to encapsulate the PES packet into a plurality of TS packets based on the preset format condition, where the plurality of TS packets includes a target TS packet, and the target TS packet includes a supplemental byte, where the supplemental byte is used to satisfy the preset format condition.
The sending module 330 is configured to send the multiple TS packets to the client, so that the client parses the multiple TS packets, determines a timestamp of each video frame, and generates a target video with a preset time sequence relationship according to the timestamp of each video frame and the multiple video frames.
In one possible embodiment, the storage location in the PES packet is a preset data storage location defined in the PES syntax.
In one possible embodiment, the data encapsulation apparatus 300 may further include:
a first determining module for determining a key video frame from a plurality of video frames;
the encapsulating module 320 is further configured to encapsulate the program association table PAT and the program map table PMT into the PES packet, where a first storage location of the PAT and the PMT in the PES packet is adjacent to a second storage location of the key video frame in the PES packet, and a resolution time corresponding to data at the first storage location is earlier than a resolution time corresponding to data at the second storage location.
In a possible embodiment, the encapsulation module 320 is specifically configured to:
splitting video information in the PES data packet into a plurality of pieces of sub-video information based on a preset byte number; the plurality of sub video information is encapsulated into a plurality of TS packets, respectively.
In summary, in the embodiment of the present invention, by acquiring the video information, the video information at least includes: the video processing method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the video frames, and a timestamp difference value of any two adjacent video frames in the video frames; the video information is encapsulated into PES packets. Here, by encapsulating a plurality of video frames into one PES packet, in the subsequent process of encapsulating PES packets into a plurality of TS packets based on the preset format condition, the occurrence of target TS packets is greatly reduced, thereby reducing the supplementary bytes for being encapsulated into the target TS packets in satisfaction of the preset format condition. And finally, sending the plurality of TS data packets to a client for the client to analyze the plurality of TS data packets, wherein the preset time sequence relation of the plurality of video frames included in the PES data packets can be clearly indicated due to the timestamp of the first video frame in the plurality of video frames and the timestamp difference value of any two adjacent video frames in the plurality of video frames, namely the client can determine the timestamp of each video frame, so that the client can generate the target video with the preset time sequence relation according to the timestamp of each video frame and the plurality of video frames. Therefore, under the condition of ensuring that the video frame can be effectively analyzed, the storage resource and the transmission resource can be saved.
Based on the data parsing method shown in fig. 2, an embodiment of the present invention further provides a data parsing apparatus, as shown in fig. 4, where the data parsing apparatus 400 may include:
a downloading module 410, configured to download the received multiple TS packets.
A determining module 420, configured to determine a PES packet according to a plurality of TS packets, where the PES packet contains video information, and the video information includes: the timestamp of the first of the plurality of video frames, and the timestamp difference of any two adjacent video frames of the plurality of video frames.
The determining module 420 is further configured to determine a timestamp of each video frame according to the timestamp of the first video frame in the plurality of video frames and a timestamp difference of any two adjacent video frames in the plurality of video frames.
And a generating module 430, configured to generate a target video with a preset time sequence relationship according to the timestamp of each video frame and the plurality of video frames.
In a possible embodiment, the determining module 420 is specifically configured to determine, according to the identification information, a first data packet and a second data packet from the received initial TS data packet; the initial TS packet corresponds to identification information indicating the encapsulated content in the initial TS packet.
The data analysis apparatus 400 may further include:
the analysis module is used for analyzing the first data packet and the second data packet to obtain the PAT and the PMT; the first data packet corresponds to first identification information, the first identification information is used for indicating that the PAT is packaged in the first data packet, the second data packet corresponds to second identification information, and the second identification information is used for indicating that the PMT is packaged in the second data packet; the PAT and PMT include identification information corresponding to a plurality of TS packets.
The determining module 420 is further configured to determine a plurality of TS packets from the initial TS packet according to the PAT and the PMT.
In summary, in the embodiment of the present invention, a plurality of received TS packets are downloaded; determining a PES packet based on the plurality of TS packets, the PES packet containing video information, the video information comprising: the timestamp of the first of the plurality of video frames, and the timestamp difference of any two adjacent video frames of the plurality of video frames. Due to the timestamp of the first video frame in the multiple video frames and the timestamp difference of any two adjacent video frames in the multiple video frames, the preset time sequence relationship of the multiple video frames included in the PES packet can be clearly indicated, that is, the client can determine the timestamp of each video frame according to the timestamp of the first video frame in the multiple video frames and the timestamp difference of any two adjacent video frames in the multiple video frames. And then, generating a target video with a preset time sequence relation according to the time stamp of each video frame and the plurality of video frames. Thus, the video frames in the PES packet can be efficiently analyzed, and the target video can be generated quickly and accurately.
An embodiment of the present invention further provides an electronic device, as shown in fig. 5, including a processor 601, a communication interface 602, a memory 603, and a communication bus 604, where the processor 601, the communication interface 602, and the memory 603 complete mutual communication through the communication bus 604,
a memory 603 for storing a computer program;
the processor 601 is configured to implement the following steps when executing the program stored in the memory 603:
acquiring video information, wherein the video information at least comprises: the video processing method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the video frames, and a timestamp difference value of any two adjacent video frames in the video frames; packaging the video information into a PES (packetized elementary stream) data packet; packaging the PES data packet into a plurality of TS data packets based on a preset format condition, wherein the plurality of TS data packets comprise a target TS data packet, the target TS data packet comprises supplementary bytes, and the supplementary bytes are used for meeting the preset format condition; and sending the TS data packets to a client for the client to analyze the TS data packets, determining the time stamp of each video frame, and generating a target video with the preset time sequence relation according to the time stamp of each video frame and the video frames.
The communication bus mentioned in the above terminal may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the terminal and other devices.
The Memory may include a Random Access Memory (RAM) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
In yet another embodiment of the present invention, a computer-readable storage medium is further provided, which has instructions stored therein, and when the computer-readable storage medium runs on a computer, the computer is caused to execute the data packaging method described in any of the above embodiments.
In yet another embodiment, the present invention further provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the data encapsulation method of any of the above embodiments.
In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to be performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A data encapsulation method is applied to a server, and the method comprises the following steps:
acquiring video information, wherein the video information at least comprises: the video processing method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the video frames, and a timestamp difference value of any two adjacent video frames in the video frames;
packaging the video information into a Packetized Elementary Stream (PES) data packet;
packaging the PES data packets into a plurality of transport stream TS data packets based on a preset format condition, wherein the plurality of TS data packets comprise a target TS data packet, the target TS data packet comprises supplementary bytes, and the supplementary bytes are used for meeting the preset format condition;
and sending the TS data packets to a client for the client to analyze the TS data packets, determining the time stamp of each video frame, and generating a target video with the preset time sequence relation according to the time stamp of each video frame and the video frames.
2. The method of claim 1, wherein the number of video frames, the timestamp of the first video frame in the plurality of video frames, and the timestamp difference of any two adjacent video frames in the plurality of video frames are stored in the PES packet at predetermined data storage locations defined in the PES syntax.
3. The method of claim 1, wherein before the encapsulating the PES packet into a plurality of TS packets based on the preset format condition, the method further comprises:
determining a key video frame from the plurality of video frames;
and encapsulating a program association table PAT and a program mapping table PMT into the PES data packet, wherein a first storage position of the PAT and the PMT in the PES data packet is adjacent to a second storage position of the key video frame in the PES data packet, and a resolution time corresponding to data at the first storage position is earlier than a resolution time corresponding to data at the second storage position.
4. The method of claim 1, wherein the encapsulating the PES packets into a plurality of transport stream TS packets based on preset format conditions comprises:
splitting video information in the PES data packet into a plurality of pieces of sub-video information based on a preset byte number;
and respectively packaging the plurality of sub-video information into the plurality of TS data packets.
5. A data parsing method is applied to a client, and the method comprises the following steps:
downloading the received TS data packets;
determining a PES packet based on the plurality of TS packets, the PES packet containing video information, the video information comprising: a plurality of video frames, a timestamp of a first video frame of the plurality of video frames, and a timestamp difference of any two adjacent video frames of the plurality of video frames;
determining a timestamp of each video frame according to a timestamp of a first video frame in the plurality of video frames and a timestamp difference of any two adjacent video frames in the plurality of video frames;
and generating a target video with a preset time sequence relation according to the timestamp of each video frame and the plurality of video frames.
6. The method of claim 5, wherein prior to said determining PES packets from said plurality of TS packets, said method further comprises:
determining a first data packet and a second data packet from the received initial TS data packets according to the identification information; the initial TS data packet corresponds to the identification information, and the identification information is used for indicating the encapsulation content in the initial TS data packet;
analyzing the first data packet and the second data packet to obtain a PAT and a PMT; the first data packet corresponds to first identification information, the first identification information is used for indicating that the PAT is packaged in the first data packet, the second data packet corresponds to second identification information, and the second identification information is used for indicating that the PMT is packaged in the second data packet; the PAT and the PMT comprise identification information corresponding to the TS data packets;
and determining the plurality of TS data packets from the initial TS data packets according to the PAT and the PMT.
7. A data encapsulation apparatus, applied to a server, the apparatus comprising:
an obtaining module, configured to obtain video information, where the video information at least includes: the video processing method comprises the steps of obtaining a plurality of video frames with a preset time sequence relation, a timestamp of a first video frame in the video frames, and a timestamp difference value of any two adjacent video frames in the video frames;
the packaging module is used for packaging the video information into a PES (packetized elementary stream) data packet;
the encapsulating module is further configured to encapsulate the PES packet into a plurality of TS packets based on a preset format condition, where the plurality of TS packets include a target TS packet, the target TS packet includes a supplemental byte, and the supplemental byte is used to meet the preset format condition;
and the sending module is used for sending the TS data packets to a client so that the client can analyze the TS data packets, determine the time stamp of each video frame, and generate the target video with the preset time sequence relation according to the time stamp of each video frame and the video frames.
8. A data parsing apparatus, applied to a client, the apparatus comprising:
the download module is used for downloading the received TS data packets;
a determining module, configured to determine a PES packet according to the plurality of TS packets, where the PES packet contains video information, and the video information includes: a plurality of video frames, a timestamp of a first video frame in the plurality of video frames, and a timestamp difference of any two adjacent video frames in the plurality of video frames;
the determining module is further configured to determine a timestamp of each of the video frames according to a timestamp of a first video frame in the plurality of video frames and a timestamp difference of any two adjacent video frames in the plurality of video frames;
and the generating module is used for generating a target video with a preset time sequence relation according to the timestamp of each video frame and the plurality of video frames.
9. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any of claims 1-6 when executing a program stored in the memory.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-6.
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