CN108737874A - A kind of video broadcasting method and electronic equipment - Google Patents
A kind of video broadcasting method and electronic equipment Download PDFInfo
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- CN108737874A CN108737874A CN201810568857.1A CN201810568857A CN108737874A CN 108737874 A CN108737874 A CN 108737874A CN 201810568857 A CN201810568857 A CN 201810568857A CN 108737874 A CN108737874 A CN 108737874A
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 230000006870 function Effects 0.000 description 12
- 238000004590 computer program Methods 0.000 description 5
- 239000000872 buffer Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 230000005291 magnetic effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4342—Demultiplexing isochronously with video sync, e.g. according to bit-parallel or bit-serial interface formats, as SDI
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
- H04N21/4398—Processing of audio elementary streams involving reformatting operations of audio signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
Present disclose provides a kind of video broadcasting method and electronic equipments, and for being played any one time point since video, method includes：Obtain the time point for playing video；Video data packet in video is decoded, judges whether the timestamp corresponding to decoded video data is more than or equal to time point, if so, the video data is added in video queue；Packets of audio data in video is decoded, judges whether the timestamp corresponding to decoded audio data is more than or equal to time point, if so, the audio data is added in audio queue；Broadcasting is synchronized to the data in video queue and audio queue sequentially in time.The disclosure can be played accurately since video any one time point in time, solve the problems, such as that the playing progress bar that the prior art occurs retracts.
Description
Technical field
This disclosure relates to a kind of video broadcasting method and electronic equipment, for being broadcast any one time point since video
It puts.
Background technology
User when watching video, may not ground from the beginning video is played, but to video progress program request, example
Such as, user pulls the time shaft in broadcast interface, to be played out at specific time point.However, being carried out at present to video
When program request (such as carrying out program request in WEB page, the mobile terminals iOS, android mobile terminal), it may appear that such case：If by video
When navigating in the 5th second, after positioning, video was played since the 0th second time；When navigating to the 9th second,
Video is still played since the 0th second；When navigating to the 10th second, video is then normally played since the 10th second；And work as
It when navigating to 19 seconds, is still played since the 10th second, to will produce the phenomenon that a kind of playing progress rate retracts, (user clicks
When specific time point, broadcasts progress bar and navigate to the point, the deadline positioning of player inside, time point when starting to play is but
Less than the time point that user clicks, player progress bar is repositioned to the position for starting to play, to progress bar rollback occur
The phenomenon that).
The reason of the above situation occur is, when carrying out timi requirement to video (for example, H264 videos), inside player all
It can will be in the video location a to key frame images nearest with specified positioning time.Assuming that when user carries out timi requirement
Time be seekTime (as unit of millisecond), inside player after deadline positioning, the first frame figure that decodes
The time of picture is firstVideoTime (as unit of millisecond).When carrying out timi requirement inside player, if should
H264 picture frames corresponding to the seekTime times, exactly a key frame, then after the completion of positioning, firstVideoTime
It is equal to seekTime, then it is identical to start the time that the time played specifies with user after the completion of positioning.And work as
H264 picture frames corresponding to the seekTime times, when not being a key frame, player (can be less than the side seekTime forward
To) finding a key frame nearest with seekTime, it is assumed that the timestamp of the key frame is keyFrameTime, is decoded in this way
First frame video time firstVideoTime out must be equal to keyFrameTime, but be less than seekTime.The two
Between difference seekTime-keyFrameTime it is bigger, video playing progress bar retract the phenomenon that it is more apparent.
Invention content
The disclosure in view of the above problems, provides a kind of video broadcasting method and electronic equipment, can accurately carry out video
Program request is accurately played since video any one time point in time.
An aspect of this disclosure provides a kind of video broadcasting method, for being broadcast any one time point since video
It puts, method includes：Obtain the time point for playing the video；Video data packet in the video is decoded, judges to solve
Whether the timestamp corresponding to video data after code is more than or equal to the time point, if so, the video data is added to
In video queue；Packets of audio data in the video is decoded, judges the time corresponding to decoded audio data
Whether stamp is more than or equal to the time point, if so, the audio data is added in audio queue；Sequentially in time to institute
It states the data in video queue and audio queue and synchronizes broadcasting.
Optionally, method further includes：The video data at the time point is less than to timestamp and audio data is deleted.
Optionally, after obtaining the time point for playing the video, further include：Obtain the data packet in the video；Sentence
The data packet of breaking is video data packet or packets of audio data；If the data packet is video data packet, by the video data
Packet is added in video data packet queue, if the data packet is packets of audio data, which is added to audio
In data packet queue.
Optionally, the video data packet in the video is decoded, including：It obtains in the video data packet queue
First video data packet；The video data packet is removed from the video data packet queue；To the video data of acquisition
Packet is decoded.
Optionally, the packets of audio data in the video is decoded, including：It obtains in the packets of audio data queue
First packets of audio data；The packets of audio data is removed from the packets of audio data queue；To the audio data of acquisition
Packet is decoded.
On the other hand the disclosure provides a kind of electronic equipment, including：Display, for showing the video played；Processing
Device；Memory is stored with computer executable program, and the program by the processor when being executed so that the processor
It executes：Obtain the time point for playing the video；Video data packet in the video is decoded, judges decoded regard
Whether frequency is more than or equal to the time point according to corresponding timestamp, if so, the video data is added to video queue
In；Packets of audio data in the video is decoded, judges whether the timestamp corresponding to decoded audio data is big
In equal to the time point, if so, the audio data is added in audio queue；Sequentially in time to the video team
Data in row and audio queue synchronize broadcasting.
Optionally, processor also executes：The video data at the time point is less than to timestamp and audio data is deleted
It removes.
Optionally, it after the processor executes the time point for obtaining the broadcasting video, also executes：Obtain the video
In data packet；Judge the data packet for video data packet or packets of audio data；If the data packet is video data packet,
The video data packet is added in video data packet queue, if the data packet is packets of audio data, by the audio data
Packet is added in packets of audio data queue.
Optionally, the processor is decoded the video data packet in the video, including：Obtain the video counts
According to first video data packet in packet queue；The video data packet is removed from the video data packet queue；To obtaining
Video data packet be decoded.
Optionally, the processor is decoded the packets of audio data in the video, including：Obtain the audio number
According to first packets of audio data in packet queue；The packets of audio data is removed from the packets of audio data queue；To obtaining
Packets of audio data be decoded.
Description of the drawings
In order to which the disclosure and its advantage is more fully understood, referring now to being described below in conjunction with attached drawing, wherein：
Fig. 1 diagrammatically illustrates the video broadcasting method flow chart of embodiment of the present disclosure offer.
Fig. 2 diagrammatically illustrates the block diagram of the electronic equipment according to the disclosure.
Specific implementation mode
According in conjunction with attached drawing to the described in detail below of disclosure exemplary embodiment, other aspects, the advantage of the disclosure
Those skilled in the art will become obvious with prominent features.
In the disclosure, term " comprising " and " containing " and its derivative mean including and it is unrestricted；Term "or" is packet
Containing property, mean and/or.
In the present specification, following various embodiments for describing disclosure principle only illustrate, should not be with any
Mode is construed to limitation scope of disclosure.With reference to attached drawing the comprehensive understanding described below that is used to help by claim and its equivalent
The exemplary embodiment for the disclosure that object limits.It is described below to help to understand including a variety of details, but these details are answered
Think to be only exemplary.Therefore, it will be appreciated by those of ordinary skill in the art that without departing substantially from the scope of the present disclosure and spirit
In the case of, embodiment described herein can be made various changes and modifications.In addition, for clarity and brevity,
The description of known function and structure is omitted.In addition, running through attached drawing, same reference numbers are used for identity function and operation.
Fig. 1 diagrammatically illustrates the video broadcasting method flow chart of embodiment of the present disclosure offer.
As described in Figure 1, video broadcasting method includes following operation：
S1 obtains the time point for playing video.
In above-mentioned steps, the selection at time point can come from user's operation, for example, user is when watching video, manually
The time shaft in video clip is pulled, video is played out with the time point for being intended to want from user.Specifically obtaining from internal system
From the point of view of taking mode, system generally has audio/video decoding module, such as generally has MediaDecoder moulds in pc client
Block is as audio/video decoding module.Wherein, MediaDecoder modules include that there are one seek methods, are played when the user clicks
When device playing progress bar carries out timi requirement, the seek methods, this method can be called to receive one as unit of millisecond event
Time value, be labeled as seekTime, then call av_seek_frame functions, to the video carry out timi requirement.Wherein,
The required chronomere of av_seek_frame functions is gsec, is transmitted to so needing seekTime being multiplied by 1000
In the relevant parameter of the function, and set the last one parameter to AVSEEK_FLAG_BACKWARD.Av_seek_frame letters
After number returns, judging whether its return value is equal to 0, if being equal to 0, then it is assumed that time point obtains successfully, otherwise, this time point
Obtain failure.
S2 initializes Video Decoder and audio decoder.
In aforesaid operations, need the data in current Video Decoder and audio decoder being restored to initial shape
State represents Video Decoder in the disclosure with m_videoCodec variables, and type is AVCodecContext structures, with m_
AudioCodec variables represent audio decoder, and type is similarly AVCodecContext.In initialization procedure, call
M_videoCodec is passed in the function parameter by avcodec_flush_buffers functions, to reset video decoding
Device；Avcodec_flush_buffers functions are called, m_audioCodec are passed in the function parameter, to reset sound
Frequency decoder.
S3 establishes video data packet queue and packets of audio data queue.
In aforesaid operations, the data extractor thread DemuxerThread recursive calls av_read_frame in system
Function, to obtain not decoded data packet AVPacket in video；Next, it is determined that the data packet is video data packet or audio
Data packet；If the data packet is video data packet, which is added to video data packet queue m_
In videoPacketList, if the data packet is packets of audio data, which is added to packets of audio data team
It arranges in m_audioPacketList.
S4 is decoded the video data packet in video, judges that the timestamp corresponding to decoded video data is
It is no to be more than or equal to the time point, if so, the video data is added in video queue.
In aforesaid operations, the video decoding thread VideoDecodeThread in system is recycled to video data packet team
Video bag AVPacket in row m_videoPacketList is decoded.Specifically, VideoDecodeThread judgements regard
Whether frequency data packet queue m_videoPacketList is empty, if so, any operation is not done, otherwise, from video data packet team
It arranges and obtains first video bag in m_videoPacketList, and by the video bag from video data packet queue m_
It is removed in videoPacketList；Then, the avcodec_decode_video2 in VideoDecodeThread calling systems
The above-mentioned video bag AVPacket of function pair is decoded.
After above-mentioned successfully decoded, the structure of an AVFrame can be obtained, which represents a decoded video
Frame, and the timestamp of the best_effort_time field references video frame in the structure, are converted into a millisecond unit
Afterwards, compare whether it is more than or equal to time point seekTime, be if it is saved into video queue m_
In decodedVideoFrame.Take the lead in explanation, and it is from video queue m_ that subsequent video, which is shown,
An AVFrame is obtained in decodedVideoFrame to be shown.
S5 is decoded the packets of audio data in video, judges that the timestamp corresponding to decoded audio data is
It is no to be more than or equal to the time point, if so, the audio data is added in audio queue.
In aforesaid operations, the audio decoder thread AudioDecodeThread in system is recycled to packets of audio data team
Audio pack AVPacket in row m_audioPacketList is decoded.Specifically, audio decoder thread
Whether AudioDecodeThread audio data packet queues m_audioPacketList is empty, if so, not doing any
Operation, otherwise, from packets of audio data queue m_audioPacketList obtain first video bag, and by the audio pack from
It is removed in packets of audio data queue m_audioPacketList；Then, in AudioDecodeThread calling systems
The above-mentioned audio pack AVPacket of avcodec_decode_audio4 function pairs is decoded.
After above-mentioned successfully decoded, the structure of an AVFrame can be obtained, which represents a decoded audio and broadcast
It puts data, and the timestamp of the best_effort_time field references video frame in the structure, is converted into millisecond
After unit, compare whether it is more than or equal to time point seekTime, is if it is saved into audio queue m_
In decodedAudioFrame.Take the lead in explanation, and subsequent audio broadcasting is from audio queue m_
An AVFrame is obtained in decodedAudioFrame to play out.
It needs to stress, in aforesaid operations S4 and S5, for the video data or audio data decoded, if
Its corresponding timestamp is less than time point seekTime, then deletes the video data or audio data, i.e., is carried out to those data
It abandons, with releasing memory.
S6 synchronizes broadcasting to the data in video queue and audio queue sequentially in time.
In above-mentioned steps, it is contemplated that the video data and audio data decoded is to correspond in time
, so when playing, corresponding video data and audio data are time-synchronously played same, to reach sound and picture
Synchronous effect.
In conclusion the video broadcasting method of the embodiment of the present disclosure, obtains the time point that specified needs play first
Then seekTime is respectively decoded video and audio, when decoded video time videoTime or audio time
When audioTime is less than time point seekTime, these videos or audio are all abandoned, until video time decoded
When videoTime and audio time audioTime is more than or equal to seekTime, just start to play.In this way so that when specified
Between the video and audio at point seekTime and time point later can access decoding, and can accurately point at the appointed time
SeekTime is played out, when solving progress timi requirement in the prior art, because key frame is too many less than positioning time, and
The problem of playing progress bar of appearance retracts.
Fig. 2 diagrammatically illustrates the block diagram of the electronic equipment according to the disclosure.
As shown in Fig. 2, electronic equipment 200 includes processor 210, computer readable storage medium 220 and display 230.
The electronic equipment 200 can execute the method described above with reference to Fig. 1, accurately to carry out video on demand.
Specifically, processor 210 for example may include general purpose microprocessor, instruction set processor and/or related chip group
And/or special microprocessor (for example, application-specific integrated circuit (ASIC)), etc..Processor 210 can also include being used for caching
The onboard storage device on way.Processor 310 can be performed for the method flow according to the embodiment of the present disclosure described with reference to figure 1
Different actions single treatment units either multiple processing units.
Computer readable storage medium 220, such as can include, store, transmitting, propagating or transmitting appointing for instruction
Meaning medium.For example, readable storage medium storing program for executing can include but is not limited to electricity, magnetic, optical, electromagnetic, infrared or semiconductor system, device,
Device or propagation medium.The specific example of readable storage medium storing program for executing includes：Magnetic memory apparatus, such as tape or hard disk (HDD)；Optical storage
Device, such as CD (CD-ROM)；Memory, such as random access memory (RAM) or flash memory；And/or wire/wireless communication chain
Road.
Computer readable storage medium 220 may include computer program 221, which may include generation
Code/computer executable instructions make that the execution of processor 310 is for example retouched above in conjunction with Fig. 1 when being executed by processor 210
The method flow stated and its any deformation.
Computer program 221 can be configured with such as computer program code including computer program module.Example
Such as, in the exemplary embodiment, the code in computer program 221 may include one or more program modules, such as including
221A, module 221B ....It should be noted that the dividing mode and number of module are not fixed, those skilled in the art can
To be combined using suitable program module or program module according to actual conditions, when these program modules are combined by processor 210
When execution so that processor 210 can execute for example above in conjunction with method flow described in Fig. 1 and its any deformation.
Although the disclosure, art technology has shown and described with reference to the certain exemplary embodiments of the disclosure
Personnel it should be understood that in the case of the spirit and scope of the present disclosure limited without departing substantially from the following claims and their equivalents,
A variety of changes in form and details can be carried out to the disclosure.Therefore, the scope of the present disclosure should not necessarily be limited by above-described embodiment,
But should be not only determined by appended claims, also it is defined by the equivalent of appended claims.
Claims (10)
1. a kind of video broadcasting method, for being played any one time point since video, method includes：
Obtain the time point for playing the video；
Video data packet in the video is decoded, judges whether the timestamp corresponding to decoded video data is big
In equal to the time point, if so, the video data is added in video queue；
Packets of audio data in the video is decoded, judges whether the timestamp corresponding to decoded audio data is big
In equal to the time point, if so, the audio data is added in audio queue；
Broadcasting is synchronized to the data in the video queue and audio queue sequentially in time.
2. video broadcasting method according to claim 1, further includes：
The video data at the time point is less than to timestamp and audio data is deleted.
3. video broadcasting method according to claim 1, wherein after obtaining the time point for playing the video, also wrap
It includes：
Obtain the data packet in the video；
Judge the data packet for video data packet or packets of audio data；
If the data packet is video data packet, which is added in video data packet queue, if the number
It is packets of audio data according to packet, then the packets of audio data is added in packets of audio data queue.
4. video broadcasting method according to claim 3, wherein the video data packet in the video is decoded,
Including：
Obtain first video data packet in the video data packet queue；
The video data packet is removed from the video data packet queue；
The video data packet of acquisition is decoded.
5. video broadcasting method according to claim 3, wherein the packets of audio data in the video is decoded,
Including：
Obtain first packets of audio data in the packets of audio data queue；
The packets of audio data is removed from the packets of audio data queue；
The packets of audio data of acquisition is decoded.
6. a kind of electronic equipment, including：
Display, for showing the video played；
Processor；
Memory is stored with computer executable program, and the program by the processor when being executed so that the processor
It executes：
Obtain the time point for playing the video；
Video data packet in the video is decoded, judges whether the timestamp corresponding to decoded video data is big
In equal to the time point, if so, the video data is added in video queue；
Packets of audio data in the video is decoded, judges whether the timestamp corresponding to decoded audio data is big
In equal to the time point, if so, the audio data is added in audio queue；
Broadcasting is synchronized to the data in the video queue and audio queue sequentially in time.
7. electronic equipment according to claim 6, the processor also executes：
The video data at the time point is less than to timestamp and audio data is deleted.
8. electronic equipment according to claim 6, after the processor executes the time point for obtaining the broadcasting video,
Also execute：
Obtain the data packet in the video；
Judge the data packet for video data packet or packets of audio data；
If the data packet is video data packet, which is added in video data packet queue, if the number
It is packets of audio data according to packet, then the packets of audio data is added in packets of audio data queue.
9. electronic equipment according to claim 8, the processor is decoded the video data packet in the video,
Including：
Obtain first video data packet in the video data packet queue；
The video data packet is removed from the video data packet queue；
The video data packet of acquisition is decoded.
10. electronic equipment according to claim 8, the processor solves the packets of audio data in the video
Code, including：
Obtain first packets of audio data in the packets of audio data queue；
The packets of audio data is removed from the packets of audio data queue；
The packets of audio data of acquisition is decoded.
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| CN201810568857.1A CN108737874A (en) | 2018-06-05 | 2018-06-05 | A kind of video broadcasting method and electronic equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109218795A (en) * | 2018-11-29 | 2019-01-15 | 青岛海信电器股份有限公司 | A kind of more device plays progress synchronous method, device and terminal device |
| CN109788224A (en) * | 2019-03-26 | 2019-05-21 | 歌尔科技有限公司 | Video recording method, device, network shooting device and storage medium |
| CN110418186A (en) * | 2019-02-01 | 2019-11-05 | 腾讯科技（深圳）有限公司 | Audio and video playing method, apparatus, computer equipment and storage medium |
| CN111225263A (en) * | 2020-01-17 | 2020-06-02 | 广州虎牙科技有限公司 | Video playing control method and device, electronic equipment and storage medium |
| CN113766146A (en) * | 2021-09-07 | 2021-12-07 | 北京百度网讯科技有限公司 | Audio and video processing method and device, electronic equipment, storage medium and program product |
| CN115065860A (en) * | 2022-07-01 | 2022-09-16 | 广州美录电子有限公司 | Audio data processing method, device, equipment and medium suitable for stage |
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| CN111225263A (en) * | 2020-01-17 | 2020-06-02 | 广州虎牙科技有限公司 | Video playing control method and device, electronic equipment and storage medium |
| CN113766146A (en) * | 2021-09-07 | 2021-12-07 | 北京百度网讯科技有限公司 | Audio and video processing method and device, electronic equipment, storage medium and program product |
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