CN114666603A - Video decoding method and device, electronic equipment and storage medium - Google Patents
Video decoding method and device, electronic equipment and storage medium Download PDFInfo
- Publication number
- CN114666603A CN114666603A CN202210485315.4A CN202210485315A CN114666603A CN 114666603 A CN114666603 A CN 114666603A CN 202210485315 A CN202210485315 A CN 202210485315A CN 114666603 A CN114666603 A CN 114666603A
- Authority
- CN
- China
- Prior art keywords
- frame
- decoding
- target
- target frame
- video
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000004590 computer program Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47217—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Human Computer Interaction (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
The embodiment of the invention provides a video decoding method, a video decoding device, electronic equipment and a storage medium, wherein the video decoding method comprises the following steps: acquiring the positions of a plurality of key frames of a video to be played; when a video to be played is played at a double speed, a first target frame is obtained and decoded, a first decoding capacity is determined, and a second target frame is determined under the condition that the video belongs to a first preset range; under the condition that a key frame exists between the first target frame and the second target frame, acquiring the key frame and decoding; decoding the second target frame and determining a second decoding capability; under the condition that the video frame belongs to the first preset range, reading the next double-speed playing frame of the second target frame and decoding, and repeating the steps until the last double-speed playing frame in the double-speed playing frames completes decoding.
Description
Technical Field
The present invention relates to the field of video processing technologies, and in particular, to a video decoding method, an apparatus, an electronic device, and a storage medium.
Background
In recent years, the requirements of people on the video playing in a variable speed sequence are gradually improved, the video can be played at a high speed, and the requirements of people on the video playing effect are greatly enriched.
However, when some larger videos are played at high multiples, the video playing is jammed, and even more, the video playing is directly jammed, so that the fluency of the video playing is affected. The above problem is that, in the existing video double-speed playing mode, after all frames of all played videos are decoded, the frames are filtered through the timestamp of each frame, so for a larger video, the double-speed playing mode causes a huge calculation amount of a decoder, thereby causing a longer decoding time and unsmooth video playing.
Disclosure of Invention
The invention aims to provide a video decoding method, a video decoding device, an electronic device and a storage medium, which can shorten the time for decoding and taking frames when a video is played at a double speed so as to ensure that the video multiple playing is smoother.
In order to achieve the above purpose, the embodiments of the present application employ the following technical solutions:
in a first aspect, an embodiment of the present application provides a video decoding method, where the method includes:
acquiring the positions of a plurality of key frames of a video to be played;
when the video to be played is played at a double speed, determining each double-speed playing frame in the video to be played;
acquiring and decoding a first target frame, and determining a first decoding capacity for decoding the first target frame, wherein the first target frame is a first speed playing frame in each speed playing frame;
determining a second target frame under the condition that the first decoding capacity belongs to a first preset range, wherein the second target frame is a next double-speed playing frame of the first target frame;
under the condition that a key frame exists between the first target frame and the second target frame, acquiring the key frame based on the position of the key frame and decoding the key frame;
acquiring the second target frame for decoding, and determining a second decoding capability for decoding the second target frame;
reading and decoding the next double-speed playing frame of the second target frame under the condition that the second decoding capacity belongs to the first preset range;
and returning to execute the step of determining a second target frame when the first decoding capacity belongs to a first preset range, and reading and decoding the next double-speed playing frame of the second target frame when the second decoding capacity belongs to the first preset range until the last double-speed playing frame in the double-speed playing frames is decoded.
In an alternative embodiment, the method further comprises:
and reading and decoding a first target key frame under the condition that the first decoding capability belongs to a second preset range, wherein the first target key frame is positioned after the second target frame.
In an alternative embodiment, the step of reading and decoding the first target key frame when the first decoding capability belongs to the second preset range includes:
the determining a first display timestamp and a first timestamp of the first target frame;
calculating a first difference between the first display timestamp and the first timestamp;
determining that the first decoding capability belongs to a second preset range under the condition that the first difference is larger than a first preset threshold;
and reading and decoding a first target key frame, wherein the first target key frame is positioned behind the second target frame, and the second preset range comprises the first preset threshold.
In an alternative embodiment, the method further comprises:
determining a second display timestamp and a second timestamp of the first target keyframe;
calculating a second difference between the second display timestamp and the second timestamp;
when the second difference is greater than a second preset threshold value and the frame number of a first video to be played is less than a preset frame number, taking the first target key frame as an initial frame, and obtaining a third target frame according to a first preset playing speed, wherein the first preset playing speed is less than the playing speed of the video to be played, the first video to be played takes the first target key frame as the initial frame and takes a last tail frame of the video to be played as an end frame, the second preset threshold value is greater than the first preset threshold value, and the second preset range comprises the second preset threshold value;
decoding the third target frame.
In an optional embodiment, after the step of determining that the first decoding capability belongs to a second preset range in the case that the first difference is greater than a first preset threshold, the method further includes:
reading and decoding a second target key frame when the first difference is greater than a third preset threshold, wherein the third preset threshold is greater than the second preset threshold after the second target key frame is located behind the first target key frame, and the second preset range includes the third preset threshold;
taking the second target key frame as an initial frame, and acquiring a fourth target frame according to a second preset playing speed, wherein the second preset playing speed is less than the first preset playing speed;
decoding the fourth target frame.
In an alternative embodiment, before the step of decoding the first target frame, the method further comprises:
when the first target frame is in an h264 format, analyzing the first target frame to obtain each first data value of the first target frame;
dropping the first target frame if the nal _ ref _ idc data value in each of the first data values is zero;
when the first target frame is in a hevc format, analyzing the first target frame to obtain each second data value of the first target frame;
and in the case that the nal _ unit _ type data value in each second data value is RASL N or RASL R, discarding the first target frame.
In a second aspect, an embodiment of the present application provides a video decoding apparatus, including:
a processing module and a return execution module;
the processing module is configured to:
acquiring the positions of a plurality of key frames of a video to be played;
when the video to be played is played at a double speed, determining each double-speed playing frame in the video to be played;
acquiring and decoding a first target frame, and determining a first decoding capacity for decoding the first target frame, wherein the first target frame is a first speed playing frame in each speed playing frame;
determining a second target frame under the condition that the first decoding capacity belongs to a first preset range, wherein the second target frame is a next double-speed playing frame of the first target frame;
under the condition that a key frame exists between the first target frame and the second target frame, acquiring the key frame based on the position of the key frame and decoding the key frame;
acquiring the second target frame for decoding, and determining a second decoding capability for decoding the second target frame;
reading and decoding the next double-speed playing frame of the second target frame under the condition that the second decoding capacity belongs to the first preset range;
the return execution module is configured to return to execute the step of determining a second target frame when the first decoding capability belongs to a first preset range, and reading and decoding a next double-speed playing frame of the second target frame when the second decoding capability belongs to the first preset range until a last double-speed playing frame in the double-speed playing frames is decoded.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the video decoding method when executing the computer program.
In a fourth aspect, the present application provides a storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the steps of the video decoding method.
The application has the following beneficial effects:
the method comprises the steps of obtaining the positions of a plurality of key frames of a video to be played, determining each double-speed playing frame in the video to be played when the video to be played is played at double speed, obtaining and decoding a first target frame, determining a first decoding capacity for decoding the first target frame, wherein the first target frame is a first double-speed playing frame in each double-speed playing frame, determining a second target frame under the condition that the first decoding capacity belongs to a first preset range, wherein the second target frame is a next double-speed playing frame of the first target frame, obtaining and decoding the key frame based on the positions of the key frames under the condition that the key frames exist between the first target frame and the second target frame, obtaining and decoding a second target frame, determining a second decoding capacity for decoding the second target frame, reading and decoding the next double-speed playing frame of the second target frame under the condition that the second decoding capacity belongs to the first preset range, and returning to execute the step of determining the second target frame when the first decoding capacity belongs to the first preset range, and reading and decoding the next double-speed playing frame of the second target frame when the second decoding capacity belongs to the first preset range until the last double-speed playing frame in the double-speed playing frames finishes decoding. The method and the device can shorten the time for decoding and taking frames when the video is played at a double speed, so that the video multiple playing is smoother.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of an electronic device according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a video decoding method according to an embodiment of the present invention;
fig. 3 is a second flowchart illustrating a video decoding method according to an embodiment of the present invention;
fig. 4 is a third flowchart illustrating a video decoding method according to a third embodiment of the present invention;
fig. 5 is a fourth flowchart illustrating a video decoding method according to an embodiment of the present invention;
fig. 6 is a fifth flowchart illustrating a video decoding method according to an embodiment of the present invention;
fig. 7 is a block diagram of a video decoding apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Through a great deal of research by the inventor, the existing video double-speed playing mode filters frames through the time stamp of each frame after decoding all frames of all played videos, so that for a larger video, the double-speed playing mode causes huge calculation amount of a decoder, thereby causing longer decoding time and unsmooth video playing.
In view of the above-mentioned problems, the present embodiment provides a video decoding method, an apparatus, an electronic device, and a storage medium, which can shorten the time for decoding and fetching frames when a video is played at a double speed, so as to make the playing of video multiples smoother, and the scheme provided by the present embodiment is described in detail below.
The embodiment provides an electronic device capable of decoding videos. In one possible implementation, the electronic Device may be a user terminal, for example, the electronic Device may be, but is not limited to, a server, a smart phone, a Personal Computer (PC), a tablet computer, a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), and the like.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1. The components shown in fig. 1 may be implemented in hardware, software, or a combination thereof.
The electronic apparatus 100 includes a video decoding device 110, a memory 120, and a processor 130.
The memory 120 and the processor 130 are electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The video decoding apparatus 110 includes at least one software function module which can be stored in the memory 120 in the form of software or firmware (firmware) or solidified in an Operating System (OS) of the electronic device 100. The processor 130 is used to execute executable modules stored in the memory 120, such as software functional modules and computer programs included in the video decoding device 110.
The Memory 120 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory 120 is used for storing a program, and the processor 130 executes the program after receiving the execution instruction.
Referring to fig. 2, fig. 2 is a flowchart illustrating a video decoding method applied to the electronic device 100 of fig. 1, and the method includes various steps which will be described in detail below.
Step 201: the positions of a plurality of key frames of a video to be played are obtained.
Step 202: when the video to be played is played at double speed, each double-speed playing frame in the video to be played is determined.
Step 203: a first target frame is acquired and decoded, and a first decoding capability for decoding the first target frame is determined.
The first target frame is a first multiple-speed playing frame in each multiple-speed playing frame.
Step 204: in the case that the first decoding capability belongs to a first preset range, a second target frame is determined.
And the second target frame is the next double-speed playing frame of the first target frame.
Step 205: and under the condition that a key frame exists between the first target frame and the second target frame, acquiring the key frame based on the position of the key frame and decoding.
Step 206: and acquiring a second target frame for decoding, and determining a second decoding capability for decoding the second target frame.
Step 207: and reading and decoding the next double-speed playing frame of the second target frame under the condition that the second decoding capability belongs to the first preset range.
Step 208: and returning to execute the step of determining the second target frame when the first decoding capacity belongs to the first preset range, and reading and decoding the next double-speed playing frame of the second target frame when the second decoding capacity belongs to the first preset range until the last double-speed playing frame in the double-speed playing frames finishes decoding.
It should be noted that the video to be played may be a video obtained in real time, or may also be a video stored locally in the electronic device.
Each video to be played comprises a key frame, the key frame can represent main information of the video to be played, and the position of the key frame in the video to be played is obtained based on the ffmpeg interface. And stores the key frames and the locations of the key frames. ffmpeg is a set of open source computer programs that can be used to record, convert digital audio, video, and convert them into streams.
Illustratively, when the video to be played is played at double speed, each double-speed playing frame in the video to be played is determined, for example, when the length of the video to be played is 1 second, the frame rate is 30fps, and when the playing double speed is 8 double speed, each double-speed playing frame is the 1 st frame, the 9 th frame, the 17 th frame and the 25 th frame, the key frame position of the video to be played is the 5 th frame and the 24 th frame, when the first target frame is decoded, based on the first display timestamp and the first timestamp of the first target frame, the first decoding capability for decoding the first target frame is determined, and when the first decoding capability belongs to the first preset range, the second target frame is determined, that is, the 9 th frame is determined, a key frame exists between the 1 st frame and the 9 th frame, that is the 5 th frame, at this time, the 5 th frame is obtained and decoded, and the second target frame is determined at the same time, decoding a second target frame, determining a second decoding capacity for decoding the second target frame, namely a 9 th frame, reading a next double-speed playing frame of the second target frame for decoding when the second decoding capacity belongs to a first preset range, namely decoding the 17 th frame, then determining the decoding capacity for decoding the 17 th frame, determining the next frame of the 17 th frame, namely a 25 th frame, acquiring a key frame between the 17 th frame and the 25 th frame, namely a 24 th frame, decoding the 25 th frame when the decoding capacity belongs to the first preset range, and finally displaying and playing the 1 st frame, the 5 th frame, the 9 th frame, the 17 th frame, the 24 th frame and the 25 th frame, thereby realizing 8-speed playing of a video to be played.
Compared with the decoding mode in the prior art, the method can shorten the decoding time of the video frames, thereby ensuring the fluency of the double-speed playing video.
It should be noted that, when a double-speed playing frame is decoded each time, the current decoding capability needs to be determined, and when the decoding capability belongs to a first preset range, it indicates that the current decoding capability is sufficient, and when the decoding capability belongs to a second preset range, it indicates that the current decoding capability is insufficient, and the video cannot be normally decoded, and the first preset range is smaller than the second preset range.
In an example, the decoding capability to decode the current video frame may be determined by determining a difference between a display timestamp and a timestamp of decoding the current video frame, which may be a respective double-speed play frame or a respective key frame.
The method comprises the steps of obtaining the positions of a plurality of key frames of a video to be played, determining each double-speed playing frame in the video to be played when the video to be played is played at double speed, obtaining and decoding a first target frame, determining a first decoding capacity for decoding the first target frame, wherein the first target frame is a first double-speed playing frame in each double-speed playing frame, determining a second target frame under the condition that the first decoding capacity belongs to a first preset range, wherein the second target frame is a next double-speed playing frame of the first target frame, obtaining and decoding the key frame based on the positions of the key frames under the condition that the key frames exist between the first target frame and the second target frame, obtaining and decoding a second target frame, determining a second decoding capacity for decoding the second target frame, reading and decoding the next double-speed playing frame of the second target frame under the condition that the second decoding capacity belongs to the first preset range, and returning to the step of determining the second target frame under the condition that the first decoding capacity belongs to the first preset range and reading and decoding the next double-speed playing frame of the second target frame under the condition that the second decoding capacity belongs to the first preset range until the last double-speed playing frame in the double-speed playing frames finishes decoding. The method and the device can shorten the time for decoding and taking frames when the video is played at a double speed, so that the video multiple playing is smoother.
When the decoding capability of the first target frame is insufficient, how to decode the video is shown in fig. 3, which is a schematic flow diagram of a video decoding method provided in the embodiment of the present application, and specifically includes the following steps:
step 301: a first display timestamp and a first timestamp of the first target frame are determined.
Step 302: a first difference between the first display timestamp and the first timestamp is calculated.
Step 303: and determining that the first decoding capability belongs to a second preset range under the condition that the first difference value is larger than a first preset threshold value.
Step 304: the first target key frame is read and decoded.
The first target key frame is located behind the second target frame, and the second preset range comprises a first preset threshold.
In FFmpeg, an AVPacket structure is used to describe a compressed packet before decoding or after encoding, and an AVFrame structure is used to describe a signal frame after decoding or before encoding. For video, the AVFrame is a frame of image of the video. When the frame image is displayed to the user depends on its PTS, i.e., first time stamp. DTS, the first presentation time stamp, is a member of the AVPacket and indicates when the compressed packet should be decoded. If the encoding of frames in a video is done sequentially in the input order, the DTS and PTS should be identical. A first decoding capability to decode the current first target frame is determined based on a difference between the first display timestamp and the first timestamp.
It should be noted that, a person skilled in the art may set the second preset range according to an actual situation, where the second preset range may be 2-10ms, and determine, based on the first decoding capability for decoding the first target frame, what kind of preset rule is to be used for decoding the video frame in the video to be played. The first preset threshold may be 2ms, 3ms, 4ms, and the like, which is not particularly limited in the embodiment of the present invention. When the second preset range is 2-10ms, the first preset range may be 0-2 ms.
In an example, when each double-speed playing frame and each key frame are the 1 st frame, the 9 th frame, the 15 th frame, the 17 th frame, the 24 th frame and the 25 th frame, the 15 th frame and the 24 th frame are key frames, when the 1 st frame, that is, the first target frame, is decoded, and a first difference value between the first display timestamp and the first timestamp is greater than a first preset threshold value, it indicates that the current decoding capability is insufficient, and the first target key frame is read and decoded, that is, the 15 th frame is directly decoded. The second target frame is the 9 th frame, and the first target key frame is behind the second target frame.
When the first difference value between the first display time stamp and the first time stamp is greater than the second preset threshold value when the 1 st frame, that is, the first target frame, is decoded, it indicates that the current decoding capability is worse than the decoding capability when the first difference value is greater than the first preset threshold value, and at this time, the 24 th frame may be directly located, so as to skip the decoding of the 9 th frame, the 15 th frame and the 17 th frame.
In another example, when each double-speed playing frame and each key frame are the 1 st frame, the 5 th frame, the 9 th frame, the 17 th frame, the 24 th frame, the 25 th frame, the 33 th frame, the 40 th frame, and the 41 th frame, the 5 th frame, the 24 th frame, and the 40 th frame are key frames, and when the 1 st frame, that is, the first target frame, is decoded, and it is determined that the first difference between the current first display timestamp and the first timestamp is greater than the third preset threshold, it indicates that the current first decoding capability is worse than the decoding capability when the first difference is greater than the second preset threshold, that is, the current decoding capability is seriously insufficient, and the frame may be decoded by directly jumping to the 40 th frame after the 1 st frame is decoded.
The first preset threshold is smaller than the second preset threshold, and the second preset threshold is smaller than the third preset threshold.
When the decoding capability of decoding the first target key frame is insufficient, how to decode the video is shown in fig. 4, which is a schematic flow diagram of a video decoding method provided in an embodiment of the present application, and specifically includes the following steps:
step 401: a second display timestamp and a second timestamp of the first target keyframe are determined.
Step 402: a second difference is calculated between the second presentation time stamp and the second time stamp.
Step 403: and under the condition that the second difference value is greater than a second preset threshold value and the frame number of the first video to be played is less than a preset frame number, taking the first target key frame as an initial frame and obtaining a third target frame according to the first preset playing speed.
The first preset playing speed is lower than the playing speed of the video to be played, the first video to be played takes the first target key frame as an initial frame and takes the last tail frame of the video to be played as an end frame, the second preset threshold value is larger than the first preset threshold value, and the second preset range comprises the second preset threshold value.
Step 404: and decoding the third target frame.
And determining the current decoding capability when the first target key frame is decoded based on a second display time stamp of the first target key frame and a second difference value of the second time stamp.
In an example, the video is played at a double speed of 8 times, where when the double speed playing frame and each key frame are the 1 st frame, the 5 th frame, the 9 th frame, the 17 th frame, the 24 th frame, the 25 th frame, the 33 th frame, the 40 th frame, and the 41 th frame, the 5 th, 24 th, and 40 th frames are key frames, where the 5 th frame is a first target key frame, and when the second difference is greater than a second preset threshold, decoding of the 9 th frame and the 17 th frame may be skipped, and the 24 th frame, that is, the 24 th frame, is directly positioned for decoding.
In another example, the video is subjected to double-speed playing at 8 times, each double-speed playing frame and each key frame are the 1 st frame, the 9 th frame, the 17 th frame, the 24 th frame, the 25 th frame, the 33 rd frame, the 40 th frame and the 41 th frame, wherein the 24 th frame and the 40 th frame are key frames, wherein when the 24 th frame is a first target key frame, and when a second difference value is greater than a second preset threshold value and the frame number of the first video to be played is less than a preset frame number, the first target key frame is taken as an initial frame, and a third target frame is obtained at the first preset playing speed.
When the decoding capability of decoding the first target key frame is insufficient, and in order to ensure that the number of subsequently acquired video frames is as much as 8 frames, a third target frame is acquired at a first preset playback speed with a 24 th frame as a start frame, for example: and acquiring a third target frame at 3 times of speed, namely, taking the third target frame as a 27 th frame, and decoding the 27 th frame.
Illustratively, a plurality of third target frames are acquired at a 3-fold speed, where the third target frames are respectively a 27 th frame, a 30 th frame, a 33 rd frame, a 36 th frame, and a 39 th frame, when the 27 th frame, the 30 th frame, the 33 th frame, the 36 th frame, and the 39 th frame are decoded step by step, it is necessary to determine a decoding capability of the 27 th frame, when the decoding capability of the 27 th frame belongs to a first preset range, it is determined whether a key frame exists between the 27 th frame and the 30 th frame, if so, the 30 th frame is decoded after the key frame is decoded, and if not, the 30 th frame is decoded directly. When the decoding capability in decoding the 30 th frame belongs to the first preset range, the 33 rd frame is decoded … and the 39 th frame is decoded. Therefore, the playing fluency of the video to be played is further ensured. When the 27 th frame, the 30 th frame, the 33 rd frame, the 36 th frame and the 39 th frame are decoded step by step, if the current decoding capability is insufficient, a key frame after the current video frame is acquired, and the key frame is decoded.
As shown in fig. 5, a flow diagram of a video decoding method provided in an embodiment of the present application is a schematic flow chart of how to decode a video when a first decoding capability of decoding a first target frame is seriously insufficient, and specifically includes the following steps:
step 501: and reading and decoding the second target key frame under the condition that the first difference value is larger than a third preset threshold value.
And the second target key frame is behind the first target key frame, the third preset threshold is greater than the second preset threshold, and the second preset range comprises the third preset threshold.
Step 502: and taking the second target key frame as an initial frame, and acquiring a fourth target frame according to a second preset playing speed.
Wherein the second preset playing speed is less than the first preset playing speed.
Step 503: and decoding the fourth target frame.
It should be noted that the second preset playing speed is lower than the first preset playing speed, for example, when the first preset playing speed is 3 times, the second preset playing speed is 2 times. Therefore, the fluency of the video to be played in the double-speed playing process is ensured.
Before decoding the first target frame, the first target frame needs to be filtered, as shown in fig. 6, a flow diagram of a video decoding method provided in the embodiment of the present application specifically includes the following steps:
step 601: and when the first target frame is in the h264 format, analyzing the first target frame to obtain each first data value of the first target frame.
Step 602: in the case where the nal _ ref _ idc data value among the first data values is zero, the first target frame is discarded.
When the first target frame is in a hevc format, analyzing the first target frame to obtain each second data value of the first target frame; in the case where the nal _ unit _ type data value among the second data values is rasln or raslr, the first target frame is discarded.
Filtering each first target frame, second target frame, third target frame, fourth target frame or each key frame by a filter. The filter analyzes the first target frame, the second target frame, the third target frame, the fourth target frame and each key frame, and when the format of the first target frame, the second target frame, the third target frame, the fourth target frame and each key frame is h264, the analyzed nal _ ref _ idc can be directly discarded if the format is 0.
When the format of the first target frame, the second target frame, the third target frame, the fourth target frame, or each key frame is hevc, and the analyzed nal _ unit _ type is RASL _ N or RASL _ R, the nal _ unit _ type can also be directly discarded.
After the first target frame, the second target frame, the third target frame, the fourth target frame or each key frame is discarded, the decoding time is indirectly reduced. nal _ ref _ idc represents the priority of the NALU (Network abstraction Layer), and the larger the value, the more important the current NALU is, the less filterable the NALU is to be discarded. nal _ unit _ type represents the type of the current NALU unit. Can be obtained from queries in h264 and hevc spec. And finally displaying the filtered first target frame, the second target frame, the third target frame, the fourth target frame or each key frame.
Referring to fig. 7, an embodiment of the present application further provides a video decoding apparatus 110 applied to the electronic device 100 shown in fig. 1, where the video decoding apparatus 110 includes:
a processing module 111 and a return execution module 112;
the processing module 111 is configured to:
acquiring the positions of a plurality of key frames of a video to be played;
when the video to be played is played at a double speed, determining each double-speed playing frame in the video to be played;
acquiring and decoding a first target frame, and determining a first decoding capacity for decoding the first target frame, wherein the first target frame is a first speed playing frame in each speed playing frame;
determining a second target frame under the condition that the first decoding capacity belongs to a first preset range, wherein the second target frame is a next double-speed playing frame of the first target frame;
under the condition that a key frame exists between the first target frame and the second target frame, acquiring the key frame based on the position of the key frame and decoding the key frame;
acquiring the second target frame for decoding, and determining a second decoding capability for decoding the second target frame;
reading and decoding the next double-speed playing frame of the second target frame under the condition that the second decoding capacity belongs to the first preset range;
the return execution module 112 is configured to return to execute the step of determining a second target frame when the first decoding capability belongs to a first preset range, and reading and decoding a next double-speed playing frame of the second target frame when the second decoding capability belongs to the first preset range, until a last double-speed playing frame in the double-speed playing frames is decoded.
The method comprises the steps of obtaining the positions of a plurality of key frames of a video to be played, determining each double-speed playing frame in the video to be played when the video to be played is played at double speed, obtaining and decoding a first target frame, determining a first decoding capacity for decoding the first target frame, wherein the first target frame is a first double-speed playing frame in each double-speed playing frame, determining a second target frame under the condition that the first decoding capacity belongs to a first preset range, wherein the second target frame is a next double-speed playing frame of the first target frame, obtaining and decoding the key frame based on the positions of the key frames under the condition that the key frames exist between the first target frame and the second target frame, obtaining and decoding a second target frame, determining a second decoding capacity for decoding the second target frame, reading and decoding the next double-speed playing frame of the second target frame under the condition that the second decoding capacity belongs to the first preset range, and returning to execute the step of determining the second target frame when the first decoding capacity belongs to the first preset range, and reading and decoding the next double-speed playing frame of the second target frame when the second decoding capacity belongs to the first preset range until the last double-speed playing frame in the double-speed playing frames finishes decoding. The method and the device can shorten the time for decoding and taking frames when the video is played at a double speed, so that the video multiple playing is smoother.
The present application further provides an electronic device 100, where the electronic device 100 includes a processor 130 and a memory 120. The memory 120 stores computer-executable instructions that, when executed by the processor 130, implement the video decoding method.
The embodiment of the present application further provides a storage medium, where a computer program is stored, and when the computer program is executed by the processor 130, the video decoding method is implemented.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part. The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
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 phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only for various embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and all such changes or substitutions are included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A method of video decoding, the method comprising:
acquiring the positions of a plurality of key frames of a video to be played;
when the video to be played is played at a double speed, determining each double-speed playing frame in the video to be played;
acquiring and decoding a first target frame, and determining first decoding capacity for decoding the first target frame, wherein the first target frame is a first double-speed playing frame in each double-speed playing frame;
determining a second target frame under the condition that the first decoding capacity belongs to a first preset range, wherein the second target frame is a next double-speed playing frame of the first target frame;
under the condition that a key frame exists between the first target frame and the second target frame, acquiring the key frame based on the position of the key frame and decoding the key frame;
acquiring the second target frame for decoding, and determining a second decoding capability for decoding the second target frame;
reading and decoding the next double-speed playing frame of the second target frame under the condition that the second decoding capacity belongs to the first preset range;
and returning to execute the step of determining a second target frame when the first decoding capacity belongs to a first preset range, and reading and decoding the next double-speed playing frame of the second target frame when the second decoding capacity belongs to the first preset range until the last double-speed playing frame in the double-speed playing frames is decoded.
2. The method of claim 1, further comprising:
and reading and decoding a first target key frame under the condition that the first decoding capability belongs to a second preset range, wherein the first target key frame is positioned after the second target frame.
3. The method according to claim 2, wherein the step of reading and decoding the first target key frame in case that the first decoding capability belongs to a second preset range comprises:
the determining a first display timestamp and a first timestamp of the first target frame;
calculating a first difference between the first display timestamp and the first timestamp;
determining that the first decoding capability belongs to a second preset range under the condition that the first difference is larger than a first preset threshold;
and reading and decoding a first target key frame, wherein the first target key frame is positioned behind the second target frame, and the second preset range comprises the first preset threshold.
4. The method of claim 3, further comprising:
determining a second display timestamp and a second timestamp of the first target keyframe;
calculating a second difference between the second presentation time stamp and the second time stamp;
when the second difference is greater than a second preset threshold value and the frame number of a first video to be played is less than a preset frame number, taking the first target key frame as an initial frame, and obtaining a third target frame according to a first preset playing speed, wherein the first preset playing speed is less than the playing speed of the video to be played, the first video to be played takes the first target key frame as the initial frame and takes a last tail frame of the video to be played as an end frame, the second preset threshold value is greater than the first preset threshold value, and the second preset range comprises the second preset threshold value;
decoding the third target frame.
5. The method according to claim 4, wherein after the step of determining that the first decoding capability belongs to a second preset range in case that the first difference is greater than a first preset threshold, the method further comprises:
reading and decoding a second target key frame when the first difference is greater than a third preset threshold, wherein the third preset threshold is greater than the second preset threshold after the second target key frame is located behind the first target key frame, and the second preset range includes the third preset threshold;
taking the second target key frame as an initial frame, and acquiring a fourth target frame according to a second preset playing speed, wherein the second preset playing speed is less than the first preset playing speed;
decoding the fourth target frame.
6. The method of claim 1, wherein prior to the step of decoding the first target frame, the method further comprises:
when the first target frame is in an h264 format, analyzing the first target frame to obtain each first data value of the first target frame;
dropping the first target frame if the nal _ ref _ idc data value in each of the first data values is zero;
when the first target frame is in a hevc format, analyzing the first target frame to obtain each second data value of the first target frame;
and in the case that the nal _ unit _ type data value in each second data value is RASL N or RASL R, discarding the first target frame.
7. A video decoding apparatus, characterized in that the apparatus comprises: a processing module and a return execution module;
the processing module is configured to:
acquiring positions of a plurality of key frames of a video to be played;
when the video to be played is played at a double speed, determining each double-speed playing frame in the video to be played;
acquiring and decoding a first target frame, and determining a first decoding capacity for decoding the first target frame, wherein the first target frame is a first speed playing frame in each speed playing frame;
determining a second target frame under the condition that the first decoding capacity belongs to a first preset range, wherein the second target frame is a next double-speed playing frame of the first target frame;
under the condition that a key frame exists between the first target frame and the second target frame, acquiring the key frame based on the position of the key frame and decoding the key frame;
acquiring the second target frame for decoding, and determining a second decoding capability for decoding the second target frame;
reading and decoding the next double-speed playing frame of the second target frame under the condition that the second decoding capacity belongs to the first preset range;
the return execution module is configured to return to execute the step of determining a second target frame when the first decoding capability belongs to a first preset range, and reading and decoding a next double-speed playing frame of the second target frame when the second decoding capability belongs to the first preset range, until a last double-speed playing frame in the double-speed playing frames is decoded.
8. The apparatus of claim 7, wherein the processing module is further configured to:
and reading and decoding a first target key frame under the condition that the first decoding capability belongs to a second preset range, wherein the first target key frame is positioned after the second target frame.
9. An electronic device, comprising a memory storing a computer program and a processor, the processor implementing the steps of the method according to any one of claims 1-6 when executing the computer program.
10. A storage medium on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210485315.4A CN114666603B (en) | 2022-05-06 | 2022-05-06 | Video decoding method and device, electronic equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210485315.4A CN114666603B (en) | 2022-05-06 | 2022-05-06 | Video decoding method and device, electronic equipment and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114666603A true CN114666603A (en) | 2022-06-24 |
| CN114666603B CN114666603B (en) | 2024-05-03 |
Family
ID=82037050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210485315.4A Active CN114666603B (en) | 2022-05-06 | 2022-05-06 | Video decoding method and device, electronic equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114666603B (en) |
Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000059219A1 (en) * | 1999-03-30 | 2000-10-05 | Sony Electronics Inc. | Digital video decoding, buffering and frame-rate converting method and apparatus |
| WO2000059218A1 (en) * | 1999-03-30 | 2000-10-05 | Sony Electronics Inc. | Digital video decoding, buffering and frame-rate converting method and apparatus |
| US7885338B1 (en) * | 2005-04-25 | 2011-02-08 | Apple Inc. | Decoding interdependent frames of a video for display |
| US20110310956A1 (en) * | 2010-06-22 | 2011-12-22 | Jian-Liang Lin | Methods for controlling video decoder to selectively skip one or more video frames and related signal processing apparatuses thereof |
| CN103491387A (en) * | 2012-06-14 | 2014-01-01 | 深圳市快播科技有限公司 | System, on-demand unicast terminal and method for video positioning |
| CN103686411A (en) * | 2013-12-11 | 2014-03-26 | 深圳Tcl新技术有限公司 | Method for playing video and multimedia device |
| CN104602117A (en) * | 2015-01-31 | 2015-05-06 | 华为技术有限公司 | Double-speed video playing method and device |
| CN104980797A (en) * | 2015-05-27 | 2015-10-14 | 腾讯科技（深圳）有限公司 | Video decoding method and client |
| US20150296213A1 (en) * | 2014-04-14 | 2015-10-15 | Broadcom Corporation | Pipelined Video Decoder System |
| CN106454314A (en) * | 2016-10-24 | 2017-02-22 | 传线网络科技（上海）有限公司 | Panoramic video decoding method and device |
| CN107801092A (en) * | 2017-09-15 | 2018-03-13 | 青岛海信移动通信技术股份有限公司 | A kind of video speed playing method and device |
| CN107948735A (en) * | 2017-12-06 | 2018-04-20 | 北京金山安全软件有限公司 | Video playing method and device and electronic equipment |
| CN108063973A (en) * | 2017-12-14 | 2018-05-22 | 浙江大华技术股份有限公司 | A kind of method for decoding video stream and equipment |
| CN108737893A (en) * | 2018-06-05 | 2018-11-02 | 上海哔哩哔哩科技有限公司 | Realize that quick first frame goes out the video broadcasting method, device and medium of figure based on hybrid decoding |
| CN110248245A (en) * | 2019-06-21 | 2019-09-17 | 维沃移动通信有限公司 | A kind of video locating method, device, mobile terminal and storage medium |
| CN111416978A (en) * | 2020-04-29 | 2020-07-14 | 随锐科技集团股份有限公司 | Video encoding and decoding method and system, and computer readable storage medium |
| CN112087633A (en) * | 2019-06-12 | 2020-12-15 | 腾讯科技（深圳）有限公司 | Video decoding method, device and storage medium |
| CN112437345A (en) * | 2020-11-20 | 2021-03-02 | 北京字跳网络技术有限公司 | Video speed doubling playing method and device, electronic equipment and storage medium |
| CN113596518A (en) * | 2021-08-13 | 2021-11-02 | 北京中电兴发科技有限公司 | Video access method for improving double-speed playing performance |
| CN114257878A (en) * | 2020-09-21 | 2022-03-29 | 深圳富桂精密工业有限公司 | Method for playing video at double speed, computer device and storage medium |
| CN114257857A (en) * | 2022-01-04 | 2022-03-29 | 海信视像科技股份有限公司 | Display device and video double-speed playing method |
| CN114302180A (en) * | 2021-12-31 | 2022-04-08 | 深圳市创维软件有限公司 | Video single-frame playing method, device, server, system and storage medium |
| CN114339408A (en) * | 2021-11-26 | 2022-04-12 | 惠州华阳通用电子有限公司 | Video decoding method |
-
2022
- 2022-05-06 CN CN202210485315.4A patent/CN114666603B/en active Active
Patent Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000059218A1 (en) * | 1999-03-30 | 2000-10-05 | Sony Electronics Inc. | Digital video decoding, buffering and frame-rate converting method and apparatus |
| WO2000059219A1 (en) * | 1999-03-30 | 2000-10-05 | Sony Electronics Inc. | Digital video decoding, buffering and frame-rate converting method and apparatus |
| US7885338B1 (en) * | 2005-04-25 | 2011-02-08 | Apple Inc. | Decoding interdependent frames of a video for display |
| US20110310956A1 (en) * | 2010-06-22 | 2011-12-22 | Jian-Liang Lin | Methods for controlling video decoder to selectively skip one or more video frames and related signal processing apparatuses thereof |
| CN103491387A (en) * | 2012-06-14 | 2014-01-01 | 深圳市快播科技有限公司 | System, on-demand unicast terminal and method for video positioning |
| CN103686411A (en) * | 2013-12-11 | 2014-03-26 | 深圳Tcl新技术有限公司 | Method for playing video and multimedia device |
| US20150296213A1 (en) * | 2014-04-14 | 2015-10-15 | Broadcom Corporation | Pipelined Video Decoder System |
| CN104602117A (en) * | 2015-01-31 | 2015-05-06 | 华为技术有限公司 | Double-speed video playing method and device |
| CN104980797A (en) * | 2015-05-27 | 2015-10-14 | 腾讯科技（深圳）有限公司 | Video decoding method and client |
| CN106454314A (en) * | 2016-10-24 | 2017-02-22 | 传线网络科技（上海）有限公司 | Panoramic video decoding method and device |
| CN109922342A (en) * | 2016-10-24 | 2019-06-21 | 传线网络科技（上海）有限公司 | Panoramic video coding/decoding method and device |
| CN107801092A (en) * | 2017-09-15 | 2018-03-13 | 青岛海信移动通信技术股份有限公司 | A kind of video speed playing method and device |
| CN107948735A (en) * | 2017-12-06 | 2018-04-20 | 北京金山安全软件有限公司 | Video playing method and device and electronic equipment |
| CN108063973A (en) * | 2017-12-14 | 2018-05-22 | 浙江大华技术股份有限公司 | A kind of method for decoding video stream and equipment |
| CN108737893A (en) * | 2018-06-05 | 2018-11-02 | 上海哔哩哔哩科技有限公司 | Realize that quick first frame goes out the video broadcasting method, device and medium of figure based on hybrid decoding |
| CN112087633A (en) * | 2019-06-12 | 2020-12-15 | 腾讯科技（深圳）有限公司 | Video decoding method, device and storage medium |
| CN110248245A (en) * | 2019-06-21 | 2019-09-17 | 维沃移动通信有限公司 | A kind of video locating method, device, mobile terminal and storage medium |
| CN111416978A (en) * | 2020-04-29 | 2020-07-14 | 随锐科技集团股份有限公司 | Video encoding and decoding method and system, and computer readable storage medium |
| CN114257878A (en) * | 2020-09-21 | 2022-03-29 | 深圳富桂精密工业有限公司 | Method for playing video at double speed, computer device and storage medium |
| CN112437345A (en) * | 2020-11-20 | 2021-03-02 | 北京字跳网络技术有限公司 | Video speed doubling playing method and device, electronic equipment and storage medium |
| CN113596518A (en) * | 2021-08-13 | 2021-11-02 | 北京中电兴发科技有限公司 | Video access method for improving double-speed playing performance |
| CN114339408A (en) * | 2021-11-26 | 2022-04-12 | 惠州华阳通用电子有限公司 | Video decoding method |
| CN114302180A (en) * | 2021-12-31 | 2022-04-08 | 深圳市创维软件有限公司 | Video single-frame playing method, device, server, system and storage medium |
| CN114257857A (en) * | 2022-01-04 | 2022-03-29 | 海信视像科技股份有限公司 | Display device and video double-speed playing method |
Non-Patent Citations (3)
| Title |
|---|
| JUNHUI HOU: "《Compressing 3-D Human Motions via Keyframe-Based Geometry Videos》", 《IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY》, vol. 25, no. 1 * |
| 傅银城: "《基于分布式算术编码的低复杂度视频编码器研究》", 《中国优秀硕士学位论文全文数据库》 * |
| 王辉: "《一种基于Android的视频自适应算法设计》", 《工业仪表与自动化装置》, no. 6 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114666603B (en) | 2024-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4481889B2 (en) | Data recording apparatus and method, program, and recording medium | |
| CN102026017B (en) | Efficient test method for video decoding | |
| EP1635575A1 (en) | System and method for embedding scene change information in a video bitstream | |
| CN103886883B (en) | A kind of to damaging the method and system that video monitoring data recovers | |
| JP2009005388A (en) | Video information reproducing method and video information reproducing device | |
| US20080172140A1 (en) | Audio playback time estimating apparatus and method | |
| KR20090007177A (en) | Apparatus and method for selective real time recording based on face identification | |
| EP1472880B1 (en) | Error correction of stream data | |
| CN111277800A (en) | Monitoring video coding and playing method and device, electronic equipment and storage medium | |
| CN107124571B (en) | Video storage method and device | |
| CN114666603B (en) | Video decoding method and device, electronic equipment and storage medium | |
| CN100459686C (en) | Video reproducing apparatus | |
| US20040071353A1 (en) | Sequential digital image compression | |
| CN103165157A (en) | Method and device for locating playing position of no-indexing audio video interleaved (AVI) file and player | |
| CN102169706B (en) | Method and device for storing and playing YUV file | |
| EP1568231B1 (en) | Method for recording data , method for retrieving sets of data, data file, data structure and recording medium | |
| CN112468847B (en) | Trick play method and device of multimedia stream and multimedia player | |
| KR101086434B1 (en) | Method and apparatus for displaying video data | |
| CN110990239A (en) | System and method for collecting user data in user equipment based on soft sensor | |
| CN114245231B (en) | Multi-video synchronous skipping method, device and equipment and readable storage medium | |
| CN116668632A (en) | Holographic video playing method, device, equipment and storage medium | |
| CN111131868B (en) | Video recording method and device based on player | |
| CN111726683B (en) | Media playing method and device, electronic equipment and storage medium | |
| CN111225210B (en) | Video coding method, video coding device and terminal equipment | |
| JP5191294B2 (en) | Information processing apparatus and program |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |