CN103856812B - A kind of video broadcasting method and device - Google Patents
A kind of video broadcasting method and device Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of video broadcasting method and devices, are applied to mobile terminal, and this method includes：Since playing target video file, the decoded video frame number of target video file in preset duration is detected；Judge whether target video file frame decoding speed is less than target video file frame broadcasting speed；In the case where target video file frame decoding speed is less than target video file frame broadcasting speed, not yet decoded non-reference frame in target video file is abandoned, not yet decoded reference frame in target video file is decoded；Reference frame in the decoded target video file is played out.Using the embodiment of the present invention, not yet decoded non-reference frame in target video file is abandoned in advance, during carrying out subsequent video broadcasting, it is decoded and plays there is no need to the video frame to discarding, it solves in video display process, the phenomenon that video playing interim card of appearance, improves the experience effect that user watches video.
Description
Technical field
The present invention relates to mobile terminal videos to play field, more particularly to a kind of video broadcasting method and device.
Background technology
Mobile terminal（Such as mobile phone, laptop, tablet computer etc.）Rapid development, allow people can be whenever and wherever possible
Carry out the broadcasting of video.
Video broadcasting method in the prior art is typically to pre-set video sound to draw synchronizing time point, in video playing
During, CPU（Central Processing Unit, central processing unit）The audio frame and video frame of video are solved
Code, video sound draw synchronizing time point audio frame and video frame are synchronized, after synchronously completing, continue video audio frame and
Video frame decoding and broadcasting.
But above-mentioned video broadcasting method in video display process, just will appear video playing in some cases
The phenomenon that interim card, seriously affects the experience that user watches video.
For example, when watching HD video using low configurating mobile, since the limitation of handset capability causes the solution to video
Code scarce capacity, i.e., be not achieved the decoding speed of video frame the normal playback speed of video frame, in this case, in order to reach
Synchronous effect is drawn to sound, it is necessary to stop playing by video, decoding of the waiting for CPU to video frame, when decoded video frame
When timestamp reaches sound picture synchronizing time point, from the time point, continue the broadcasting of video.
For example, certain video totally 60 seconds, 25 frames of normal play frame per second/second, when the 10th second end carries out sound and draws synchronous, audio frame
250 frames are played to, presentation of video frames to 225 frames, video is by stopping broadcasting at this time, until the video frame of the 226th frame to the 250th frame
It is completed by decoding, video continued to play again from the 10th second end.
Invention content
The embodiment of the present invention is designed to provide a kind of video broadcasting method and device, to solve video display process
In, the phenomenon that the video playing interim card of appearance, improve the experience effect that user watches video.
In order to achieve the above objectives, the embodiment of the invention discloses a kind of video broadcasting methods, are applied to mobile terminal, packet
It includes：
Since playing target video file, the decoded video frame number of target video file in preset duration is examined
It surveys；
According to detecting as a result, judging whether the decoded video frame number of target video file in the unit interval is less than in advance
The target video file frame per second of acquisition；
The decoded video frame number of target video file is less than the target video file frame per second being obtained ahead of time within the unit interval
In the case of, abandon target video file in not yet decoded non-reference frame, without decoding, in target video file not yet
Decoded reference frame is decoded；
Reference frame in the decoded target video file is played out；
Wherein, non-reference frame refers to the frame not referred to when IPB codings.
Preferably, the target video file frame per second is obtained ahead of time, including：
Before not played to target video file, target video file frame per second is obtained；Or
After target video file starts to play and before judging to operate, target video file frame per second is obtained；
Wherein, the judgement, which operates, is
Judge whether the decoded video frame number of target video file in the unit interval is less than the target video text being obtained ahead of time
Part frame per second.
Preferably, not yet decoded non-reference frame in the discarding target video file, without decoding, to target video
Not yet decoded reference frame is decoded in file, including：
Judge whether not yet decoded each video frame is non-reference frame in target video file；
In the case that not yet decoded video frame is non-reference frame in target video file, abandon in target video file
Not yet decoded non-reference frame, without decoding；
Not yet decoded reference frame in target video file is decoded.
Preferably, described judge whether not yet decoded each video frame is non-reference frame in target video file, including：
Judge whether the frame type of not yet decoded each video frame in target video file belongs to non-reference frame；Or
Judge the frame head of not yet decoded each video frame in target video file whether containing specific to non-reference frame
Mark.
Preferably, the reference frame in the decoded target video file plays out, including：
According to the decoded video frame number of target video file in the preset duration detected, target video file video is calculated
Frame decoding speed plays out the reference frame in the decoded target video file with calculated decoding speed.
Preferably, the reference frame in the decoded target video file plays out, including：
Reference frame in the decoded target video file is played out with target video file frame per second, wherein
Image is shown according to previous reference frame image adjacent thereto at the non-reference frame being dropped.
In order to achieve the above objectives, the embodiment of the invention also discloses a kind of video play devices, are applied to mobile terminal, packet
It includes：
Detection module, for since target video file play, to the video solution of target video file in preset duration
Code frame number is detected；
Judgment module, for according to detecting as a result, judge the decoded video frame of target video file in the unit interval
Whether number is less than the target video file frame per second being obtained ahead of time；
Decoder module, in the case where judgment module judging result is to be, abandoning and not yet being solved in target video file
The non-reference frame of code is decoded not yet decoded reference frame in target video file without decoding；
Playing module, for being played out to the reference frame in the decoded target video file；
Wherein, non-reference frame refers to the frame not referred to when IPB codings.
Preferably, the target video file frame per second is obtained ahead of time, including：
Before not played to target video file, target video file frame per second is obtained；Or
After target video file starts to play and before judging to operate, target video file frame per second is obtained；
Wherein, the judgement, which operates, is
Judge whether the decoded video frame number of target video file in the unit interval is less than the target video text being obtained ahead of time
Part frame per second.
Preferably, the decoder module, including：Judging submodule abandons submodule and decoding sub-module；
The judging submodule, for judging whether not yet decoded each video frame is non-reference in target video file
Frame；
The discarding submodule, in the case where judging submodule is judged as YES, abandoning in target video file still
Not decoded non-reference frame, without decoding；
The decoding sub-module, for being decoded to not yet decoded reference frame in target video file.
Preferably, the judging submodule, is specifically used for：
Judge whether the frame type of not yet decoded each video frame in target video file belongs to non-reference frame；Or
Judge the frame head of not yet decoded each video frame in target video file whether containing specific to non-reference frame
Mark.
Preferably, the playing module, is specifically used for：
According to the decoded video frame number of target video file in the preset duration detected, target video file video is calculated
Frame decoding speed plays out the reference frame in the decoded target video file with calculated decoding speed.
Preferably, the playing module, is specifically used for：
Reference frame in the decoded target video file is played out with target video file frame per second, wherein
Image is shown according to previous reference frame image adjacent thereto at the non-reference frame being dropped.
As seen from the above technical solutions, a kind of video broadcasting method of offer of the embodiment of the present invention and device, are applied to move
Dynamic terminal just examines the decoded video frame number of target video file in preset duration since playing target video file
It surveys, is obtained ahead of time according to detecting as a result, judging whether the decoded video frame number of target video file in the unit interval is less than
Target video file frame per second, the decoded video frame number of target video file is less than the target that is obtained ahead of time and regards within the unit interval
In the case of frequency file frame per second, not yet decoded non-reference frame in target video file is abandoned in advance, without decoding,
Only not yet decoded reference frame in target video file is decoded, during carrying out subsequent video broadcasting, is just not required to
The video frame of discarding is decoded and is played, solves in video display process, the phenomenon that the video playing interim card of appearance,
Improve the experience effect that user watches video.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of flow diagram of video broadcasting method provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of video play device provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Below by specific embodiment, the present invention is described in detail.
It should be noted that the embodiment of the present invention, which provides a kind of video broadcasting method, is suitable for mobile terminal.In reality
In, which can be smart mobile phone, laptop, tablet computer etc..
Fig. 1 is a kind of flow diagram of video broadcasting method provided in an embodiment of the present invention, including：
S101：Since playing target video file, to the decoded video frame number of target video file in preset duration into
Row detection；
S102：According to detecting as a result, judging whether the decoded video frame number of target video file in the unit interval is small
In the target video file frame per second being obtained ahead of time, if so, S103 is executed, if not, executing S105；
S103：Not yet decoded non-reference frame in target video file is abandoned, without decoding, in target video file
Not yet decoded reference frame is decoded；
S104：Reference frame in the decoded target video file is played out；
S105：The video frame for not yet decoding and playing in target video file is decoded and is played.
It should be noted that the frame that does not refer to when non-reference frame refers to IPB codings, when decoding also without necessarily referring to the frame just
Other frames can be decoded, if having abandoned reference frame, when the decoding of subsequent video frame needs to refer to the frame and is decoded,
The decoding that may result in subsequent video frame goes wrong, and cannot be shown so as to cause one section of video, next until being decoded to
Reference frame.
Illustratively, in an embodiment of the present invention, it is assumed that target video file A durations 30 seconds, 25 frames of frame per second/second, then
Target video file A videos amount to 750 frames.
Assuming that since being played target video file A, detects in first 2 seconds and 56 frame of decoding video is total to A, then A is regarded
Frequency frame is averaged decoding speed as 56 frame/2 second=28 frames/second.
It can be seen that being averaged decoding speed more than A frame per second to the video frame of target video file A, sound not will produce at this time
The generation for drawing synchronization video Caton phenomenon continues without carrying out frame losing operation to target video file A to target video file A
In the video frame that not yet decodes and play be decoded and play.
Assuming that since being played target video file A, it is assumed that detect in first 2 seconds and be total to 48 frame of decoding video to A, then to A
Video frame be averaged decoding speed be 48 frame/2 second=24 frames/second.
It can be seen that being averaged decoding speed less than A frame per second to the video frame of target video file A, then target video is abandoned
Not yet decoded non-reference frame in file A solves not yet decoded reference frame in target video file without decoding
Code.
Specifically, being needed to target video file before not yet decoded non-reference frame in abandoning target video file
In not yet decoded each video frame whether be that non-reference frame is judged, the video frame be non-reference frame in the case of, into
Row abandons.
It is understood that there are many ways to judging the non-reference frame in target video file, such as：Judge that target regards
Whether the video frame type in frequency file belongs to non-reference frame, and when video frame type belongs to non-reference frame, which is non-reference
Frame；Or judge whether the frame head of the video frame in target video file contains the specific mark of non-reference frame, work as video frame
Frame head when containing the specific mark of non-reference frame, which is non-reference frame；Certainly it is not limited thereto.
It is understood that being abandoned to not yet decoded non-reference frame in target video file, target can be regarded
Not yet decoded each video frame is detected in frequency file, upon completion of the assays, is abandoned to non-reference frame, also may be used together
When often detecting a non-reference frame, that is, the frame is abandoned, continues to detect next video frame.
Optionally, target video file frame per second is obtained ahead of time, can target video file start play after and
It is obtained before judging to operate, wherein the judgement, which operates, is：
Judge whether the decoded video frame number of target video file in the unit interval is less than the target video text being obtained ahead of time
Part frame per second.
Further, optionally, target video file frame per second is obtained ahead of time, target video file can also be not being broadcast
It is obtained before putting.For example, being analyzed in advance the file preserved on mobile terminal, by all video files on mobile terminal
The information preservations such as frame per second, duration, document location, file name in tables of data, pending video file frame per second compare when
It waits, the frame per second of video file to be judged is extracted from the tables of data.
Optionally, continue in the specific implementation, after carrying out abandoning completion together to non-reference frame at of the invention one
When the decoding and broadcasting of reference frame, target can be calculated according to target video file residue reference frame number and remaining playing duration
Video file broadcasting speed plays out target video file residue reference frame with calculated speed.
Illustratively, target video file A videos amount to 750 frames, 30 seconds, 25 frames of frame per second/second, wherein play in first 2 seconds
Decode 48 frames, totally 58 frame of the non-reference frame in the target video file A of discarding not yet in decoding video, then target video file is surplus
Remaining reference frame number is：The frames of 750-48-58=644, remaining playing duration are：30-2=28 second, then target video file broadcasting speed=
644 frame/28 second=23 frames/second.The remaining reference frame of target video file A is played out with the broadcasting speed of 23 frame per second.
Optionally, the present invention one in the specific implementation, when to the reference frame in decoded target video file after
It is continuous when playing out, it can calculate target according to the decoded video frame number of target video file in the preset duration detected and regard
Frequency file video frame decoding speed, to the reference frame in the decoded target video file with calculated decoding speed into
Row plays.
Illustratively, target video file A videos amount to 750 frames, 30 seconds, 25 frames of frame per second/second, wherein play in first 2 seconds
48 frames are decoded, then 24 frames of decoding per second, is played out with carrying out remaining video to the decoding speed of target video file A, i.e., often
Second plays 24 frames.
Optionally, the present invention one in the specific implementation, when to the reference frame in decoded target video file after
It is continuous when playing out, the reference frame in the decoded target video file can be broadcast with target video file frame per second
It puts, wherein image is shown according to previous reference frame image adjacent thereto at the non-reference frame being dropped.
Illustratively, target video file A videos amount to 750 frames, 30 seconds, 25 frames of frame per second/second, wherein play in first 2 seconds
Decode 48 frames, the non-reference frame in the target video file A of discarding not yet in decoding video is respectively：100th frame, the 117th frame,
147th frame ....
Target video file is played out with the speed of 25 frame per second, when playing the 100th frame video, due to this
Frame video has been dropped, therefore image shows the image of the 99th frame at the frame, identical, when playing the 117th frame video,
Image shows the image of the 116th frame at the frame, and when playing the 147th frame video, image shows the figure of the 146th frame at the frame
Picture ....
Using embodiment illustrated in fig. 1 of the present invention, not yet decoded non-reference frame in target video file is lost in advance
It abandons, without decoding, only not yet decoded reference frame in target video file is decoded, carrying out subsequent video broadcasting
In the process, it is decoded and plays there is no need to the video frame to discarding, solve in video display process, the video of appearance is broadcast
The phenomenon that putting interim card improves the experience effect that user watches video.
Fig. 2 is a kind of structural schematic diagram of video play device provided in an embodiment of the present invention, including：Detection module 201,
Judgment module 202, decoder module 203 and playing module 204.
Wherein, detection module 201, for since target video file play, to target video file in preset duration
Decoded video frame number be detected；
Judgment module 202, for according to detect as a result, judge target video file in the unit interval video decode
Whether frame number is less than the target video file frame per second being obtained ahead of time；
Optionally, to the acquisition of target video file frame per second, mesh can be obtained before not played to target video file
Mark video file frame per second；Or
After target video file starts to play and before judging to operate, target video file frame per second is obtained；
Wherein, the judgement, which operates, is
Judge whether the decoded video frame number of target video file in the unit interval is less than the target video text being obtained ahead of time
Part frame per second；
Decoder module 203, in the case where judgment module judging result is to be, abandoning in target video file not yet
Decoded non-reference frame is decoded not yet decoded reference frame in target video file without decoding；
Decoder module 203 in the present embodiment, including：Judging submodule abandons submodule and decoding sub-module（In figure not
It shows）；
Wherein, judging submodule, for judging whether not yet decoded each video frame is non-ginseng in target video file
Examine frame；
Submodule is abandoned, in the case where judging submodule is judged as YES, abandoning and not yet being solved in target video file
The non-reference frame of code, without decoding；
Decoding sub-module, for being decoded to not yet decoded reference frame in target video file；
Wherein, judging submodule specifically can be used for：
Judge whether the frame type of not yet decoded each video frame in target video file belongs to non-reference frame；Or
Judge the frame head of not yet decoded each video frame in target video file whether containing specific to non-reference frame
Mark；
Playing module 204, for being played out to the reference frame in the decoded target video file；
Playing module 204 in the present embodiment, specifically can be used for：
According to the decoded video frame number of target video file in the preset duration detected, target video file video is calculated
Frame decoding speed plays out the reference frame in the decoded target video file with calculated decoding speed；
Playing module 204 in the present embodiment, specifically can be used for：
Reference frame in the decoded target video file is played out with target video file frame per second, wherein
Image is shown according to previous reference frame image adjacent thereto at the non-reference frame being dropped.
It should be noted that the frame that does not refer to when non-reference frame refers to IPB codings, when decoding also without necessarily referring to the frame just
Other frames can be decoded, if having abandoned reference frame, when the decoding of subsequent video frame needs to refer to the frame and is decoded,
The decoding that may result in subsequent video frame goes wrong, and cannot be shown so as to cause one section of video, next until being decoded to
Reference frame.
Using embodiment illustrated in fig. 2 of the present invention, not yet decoded non-reference frame in target video file is lost in advance
It abandons, without decoding, only not yet decoded reference frame in target video file is decoded, carrying out subsequent video broadcasting
In the process, it is decoded and plays there is no need to the video frame to discarding, solve in video display process, the video of appearance is broadcast
The phenomenon that putting interim card improves the experience effect that user watches video.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is all made of relevant mode and describes, identical similar portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for device reality
For applying example, since it is substantially similar to the method embodiment, so description is fairly simple, related place is referring to embodiment of the method
Part explanation.
One of ordinary skill in the art will appreciate that all or part of step in realization above method embodiment is can
It is completed with instructing relevant hardware by program, the program can be stored in computer read/write memory medium,
The storage medium designated herein obtained, such as：ROM/RAM, magnetic disc, CD etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (8)
1. a kind of video broadcasting method is applied to mobile terminal, which is characterized in that the method includes：
Since playing target video file, the decoded video frame number of target video file in preset duration is detected；
It is obtained ahead of time according to detecting as a result, judging whether the decoded video frame number of target video file in the unit interval is less than
Target video file frame per second；
The decoded video frame number of target video file is less than the feelings for the target video file frame per second being obtained ahead of time within the unit interval
Under condition, not yet decoded non-reference frame in target video file is abandoned, without decoding, to not yet being decoded in target video file
Reference frame be decoded；
Reference frame in the decoded target video file is played out；
Wherein, non-reference frame refers to the frame not referred to when IPB codings；
The reference frame in the decoded target video file plays out, including：
According to the decoded video frame number of target video file in the preset duration detected, target video file video frame solution is calculated
Code speed, the reference frame in the decoded target video file is played out with calculated decoding speed.
2. according to the method described in claim 1, it is characterized in that, the target video file frame per second is obtained ahead of time, including：
Before not played to target video file, target video file frame per second is obtained；Or
After target video file starts to play and before judging to operate, target video file frame per second is obtained；
Wherein, the judgement, which operates, is
Judge whether the decoded video frame number of target video file in the unit interval is less than the target video file frame being obtained ahead of time
Rate.
3. according to the method described in claim 1, it is characterized in that, not yet decoded non-ginseng in the discarding target video file
Frame is examined, without decoding, not yet decoded reference frame in target video file is decoded, including：
Judge whether not yet decoded each video frame is non-reference frame in target video file；
In the case that not yet decoded video frame is non-reference frame in target video file, abandon in target video file not yet
Decoded non-reference frame, without decoding；
Not yet decoded reference frame in target video file is decoded.
4. according to the method described in claim 3, it is characterized in that, not yet decoded each in the judgement target video file
Whether video frame is non-reference frame, including：
Judge whether the frame type of not yet decoded each video frame in target video file belongs to non-reference frame；Or
Judge the frame head of not yet decoded each video frame in target video file whether containing the specific mark of non-reference frame.
5. a kind of video play device, it is applied to mobile terminal, which is characterized in that described device includes：
Detection module, for since target video file play, to the decoded video frame of target video file in preset duration
Number is detected；
Judgment module, for according to detecting as a result, judge that the decoded video frame number of target video file in the unit interval is
It is no less than the target video file frame per second being obtained ahead of time；
Decoder module, in the case where judgment module judging result is to be, abandoning not yet decoded in target video file
Non-reference frame is decoded not yet decoded reference frame in target video file without decoding；
Playing module, for being played out to the reference frame in the decoded target video file；
Wherein, non-reference frame refers to the frame not referred to when IPB codings；
The playing module, is specifically used for：
According to the decoded video frame number of target video file in the preset duration detected, target video file video frame solution is calculated
Code speed, the reference frame in the decoded target video file is played out with calculated decoding speed.
6. device according to claim 5, which is characterized in that the target video file frame per second is obtained ahead of time, including：
Before not played to target video file, target video file frame per second is obtained；Or
After target video file starts to play and before judging to operate, target video file frame per second is obtained；
Wherein, the judgement, which operates, is
Judge whether the decoded video frame number of target video file in the unit interval is less than the target video file frame being obtained ahead of time
Rate.
7. device according to claim 5, which is characterized in that the decoder module, including：Judging submodule abandons son
Module and decoding sub-module；
The judging submodule, for judging whether not yet decoded each video frame is non-reference frame in target video file；
The discarding submodule, in the case where judging submodule is judged as YES, abandoning and not yet being solved in target video file
The non-reference frame of code, without decoding；
The decoding sub-module, for being decoded to not yet decoded reference frame in target video file.
8. device according to claim 7, which is characterized in that the judging submodule is specifically used for：
Judge whether the frame type of not yet decoded each video frame in target video file belongs to non-reference frame；Or
Judge the frame head of not yet decoded each video frame in target video file whether containing the specific mark of non-reference frame.
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| CN114257846A (en) * | 2021-12-23 | 2022-03-29 | 杭州登虹科技有限公司 | Content-aware-based mobile terminal self-adaptive video speed-doubling playing method |
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