CN102647622B - Play progress management method for streaming media clip and play progress management system for streaming media clip - Google Patents
Play progress management method for streaming media clip and play progress management system for streaming media clip Download PDFInfo
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Abstract
The invention relates to the technical field of streaming media and provides a play progress management method for streaming media clip and a play progress management system for the streaming media clip. The method comprises the following steps of sending EOS/BOS (End of Segment/Begin of Segment) information after sending a segment of clip data, starting the monitoring for PTS (Presentation Time Stamp) according the received information, obtaining a current PTS value at every time interval, comparing the current PTS value and a PTS value monitored at the prior time, judging that the non-overturn jump is generated if the change is over the normal counting progression and overturning is not generated, go on monitoring if not, obtaining the current play time as the reference time and the PTS value as the corresponding reference PTS value when in the non-overturn jump, and updating the display and the control for the play time and the play progress. In the embodiment, the invention provides the play progress management method for the streaming media clip and the play progress management system for the streaming media clip, so that the overall play progress can be displayed and controlled normally and accurately under the condition of continuous play for multi-segment streaming media clip.
Description
Technical field
The present invention relates to stream media technology field, particularly a kind of Streaming Media clips played progress control method and system.
Background technology
Along with enriching of the applications of computer network, in the Internet, the demand of using and processing of files in stream media is increasing, occurred manyly a plurality of different Streaming Media montage fragments to be associated together to situation about playing continuously, as movie trailer (splicing that comprises a plurality of fragments in film), simplify story of a play or opera fragment (comprising the combined and spliced of multi-section works different fragments), song skewered etc.Because the content of many times these Streaming Media montages is discontinuous, and it is not identical at aspects such as forms, the file that will be spliced into continuous broadcasting need to carry out a large amount of processing to each clip content, and the processing of the complete playing progress rate of especially a plurality of montage fragments is more complicated.
In prior art, in the playing process of files in stream media, the demonstration of progress is all based on PTS (Presentation Time Stamp conventionally, the timestamp of display frame) calculate, wherein, the time point that the every section of Streaming Media of take starts to play is fiducial time, the pts value of the first corresponding width image frame is as benchmark PTS, on the basis of fiducial time and benchmark PTS, utilize current PTS to calculate reproduction time, then determine by reproduction time and the ratio of total reproduction time the playing progress rate showing.
Yet, in realizing process of the present invention, inventor finds, the processing method of prior art is only applicable to the continuous multistage montage of pts value, and (this class file is same flow media file cut apart naturally normally, as a plurality of continuous fragment of DVD), and cannot between the discontinuous multistage montage of pts value, use.But for common montage splicing, the pts value of each fragment is only continuous in its segmentation in most cases, and between segmentation, pts value has larger difference conventionally.Therefore, in prior art, when this Streaming Media montage of continuous broadcasting, because the pts value in each fragment is intersegmental discontinuous, when fragment redirect for the first time, just start the mistake that generation progress is calculated and shown, whole playing process progress shows and becomes disorderly and unsystematicly, causes that streaming media playing is undesired even causes playing process collapse.Although can suitably alleviate this situation by artificial preliminary treatment, artificial preliminary treatment needs professional knowledge, and for multistage video, and greatly, easily make mistakes, processing time, accuracy and precision all cannot be guaranteed artificial pretreated workload.
Summary of the invention
(1) technical problem that will solve
For the shortcoming of prior art, the present invention, in order to solve the problem that in prior art, the montage of multi-disc section Streaming Media cannot be play effectively continuously, has proposed a kind of Streaming Media clips played progress control method and system.
(2) technical scheme
To achieve these goals, on the one hand, the invention provides a kind of Streaming Media clips played progress control method, described method comprises step:
S1 when playing multistage montage, when server sends the data of one section of montage, can send EOS/BOS message to terminal simultaneously;
S2, the Play System of terminal is according to message initiated the intercepting PTS of EOS/BOS of receiving;
S3, in intercepting process, gets once current pts value at set intervals;
S4, compares current pts value and front pts value of once intercepting, if the variation between twice pts value has exceeded normal counting progression, and is not, while there is upset, to think that non-upset saltus step has occurred PTS, execution step S5; Otherwise returning to step S3 continues to intercept;
S5, during non-upset saltus step, getting current reproduction time is fiducial time, getting current pts value is corresponding benchmark pts value, upgrades demonstration and the control of reproduction time and playing progress rate; Stop subsequently intercepting, return to step S1 wait and again receive the EOS/BOS message of server until all clips played is complete.
Preferably, in step S4, the variation between described twice pts value has exceeded normal counting progression and has referred to: (| current pts value-front pts value of once intercepting |)/90000 are greater than saltus step threshold value.
Preferably, in step S4, the decision procedure whether described upset occurs is: if (PTS maximum-| current pts value-front pts value of once intercepting |)/90000 are less than saltus step threshold value, upset has occurred in judgement, otherwise thinks and do not overturn.
Preferably, if do not overturn, the computing formula of reproduction time is:
Reproduction time=fiducial time+(| current pts value-benchmark pts value |)/90000.
Preferably, if there is upset, the computing formula of reproduction time becomes:
Reproduction time=fiducial time+and (PTS maximum-| current pts value-benchmark pts value |)/90000.
Preferably, for described saltus step threshold value, have:
Under normal play state: saltus step threshold value=listening interval time * 2;
Under speed broadcast state: saltus step threshold value=broadcasting speed * key frame interval time * 2.
On the other hand, the present invention also provides a kind of Streaming Media clips played progress control system simultaneously, and described system comprises message transmission module, intercepts startup module, intercepts module, judge module and update module; Wherein,
Described message transmission module for when playing multistage montage, sends EOS/BOS message to terminal when server sends the data of one section of montage;
The described startup module of intercepting, message initiated the intercepting PTS of EOS/BOS of receiving for basis;
The described module of intercepting, for intercepting process, gets once current pts value at set intervals;
Described judge module, for current pts value and front pts value of once intercepting are compared, if the variation between twice pts value has exceeded normal counting progression, and not while there is upset, think that non-upset saltus step has occurred PTS, transfer to described update module to process; Otherwise continued to intercept by the described module of intercepting;
Described update module, for when the non-upset saltus step, getting current reproduction time is fiducial time, getting current pts value is corresponding benchmark pts value, upgrades demonstration and the control of reproduction time and playing progress rate; Stop subsequently intercepting, wait for the EOS/BOS message that described message transmission module sends again until all clips played is complete.
Preferably, in described judge module, according to (| current pts value-front pts value of once intercepting |)/90000, whether be greater than saltus step threshold value and judge whether the variation between twice pts value has exceeded normal counting progression.
Preferably, in described judge module, according to (PTS maximum-| current pts value-front pts value of once intercepting |)/90000, whether be less than saltus step threshold value and judge whether to have occurred upset.
Preferably, in described system, if upset has occurred in judge module judgement, the computing formula of reproduction time becomes:
Reproduction time=fiducial time+and (PTS maximum-| current pts value-benchmark pts value |)/90000.
(3) beneficial effect
Adopt the technical scheme in the embodiment of the present invention, by intercepting PTS, time reference and PTS benchmark that after video clipping fragment is switched, replacement progress is calculated, make still can normally and accurately carry out calculating and the demonstration of playing progress rate after the switching of video clipping fragment.The present invention is by the change of Play System intrinsic program, solve the discontinuous progress causing of each fragment of video clipping PTS and shown chaotic problem, thereby video clipping editor's workload is alleviated greatly, even without the processing that early stage, human-edited integrated, user also can see the progress of video playback normally.
Accompanying drawing explanation
Fig. 1 is the handling process schematic diagram of Streaming Media clips played progress control method in embodiments of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
A kind of playing progress rate management method and system for Streaming Media montage is provided in embodiments of the invention, can be in the situation that the montage of multistage Streaming Media be play continuously, normally and exactly show and control whole playing progress rate.Wherein, Streaming Media is when playing, server can continue transfers data to terminal equipment, after receiving, plays by Play System by terminal equipment, and (be generally to 0 the moment as the fiducial time that starts to play, also can be current absolute time), the pts value of this moment correspondence is as benchmark pts value.In playing process, can be by obtaining current pts value, and call fiducial time value and benchmark pts value carry out calculating and the demonstration of reproduction time and playing progress rate.
First, referring to Fig. 1, in embodiments of the invention, the general step of Streaming Media clips played progress control method is:
While playing multistage montage, when server sends the data of one section of montage, can be simultaneously to terminal send EOS/BOS (End of Segment, section finishes, and shows to arrive the ending of one section of stream medium data; Begin of Segment, section starts, and shows to arrive the beginning of one section of stream medium data) message;
The Play System of terminal learns that according to the message of receiving next section of clip data is about to arrive buffer memory, so start intercepting PTS;
In intercepting process, get at set intervals once current pts value;
Current pts value and front pts value of once intercepting are compared, if the variation between twice pts value has exceeded normal counting progression, and not (because the condition of upset is the maximum that reaches PTS, to be therefore easy to judgement) while there is upset, think that saltus step has occurred PTS; Otherwise continue to intercept;
There is conversion in the content that saltus step situation is judged as to Streaming Media montage, just crossed in other words the border tie point of two sections of montages, now in order not make playing progress bar show, make mistakes, move as follows: getting current reproduction time is fiducial time, getting current pts value is corresponding benchmark pts value, as the calculating benchmark of ensuing playing progress rate; Then stop intercepting and judging, wait for the EOS/BOS message of again receiving server, again move when the time comes above-mentioned flow process, until video clipping finishes.
Wherein, in said method, judge whether PTS the method for saltus step occurs as follows:
When (if | the upper PTS| of current PTS-)/90000 are greater than saltus step threshold value, judge PTS saltus step occurs;
Meanwhile, if when (PTS maximum-| the upper PTS| of current PTS-)/90000 are less than saltus step threshold value, determine that this saltus step is for upset saltus step, otherwise be defined as non-upset saltus step;
Non-upset saltus step is effective saltus step, represents to play to have entered next fragment (can further carry out step of updating); Upset saltus step is invalid saltus step, can not be as the standard of the switching of play content.
Wherein, under normal play state: saltus step threshold value=listening interval time * 2
Under speed broadcast state: saltus step threshold value=broadcasting speed * key frame interval time * 2
In any one video segment, if upset has occurred PTS, the computing formula of reproduction time is replaced by immediately:
Reproduction time=fiducial time+and (PTS maximum-| current pts value-benchmark pts value |)/90000.Till being continued until subsequently that this fragment finishes or determining PTS saltus step occurs.Wherein the PTS maximum in above-mentioned computational process is generally 0x1ffffffff, and the numerical value of this value is larger, conventionally in a fragment, for once reaches at most the situation generation that maximum is overturn.Judge that whether PTS upset (judging based on PTS maximum and current pts value situation of change) has occurred and change progress computing formula when upset occurs PTS is prior art, repeats no more.
In said method, after saltus step, continue to use the computing formula after normal progress computing formula rather than upset, just according to current reproduction time and current pts value again correction reference value.
Below by one more specifically execution mode method of the present invention is described further.To play one section, extract the movie preview film source that many arrangements of mirrors head forms, start anew to play, be 0 second the fiducial time of first paragraph, to being given to benchmark pts value, i.e. stdPTS=162081900 by pts value constantly.In ensuing process, what progress showed is calculated as follows:
Reproduction time=fiducial time+(currentPTS-stdPTS)/90000=0+ (currentPTS-162081900)/90000;
Playing progress rate=reproduction time/video clipping total time.
Normal speed forward is after a period of time, Play System receives the EOS message of server, so starting to carry out PTS intercepts, current broadcast state is normal play, the listening interval time of at this time getting is 0.1 second, so according to the saltus step threshold calculations formula under normal play state, saltus step threshold value threshold=0.1*2=0.2 second.The PTS that intercepts for the first time acquisition is LastPTS=167298300, after 0.1 second, again obtain PTS, obtain currentPTS=167305500, then calculating and the judgement of carrying out saltus step are as follows: computing formula is (currentPTS-LastPTS)/90000=(167305500-167298300)/90000=0.08 second, due to 0.08 second < threshold (0.2 second), there is not saltus step in judgement therefore; The value of currentPTS 167305500 is given to lastPTS, i.e. lastPTS=167305500.
Then continue to intercept, after 0.1 second, listen to current pts value and be given to currentPTS, be currentPTS=167312700, again calculate (currentPTS-LastPTS)/90000=(167312700-167305500)/90000=0.08 second, 0.08 second < threshold, still there is no saltus step, continue to repeat to intercept.
Until when certain is intercepted LastPTS=167478300, during currentPTS=196883100, by formula, calculate (currentPTS-LastPTS)/90000=(196883100-167478300)/90000=326.72 second, due to 326.72 seconds > threshold, according to upset formula, judge and do not overturn again simultaneously, therefore judge that saltus step has occurred pts value, illustrate and be played to next section of video clipping segment contents.Now the value of currentPTS=196883100 is assigned to benchmark pts value, i.e. stdPTS=196883100 now; And the total time value of the video segment having finished playing is assigned to fiducial time, and be 60 seconds here, stop intercepting until again receive EOS message.After during this period of time in the computing formula that shows of (in second video segment) progress be:
Reproduction time=fiducial time+(currentPTS-stdPTS)/90000=60+ (currentPTS-196883100)/90000;
Progress percentage=reproduction time/video clipping total time.
When playing second segment video clipping, reset and started at fiducial value like this, when second video clipping fragment play 1 second, the reproduction time showing is 61 seconds, so the calculating of reproduction time and progress is normally and accurately, is not subject to discontinuous impact of each video clipping fragment PTS.
Then carry out the broadcasting of 8 speeds, second segment is play while closing to an end, Play System is received the EOS message of server again, again starting to carry out PTS intercepts, because current broadcast state is that speed is play, so saltus step threshold calculations formula of playing according to speed, while playing due to speed, key frame is spaced apart 0.2 second, so the listening interval time is got 0.2*2=0.4 second, saltus step threshold value threshold=8*0.2*2=3.2 second, the PTS that intercepts for the first time acquisition is LastPTS=199061100, after 0.4 second, again obtain currentPTS=199233900, according to saltus step discrimination formula, obtain PTS interval (currentPTS-LastPTS)/90000=1.92 second, 1.92 seconds < threshold (3.2 seconds), therefore there is not saltus step, continue to intercept.Until LastPTS=207675900, during currentPTS=216067500, by formula, calculate (currentPTS-LastPTS)/90000=93.24 second, due to 93.24 seconds > threshold, according to upset formula, judge and do not overturn again simultaneously, therefore judge that saltus step has occurred pts value, the value of currentPTS=216067500 is assigned to benchmark PTS, be stdPTS=216067500, the total time value of the video segment having finished playing is assigned to fiducial time simultaneously, broadcasting is switched to the 3rd section of montage.
After playing process in, if also have a plurality of discrete video segments, each can receive EOS message, starts said procedure, above-mentioned action is carried out in circulation, repeats no more.
Wherein, the obtaining of the total time of the video segment having finished playing, as first paragraph 60 seconds, second segment 120 seconds, and whole video clipping total time as 600 seconds, the time value of each section of video is provided by server like this, is prior art, repeats no more.
In normal play situation, carry out the time interval of getting that PTS intercepts very little, be generally 0.1 second, the error between the PTS fiducial value of obtaining and actual montage video PTS initial value, in 0.1 second, can reach the requirement that progress shows.In speed broadcasting situation, the PTS fiducial value of obtaining is relevant with error and speed between actual montage video PTS initial value, and maximum in 3s left and right, because the requirement now progress being shown is not strict especially, this error within the acceptable range.
In addition, one of ordinary skill in the art will appreciate that, the all or part of step realizing in above-described embodiment method is to come the hardware that instruction is relevant to complete by program, described program can be stored in a computer read/write memory medium, this program is when carrying out, each step that comprises above-described embodiment method, and described storage medium can be: ROM/RAM, magnetic disc, CD, storage card etc.Therefore, corresponding with method of the present invention, the present invention also comprises a kind of Streaming Media clips played progress control system simultaneously, and this system represents with the form of the functional module corresponding with each step of method conventionally; Described system comprises message transmission module, intercepts startup module, intercepts module, judge module and update module; Wherein,
Described message transmission module for when playing multistage montage, sends EOS/BOS message to terminal when server sends the data of one section of montage;
The described startup module of intercepting, message initiated the intercepting PTS of EOS/BOS of receiving for basis;
The described module of intercepting, for intercepting process, gets once current pts value at set intervals;
Described judge module, for current pts value and front pts value of once intercepting are compared, if the variation between twice pts value has exceeded normal counting progression, and not while there is upset, think that non-upset saltus step has occurred PTS, transfer to described update module to process; Otherwise continued to intercept by the described module of intercepting;
Described update module, for when the non-upset saltus step, getting current reproduction time is fiducial time, getting current pts value is corresponding benchmark pts value, upgrades demonstration and the control of reproduction time and playing progress rate; Stop subsequently intercepting, wait for the EOS/BOS message that described message transmission module sends again until all clips played is complete.
Wherein, in described judge module, according to (| current pts value-front pts value of once intercepting |)/90000, whether be greater than saltus step threshold value and judge whether the variation between twice pts value has exceeded normal counting progression.According to (PTS maximum-| current pts value-front pts value of once intercepting |)/90000, whether be less than saltus step threshold value and judge whether to have occurred upset.
In described system, if upset has occurred in judge module judgement, the computing formula of reproduction time becomes:
Reproduction time=fiducial time+and (PTS maximum-| current pts value-benchmark pts value |)/90000.
Adopt the technical scheme in the embodiment of the present invention, by intercepting PTS, time reference and PTS benchmark that after video clipping fragment is switched, replacement progress is calculated, make still can normally and accurately carry out calculating and the demonstration of playing progress rate after the switching of video clipping fragment.The present invention is by the change of Play System intrinsic program, solve the discontinuous progress causing of each fragment of video clipping PTS and shown chaotic problem, thereby video clipping editor's workload is alleviated greatly, even without the processing that early stage, human-edited integrated, user also can see the progress of video playback normally.
Above execution mode is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and invention protection range of the present invention should be defined by the claims.
Claims (7)
1. a Streaming Media clips played progress control method, is characterized in that, described method comprises step:
S1, when playing multistage montage, when server sends the data of one section of montage, can finish EOS/ section to terminal delivery section and start BOS message simultaneously;
S2, the Play System of terminal is according to message initiated the intercepting PTS of EOS/BOS of receiving;
S3, in intercepting process, gets once current pts value at set intervals;
S4, compares current pts value and front pts value of once intercepting, if the variation between twice pts value has exceeded normal counting progression, and is not, while there is upset, to think that non-upset saltus step has occurred PTS, execution step S5; Otherwise returning to step S3 continues to intercept;
S5, during non-upset saltus step, getting current reproduction time is fiducial time, getting current pts value is corresponding benchmark pts value, upgrades demonstration and the control of reproduction time and playing progress rate; Stop subsequently intercepting, return to step S1 wait and again receive the EOS/BOS message of server until all clips played is complete;
The decision procedure whether described upset occurs is: if (PTS maximum-| current pts value-front pts value of once intercepting |)/90000 are less than saltus step threshold value, upset has occurred in judgement, otherwise thinks and do not overturn;
The demonstration of described renewal reproduction time and playing progress rate specifically comprises:
The computing formula of reproduction time is:
Reproduction time=fiducial time+(| current pts value-benchmark pts value |)/90000.
2. method according to claim 1, is characterized in that, in step S4, the variation between described twice pts value has exceeded normal counting progression and referred to: (| current pts value-front pts value of once intercepting |)/90000 are greater than saltus step threshold value.
3. method according to claim 1, is characterized in that, if there is upset, the computing formula of reproduction time becomes:
Reproduction time=fiducial time+and (PTS maximum-| current pts value-benchmark pts value |)/90000.
4. method according to claim 1 and 2, is characterized in that, for described saltus step threshold value, has:
Under normal play state: saltus step threshold value=listening interval time * 2;
Under speed broadcast state: saltus step threshold value=broadcasting speed * key frame interval time * 2.
5. a Streaming Media clips played progress control system, is characterized in that, described system comprises message transmission module, intercepts startup module, intercepts module, judge module and update module; Wherein,
Described message transmission module for when playing multistage montage, finishes EOS/ section to terminal delivery section and starts BOS message when server sends the data of one section of montage;
The described startup module of intercepting, message initiated the intercepting PTS of EOS/BOS of receiving for basis;
The described module of intercepting, for intercepting process, gets once current pts value at set intervals;
Described judge module, for current pts value and front pts value of once intercepting are compared, if the variation between twice pts value has exceeded normal counting progression, and not while there is upset, think that non-upset saltus step has occurred PTS, transfer to described update module to process; Otherwise continued to intercept by the described module of intercepting;
Described update module, for when the non-upset saltus step, getting current reproduction time is fiducial time, getting current pts value is corresponding benchmark pts value, upgrades demonstration and the control of reproduction time and playing progress rate; Stop subsequently intercepting, wait for the EOS/BOS message that described message transmission module sends again until all clips played is complete;
In described judge module, according to (PTS maximum-| current pts value-front pts value of once intercepting |)/90000, whether be less than saltus step threshold value and judge whether to have occurred upset;
In described update module, the computing formula of reproduction time is:
Reproduction time=fiducial time+(| current pts value-benchmark pts value |)/90000.
6. system according to claim 5, it is characterized in that, in described judge module, according to (| current pts value-front pts value of once intercepting |)/90000, whether be greater than saltus step threshold value and judge whether the variation between twice pts value has exceeded normal counting progression.
7. system according to claim 5, is characterized in that, in described system, if upset has occurred in judge module judgement, the computing formula of reproduction time becomes:
Reproduction time=fiducial time+and (PTS maximum-| current pts value-benchmark pts value |)/90000.
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| CN105578261B (en) * | 2015-12-18 | 2019-04-26 | 无锡天脉聚源传媒科技有限公司 | A kind of method and apparatus of video clipping |
| 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 |
| CN112133266A (en) * | 2020-09-21 | 2020-12-25 | 腾讯音乐娱乐科技（深圳）有限公司 | Method and device for generating lyric set |
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Effective date of registration: 20170109 Address after: 266100 Shandong Province, Qingdao city Laoshan District Songling Road No. 399 Patentee after: Poly Polytron Technologies Inc Address before: 266071 Laoshan, Qingdao province Hongkong District No. East Road, room 248, room 131 Patentee before: Hisense Media Networks Co., Ltd. |