CN108259964B - Video playing rate adjusting method and system - Google Patents
Video playing rate adjusting method and system Download PDFInfo
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- CN108259964B CN108259964B CN201810063788.9A CN201810063788A CN108259964B CN 108259964 B CN108259964 B CN 108259964B CN 201810063788 A CN201810063788 A CN 201810063788A CN 108259964 B CN108259964 B CN 108259964B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/637—Control signals issued by the client directed to the server or network components
- H04N21/6373—Control signals issued by the client directed to the server or network components for rate control, e.g. request to the server to modify its transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a method and a system for adjusting video playing rate. Firstly, acquiring the time for playing a current frame; comparing the time of the current frame with the corresponding time stamp of the frame to obtain delay time; then, comparing the delay time with a preset range to obtain a comparison result; and finally, adjusting the current playing speed according to the comparison result. According to the method and the system, the current playing speed is accelerated or reduced and the fluency of video playing is improved according to the difference value between the timestamp and the current playing time.
Description
Technical Field
The present invention relates to the field of network video playing, and in particular, to a method and a system for adjusting a video playing rate.
Background
The real-time plug flow of the remote video of the internet can be influenced by various factors, so that the phenomena of video packet loss, receiving delay and the like occur, and the effect of reflecting the video picture is delay and blockage. The playing method used by the playing software in the market at present is to play according to the time stamp of the image as a reference, but the video pause problem caused by data packet loss and receiving delay due to network or other factors cannot be handled in this way.
Disclosure of Invention
The invention aims to provide a video playing speed adjusting method and a video playing speed adjusting system, which are used for improving the picture pause phenomenon and optimizing the smoothness of the whole video playing process.
In order to achieve the purpose, the invention provides the following scheme:
a video playing rate adjusting method comprises the following steps:
acquiring the time for playing the current frame;
comparing the time of the current frame with the corresponding time stamp of the frame to obtain delay time;
comparing the delay time with a preset range to obtain a comparison result;
and adjusting the current playing speed according to the comparison result.
Optionally, the comparing the delay time with a preset range to obtain a comparison result specifically includes:
comparing the delay time with a first preset range: if the delay time is smaller than the minimum value of the first preset range, the comparison result is an advance delay; if the delay time is larger than the maximum value of the first preset range, the comparison result is lag delay;
if the delay time is greater than or equal to the minimum value of the first preset range and less than or equal to the maximum value of the first preset range, comparing the delay time with a second preset range: if the delay time is smaller than the minimum value of the second preset range or the delay time is larger than the maximum value of the second preset range, the comparison result is small delay; and if the delay time is greater than the minimum value of the second preset range and less than the maximum value of the second preset range, the comparison result is no delay.
Optionally, the adjusting the current video playing speed according to the comparison result specifically includes:
when the comparison result is the advance delay, reducing the current playing speed;
when the comparison result is the lag delay, increasing the current playing speed;
when the comparison result is small delay, if the last operation is to reduce the playing speed, the current playing speed is increased, and if the last operation is to increase the playing speed, the current playing speed is reduced;
and when the comparison result shows that no delay exists, the current playing speed is not changed.
Optionally, the obtaining the time for playing the current frame further includes:
in the process of live broadcasting of videos, decoding the H264 format audio and video stream obtained from the controller by using an RTMP (real time Messaging protocol) stream media protocol to obtain a data packet;
and analyzing the data packet to obtain audio and video data and a time stamp.
Optionally, the current playing speed is greater than or equal to 10 frames/second.
A video playback rate adjustment system, the adjustment system comprising:
the time acquisition module is used for acquiring the time for playing the current frame;
the delay time acquisition module is used for comparing the time for playing the current frame with the time stamp corresponding to the frame to acquire delay time;
the comparison result acquisition module is used for comparing the delay time with a preset range to obtain a comparison result;
and the playing rate adjusting module is used for adjusting the current playing rate according to the comparison result.
Optionally, the comparison result obtaining module specifically includes:
a first comparison result obtaining submodule, configured to compare the delay time with a first preset range: if the delay time is smaller than the minimum value of the first preset range, the comparison result is an advance delay; if the delay time is larger than the maximum value of the first preset range, the comparison result is lag delay;
a second comparison result obtaining sub-module, configured to compare the delay time with a second preset range if the delay time is greater than or equal to a minimum value of the first preset range and less than or equal to a maximum value of the first preset range: if the delay time is smaller than the minimum value of the second preset range or the delay time is larger than the maximum value of the second preset range, the comparison result is small delay; and if the delay time is greater than the minimum value of the second preset range and less than the maximum value of the second preset range, the comparison result is no delay.
Optionally, the play rate adjusting module specifically includes:
the first rate adjustment submodule is used for reducing the current playing rate when the comparison result is the advance delay;
a second rate adjustment submodule, configured to increase a current play rate when the comparison result is a lag delay;
a third rate adjustment submodule, configured to increase the current play rate if the last operation is to decrease the play rate when the comparison result is a small delay, and decrease the current play rate if the last operation is to increase the play rate;
and the fourth rate adjusting submodule is used for not changing the current playing rate when the comparison result is that no delay exists.
Optionally, the rate adjustment system further includes:
a data packet acquisition module for decoding the H264 format audio/video stream obtained from the controller by using RTMP streaming media protocol in the process of live broadcasting video to obtain a data packet,
and the data packet analysis module is used for analyzing the data packet to obtain audio and video data and a timestamp.
Optionally, the current play rate in the play rate adjustment module is greater than or equal to 10 frames/second.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a video playing speed adjusting method and a video playing speed adjusting system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a flowchart of a video playing rate adjusting method according to the present invention;
FIG. 2 is a flowchart illustrating a method for adjusting a video playback rate according to another embodiment of the present invention;
fig. 3 is a block diagram of a video playing rate adjusting system according to the present invention.
Detailed Description
The invention aims to provide a video playing speed adjusting method and a video playing speed adjusting system, which are used for improving the picture pause phenomenon and optimizing the smoothness of the whole video playing process.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the present invention provides a video playing rate adjusting method, which includes the following steps:
102, comparing the time of the current frame with a timestamp corresponding to the frame to obtain delay time;
and 104, adjusting the current playing speed according to the comparison result.
Optionally, the step 103 of comparing the delay time with a preset range to obtain a comparison result specifically includes:
comparing the delay time with a first preset range: if the delay time is smaller than the minimum value of the first preset range, the comparison result is an advance delay; if the delay time is larger than the maximum value of the first preset range, the comparison result is lag delay;
if the delay time is greater than or equal to the minimum value of the first preset range and less than or equal to the maximum value of the first preset range, comparing the delay time with a second preset range: if the delay time is smaller than the minimum value of the second preset range or the delay time is larger than the maximum value of the second preset range, the comparison result is small delay; and if the delay time is greater than the minimum value of the second preset range and less than the maximum value of the second preset range, the comparison result is no delay.
Optionally, the adjusting the current video playing speed according to the comparison result in step 104 specifically includes:
when the comparison result is the advance delay, reducing the current playing speed;
when the comparison result is the lag delay, increasing the current playing speed;
when the comparison result is small delay, if the last operation is to reduce the playing speed, the current playing speed is increased, and if the last operation is to increase the playing speed, the current playing speed is reduced;
and when the comparison result shows that no delay exists, the current playing speed is not changed.
Optionally, before the acquiring the time for playing the current frame in step 101, the method further includes:
in the process of live broadcasting of videos, decoding the H264 format audio and video stream obtained from the controller by using an RTMP (real time Messaging protocol) stream media protocol to obtain a data packet;
and analyzing the data packet to obtain audio and video data and a time stamp.
Optionally, the current playing speed is greater than or equal to 10 frames/second.
As shown in fig. 2, another embodiment of a method for adjusting a video playing rate according to the present invention includes:
in the live video, an RTMP streaming media protocol is used for decoding the H264 format audio and video stream obtained from the controller to obtain a series of data packets, and audio and video data and timestamps are analyzed from the data packets.
Comparing the timestamp of each frame with the playing progress to determine whether the video playing is delayed, wherein the delay is determined by comparing the currently loaded "total duration of video buffer" (i.e., "total duration" is uniformly used in this embodiment) with the "minimum delay duration" set by itself (i.e., "delay-limited duration" is uniformly used in this embodiment), if the video playing is delayed, the next frame is called faster, the rate change is in units of 0.01 seconds, and the specific determination process is as follows:
1) if "total duration" > "delay limit duration" +0.1 seconds, then accelerate for 0.01 seconds, and mark operation as acceleration.
2) If the "total duration" < "delay limit duration" -0.1 second, then the deceleration is 0.01 second, and the marking operation is deceleration.
3) When the "total time length" is between the two, if the last operation is acceleration, the deceleration is started for 0.01 second, whereas if the last operation is deceleration, the acceleration is started for 0.01 second. If the 'total duration' is already in the 'delay limit duration' -0.05 seconds to the 'delay limit duration' +0.05 seconds, the operation is set to stop, that is, the playing speed is not changed any more.
As shown in fig. 3, the present invention further provides a video playing rate adjusting system, which includes:
a time obtaining module 301, configured to obtain a time for playing a current frame;
a delay time obtaining module 302, configured to compare the time for playing the current frame with a timestamp corresponding to the frame, and obtain a delay time;
a comparison result obtaining module 303, configured to compare the delay time with a preset range, and obtain a comparison result;
and a playing rate adjusting module 304, configured to adjust the current playing rate according to the comparison result.
Optionally, the comparison result obtaining module 303 specifically includes:
a first comparison result obtaining submodule, configured to compare the delay time with a first preset range: if the delay time is smaller than the minimum value of the first preset range, the comparison result is an advance delay; if the delay time is larger than the maximum value of the first preset range, the comparison result is lag delay;
a second comparison result obtaining sub-module, configured to compare the delay time with a second preset range if the delay time is greater than or equal to a minimum value of the first preset range and less than or equal to a maximum value of the first preset range: if the delay time is smaller than the minimum value of the second preset range or the delay time is larger than the maximum value of the second preset range, the comparison result is small delay; and if the delay time is greater than the minimum value of the second preset range and less than the maximum value of the second preset range, the comparison result is no delay.
Optionally, the play rate adjusting module 304 specifically includes:
the first rate adjustment submodule is used for reducing the current playing rate when the comparison result is the advance delay;
a second rate adjustment submodule, configured to increase a current play rate when the comparison result is a lag delay;
a third rate adjustment submodule, configured to increase the current play rate if the last operation is to decrease the play rate when the comparison result is a small delay, and decrease the current play rate if the last operation is to increase the play rate;
and the fourth rate adjusting submodule is used for not changing the current playing rate when the comparison result is that no delay exists.
Optionally, the rate adjustment system further includes:
and the data packet acquisition module is used for decoding the H264 format audio and video stream obtained from the controller by using an RTMP streaming media protocol in the process of live broadcasting the video to obtain a data packet.
And the data packet analysis module is used for analyzing the data packet to obtain audio and video data and a timestamp.
Optionally, the current play rate in the play rate adjustment module is greater than or equal to 10 frames/second.
The invention discloses a video playing speed adjusting method and a video playing speed adjusting system.
The invention optimizes video playing on the client, fills up the fault picture through small speed change which can not be perceived by human eyes, restores the pause feeling of the video due to the frame rate of less than 10, and can also solve the problem that when a large amount of caches are increased instantly due to network blockage, the cache area is optimized through the speed change which can not be perceived by human eyes and the accelerated consumption.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principle and the implementation manner of the present invention are explained by applying specific examples, the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof, the described embodiments are only a part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.
Claims (6)
1. A video playing rate adjusting method is characterized by comprising the following steps:
acquiring the time for playing the current frame;
comparing the time of the current frame with the corresponding time stamp of the frame to obtain delay time;
comparing the delay time with a preset range to obtain a comparison result;
adjusting the current playing speed according to the comparison result;
comparing the delay time with a preset range to obtain a comparison result, specifically comprising:
comparing the delay time with a first preset range: if the delay time is smaller than the minimum value of the first preset range, the comparison result is an advance delay; if the delay time is larger than the maximum value of the first preset range, the comparison result is lag delay;
if the delay time is greater than or equal to the minimum value of the first preset range and less than or equal to the maximum value of the first preset range, comparing the delay time with a second preset range: if the delay time is smaller than the minimum value of the second preset range or the delay time is larger than the maximum value of the second preset range, the comparison result is small delay; if the delay time is greater than the minimum value of the second preset range and less than the maximum value of the second preset range, the comparison result is no delay;
the adjusting the current video playing speed according to the comparison result specifically includes:
when the comparison result is the advance delay, reducing the current playing speed;
when the comparison result is the lag delay, increasing the current playing speed;
when the comparison result is small delay, if the last operation is to reduce the playing speed, the current playing speed is increased, and if the last operation is to increase the playing speed, the current playing speed is reduced;
and when the comparison result shows that no delay exists, the current playing speed is not changed.
2. The method of claim 1, wherein the obtaining the time for playing the current frame is preceded by:
in the process of live broadcasting of videos, decoding the H264 format audio and video stream obtained from the controller by using an RTMP (real time Messaging protocol) stream media protocol to obtain a data packet;
and analyzing the data packet to obtain audio and video data and a time stamp.
3. The video playback rate adjustment method of claim 1, wherein the current playback rate is greater than or equal to 10 frames/sec.
4. A video playback rate adjustment system, the adjustment system comprising:
the time acquisition module is used for acquiring the time for playing the current frame;
the delay time acquisition module is used for comparing the time for playing the current frame with the time stamp corresponding to the frame to acquire delay time;
the comparison result acquisition module is used for comparing the delay time with a preset range to obtain a comparison result;
the playing rate adjusting module is used for adjusting the current playing rate according to the comparison result;
the comparison result obtaining module specifically includes:
a first comparison result obtaining submodule, configured to compare the delay time with a first preset range: if the delay time is smaller than the minimum value of the first preset range, the comparison result is an advance delay; if the delay time is larger than the maximum value of the first preset range, the comparison result is lag delay;
a second comparison result obtaining sub-module, configured to compare the delay time with a second preset range if the delay time is greater than or equal to a minimum value of the first preset range and less than or equal to a maximum value of the first preset range: if the delay time is smaller than the minimum value of the second preset range or the delay time is larger than the maximum value of the second preset range, the comparison result is small delay; if the delay time is greater than the minimum value of the second preset range and less than the maximum value of the second preset range, the comparison result is no delay;
the play rate adjustment module specifically includes:
the first rate adjustment submodule is used for reducing the current playing rate when the comparison result is the advance delay;
a second rate adjustment submodule, configured to increase a current play rate when the comparison result is a lag delay;
a third rate adjustment submodule, configured to increase the current play rate if the last operation is to decrease the play rate when the comparison result is a small delay, and decrease the current play rate if the last operation is to increase the play rate;
and the fourth rate adjusting submodule is used for not changing the current playing rate when the comparison result is that no delay exists.
5. The video playback rate adjustment system of claim 4, wherein the rate adjustment system further comprises:
the data packet acquisition module is used for decoding the H264 format audio and video stream obtained from the controller by using an RTMP streaming media protocol in the process of live broadcasting the video to obtain a data packet;
and the data packet analysis module is used for analyzing the data packet to obtain audio and video data and a timestamp.
6. The video playback rate adjustment system of claim 4, wherein the current playback rate in the playback rate adjustment module is greater than or equal to 10 frames/sec.
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| CN108966028B (en) * | 2018-08-17 | 2021-04-30 | 上海悠络客电子科技股份有限公司 | Anti-jitter method for dynamically adjusting play speed based on network condition |
| CN110856028B (en) * | 2018-08-20 | 2021-12-14 | 上海途擎微电子有限公司 | Media data playing method, equipment and storage medium |
| CN109194975B (en) * | 2018-11-02 | 2021-04-20 | 深圳市云威物联科技有限公司 | Audio and video live broadcast stream following method and device |
| CN109769140A (en) * | 2018-12-20 | 2019-05-17 | 南京杰迈视讯科技有限公司 | A kind of network video smoothness control method for playing back based on stream media technology |
| CN110597481A (en) * | 2019-09-24 | 2019-12-20 | 苏州随身玩信息技术有限公司 | Self-adaptive switching method for playing speed of explanation content and tour guide explanation machine |
| CN112516598B (en) * | 2020-11-20 | 2024-05-28 | 网易（杭州）网络有限公司 | Game service fault processing method, device, server and medium |
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