CN110730358A - Live video time shifting control method, terminal and storage medium - Google Patents
Live video time shifting control method, terminal and storage medium Download PDFInfo
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- CN110730358A CN110730358A CN201810777057.0A CN201810777057A CN110730358A CN 110730358 A CN110730358 A CN 110730358A CN 201810777057 A CN201810777057 A CN 201810777057A CN 110730358 A CN110730358 A CN 110730358A
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
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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
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
- H04L65/612—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
-
- 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
- H04L65/80—Responding to QoS
-
- 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
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
The invention discloses a control method, a terminal and a storage medium for live video time shifting, which are characterized in that TS (transport stream) slices contained in a live video stream M3U8 file are identified and marked, and the duration of each TS slice is recorded; calculating a corresponding positioning time point on a TS (transport stream) stream slice according to a video playing time point corresponding to a received user dragging instruction, a calculated TS stream slice mark number and a TS stream slice duration corresponding to the TS stream slice mark number; and performing time-shift playing control according to the calculated TS stream slice mark number and the positioning time point. According to the method, the terminal and the storage medium, the TS stream in the video stream is identified, and after the TS stream is analyzed, the live video is time-shifted and played according to the pushing of the user to the progress bar, so that the requirement that the user can watch the video in any time period before the live video at will is met, and convenience is brought to the video watching of the user.
Description
Technical Field
The present invention relates to the technical field of video playing processing, and in particular, to a method, a terminal, and a storage medium for controlling time shifting of a live video.
Background
At present, video playing becomes a necessary function of all terminal intelligent platforms, cool and colorful visual experience is brought to users, and the functions are more and more abundant; more and more open source video players are provided for android platforms on the network, such as ijkPlayer, ExoPlayer, GSYVideoPlayer, JieCaoVideoPlayer, PLDroidPlayer and the like, which all have normal live broadcast and on-demand functions, when video is played, a user can drag a current film at will and watch the current film from any time, but when the video is played directly, the user cannot drag the current film and can only watch the video at the current playing time, but at some time, the user wants to watch the live broadcast program, the user can drag the current film back, and the current program can be dragged at will within the played time, that is, the time-shifting function is achieved, and under general conditions, the players do not support the video players.
Therefore, the prior art is subject to further improvement.
Disclosure of Invention
In view of the foregoing disadvantages in the prior art, an object of the present invention is to provide a method, a terminal, and a storage medium for controlling time shifting of a live video for a user, which overcome the defect that a video player provided by an android platform in the prior art does not have a time shifting function.
A first embodiment provided by the present invention is a method for controlling time shift of a live video, including: identifying and marking TS (transport stream) slices contained in a live video stream M3U8 file, and recording the duration of each TS slice;
calculating a TS stream slice mark number corresponding to the video playing time point according to the video playing time point corresponding to the received user dragging instruction, and calculating a corresponding positioning time point on the TS stream slice according to the calculated TS stream slice mark number and the TS stream slice time length corresponding to the TS stream slice mark number;
and performing time-shift playing control according to the calculated TS stream slice mark number and the positioning time point.
Optionally, the steps further include:
acquiring a live video stream M3U8 file, and checking whether the format of the M3U8 file is standard;
if the standard is satisfied, the M3U8 file is read, and TS stream slice information contained in the file is recorded.
Optionally, the steps further include:
and when the M3U8 file is read, if the end of directory identifier is not detected, setting that the total duration of video playing of the current live video stream M3U8 file is not recorded.
Optionally, before the step of identifying and marking a TS stream slice contained in a live video stream M3U8 file, the method further includes:
the number of TS stream slices contained in the file identifying and marking the live video stream M3U8 by default is set to an unlimited number.
Optionally, the method further includes:
and setting the progress bar in the current live broadcast state to be draggable.
A second embodiment provided by the present invention is a live video playing terminal, where the live video playing terminal includes a processor, a memory, and a live video time shift control program that is stored in the memory and can be run on the processor, where the live video time shift control program implements the following steps when executed by the processor:
identifying and marking TS (transport stream) slices contained in a live video stream M3U8 file, and recording the duration of each TS slice;
calculating a TS stream slice mark number corresponding to the video playing time point according to the video playing time point corresponding to the received user dragging instruction, and calculating a corresponding positioning time point on the TS stream slice according to the calculated TS stream slice mark number and the TS stream slice time length corresponding to the TS stream slice mark number;
and performing time-shift playing control according to the calculated TS stream slice mark number and the positioning time point.
Optionally, when executed by the processor, the control program for time shifting of live video further implements the following steps:
acquiring a live video stream M3U8 file, and checking whether the format of the M3U8 file is standard;
if the standard is satisfied, the M3U8 file is read, and TS stream slice information contained in the file is recorded.
Optionally, when executed by the processor, the control program for time shifting of live video further implements the following steps:
when the M3U8 file is read, if the end of directory identification is not detected, setting that the total duration of video playing of the current live video stream M3U8 file is not recorded;
setting the number of TS stream slices contained in the default identified and marked live video stream M3U8 file as an unlimited number;
and setting the progress bar in the current live broadcast state to be draggable.
The third embodiment provided by the invention is as follows: a computer-readable storage medium, wherein a live video time shift control program is stored on the computer-readable storage medium, and when being executed by a processor, the live video time shift control program implements the steps of the live video time shift control method.
The method, the terminal and the storage medium for controlling the time shifting of the live video have the advantages that TS (transport stream) slices contained in the M3U8 file of the live video stream are identified and marked, and the time length of each TS slice is recorded; calculating a TS stream slice mark number corresponding to the video playing time point according to the video playing time point corresponding to the received user dragging instruction, and calculating a corresponding positioning time point on the TS stream slice according to the calculated TS stream slice mark number and the TS stream slice time length corresponding to the TS stream slice mark number; and performing time-shift playing control according to the calculated TS stream slice mark number and the positioning time point. According to the method, the terminal and the storage medium, the TS stream in the video stream is identified, and after the TS stream is analyzed, the live video is time-shifted and played according to the pushing of the user to the progress bar, so that the requirement that the user can watch the video in any time period before the live video at will is met, and convenience is brought to the video watching of the user.
Drawings
FIG. 1 is a flow chart illustrating the steps of a method for controlling time shifting of live video according to the present invention;
FIG. 2 is an overall block diagram of the control method of the present invention;
FIG. 3 is a flowchart illustrating the steps of reading the M3U8 file in the control method according to the present invention;
fig. 4 is a schematic structural diagram of a live video playing terminal according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
According to the method and the terminal provided by the invention, an open source video player ijkPlayer is selected, and the function of time shifting under the live broadcast condition can be achieved by properly modifying the logic of analyzing and processing the M3U8 file under the live broadcast condition. Specifically, a first embodiment provided by the present invention is a method for controlling time shift of a live video, as shown in fig. 1, including:
and step S1, identifying and marking TS stream slices contained in the live video stream M3U8 file, and recording the duration of each TS stream slice.
Because the M3U8 file is an M3U file in UTF-8 encoding format, and the M3U file records an index plain text file, when the index plain text file is opened, the playing software does not play the file, but finds the network address of the corresponding audio/video file according to the index to play online, in this step, the acquired M3U8 file is firstly identified to acquire the information of the TS stream slice contained therein, and the next playing control is performed according to the acquired TS stream slice.
The program Stream (TS, Transport Stream) has a fixed packet length of 188 bytes, and the fixed packet length of the TS Stream has the advantages of being convenient for finding the start position of a frame, easy to recover from packet loss, and suitable for an environment with errors. The video information contained in the TS stream slice is analyzed according to the byte information contained in the 188 bytes of the TS stream slice.
Step S2, calculating a TS stream slice flag corresponding to the video playing time point according to the video playing time point corresponding to the received user dragging instruction, and calculating a corresponding positioning time point on the TS stream slice according to the calculated TS stream slice flag and the time length of the TS stream slice corresponding to the TS stream slice flag.
When a dragging instruction of a progress bar sent by a user is received, a playing time point corresponding to the dragging instruction of the user is obtained, a video key frame corresponding to the playing time point is obtained according to the playing time point, and a TS stream slice mark number corresponding to the current video key frame is calculated according to the current video key frame, so that the time point on the TS stream slice under the mark number corresponding to the current dragging instruction is accurately positioned, and the corresponding positioning time point on the TS stream slice is calculated.
And step S3, performing time shift playing control according to the calculated TS stream slice mark number and the positioning time point.
After the TS stream slice corresponding to the dragged position and the positioning time point corresponding to the TS stream slice are accurately positioned in step S2, the TS stream slices are sequentially played according to the playing sequence of the mark numbers corresponding to the TS stream slices.
The step mainly completes the logic processing when the SeekBar is dragged, finds the video key frame corresponding to the time point according to the time point dragged by the user, calculates the serial number of the corresponding TS stream slice at the time point and returns.
Optionally, the method further includes:
and setting the progress bar in the current live broadcast state to be draggable.
Since the dragging is not allowed by default in the live broadcast case, the following changes are required:
if ((flags&AVSEEK_FLAG_BYTE) /* || !c->variants[c->first_valid_variant]->finished*/ )
return AVERROR(ENOSYS);
specifically, as shown in fig. 2, the main steps included in the embodiment of the disclosed method are shown, wherein the video displays: and the corresponding video display module is mainly used for a video player interface. The video display module mainly comprises: M3U8 format detection module: this module mainly checks the format of the M3U8 file. Reading an M3U8 file: the module mainly reads the M3U8 file corresponding to the M3U8 file reading module. And (3) TS stream slice analysis: the module mainly analyzes the TS stream slice in the M3U8 file, corresponding to the TS stream slice analyzing module. And the dragging analysis module corresponds to the dragging analysis module and is mainly used for processing the logic during dragging.
Further, in order to accurately locate and play the video contained in the M3U8 file in the step of reading the M3U8 file, the steps further include:
acquiring a live video stream M3U8 file, and checking whether the format of the M3U8 file is standard;
if the standard is satisfied, the M3U8 file is read, and TS stream slice information contained in the file is recorded.
Specifically, referring to fig. 3, a flowchart of steps of reading the M3U8 file in the embodiment is shown, and the steps include:
step H21, acquiring the M3U8 file and starting to read file information;
step H22, judging whether the M3U8 file starts with # EXTM3U, if so, indicating that the file format is accurate, and executing step H23; otherwise, repeating the step;
step H23, reading the M3U8 files line by line;
step H24, identifying the last line, or judging whether a # EXT-XENDUST identifier is detected, if so, judging that the current M3U8 file is not a live video file, executing step H25, and if not, repeating the step if the current M3U8 file is not a live video file;
step H25, record the total duration and set the variable for recording the current TS stream slice as the first TS stream slice.
And step H26, reading is finished.
When recording the TS stream slice information in the above step, the method further includes:
and when the M3U8 file is read, if the end of directory identifier is not detected, setting that the total duration of video playing of the current live video stream M3U8 file is not recorded.
Recording the detailed information of each TS stream slice; starting from the "# EXTM 3U" string, when "# EXT INF:" is recognized, the current TS stream is marked as one of the slices, and its duration is recorded:
if (av_strstart(line, "#EXTINF:",&ptr)) {1
is_segment = 1;
duration = atof(ptr) * AV_TIME_BASE;
}
the current step is circulated until "# EXT-X-ENDLIST" is identified, and the current M3U8 file is marked to be completely read;
if (av_strstart(line, "#EXT-X-ENDLIST",&ptr)) {
if (var)
var->finished = 1;
}
if after the whole M3U8 file is completely read, the "# EXT-X-end stream" is still not detected, indicating that the file is a live stream (live stream), and one of the changes to be made at this time is to release the condition of recording the total duration, namely to modify the program code of the original recording total duration into the following program code:
if (true /*c->variants[c->first_valid_variant]->finished*/ ) {
int64_t duration = 0;
for (i = 0; i<c->variants[c->first_valid_variant]->n_segments;i++)
duration += c->variants[c->first_valid_variant]->segments[i]->duration;
s->duration = duration;
}
preferably, before the step of identifying and marking a TS stream slice contained in a live video stream M3U8 file, the method further includes:
the number of TS stream slices contained in the file identifying and marking the live video stream M3U8 by default is set to an unlimited number.
Meanwhile, as the live stream only analyzes the last three TS stream slices in the whole M3U8 file by default, and we need to let the player analyze all TS stream slices, the code limiting the number of TS stream slices to be analyzed originally needs to be modified into the following program code:
/* if (!v->finished&&v->n_segments>3)
v->cur_seq_no = v->start_seq_no + v->n_segments - 3; */
the second embodiment provided by the invention is as follows: a live video playing terminal, as shown in fig. 4, the live video playing terminal includes a processor, a memory, and a live video time-shifting control program stored in the memory and operable on the processor, where the live video time-shifting control program, when executed by the processor, implements the following steps:
identifying and marking TS (transport stream) slices contained in a live video stream M3U8 file, and recording the duration of each TS slice;
calculating a TS stream slice mark number corresponding to the video playing time point according to the video playing time point corresponding to the received user dragging instruction, and calculating a corresponding positioning time point on the TS stream slice according to the calculated TS stream slice mark number and the TS stream slice time length corresponding to the TS stream slice mark number;
and performing time-shift playing control according to the calculated TS stream slice mark number and the time point corresponding to the TS stream slice time length.
Further, the control program for time shifting the live video, when executed by the processor, further implements the following steps:
acquiring a live video stream M3U8 file, and checking whether the format of the M3U8 file is standard;
if the standard is satisfied, the M3U8 file is read, and TS stream slice information contained in the file is recorded.
Further, the control program for time shifting the live video, when executed by the processor, further implements the following steps:
when the M3U8 file is read, if the end of directory identification is not detected, setting that the total duration of video playing of the current live video stream M3U8 file is not recorded;
setting the number of TS stream slices contained in the default identified and marked live video stream M3U8 file as an unlimited number;
and setting the progress bar in the current live broadcast state to be draggable.
The third embodiment provided by the invention is as follows: a computer-readable storage medium, wherein a live video time shift control program is stored on the computer-readable storage medium, and when being executed by a processor, the live video time shift control program implements the steps of the live video time shift control method.
The memory, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the control program or module for time shifting of live video in embodiments of the present invention. The processor executes various functional applications and data processing of the computer device by running the nonvolatile software program, instructions and modules stored in the memory, that is, the functions of the industrial equipment management device or the intelligent terminal in the above method embodiments are realized.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data used or received by the industrial equipment management method, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.
The computer equipment can execute the method provided by the embodiment of the invention and has corresponding functional modules and beneficial effects for executing the method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
The invention discloses a method, a terminal and a storage medium for controlling time shifting of live video, which are characterized in that information and time length of TS (transport stream) slices contained in a live video stream M3U8 file are identified and marked; according to a video playing time point corresponding to a received user dragging instruction, calculating a TS stream slice mark number corresponding to the time point and a positioning time point on the TS stream slice; and performing time-shift playing control according to the TS stream slice mark number and the positioning time point. According to the method, the terminal and the storage medium, the TS stream in the video stream is identified, and after the TS stream is analyzed, the live video is time-shifted and played according to the pushing of the user to the progress bar, so that the requirement that the user can watch the video in any time period before the live video at will is met, and convenience is brought to the video watching of the user.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (9)
1. A method for controlling time shifting of live video is characterized by comprising the following steps:
identifying and marking TS (transport stream) slices contained in a live video stream M3U8 file, and recording the duration of each TS slice;
calculating a TS stream slice mark number corresponding to the video playing time point according to the video playing time point corresponding to the received user dragging instruction, and calculating a corresponding positioning time point on the TS stream slice according to the calculated TS stream slice mark number and the TS stream slice time length corresponding to the TS stream slice mark number;
and performing time-shift playing control according to the calculated TS stream slice mark number and the positioning time point.
2. The method for controlling time shifting of live video according to claim 1, wherein said steps further comprise:
acquiring a live video stream M3U8 file, and checking whether the format of the M3U8 file is standard;
if the standard is satisfied, the M3U8 file is read, and TS stream slice information contained in the file is recorded.
3. The method for controlling time shifting of live video according to claim 1, wherein said steps further comprise:
and when the M3U8 file is read, if the end of directory identifier is not detected, setting that the total duration of video playing of the current live video stream M3U8 file is not recorded.
4. The method for controlling time shifting of live video according to claim 1, wherein before the step of identifying and marking TS stream slices contained in the live video stream M3U8 file, the method further comprises:
the number of TS stream slices contained in the file identifying and marking the live video stream M3U8 by default is set to an unlimited number.
5. The method for controlling time shifting of live video according to claim 1, further comprising:
and setting the progress bar in the current live broadcast state to be draggable.
6. A live video playback terminal, comprising a processor, a memory, and a live video time-shift control program stored in the memory and executable on the processor, wherein the live video time-shift control program, when executed by the processor, implements the following steps:
identifying and marking TS (transport stream) slices contained in a live video stream M3U8 file, and recording the duration of each TS slice;
calculating a TS stream slice mark number corresponding to the video playing time point according to the video playing time point corresponding to the received user dragging instruction, and calculating a corresponding positioning time point on the TS stream slice according to the calculated TS stream slice mark number and the TS stream slice time length corresponding to the TS stream slice mark number;
and performing time-shift playing control according to the calculated TS stream slice mark number and the positioning time point.
7. The live video playback terminal of claim 6, wherein the control program for time shifting the live video when executed by the processor further performs the steps of:
acquiring a live video stream M3U8 file, and checking whether the format of the M3U8 file is standard;
if the standard is satisfied, the M3U8 file is read, and TS stream slice information contained in the file is recorded.
8. The live video playback terminal of claim 6, wherein the control program for time shifting the live video when executed by the processor further performs the steps of:
when the M3U8 file is read, if the end of directory identification is not detected, setting that the total duration of video playing of the current live video stream M3U8 file is not recorded;
setting the number of TS stream slices contained in the default identified and marked live video stream M3U8 file as an unlimited number;
and setting the progress bar in the current live broadcast state to be draggable.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a live video time shift control program, which when executed by a processor implements the steps of the live video time shift control method as claimed in any one of claims 1 to 5.
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| CN112637669A (en) * | 2020-12-18 | 2021-04-09 | 北京浪潮数据技术有限公司 | Streaming media data processing method and related device |
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