WO2018095302A1

WO2018095302A1 - Method and system for displaying video file recorded on set-top box

Info

Publication number: WO2018095302A1
Application number: PCT/CN2017/111944
Authority: WO
Inventors: 姚小伟
Original assignee: 深圳创维数字技术有限公司
Priority date: 2016-11-22
Filing date: 2017-11-20
Publication date: 2018-05-31
Also published as: CN106559697A; CN106559697B

Abstract

A method and system for displaying a video file recorded on a set-top box. The method comprises: upon detecting that a PVR recording control interface is initiated on the PVR set-top box, acquiring a recorded video file, and determining whether the recorded video file has a thumbnail image; if so, displaying the thumbnail image as a video thumbnail of the recorded video file; otherwise, obtaining a video frame of the recorded video file, and after a valid video frame is obtained, storing, according to a specific image format, the valid video frame into a specified folder, and displaying the obtained valid video frame as the video thumbnail of the recorded video file.

Description

Display method and system for recording video file of set top box

Technical field

The present disclosure relates to the field of set top box technologies, for example, to a display method and system for recording video files of a set top box.

Background technique

Digital TV is popular among people for its rich programs and diversified functions, attracting more and more users. For users who watch TV, such a rich digital program is not overwhelming. In order to look back later, video recording of the program is required.

Personal Video Record (PVR) can help the user to record the program that the user who is currently playing likes to watch, or pre-record the program for a certain period of time to be played.

In general, we name the recorded file by the time of recording + the name of the recorded event, so that we can retrieve the recorded file and select the file to play in the PVR recording management interface of the set-top box. The traditional PVR recording management interface presents the recorded file information through a file list. As shown in FIG. 1, the display mode when the video file is recorded in the related art is mainly displayed in the form of a file list. As shown in Figure 1, the central one program has a recording time of 20160801 and a program name of 152122. It also displays the channel name, the date of recording, and the duration of the video.

The file list presentation format of the traditional PVR recording management interface is too simple and single. The following problems exist: only the recording time and the recording event are not easy to distinguish the difference between different videos. After the time is too long, the user easily forgets to record the content of the program, and If an old person or a child cannot recognize the recorded event name and thus cannot obtain the recorded program that he or she needs to view, it brings great inconvenience to the user.

Summary of the invention

The present disclosure provides a method and system for displaying a recorded video file of a set top box, which aims to solve the problem that the existing recording management interface in the related art is displayed in the form of a file list, and it is difficult to distinguish the difference between different videos, which brings great The inconvenience of the technical problem.

The present disclosure provides a method for displaying a recorded video file of a set top box, including:

When detecting that the personal video recording PVR set top box enters the PVR recording management interface, obtain information of the recorded video file, and determine whether there is a thumbnail in the information of the recorded video file;

When there is already a thumbnail in the information of the recorded video file, the thumbnail is displayed as the cover of the recorded video file;

When there is no thumbnail in the information of the recorded video file, the video frame of the recorded video file is captured, and after the valid video frame is captured, the valid video frame is classified according to a specific image format. The storage is stored in the specified cache directory, and the captured valid video frame is displayed as the cover of the recorded video file.

Optionally, when there is no thumbnail in the information of the recorded video file, the video frame of the recorded video file is captured, and after the valid video frame is captured, the effective video is captured. The step of storing the frame in the specified cache format to the specified cache directory and displaying the captured valid video frame as the cover of the recorded video file includes:

When it is detected that there is no thumbnail in the information of the recorded video file, acquiring a preset picture as a cover of the recorded video file for display;

After the PVR recording management interface sends the recorded video file to the background thread, the recorded video file is played in the background, and the video frame is captured by the snapshot function according to a preset rule, and the video frame that meets the predetermined condition is captured as a video frame. Valid video frame;

Encapsulating the valid video frame into a thumbnail of the bitmap bmp format and storing it in a specified cache directory;

When it is detected that the recorded video file is still in the PVR recording management interface, the recorded video file is displayed with the thumbnail as a cover.

Optionally, after the data of the recorded video file is acquired by the PVR recording management interface and sent to the background thread, the recorded video file is played in the background, and the video frame is captured by the snapshot function according to a preset rule. The steps of taking a video frame that meets a predetermined condition as a valid video frame include:

After the data of the recorded video file is sent to the background thread in the PVR recording management interface, the background thread is started, and the video player is started in the background to play the recorded video file;

Grasing a video frame during playback of the video player, and determining whether the number of color points of the captured video frame is greater than or equal to a predetermined threshold;

When the number of color points of the captured video frame is greater than or equal to a predetermined threshold, the video frame is stopped to be captured, and the current video frame is used as the effective video frame; when the number of color points of the captured video frame is less than a predetermined threshold Then, the video frame is continuously captured, and when the number of times the video frame is captured is greater than the predetermined number of times, the video frame is stopped, and the video frame with the largest number of captured color points is used as the effective video frame, and the color point refers to a pixel point in the video frame that satisfies a preset condition, where the absolute value of the absolute value of the difference between the r component, the g component, and the b component of the pixel is greater than 50 pixel.

Optionally, the step of storing the valid video frame into a bmp format thumbnail and storing the file in a specified cache directory comprises:

Obtaining a file name of the recorded video file corresponding to the valid video frame, and generating a key name after calculating the file name according to the message digest algorithm fifth edition MD5 algorithm;

The valid video frame is encapsulated into a thumbnail of the bmp format and stored in a specified cache directory, and the key name is used as a file name of the thumbnail of the bmp format.

The present disclosure also provides a display system for recording video files of a set top box, including:

The detecting and acquiring module is configured to: when detecting the personal video recording PVR set top box enters the PVR recording management interface, obtain information of the recorded video file, and determine whether there is a thumbnail in the information of the recorded video file;

a first cover display control module configured to display the thumbnail as a cover of the recorded video file when a thumbnail has been detected in the information of the recorded video file;

a second cover display control module, configured to: when there is no thumbnail in the information of the recorded video file, capture the video frame of the recorded video file, and after capturing the valid video frame, The valid video frame is stored in a specified cache directory according to a specific picture format, and the captured valid video frame is displayed as a cover of the recorded video file.

Optionally, the second cover display control module includes:

a preset picture display unit configured to: when there is no thumbnail in the information of the recorded video file, obtain a preset picture as a cover of the recorded video file;

The effective video frame capture unit is configured to play the recorded video file in the background after the PVR recording management interface sends the recorded video file to the background thread, and capture the video frame by using the snapshot function according to a preset rule. Grab a video frame that meets the predetermined condition as a valid video frame;

a storage unit, configured to encapsulate the valid video frame into a bitmap of a bitmap bmp format and store the image in a specified cache directory;

And a thumbnail display unit configured to display the recorded video file with the thumbnail as a cover when the recorded video file is still detected in the PVR recording management interface.

Optionally, the valid video frame capture unit includes:

Recording a video file background playing unit, configured to: after the data of the recorded video file is sent to the background thread in the PVR recording management interface, start a background thread, and start a video player in the background to play the recorded video file;

a color point number determining unit configured to capture a video frame during playback of the video player, And determining whether the number of color points of the captured video frame is greater than or equal to a predetermined threshold;

The first valid video frame determining unit is configured to stop capturing the video frame and use the current video frame as the effective video frame when the number of the color points of the captured video frame is greater than or equal to a predetermined threshold;

The second effective video frame determining unit is configured to continue to capture the video frame when the number of color points of the captured video frame is less than a predetermined threshold, and stop capturing the video frame when the number of times the video frame is captured is greater than a predetermined number of times. The video frame with the largest number of captured color points is used as the effective video frame, wherein the color point refers to a pixel point in the video frame that satisfies a preset condition, and the preset condition is the pixel point. The absolute value of the difference between the two components of the r component, the g component, and the b component has a maximum value greater than 50 pixel points.

a key generating unit, configured to acquire a file name of the recorded video file corresponding to the valid video frame, and generate a key name after calculating the file name according to the message digest algorithm fifth version MD5 algorithm;

The encapsulation and storage unit is configured to encapsulate the valid video frame into a bmp format thumbnail and store it in a specified cache directory, and use the key name as a file name of the bmp format thumbnail.

The present disclosure also provides a computer readable storage medium storing computer executable instructions for performing the above method.

The present disclosure also provides a display device for recording a video file of a set top box, the display device of the set top box recording the video file comprising one or more processors, a memory and one or more programs, the one or more programs being stored in the memory The above method is performed when executed by one or more processors.

The present disclosure also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, Having the computer perform any of the methods described above.

The present disclosure provides a method and system for displaying a recorded video file of a set top box. The thumbnail of the video frame in the recorded file is displayed as a cover of the recorded file, so that the user can conveniently and quickly obtain the difference of different recorded video files, thereby Quickly get the recorded video file you want to play.

DRAWINGS

FIG. 1 is a schematic diagram showing a recorded video file in a file list manner in the related art.

2 is a flow chart of a method for displaying a cover of a recorded file based on a PVR set top box according to an embodiment.

3 is a flow chart of a method for displaying a cover of a recorded file based on a PVR set top box according to an embodiment.

4 is a flow chart of a method for displaying a cover of a recorded file based on a PVR set top box according to an embodiment.

FIG. 5 is a schematic diagram of a method for displaying a cover of a recorded file based on a PVR set top box according to an embodiment.

6 is a functional block diagram of a recording file cover display system based on a PVR set top box according to an embodiment.

FIG. 7 is a schematic structural diagram of a display system for recording a video file of a set top box according to an embodiment.

FIG. 8 is a schematic structural diagram of a display system for recording a video file of another set top box according to an embodiment.

FIG. 9 is a schematic structural diagram of a display system for recording a video file of another set top box according to an embodiment.

FIG. 10 is a schematic diagram showing the hardware structure of a display device for recording a video file of a set top box according to an embodiment.

detailed description

This embodiment provides a flowchart of a cover display method for recording a video file based on a PVR set top box. As shown in FIG. 2, the method includes:

Step 100: When detecting that the PVR set-top box enters the PVR recording management interface, obtain information of the recorded video file, determine whether there is a thumbnail in the information of the recorded video file, and when there is a thumbnail, perform step 200, when there is no thumbnail Then, step 300 is performed.

Enter the PVR recording management interface, also known as the PVR recording resource management scene menu, display the recorded video file in the interface style of the thumbnail form, if the recorded video file already has its own thumbnail, display the thumbnail; if there is no thumbnail, First display with the default thumbnail image. Among them, the thumbnail is generally used for a scene such as a computer desktop or a webpage, and may be a picture processed by the original image in a compressed manner. Because the thumbnails are small and load fast, a quick preview is possible. The essence of PVR recording is to store program video data in a format such as MPEG2 or MPEG4 when playing a program. During playback, a dedicated video player is called for decoding playback.

Step 200: The PVR recording management interface displays the thumbnail as the cover of the recorded video file.

If the recorded video file already has its own thumbnail, then the PVR recording management interface is displayed. Show thumbnails.

Step 300: The PVR recording management interface captures the video frame of the recorded video file, and after capturing the valid video frame, stores the video frame in the specified cache format according to a specific image format, and uses the captured valid video frame as the recorded video. The cover of the file is displayed.

There may be black frames or gray frames in a video, and in order to extract a full-filled video frame as a thumbnail, black frames or gray frames are eliminated, and colorful video frames are captured as much as possible.

A certain frame of video data, that is, a video frame, is composed of a plurality of pixels, which may be black and white, gray or color. If a rich video frame is to be extracted, the color data pixels of the frame of the video data are included. The more the better. When the set-top box decodes and plays the video in the background, the video frame can be captured by the snapshot function. In order to reduce the possibility of capturing the video frame of the black frame or the gray frame, the video frame can be captured by searching for different positions during playback.

Optionally, step 300 includes:

Step 301: When it is detected that the recorded video file has no thumbnail, the preset picture is obtained as a cover of the recorded video file for display.

Step 302: The PVR recording management interface sends the recorded video file to the background thread, plays the recorded video file in the background, captures the video frame through the snapshot function according to a preset rule, and captures the video frame that meets the predetermined condition as the effective video frame.

Step 303: Encapsulate the valid video frame into a bitmap of a bitmap (Bmp) format and store it in a specified cache directory.

Step 304: When it is detected that the PVR recording management interface still has a recorded video file, the recorded video file is displayed with the thumbnail as a cover.

After the background thread is started, the PVR recording management interface takes the current path, the name of all the recording files owned by the current directory folder, and the number of recording files that can be displayed on the current display interface. The current display interface is the first page, and the current user operation mode is The information data such as page up or page down is transmitted to the background thread.

After the background thread starts, the video player is started first (the player runs in the background, the video output is turned off, so the user does not affect the operation in the PVR recording management interface), and then plays in the background according to the name of the recorded file, and crawls A valid video frame for this recording. When decoding in the background, first judge this recording Whether the file already has a corresponding thumbnail, if there is already a thumbnail, the thumbnail is used as a cover; if there is no thumbnail, the recording is played in the background. When playing this recording file in the background, a valid video frame is captured according to the method of capturing a video frame.

When capturing video frames in the background, there may be a priority order, first grab the video frame of the recording file of the current display interface, and then grab the video frame of the recording file of the previous or next page of the current display interface, and finally follow The folder order of the directory captures the video frames of the other folder recording files.

When capturing video frames in the background, the user can have key operations on the PVR recording management interface, such as turning pages to the previous page or the next page. When there is a page turning action, the PVR recording management interface will promptly display the current display interface. On the first few pages, the index number of the first recording file of the current page is thrown to the background thread in time. The background thread interrupts the current operation in time, and timely tracks the current display interface to parse the video frame of the recording file of the current display interface.

After the background thread captures the valid video frame of the recorded file, it must be stored in the specified cache directory according to the bmp format, and promptly notify the PVR recording management interface to refresh. When the PVR recording management interface receives the refresh message, it judges the new capture. Whether the recording file to the video frame is on the current screen, if it exists, then obtain the thumbnail of the recording file and refresh the PVR recording management interface to the specified cache directory.

After the step 300, the method may further include: when the PVR recording management interface exits, the background thread needs to send an exit message, the background thread stops decoding the recorded video file, closes the background video player, and finally destroys the background thread.

Optionally, step 302 includes:

Step 321: The PVR recording management interface sends the recorded video file data to the background thread. After the background thread is started, the video player is started in the background, and the video player plays the recorded video file in the background.

Step 322: Grab a video frame during playback of the video player, and determine whether the number of color points of the captured video frame is greater than or equal to a predetermined threshold.

Step 323: If the number of color points of the captured video frame is greater than or equal to a predetermined threshold, stop capturing the video frame and set the current video frame as a valid video frame.

Step 324: If the number of color points of the captured video frame is less than a predetermined threshold, continue to capture the video frame. If the number of times the video frame is captured is greater than the predetermined number of times, the video frame is stopped, and the captured video frame is colored. The video frame with the most number of points is used as a valid video frame.

Wherein, the color point means that the r component, the g component, and the b component of the pixel in the video frame satisfy the r component, and the absolute value of the difference between the g component and the b component exceeds 50, that is, satisfies max(|rg| , |rb|,|bg|)>50 pixels, where max is a function that takes the maximum value from |rg|, |rb|, and |bg|. In order to quickly capture the video frame, the minimum number of color points N of the color frame can be given. If the number of color points of the captured video frame is greater than N, then the video frame is considered to be effectively captured, otherwise the data is captured 3 times, and the color point is the most. One frame of video is the final desired video frame.

Optionally, step 303 includes:

Step 331: Acquire a file name of the recorded video file corresponding to the valid video frame, and generate a key name after calculating the file name according to the Message-Digest Algorithm 5 (MD5) algorithm.

Step 332: Encapsulate the valid video frame into a bmp format thumbnail and store it in a specified cache directory, and define a file name of the bmp format thumbnail as a key name.

Because it takes a certain time to capture a valid video frame, if you capture a valid video frame, you can put the same recorded video file in order to avoid wasting time and affecting the smoothness and friendly interaction of the interface. The captured valid video frames are stored.

Because the file names of different recording files are different, the length of the file names may be different, which is difficult to manage. According to the MD5 algorithm, the 16-byte key name generated by the record name can be obtained. Each record name corresponds to generate a unique key name, and the length is fixed, which is convenient for management.

The captured video frame is bitmap data that can be directly displayed. We can store the captured video frame in bmp format. The name of the file in bmp format is the key name generated by the MD5 algorithm. Store to the specified area.

This embodiment also proposes a flowchart of a cover display method for recording a video file based on a PVR set top box. As shown in FIG. 3, the method includes:

Step 10. Start.

Step 20: Enter the PVR recording management interface. If the thumbnail has been obtained for the recorded video file, the thumbnail is displayed. If the recorded video file has no thumbnail, the default thumbnail is displayed.

Step 30: Start a background thread, decode the recorded video file according to the rules, and play the captured video. The frame is 3 times, and the video frame in which the color point is the most is taken as the final effective video frame.

Step 40: After the valid video frame is captured, the key name is generated by using the file name according to the MD5 algorithm, and the valid video frame is encapsulated into a thumbnail of the bmp format for storage, and the thumbnail file of the bmp format is named the key name.

Step 50: After the valid video frame is captured, the PVR recording management interface is notified in time, and the PVR recording management interface finds that the recorded video file is refreshed on the current display interface.

This embodiment also proposes a flowchart of a method for displaying a cover of a recorded file based on a PVR set top box. As shown in FIG. 4, the method includes:

Step 21, start.

Step 22: Start the background video decoder to play the recorded video file, and start capturing the video frame.

Step 23: Determine whether the number of color points of the video frame meets the requirement, wherein the requirement is that whether the number of color points is greater than or equal to a predetermined threshold, and if the threshold is greater than or equal to a predetermined threshold, step 26 is performed, and if the threshold is less than the predetermined threshold, step 24 is performed.

Step 24: It is determined whether the video frame has been captured three times. If it is not three times, the next position is searched, and after the next frame is started, step 23 is performed. If it is three times, step 25 is performed.

Step 25: taking a frame with the largest number of color points in the three frame video frames, and storing the frame as a valid video frame;

Step 26: The video frame is a valid video frame and is stored.

This embodiment also provides a schematic diagram of a method for displaying a cover of a recorded file based on a PVR set top box, as shown in FIG. 5, which is mainly displayed in the form of a thumbnail. As shown in Figure 5, only the file name generated by the MD5 algorithm is displayed, and the user can obtain the content of the recorded video file through the video thumbnail. Old people or illiterate children at home can also quickly access the programs they are going to watch.

In this embodiment, a functional block diagram of a cover screen display system based on a PVR set top box is also provided. As shown in FIG. 6, the system includes:

The detecting and acquiring module 100 is configured to: when detecting that the PVR set-top box enters the PVR recording management interface, obtain information of the recorded video file, and determine whether there is a thumbnail in the information of the recorded video file; refer to the relevant in the method embodiment. content.

The first cover display control module 200 is configured to display the thumbnail as a cover of the recorded video file when the thumbnail of the recorded video file is detected; Related content in the law embodiment.

The second cover display control module 300 is configured to: when there is no thumbnail in the information of the recorded video file, capture the video frame of the recorded video file, and after capturing the valid video frame, The valid video frame is stored in the specified cache directory according to a specific picture format, and the captured valid video frame is displayed as a cover of the recorded video file; reference may be made to related content in the method embodiment.

Optionally, referring to FIG. 7, the second cover display control module 300 includes:

The preset picture display unit 301 is configured to: when there is no thumbnail in the information of the recorded video file, obtain a preset picture as a cover of the recorded video file; refer to related content in the method embodiment. .

The effective video frame capture unit 302 is configured to play the recorded video file in the background after the PVR recording management interface sends the recorded video file to the background thread, and capture the video frame by using the snapshot function according to a preset rule. The video frame that meets the predetermined condition is captured as a valid video frame; reference may be made to related content in the method embodiment.

The storage unit 303 is configured to store the valid video frame into a bmp format thumbnail and store it in a specified cache directory; refer to related content in the method embodiment.

The thumbnail display unit 304 is configured to display the recorded video file with the thumbnail as a cover when detecting that the recorded video file is still in the PVR recording management interface; Related content.

Optionally, referring to FIG. 8, the valid video frame capture unit 302 includes:

The recording video file background playing unit 3021 is configured to: after the data of the recorded video file is sent to the background thread in the PVR recording management interface, start a background thread, and start a video player in the background to play the recorded video file. Reference can be made to the relevant content in the method embodiment.

The color point number determining unit 3022 is configured to capture a video frame during playback of the video player, and determine whether the number of color points of the captured video frame is greater than or equal to a predetermined threshold; refer to the correlation in the method embodiment. content.

The first effective video frame determining unit 3023 is configured to stop capturing the video frame and use the current video frame as the valid video frame when the number of the color points of the captured video frame is greater than or equal to a predetermined threshold. Refer to the relevant content in the method embodiment.

The second effective video frame determining unit 3024 is configured to continue to capture the video frame when the number of color points of the captured video frame is less than a predetermined threshold, and stop capturing the video frame when the number of times the video frame is captured is greater than a predetermined number of times The video frame with the largest number of captured color points is used as the valid video frame; reference may be made to related content in the method embodiment.

Optionally, referring to FIG. 9, the storage unit 303 includes:

The key generating unit 3031 is configured to acquire a file name of the recorded video file corresponding to the valid video frame, and generate a key name after calculating the file name according to the MD5 algorithm; reference may be made to related content in the method embodiment.

The encapsulation and storage unit 3032 is configured to encapsulate the valid video frame into a thumbnail of the bmp format, store it in a specified cache directory, and use the key name as a file name of the thumbnail of the bmp format; Related content in the example.

The color point refers to a pixel point where the r component, the g component, and the b component of the pixel in the video frame satisfy max(|rg|, |rb|, |bg|)>50; refer to the method embodiment. Related content.

In summary, the present embodiment provides a recording file cover display system based on a PVR set-top box, which uses a thumbnail of a video frame in a recorded video file as a cover display of the recorded video file, so that the user can obtain differently conveniently and quickly. The difference in recording video files allows you to quickly get the recorded video files you want to play.

An embodiment further provides a computer readable storage medium storing computer executable instructions for performing the above method.

FIG. 10 is a schematic diagram showing the hardware structure of a display device for recording a video file of a set top box according to an embodiment. As shown in FIG. 10, the display device for recording a video file of the set top box includes: one or more processors 1010 and a memory 1020. One processor 1010 is taken as an example in FIG.

The display device for recording a video file of the set top box may further include: an input device 1030 and an output device 1040.

The processor 1010, the memory 1020, the input device 1030, and the output device 1040 in the display device of the set top box recording the video file may be connected by a bus or other means, and the bus connection is taken as an example in FIG.

The input device 1030 can receive input numeric or character information, and the output device 1040 can include a display device such as a display screen.

The memory 1020 is a computer readable storage medium that can be used to store software programs, computer executable programs, and modules. The processor 1010 performs various functional applications and data processing by executing software programs, instructions, and modules stored in the memory 1020 to implement any of the above-described embodiments.

The memory 1020 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function; and the storage data area may store the use of the display device according to the recorded video file of the set top box. Data, etc. In addition, the memory may include volatile memory such as random access memory (RAM), and may also include non-volatile memory such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device.

Memory 1020 can be a non-transitory computer storage medium or a transitory computer storage medium. The non-transitory computer storage medium, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 1020 can optionally include memory remotely located relative to processor 1010 that can be connected to the display device of the set top box for recording video files over a network. Examples of the above networks may include the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

The input device 1030 can be configured to receive input numeric or character information, and to generate key signal inputs related to user settings and function control of a display device of the set video cassette of the set top box. The output device 1040 can include a display device such as a display screen.

The display device for recording a video file of the set top box of the present embodiment may further include a communication device 1050 for transmitting and/or receiving information through the communication network.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by executing related hardware by a computer program, and the program can be stored in a non-transitory computer readable storage medium. The program, when executed, may include the flow of an embodiment of the method as described above, wherein the non-transitory computer readable storage medium may be a magnetic disk, an optical disk, a read only memory (ROM), or a random access memory (RAM). Wait.

Industrial applicability

Claims

A method for displaying a recorded video file of a set top box, comprising:

When detecting that the personal video recording PVR set top box enters the PVR recording management interface, obtain information of the recorded video file, and determine whether there is a thumbnail in the information of the recorded video file;

When there is already a thumbnail in the information of the recorded video file, the thumbnail is displayed as the cover of the recorded video file;

When there is no thumbnail in the information of the recorded video file, the video frame of the recorded video file is captured, and after the valid video frame is captured, the valid video frame is classified according to a specific image format. The storage is stored in the specified cache directory, and the captured valid video frame is displayed as the cover of the recorded video file.
The display method according to claim 1, wherein when there is no thumbnail in the information of the recorded video file, the video frame of the recorded video file is captured, and the effective video is captured. After the frame, the valid video frame is stored in the specified cache directory according to a specific picture format, and the captured valid video frame is displayed as the cover of the recorded video file, including:

When it is detected that there is no thumbnail in the information of the recorded video file, acquiring a preset picture as a cover of the recorded video file for display;

After the PVR recording management interface sends the recorded video file to the background thread, the recorded video file is played in the background, and the video frame is captured by the snapshot function according to a preset rule, and the video frame that meets the predetermined condition is captured as a video frame. Valid video frame;

Encapsulating the valid video frame into a thumbnail of the bitmap bmp format and storing it in a specified cache directory;

When it is detected that the recorded video file is still in the PVR recording management interface, the recorded video file is displayed with the thumbnail as a cover.
The display method according to claim 2, wherein after the data of the recorded video file is acquired by the PVR recording management interface and sent to a background thread, the recorded video file is played in the background, and is passed according to a preset rule. The snapshot function captures a video frame, and the steps of capturing a video frame that meets a predetermined condition as a valid video frame include:

After the data of the recorded video file is sent to the background thread in the PVR recording management interface, the background thread is started, and the video player is started in the background to play the recorded video file;

Grasing a video frame during playback of the video player, and determining whether the number of color points of the captured video frame is greater than or equal to a predetermined threshold;

When the number of color points of the captured video frame is greater than or equal to a predetermined threshold, the video frame is stopped to be captured. The current video frame is used as the valid video frame; when the number of color points of the captured video frame is less than a predetermined threshold, the video frame is continuously captured, and when the number of captured video frames is greater than a predetermined number of times, the video frame is stopped. The video frame with the largest number of captured color points is used as the effective video frame, and the color point refers to a pixel point in the video frame that satisfies a preset condition, and the preset condition is the pixel point. The absolute value of the difference between the two components of the r component, the g component, and the b component has a maximum value greater than 50 pixel points.
The display method according to claim 3, wherein the step of storing the valid video frame into a bmp format thumbnail and storing it in a specified cache directory comprises:

Obtaining a file name of the recorded video file corresponding to the valid video frame, and generating a key name after calculating the file name according to the message digest algorithm fifth edition MD5 algorithm;

The valid video frame is encapsulated into a thumbnail of the bmp format and stored in a specified cache directory, and the key name is used as a file name of the thumbnail of the bmp format.
A display system for recording video files of a set top box, comprising:

The detecting and acquiring module is configured to: when detecting the personal video recording PVR set top box enters the PVR recording management interface, obtain information of the recorded video file, and determine whether there is a thumbnail in the information of the recorded video file;

a first cover display control module configured to display the thumbnail as a cover of the recorded video file when a thumbnail has been detected in the information of the recorded video file;

a second cover display control module, configured to: when there is no thumbnail in the information of the recorded video file, capture the video frame of the recorded video file, and after capturing the valid video frame, The valid video frame is stored in a specified cache directory according to a specific picture format, and the captured valid video frame is displayed as a cover of the recorded video file.
The display system of claim 5, wherein the second cover display control module comprises:

a preset picture display unit configured to: when there is no thumbnail in the information of the recorded video file, obtain a preset picture as a cover of the recorded video file;

The effective video frame capture unit is configured to play the recorded video file in the background after the PVR recording management interface sends the recorded video file to the background thread, and capture the video frame by using the snapshot function according to a preset rule. Grab a video frame that meets the predetermined condition as a valid video frame;

a storage unit, configured to encapsulate the valid video frame into a bitmap of a bitmap bmp format and store the image in a specified cache directory;

a thumbnail display unit configured to still have the recording in the PVR recording management interface detected When the video file is used, the recorded video file is displayed with the thumbnail as a cover.
The display system according to claim 6, wherein the effective video frame capture unit comprises:

Recording a video file background playing unit, configured to: after the data of the recorded video file is sent to the background thread in the PVR recording management interface, start a background thread, and start a video player in the background to play the recorded video file;

The color point number determining unit is configured to capture a video frame during playback of the video player, and determine whether the number of color points of the captured video frame is greater than or equal to a predetermined threshold;

The first valid video frame determining unit is configured to stop capturing the video frame and use the current video frame as the effective video frame when the number of the color points of the captured video frame is greater than or equal to a predetermined threshold;

The second effective video frame determining unit is configured to continue to capture the video frame when the number of color points of the captured video frame is less than a predetermined threshold, and stop capturing the video frame when the number of times the video frame is captured is greater than a predetermined number of times. The video frame with the largest number of captured color points is used as the effective video frame, wherein the color point refers to a pixel point in the video frame that satisfies a preset condition, and the preset condition is the pixel point. The absolute value of the difference between the two components of the r component, the g component, and the b component has a maximum value greater than 50 pixel points.
The display system according to claim 7, wherein the step of storing the valid video frame into a bmp format thumbnail and storing it in a specified cache directory comprises:

a key generating unit, configured to acquire a file name of the recorded video file corresponding to the valid video frame, and generate a key name after calculating the file name according to the message digest algorithm fifth version MD5 algorithm;

The encapsulation and storage unit is configured to encapsulate the valid video frame into a bmp format thumbnail and store it in a specified cache directory, and use the key name as a file name of the bmp format thumbnail.
A computer readable storage medium storing computer executable instructions for performing the method of any of claims 1-4.