CN114827754B - Video first frame time detection method and device - Google Patents

Video first frame time detection method and device Download PDF

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Publication number
CN114827754B
CN114827754B CN202210170964.5A CN202210170964A CN114827754B CN 114827754 B CN114827754 B CN 114827754B CN 202210170964 A CN202210170964 A CN 202210170964A CN 114827754 B CN114827754 B CN 114827754B
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image
frame
video
determining
time
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CN114827754A (en
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王荣政
周冰心
周妍
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Alibaba China Co Ltd
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Alibaba China Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845Structuring of content, e.g. decomposing content into time segments
    • H04N21/8455Structuring of content, e.g. decomposing content into time segments involving pointers to the content, e.g. pointers to the I-frames of the video stream

Abstract

The invention discloses a method and a device for detecting video first frame time. Wherein the method comprises the following steps: acquiring multi-frame images in a target video, wherein the target video comprises a video to be displayed; determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears in the display page in a multi-frame image, and determining the first time when the first image appears; determining a first pixel value in the second image and a first duty cycle of the first pixel value to the pixel value included in the second image; determining a third image and a second time when the third image appears in the multi-frame images according to the first duty ratio; and determining the duration of displaying the first frame image of the video to be displayed in the target video according to the difference value between the first time and the second time. The invention solves the technical problems of complicated detection steps and various limitations in detection when the duration of displaying the first frame image is detected in the related technology.

Description

Video first frame time detection method and device
Technical Field
The invention relates to the field of image processing, in particular to a method and a device for detecting video first frame time.
Background
The first frame time is an important core index of live broadcast and video application, and is also one of core factors influencing the viewing experience of users. Too long first frame time often greatly influences user experience, so that the first frame time can be evaluated before each type of short video and live app is online.
The video live broadcast type products in the current market need to evaluate live broadcast and video under the first frame line when releasing the version each time, and evaluated scenes comprise first frame play scenes such as click play, code scanning play, sliding play and the like. The evaluation mode adopts a manual visual observation mode, and each evaluation needs to be subjected to the processes of video recording, video decomposition, manual frame counting, data calculation and the like. The whole off-line evaluation process is time consuming and prone to human error. Another solution is adopted in the related art, but the solution mostly needs to implant codes invasively, and the use cost is high. Other schemes for identifying the first frame of the video often have specific requirements on video attributes (high definition, still and color) or video play paths (fixed video list path click play), and cannot be universal and accurate.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting the time of a first frame of a video, which at least solve the technical problems that the detection steps are complicated and various limitations exist in detection when the time for displaying the first frame of the video is detected in the related technology.
According to an aspect of an embodiment of the present invention, there is provided a method for detecting a video first frame time, including: acquiring multi-frame images in a target video, wherein the target video comprises a video to be displayed; determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears in the display page from the multi-frame images, and determining the first time when the first image appears; determining a first pixel value in the second image and a first duty cycle of the first pixel value to the pixel value included in the second image; determining a third image and a second time when the third image appears in the multi-frame images according to the first duty ratio; and determining the duration of displaying the first frame image of the video to be displayed in the target video according to the difference value between the first time and the second time.
Optionally, determining a third image from the multiple frames of images according to the first duty ratio includes: and traversing the image before the second image frame by frame under the condition that the first duty ratio is larger than a first preset threshold value, determining a second pixel value of a partial image below the image page switching dividing line, and determining that the image with the second duty ratio being smaller than the preset threshold value is a third image until the second duty ratio is smaller than the first preset threshold value.
Optionally, determining a third image from the multiple frames of images according to the first duty ratio includes: and traversing the image after the second image frame by frame in a condition that the first duty ratio is smaller than a first preset threshold value, determining a third pixel value of the image, and selecting the image with the third duty ratio being larger than the first preset threshold value as a third image until the third duty ratio is larger than the first preset threshold value.
Optionally, determining, from the multiple frames of images, a first image when a page switching dividing line appears on the display page includes: determining a pending image when a page switching dividing line appears on a display page and a previous frame image of the pending image from the multi-frame images; determining the image similarity of the undetermined image and the previous frame image; and determining the undetermined image as the first image under the condition that the image similarity is larger than a second preset threshold value.
Optionally, determining, from the multiple frame images, a first image when a page switching parting line appears on a display page and a second image when the page switching parting line disappears on the display page, including: under the condition that an interference line segment appears in the target video, neglecting the interference line segment existing in the multi-frame images according to the image continuity among the multi-frame images; and determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears from the display page in the multi-frame images.
Optionally, after acquiring the multi-frame image in the target video, the method further includes: and performing image binarization processing on the multi-frame images.
According to an aspect of an embodiment of the present invention, there is provided a method for detecting a video first frame time, including: displaying a target video on a display interface, wherein the target video comprises a video to be displayed; receiving a first frame image duration detection instruction at the display interface; and responding to the first frame image duration detection instruction, playing the target video on the display interface, and displaying the duration of the first frame image of the video to be displayed in the target video, wherein the duration of the first frame image is determined according to the difference value between the first time and the second time, the first time is the time when the first image appears, the second time is the time when the third image appears, the first image is an image when a page switching dividing line appears in a multi-frame image of the target video, the third image is an image determined according to a first pixel value included in the second image and the first duty ratio of the first pixel value to the pixel value included in the second image, and the second image is an image when the page switching dividing line appears in the multi-frame image of the target video.
According to an aspect of an embodiment of the present invention, there is provided a video first frame time detection apparatus, including: the acquisition module is used for acquiring multi-frame images in a target video, wherein the target video comprises a video to be displayed; the first determining module is used for determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears on the display page in the multi-frame images, and determining the first time when the first image appears; a second determining module, configured to determine a first pixel value in the second image, and a first duty ratio of the first pixel value to a pixel value included in the second image; a third determining module, configured to determine a third image and a second time when the third image appears in the multi-frame image according to the first duty ratio; and the fourth determining module is used for determining the duration of displaying the first frame image of the video to be displayed in the target video according to the difference value between the first time and the second time.
According to an aspect of an embodiment of the present invention, there is provided a video first frame time detection apparatus, including: the display module is used for displaying a target video on a display interface, wherein the target video comprises a video to be displayed; the receiving module is used for receiving a first frame image duration detection instruction on the display interface; the detection module is used for responding to the first frame image duration detection instruction, playing the target video on the display interface, displaying the duration of the first frame image of the video to be displayed in the target video, wherein the duration of the first frame image is determined according to the difference value between the first time and the second time, the first time is the time when the first image appears, the second time is the time when the third image appears, in the multi-frame images of the target video, the first image is the image when the page switching dividing line appears on the display page, the third image is the image determined according to the first pixel value included in the second image and the first duty ratio of the first pixel value to the pixel value included in the second image, the second image is the image when the page switching dividing line appears on the display page in the multi-frame images of the target video.
According to an aspect of an embodiment of the present invention, there is provided a computer readable storage medium, where the computer readable storage medium includes a stored program, and when the program runs, controls a device in which the computer readable storage medium is located to execute any one of the above-mentioned methods for detecting a video head frame time.
According to an aspect of an embodiment of the present invention, there is provided a computer apparatus including: a memory and a processor, the memory storing a computer program; the processor is configured to execute a computer program stored in the memory, where the computer program when executed causes the processor to execute the method for detecting a video first frame time according to any one of the above.
In the embodiment of the invention, a multi-frame image in a target video including a video to be displayed is acquired, a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears on the display page are determined in the multi-frame image, and the first time when the first image appears is determined. Determining a first pixel value in the second image and a first duty ratio of the first pixel value to the pixel value included in the second image, so as to determine a third image and a second time when the third image appears in the multi-frame image according to the first duty ratio, and further determine a duration of displaying a first frame image of the video to be displayed in the target video according to a difference value between the first time and the second time. The first image and the third image are obtained from the multi-frame images of the target video only by obtaining the target video, and the time for displaying the first frame image of the video to be displayed in the target video can be determined according to the time of the images. The method and the device have the advantages that the duration detection of the first frame image is more convenient and rapid, and the limitation of excessive conditions is not needed. In addition, the image is determined through the page switching dividing line, so that the determined time is more accurate, and the technical problems that the detection steps are complicated and various limitations exist in detection when the duration of displaying the first frame image is detected in the related technology are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 shows a block diagram of the hardware architecture of a computer terminal for implementing a method for video first frame time detection;
fig. 2 is a flowchart of a first video first frame time detection method according to embodiment 1 of the present application;
fig. 3 is a flowchart of a second method for detecting a first frame time of a video according to embodiment 1 of the present application;
FIG. 4 is a flow chart of a method for video first frame time detection provided in accordance with an alternative embodiment of the present application;
fig. 5 is a block diagram of a first video first frame time detecting device according to embodiment 2 of the present application;
fig. 6 is a block diagram of a second video first frame time detecting device according to embodiment 3 of the present application;
fig. 7 is a block diagram of an apparatus of a terminal according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
First, partial terms or terminology appearing in the course of describing embodiments of the application are applicable to the following explanation:
and the first frame time refers to the time when the user enters the live broadcast/video playing page and the first frame picture of the video is rendered.
Example 1
There is also provided, in accordance with an embodiment of the present application, a method embodiment for video first frame time detection, it being noted that the steps shown in the flowchart of the figures may be performed in a computer system, such as a set of computer executable instructions, and, although a logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than what is shown or described herein.
The method embodiment provided in embodiment 1 of the present application may be executed in a mobile terminal, a computer terminal or a similar computing device. Fig. 1 shows a block diagram of a hardware structure of a computer terminal (or mobile device) for implementing a video first frame time detection method. As shown in fig. 1, the computer terminal 10 (or mobile device) may include one or more processors (shown in the figures as 102a, 102b, … …,102n, which may include, but are not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA), a memory 104 for storing data, and a transmission device for communication functions. In addition, the method may further include: a display, an input/output interface (I/O interface), a Universal Serial BUS (USB) port (which may be included as one of the ports of the BUS), a network interface, a power supply, and/or a camera. It will be appreciated by those of ordinary skill in the art that the configuration shown in fig. 1 is merely illustrative and is not intended to limit the configuration of the electronic device described above. For example, the computer terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
It should be noted that the one or more processors 102 and/or other data processing circuits described above may be referred to generally herein as "data processing circuits. The data processing circuit may be embodied in whole or in part in software, hardware, firmware, or any other combination. Furthermore, the data processing circuitry may be a single stand-alone processing module, or incorporated, in whole or in part, into any of the other elements in the computer terminal 10 (or mobile device). As referred to in embodiments of the application, the data processing circuit acts as a processor control (e.g., selection of the path of the variable resistor termination connected to the interface).
The memory 104 may be used to store software programs and modules of application software, such as a program instruction/data storage device corresponding to the method for detecting video first frame time in the embodiment of the present invention, and the processor executes various functional applications and video first frame time detection by running the software programs and modules stored in the memory 104, that is, implements the method for detecting video first frame time of the application program. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor, which may be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission means is used for receiving or transmitting data via a network. The specific examples of the network described above may include a wireless network provided by a communication provider of the computer terminal 10. In one example, the transmission means comprises a network adapter (Network Interface Controller, NIC) connectable to other network devices via the base station to communicate with the internet. In one example, the transmission device may be a Radio Frequency (RF) module, which is used to communicate with the internet wirelessly.
The display may be, for example, a touch screen type Liquid Crystal Display (LCD) that may enable a user to interact with a user interface of the computer terminal 10 (or mobile device).
In the above-mentioned operation environment, the present application provides a method for detecting the first frame time of video as shown in fig. 2. Fig. 2 is a flowchart of a first method for detecting a video first frame time according to embodiment 1 of the present application, as shown in fig. 2, the method includes the following steps:
step S202, acquiring multi-frame images in a target video, wherein the target video comprises a video to be displayed;
step S204, determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears in the display page in the multi-frame images, and determining the first time when the first image appears;
step S206, determining a first pixel value in the second image and a first duty ratio of the first pixel value to the pixel value included in the second image;
step S208, determining a third image and a second time when the third image appears in the multi-frame images according to the first duty ratio;
step S210, determining the duration of displaying the first frame image of the video to be displayed in the target video according to the difference value between the first time and the second time.
Through the steps, a multi-frame image in a target video including a video to be displayed is obtained, a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears on the display page are determined in the multi-frame image, and the first time when the first image appears is determined. Determining a first pixel value in the second image and a first duty ratio of the first pixel value to the pixel value included in the second image, so as to determine a third image and a second time when the third image appears in the multi-frame image according to the first duty ratio, and further determine a duration of displaying a first frame image of the video to be displayed in the target video according to a difference value between the first time and the second time. The first image and the third image are obtained from the multi-frame images of the target video only by obtaining the target video, and the time for displaying the first frame image of the video to be displayed in the target video can be determined according to the time of the images. The method and the device have the advantages that the duration detection of the first frame image is more convenient and rapid, and the limitation of excessive conditions is not needed. In addition, the image is determined through the page switching dividing line, so that the determined time is more accurate, and the technical problems that the detection steps are complicated and various limitations exist in detection when the duration of displaying the first frame image is detected in the related technology are solved.
As an alternative embodiment, a multi-frame image in a target video including a video to be displayed is acquired. Firstly, acquiring a target video comprising a video to be displayed, and carrying out framing treatment on the target video to obtain multi-frame images in the target video. It should be noted that, the video to be displayed refers to a video which is not displayed at the beginning in the target video, and the video to be displayed is displayed along with the playing of the target video. In a short video scene, the video to be displayed refers to the video watched by the next video to be watched by the user after the video watched currently. The target video may be a recording screen, and in a scene of a short video, may be a video including a process of recording a video currently being viewed to a video to be viewed next. By acquiring the multi-frame images in the target video including the video to be displayed, the effect of simply and conveniently determining the time length of displaying the first frame image of the video to be displayed in the target video through the target video can be achieved through analysis of the multi-frame images. And moreover, the target video can be analyzed only by acquiring the target video, so that the method is free from the limitation of various conditions, is suitable for various scenes, and increases the practicability and applicability of the alternative embodiment.
It should be noted that, the multi-frame image directly obtained from the target image has excessive colors, which may cause great trouble to the subsequent processing, so that the multi-frame image may be subjected to image binarization processing, that is, the processed multi-frame image has two pixel values of black and white and 0,255, so as to reduce the amount of calculation and accelerate the determination of the duration of displaying the first frame image of the video to be displayed in the target video.
As an alternative embodiment, a first image when the page switching dividing line appears on the display page and a second image when the page switching dividing line disappears are determined from the multi-frame images. In the first image and the second image, in a short video scene, the currently watched video is slid up to the next video to be watched by the user, and in this process, a page switching dividing line appears, which separates the two videos. The first image when the page switch split line appears on the display page can be understood as the image that is just displayed or is about to appear when the video to be viewed is just displayed. The second image of the page switching dividing line when the display page disappears can be understood as an image when the video to be watched by the user is completely displayed and the last video disappears. Because the page switching dividing line is obvious, the first image and the second image are determined through the page switching dividing line, and the obtained image and the determined image time are more accurate. Since the state of the video to be displayed may be displayed or not when the second image of the page switching dividing line when the page disappears is determined, at this time, the third image and the time when the third image appears are determined according to the second image. Since the first image when the page switching dividing line appears on the display page, namely the video to be displayed starts to be loaded, the first time when the first image appears is acquired. And combining the second time when the third image appears, so that the time length for displaying the first frame image of the video to be displayed in the target video can be determined. The first image and the second image are determined through the page switching dividing line, so that the confirmation of the images is more accurate, the process of searching the third image is more convenient in the subsequent processing process, and the speed of determining the time length of displaying the first frame image of the video to be displayed in the target video is increased.
When the first image when the page switching dividing line appears on the display page is determined in the multi-frame image, the image when the page switching dividing line appears on the display page may be verified, and when the verification is passed, the first image may be determined, for example, by the following manner: determining an image to be determined when a page switching dividing line appears on a display page and an image of a previous frame of the image to be determined in a multi-frame image, and determining the image similarity of the image to be determined and the image of the previous frame, wherein the method for determining the image similarity is quite large, for example, the similarity is calculated through a plurality of algorithms such as cosine and hamming similarity between adjacent images, a modified cosine similarity algorithm and the like, and the image to be determined is a first image under the condition that the image similarity is larger than a second preset threshold value, so that the accuracy of the acquired first image is ensured.
It should be further noted that, when determining, in the multi-frame images, that the first image and the second image when the page switching dividing line appear on the display page when the page switching dividing line disappears, an interference line segment may appear, for example, a pop-up window may appear in the process of recording the video, or a situation that a frame such as a line segment appears in the video to be slipped off last, and when the interference line segment appears in the target video, the interference line segment existing in the multi-frame images is ignored according to the image continuity between the multi-frame images, that is, the page switching dividing line must be continuous between the multi-frame images, so that the interference line segment existing in the multi-frame images can be ignored according to the image continuity between the multi-frame images, and further the first image and the second image when the page switching dividing line disappears when the page switching dividing line appears on the display page can be accurately determined in the multi-frame images.
As an alternative embodiment, when determining the third image and the time when the third image appears according to the second image, the second time when the third image and the third image appear may be determined in the multi-frame image according to the first duty ratio by determining the first pixel value in the second image and the first duty ratio of the first pixel value to the pixel value included in the second image. For example, a pixel value of 0 (black) is determined, and the pixel value of 0 occupies a first duty ratio of the pixel values included in the second image. Because video typically displays a black mask when the video picture is not rendered (video to be displayed is not shown), the first duty cycle of pixel value 0 is near 100%. The video typically displays a color picture when the video picture is rendered, and thus the first duty cycle of pixel value 0 may be 20%,15%, etc. other values. In summary, it may be determined whether the video to be displayed is displayed by the first duty cycle. Different treatments are performed according to the first duty ratio, and the following details of the treatment mode are described below:
1) And under the condition that the first duty ratio is larger than a first preset threshold value, the video at the moment of the image is rendered, the video to be displayed is displayed, at the moment, the image before the second image is traversed forward frame by frame, the second pixel value of the partial image below the image page switching dividing line is determined, the second pixel value occupies the second duty ratio of the pixel value included in the image until the second duty ratio is smaller than the first preset threshold value, and the image with the second duty ratio smaller than the preset threshold value for the first time is determined to be a third image. Because the image above the page switch dividing line is still a frame of the original video, the original video is rendered, i.e. displayed, so as to avoid the influence of the original video, a second pixel value of the partial image below the page switch dividing line of the image is determined, and the second pixel value occupies a second duty ratio of the pixel value included in the image.
2) And under the condition that the first duty ratio is smaller than a first preset threshold value, the video at the moment of the image is not rendered, and the video to be displayed is not displayed, so that the image after the second image is traversed backwards frame by frame, a third pixel value of the image is determined, the third pixel value occupies a third duty ratio of the pixel value included in the image until the third duty ratio is larger than the first preset threshold value, and the image with the third duty ratio being larger than the first preset threshold value for the first time is selected as the third image.
It should be noted that, the first predetermined threshold may be set according to the pixel value, and the actual application needs and the scene. Through the processing of the two cases, the third image can be determined more timely according to the actual situation. The third image can be determined more accurately and easily by determining the third image by the pixel value and the duty ratio of the pixel value.
As an optional embodiment, after determining the third image and the second time when the third image appears in the multi-frame image, the duration of displaying the first frame image of the video to be displayed in the target video may be determined according to the difference between the first time and the second time, so as to achieve the effect of automatically determining the duration of displaying the first frame image of the video to be displayed in the target video.
Fig. 3 is a flowchart of a second method for detecting a first frame time of a video according to embodiment 1 of the present invention, as shown in fig. 3, the method includes the following steps:
step S302, displaying a target video on a display interface, wherein the target video comprises a video to be displayed;
step S304, receiving a first frame image duration detection instruction at a display interface;
in step S306, in response to the first frame image duration detection instruction, playing a target video on a display interface, and displaying a duration of a first frame image of the video to be displayed in the target video, where the duration of the first frame image is determined according to a difference between a first time and a second time, the first time is a time when a first image appears, the second time is a time when a third image appears, the first image is an image of a multi-frame image of the target video when a page switching dividing line appears on a display page, the third image is an image determined according to a first pixel value included in the second image and a first duty ratio of the first pixel value to the pixel value included in the second image, and the second image is an image of the multi-frame image of the target video when the page switching dividing line displays the page.
Through the steps, the target video comprising the video to be displayed is displayed on the display interface, the target video is played on the display interface and the time length of the first frame image of the video to be displayed is displayed in the target video in response to the time length detection instruction of the first frame image, in the process of confirming the time length of the first frame image, the first image when the page switching dividing line appears on the display page and the second image when the page switching dividing line disappears on the display page are firstly determined in the multi-frame images, and the first time when the first image appears is determined. Determining a first pixel value in the second image and a first duty ratio of the first pixel value to the pixel value included in the second image, so as to determine a third image and a second time when the third image appears in the multi-frame image according to the first duty ratio, and further determine a duration of displaying a first frame image of the video to be displayed in the target video according to a difference value between the first time and the second time. The first image and the third image are obtained from the multi-frame images of the target video only by obtaining the target video, and the time for displaying the first frame image of the video to be displayed in the target video can be determined according to the time of the images. The method and the device have the advantages that the duration detection of the first frame image is more convenient and rapid, and the limitation of excessive conditions is not needed. In addition, the image is determined through the page switching dividing line, so that the determined time is more accurate, and the technical problems that the detection steps are complicated and various limitations exist in detection when the duration of displaying the first frame image is detected in the related technology are solved.
Based on the foregoing embodiments and optional embodiments, an optional implementation is provided, and is specifically described below.
In an alternative embodiment of the present invention, a method for detecting a video first frame time is provided, fig. 4 is a flowchart of the method for detecting a video first frame time according to the alternative embodiment of the present invention, as shown in fig. 4, and the alternative embodiment of the present invention is described in detail below.
S1, inputting a video;
the input video refers to video or video formed by recording in the live broadcast process. The playing scene can be a click playing scene, a sliding playing scene, a code scanning playing scene and the like. Taking a sliding play scenario as an example.
S2, video framing;
and automatically carrying out framing treatment on the input video to obtain a video frame list, and recording a corresponding frame sequence number and a frame time stamp.
After the video is framed, binarization processing may be performed on each frame of image.
S3, calculating video playing starting time T1;
the video playing start time is the time when the page switching dividing line just appears, namely the first frame of image when the page switching dividing line appears can be understood, and the corresponding time stamp is T1.
It should be noted that, when detecting whether the page switching dividing line appears, a region growing algorithm may be used to identify the change of the pixels in the same horizontal or vertical direction, and when the change of the pixels in the same direction exceeds the threshold value, the page switching dividing line is considered.
In order to further ensure that the confirmed frame images are correct, an image similarity algorithm can be adopted to further calculate the similarity of cosine and hamming between adjacent images, and when the similarity distance exceeds a given threshold value, the page switching dividing line is considered to appear, and the recording at the moment T1 is correct.
S4, calculating video stream picture rendering time T2;
s4.1, in the input video, the page switching dividing line can change along with the sliding position, namely the page switching dividing line always slides from one side of the screen to the other side, at the moment, the position P of the page switching dividing line is recorded, the value of the position P of the page switching dividing line always monotonically increases or decreases, and the set of the recorded P is Q.
It should be noted that, in the input video, there may be an abnormal line segment, and in this process, the abnormal line segment may be removed, so as not to affect the position record of the page switching dividing line.
In a scene from bottom to top, the page switching dividing line slides to the top, and the completion of the page switching takes the position of the page switching dividing line reaching the top of the screen as a mark. When the pixel division line position P value reaches the screen length or width, the page switch is completed at the recording time T.
S4.2, when the video picture is not rendered, the video usually displays a black mask, and the pixel value after binarization is basically 0. In order to identify the appearance of a video picture, firstly taking a page switching completion T moment image for pixel analysis, taking 0 pixel value analysis as an example, determining the duty ratio of 0 pixels in all pixel values of the T moment image, and considering that the picture is rendered when the duty ratio is larger than a threshold value, otherwise, the picture is not rendered.
And when the duty ratio is lower than a threshold value, recording the time as T2.
And (3) the video picture at the moment T is not rendered, the image after the moment T is traversed in a positive sequence, the pixel values of the image are analyzed, the duty ratio of the pixel values to all the pixel values of the image is calculated, and when the duty ratio exceeds a threshold value, the moment T2 is recorded.
S5, automatically calculating the first frame duration T2-T1.
Through the above-mentioned optional embodiments, the following beneficial effects can be achieved:
(1) The method has wide adaptability, supports the calculation of the first frame time of the video of multiple scenes, supports multiple scenes such as click play, slide play, code scanning play and the like, does not limit video attributes (motion, static, fuzzy, high definition) and the like, and is compatible with the first frame detection of different scenes;
(2) The first frame time is automatically identified by combining various intelligent strategies, so that the accuracy is high;
(3) The method is non-invasive, easy to use, high in precision, low in cost, fast in calculation and wide in applicability, and the first frame time can be analyzed only by the recorded video without any auxiliary hardware.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present invention. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a computer readable storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method of the embodiments of the present invention.
Example 2
According to an embodiment of the present invention, there is further provided a first apparatus for implementing the method for detecting a first frame time of a video, and fig. 5 is a block diagram of a first apparatus for detecting a first frame time of a video according to embodiment 2 of the present invention, as shown in fig. 5, where the apparatus includes: the device is described below as an acquisition module 502, a first determination module 504, a second determination module 506, a third determination module 508, and a fourth determination module 510.
The obtaining module 502 is configured to obtain a multi-frame image in a target video, where the target video includes a video to be displayed; a first determining module 504, coupled to the acquiring module 502, configured to determine, from among the multiple frame images, a first image when the page switching dividing line appears on the display page and a second image when the page switching dividing line disappears on the display page, and determine a first time when the first image appears; a second determining module 506, coupled to the first determining module 504, for determining a first pixel value in the second image, and a first duty ratio of the first pixel value to the pixel value included in the second image; a third determining module 508, coupled to the second determining module 506, configured to determine a third image and a second time when the third image appears in the multi-frame image according to the first duty ratio; the fourth determining module 510 is connected to the third determining module 508, and is configured to determine, according to the difference between the first time and the second time, a duration of displaying the first frame image of the video to be displayed in the target video.
Here, the above-mentioned obtaining module 502, the first determining module 504, the second determining module 506, the third determining module 508 and the fourth determining module 510 correspond to the steps S202 to S210 in the embodiment 1, and the plurality of modules are the same as the examples and application scenarios implemented by the corresponding steps, but are not limited to the disclosure of the above-mentioned embodiment one. It should be noted that the above-described module may be operated as a part of the apparatus in the computer terminal 10 provided in the first embodiment.
Example 3
According to an embodiment of the present invention, there is further provided a second apparatus for implementing the method for detecting a first frame time of a video, and fig. 6 is a block diagram of a second apparatus for detecting a first frame time of a video according to embodiment 3 of the present invention, as shown in fig. 6, where the apparatus includes: the display module 602, the receiving module 604 and the detecting module 606 are described below.
The display module 602 is configured to display a target video on a display interface, where the target video includes a video to be displayed; the receiving module 604 is connected to the display module 602, and is configured to receive a first frame image duration detection instruction on a display interface; the detection module 606 is connected to the receiving module 604, and is configured to respond to the first frame image duration detection instruction, play the target video on the display interface, and display a duration of the first frame image in which the video to be displayed is displayed in the target video, where the duration of the first frame image is determined according to a difference between a first time and a second time, the first time is a time when the first image appears, the second time is a time when the third image appears, the first image is an image when a page switching dividing line appears in a multi-frame image of the target video, the third image is an image determined according to a first pixel value included in the second image, and the first pixel value occupies a first duty ratio of a pixel value included in the second image, and the second image is an image when the page switching dividing line appears in the multi-frame image of the target video.
It should be noted that, the display module 602, the receiving module 604 and the detecting module 606 correspond to the steps S302 to S306 in the embodiment 1, and the plurality of modules are the same as the examples and the application scenarios implemented by the corresponding steps, but are not limited to the disclosure of the first embodiment. It should be noted that the above-described module may be operated as a part of the apparatus in the computer terminal 10 provided in the first embodiment.
Example 4
Embodiments of the present invention may provide a computer terminal, which may be any one of a group of computer terminals. Alternatively, in the present embodiment, the above-described computer terminal may be replaced with a terminal device such as a mobile terminal.
Alternatively, in this embodiment, the above-mentioned computer terminal may be located in at least one network device among a plurality of network devices of the computer network.
In this embodiment, the computer terminal may execute the program code of the following steps in the method for detecting the video first frame time of the application program: acquiring multi-frame images in a target video, wherein the target video comprises a video to be displayed; determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears in the display page in a multi-frame image, and determining the first time when the first image appears; determining a first pixel value in the second image and a first duty cycle of the first pixel value to the pixel value included in the second image; determining a third image and a second time when the third image appears in the multi-frame images according to the first duty ratio; and determining the duration of displaying the first frame image of the video to be displayed in the target video according to the difference value between the first time and the second time.
Alternatively, fig. 7 is a block diagram of a computer terminal according to an embodiment of the present invention. As shown in fig. 7, the computer terminal may include: one or more (only one is shown) processors 71, memory 72.
The memory may be used to store software programs and modules, such as program instructions/modules corresponding to the method and apparatus for detecting video first frame time in the embodiment of the present invention, and the processor executes the software programs and modules stored in the memory, thereby executing various functional applications and data processing, that is, implementing the method for detecting video first frame time. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory may further include memory remotely located with respect to the processor, the remote memory being connectable to the terminal through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The processor may call the information and the application program stored in the memory through the transmission device to perform the following steps: acquiring multi-frame images in a target video, wherein the target video comprises a video to be displayed; determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears in the display page in a multi-frame image, and determining the first time when the first image appears; determining a first pixel value in the second image and a first duty cycle of the first pixel value to the pixel value included in the second image; determining a third image and a second time when the third image appears in the multi-frame images according to the first duty ratio; and determining the duration of displaying the first frame image of the video to be displayed in the target video according to the difference value between the first time and the second time.
Optionally, the above processor may further execute program code for: determining a third image from the multi-frame images according to the first duty ratio, including: and traversing the image before the second image frame by frame under the condition that the first duty ratio is larger than a first preset threshold value, determining a second pixel value of a part of the image under the image page switching dividing line, and determining the image with the second duty ratio being smaller than the preset threshold value as a third image until the second duty ratio is smaller than the first preset threshold value.
Optionally, the above processor may further execute program code for: determining a third image from the multi-frame images according to the first duty ratio, including: and traversing the image after the second image frame by frame in the condition that the first duty ratio is smaller than the first preset threshold value, determining a third pixel value of the image, and selecting the image with the third duty ratio being larger than the first preset threshold value as the third image until the third duty ratio is larger than the first preset threshold value.
Optionally, the above processor may further execute program code for: determining a first image when a page switching dividing line appears on a display page in a multi-frame image, wherein the method comprises the following steps: determining an undetermined image when a page switching dividing line appears on a display page and a previous frame image of the undetermined image in the multi-frame images; determining the image similarity of the undetermined image and the image of the previous frame; and determining the undetermined image as the first image under the condition that the image similarity is larger than a second preset threshold value.
Optionally, the above processor may further execute program code for: determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears in a multi-frame image, wherein the method comprises the following steps: under the condition that an interference line segment appears in the target video, according to the image continuity among the multi-frame images, the interference line segment existing in the multi-frame images is ignored; and determining a first image when the page switching dividing line appears on the display page and a second image when the page switching dividing line disappears from the multi-frame image.
Optionally, the above processor may further execute program code for: after acquiring the multi-frame images in the target video, the method further comprises the following steps: and performing image binarization processing on the multi-frame images.
The processor may call the information and the application program stored in the memory through the transmission device to perform the following steps: displaying a target video on a display interface, wherein the target video comprises a video to be displayed; receiving a first frame image duration detection instruction at a display interface; and responding to the first frame image duration detection instruction, playing a target video on a display interface, and displaying the duration of the first frame image of the video to be displayed in the target video, wherein the duration of the first frame image is determined according to the difference value between the first time and the second time, the first time is the time when the first image appears, the second time is the time when the third image appears, in the multi-frame images of the target video, the first image is an image when a page switching parting line appears on a display page, the third image is an image determined according to the first pixel value included in the second image and the first duty ratio of the first pixel value to the pixel value included in the second image, and the second image is an image when the page switching parting line appears on the display page in the multi-frame images of the target video.
It will be appreciated by those skilled in the art that the configuration shown in fig. 7 is only illustrative, and the computer terminal may be a smart phone (such as an Android phone, an iOS phone, etc.), a tablet computer, a palm-phone computer, a mobile internet device (Mobile Internet Devices, MID), a PAD, etc. Fig. 7 is not limited to the structure of the electronic device. For example, the computer terminal 7 may also include more or fewer components (such as a network interface, a display device, etc.) than shown in fig. 7, or have a different configuration than shown in fig. 7.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program for instructing a terminal device to execute in association with hardware, the program may be stored in a computer readable storage medium, and the computer readable storage medium may include: flash disk, read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), magnetic or optical disk, and the like.
Example 5
Embodiments of the present invention also provide a computer-readable storage medium. Alternatively, in this embodiment, the computer readable storage medium may be used to store the program code executed by the video first frame time detection method provided in the first embodiment.
Alternatively, in this embodiment, the above-mentioned computer-readable storage medium may be located in any one of the computer terminals in the computer terminal group in the computer network, or in any one of the mobile terminals in the mobile terminal group.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: acquiring multi-frame images in a target video, wherein the target video comprises a video to be displayed; determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears in the display page in a multi-frame image, and determining the first time when the first image appears; determining a first pixel value in the second image and a first duty cycle of the first pixel value to the pixel value included in the second image; determining a third image and a second time when the third image appears in the multi-frame images according to the first duty ratio; and determining the duration of displaying the first frame image of the video to be displayed in the target video according to the difference value between the first time and the second time.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: determining a third image from the multi-frame images according to the first duty ratio, including: and traversing the image before the second image frame by frame under the condition that the first duty ratio is larger than a first preset threshold value, determining a second pixel value of a part of the image under the image page switching dividing line, and determining the image with the second duty ratio being smaller than the preset threshold value as a third image until the second duty ratio is smaller than the first preset threshold value.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: determining a third image from the multi-frame images according to the first duty ratio, including: and traversing the image after the second image frame by frame in the condition that the first duty ratio is smaller than the first preset threshold value, determining a third pixel value of the image, and selecting the image with the third duty ratio being larger than the first preset threshold value as the third image until the third duty ratio is larger than the first preset threshold value.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: determining a first image when a page switching dividing line appears on a display page in a multi-frame image, wherein the method comprises the following steps: determining an undetermined image when a page switching dividing line appears on a display page and a previous frame image of the undetermined image in the multi-frame images; determining the image similarity of the undetermined image and the image of the previous frame; and determining the undetermined image as the first image under the condition that the image similarity is larger than a second preset threshold value.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears in a multi-frame image, wherein the method comprises the following steps: under the condition that an interference line segment appears in the target video, according to the image continuity among the multi-frame images, the interference line segment existing in the multi-frame images is ignored; and determining a first image when the page switching dividing line appears on the display page and a second image when the page switching dividing line disappears from the multi-frame image.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: after acquiring the multi-frame images in the target video, the method further comprises the following steps: and performing image binarization processing on the multi-frame images.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: displaying a target video on a display interface, wherein the target video comprises a video to be displayed; receiving a first frame image duration detection instruction at a display interface; and responding to the first frame image duration detection instruction, playing a target video on a display interface, and displaying the duration of the first frame image of the video to be displayed in the target video, wherein the duration of the first frame image is determined according to the difference value between the first time and the second time, the first time is the time when the first image appears, the second time is the time when the third image appears, in the multi-frame images of the target video, the first image is an image when a page switching parting line appears on a display page, the third image is an image determined according to the first pixel value included in the second image and the first duty ratio of the first pixel value to the pixel value included in the second image, and the second image is an image when the page switching parting line appears on the display page in the multi-frame images of the target video.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, such as the division of the units, is merely a logical function division, and may be implemented in another manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a computer-readable storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned computer-readable storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (9)

1. A method for detecting a video first frame time, comprising:
acquiring multi-frame images in a target video, wherein the target video comprises a video to be displayed, and the target video is a video formed by recording;
determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears in the display page from the multi-frame images, and determining the first time when the first image appears;
determining a first pixel value in the second image and a first duty ratio of the first pixel value to a pixel value included in the second image, wherein the first pixel value is 0;
determining a third image and a second time when the third image appears in the multi-frame images according to the first duty ratio;
determining the duration of displaying the first frame image of the video to be displayed in the target video according to the difference value between the first time and the second time;
Wherein determining a third image from the multi-frame images according to the first duty ratio includes:
and traversing the image before the second image frame by frame under the condition that the first duty ratio is larger than a first preset threshold value, determining a second pixel value of a partial image below the page switching dividing line, and determining the image with the second duty ratio smaller than the preset threshold value as a third image until the second duty ratio is smaller than the first preset threshold value.
2. The method of claim 1, wherein determining a third image from the plurality of frames of images in accordance with the first duty cycle comprises:
and traversing the image after the second image frame by frame in a condition that the first duty ratio is smaller than a first preset threshold value, determining a third pixel value of the image, and selecting the image with the third duty ratio being larger than the first preset threshold value as a third image until the third duty ratio is larger than the first preset threshold value.
3. The method according to claim 1, wherein determining a first image when a page switching dividing line occurs in a display page from among the plurality of frame images includes:
Determining a pending image when a page switching dividing line appears on a display page and a previous frame image of the pending image from the multi-frame images;
determining the image similarity of the undetermined image and the previous frame image;
and determining the undetermined image as the first image under the condition that the image similarity is larger than a second preset threshold value.
4. The method according to claim 1, wherein determining, among the multi-frame images, a first image when a page-switching dividing line appears on a display page and a second image when the page-switching dividing line disappears on the display page, comprises:
under the condition that an interference line segment appears in the target video, neglecting the interference line segment existing in the multi-frame images according to the image continuity among the multi-frame images;
and determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears from the display page in the multi-frame images.
5. The method according to any one of claims 1 to 4, further comprising, after acquiring the multi-frame image in the target video:
And performing image binarization processing on the multi-frame images.
6. A method for detecting a video first frame time, comprising:
displaying a target video on a display interface, wherein the target video comprises a video to be displayed, and the target video is a video formed by recording;
receiving a first frame image duration detection instruction at the display interface;
responding to the first frame image duration detection instruction, playing the target video on the display interface, and displaying the duration of the first frame image of the video to be displayed in the target video, wherein the duration of the first frame image is determined according to the difference value between a first time and a second time, the first time is the time when a first image appears, the second time is the time when a third image appears, the first image is an image when a page switching dividing line appears in a multi-frame image of the target video, the third image is an image determined according to a first pixel value included in a second image and a first duty ratio of the first pixel value to the pixel value included in the second image, the second image is an image when the page switching dividing line appears in the multi-frame image of the target video, the first pixel value is 0, and the third image is determined, and the method comprises the steps of: and traversing the image before the second image frame by frame under the condition that the first duty ratio is larger than a first preset threshold value, determining a second pixel value of a partial image below the page switching dividing line, and determining the image with the second duty ratio smaller than the preset threshold value as a third image until the second duty ratio is smaller than the first preset threshold value.
7. A video first frame time detection apparatus, comprising:
the system comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring multi-frame images in a target video, the target video comprises a video to be displayed, and the target video is a video formed by recording;
the first determining module is used for determining a first image when a page switching dividing line appears on a display page and a second image when the page switching dividing line disappears on the display page in the multi-frame images, and determining the first time when the first image appears;
a second determining module, configured to determine a first pixel value in the second image, and a first duty ratio of the first pixel value to a pixel value included in the second image, where the first pixel value is 0;
a third determining module, configured to determine a third image and a second time when the third image appears in the multi-frame image according to the first duty ratio;
a fourth determining module, configured to determine, according to a difference between the first time and the second time, a duration of displaying a first frame image of the video to be displayed in the target video;
and the third determining module is further configured to, when the first duty ratio is greater than a first predetermined threshold, traverse the image before the second image frame by frame, determine a second pixel value of a partial image below the page switching dividing line, and determine that the image with the second duty ratio being less than the predetermined threshold is a third image until the second duty ratio is less than the first predetermined threshold.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program, when run, controls a device in which the computer-readable storage medium is located to perform the video head-time detection method of any one of claims 1 to 6.
9. A computer device, comprising: a memory and a processor, wherein the memory is configured to store,
the memory stores a computer program;
the processor configured to execute a computer program stored in the memory, the computer program when executed causing the processor to perform the video first frame time detection method of any one of claims 1 to 6.
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