CN111722964A - Screen-casting delay testing method and terminal - Google Patents
Screen-casting delay testing method and terminal Download PDFInfo
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- CN111722964A CN111722964A CN201910219516.8A CN201910219516A CN111722964A CN 111722964 A CN111722964 A CN 111722964A CN 201910219516 A CN201910219516 A CN 201910219516A CN 111722964 A CN111722964 A CN 111722964A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2273—Test methods
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
- G06V20/62—Text, e.g. of license plates, overlay texts or captions on TV images
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
Abstract
The invention provides a method and a terminal for testing screen-throwing time delay, wherein a first screen is thrown to a second screen, a stopwatch is played on the first screen, the first screen and the second screen are recorded to obtain a video file, each frame of the video file is converted into a picture to generate a picture list, the picture list is traversed to respectively obtain stopwatch information on the first screen and stopwatch information on the second screen in each frame of picture in the picture list, and the screen-throwing time delay corresponding to each frame of picture is obtained according to the stopwatch information on the first screen and the stopwatch information on the second screen; the screen-throwing time delay between the shared screens can be automatically tested, manpower is released, the testing efficiency is improved, each frame of picture can be accurately grabbed to calculate the time delay, the time point of missing videos is avoided, and the testing reliability is improved.
Description
Technical Field
The invention relates to the field of computer software, in particular to a screen-throwing delay testing method and a terminal.
Background
The screen projection is a technology for realizing screen sharing and multi-screen interaction, and specifically, a picture of a device a (such as a mobile phone, a computer or a tablet) is displayed on another device B (such as a mobile phone, a tablet or a television) in real time, and output contents include various multimedia information such as video, audio and documents, and a real-time operation picture on the device a. For example, a video of the mobile terminal can be projected to a television to improve the viewing experience. Or screen sharing is carried out at a teacher end and a student end through a screen projection technology in an intelligent classroom to finish detailed explanation of teaching contents, so that interactive teaching of teachers and students is realized, and teachers are helped to create colorful interactive classrooms.
However, screen sharing in the screen projection technology has a delay condition, and excessive delay time can seriously affect multi-screen interaction, so that the screen projection delay of a product needs to be tested and optimized to ensure the competitiveness of the product in the market when producing related products.
At present, a test scheme for testing the delay time of screen shot generally records videos of two shared screens manually, then performs screen shot manually at intervals of time according to the recorded videos, and compares the delay time according to the screen shot. Therefore, the repeated input of manual operation wastes manpower and is low in efficiency, each frame of picture cannot be accurately captured to calculate time delay for manual screenshot of the recorded video, missed video time points exist, and the reliability of the test is low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the screen-throwing delay testing method and the terminal can automatically test the screen-throwing delay between the shared screens, release manpower and improve testing efficiency.
In order to solve the technical problems, the invention adopts a technical scheme that:
a screen projection delay test method comprises the following steps:
s1, projecting the first screen to the second screen, playing a stopwatch on the first screen, and recording the first screen and the second screen to obtain a video file;
s2, converting each frame of the video file into a picture to generate a picture list;
and S3, traversing the picture list, respectively acquiring stopwatch information on a first screen and stopwatch information on a second screen in each picture frame in the picture list, and obtaining the screen projection delay corresponding to each picture frame according to the stopwatch information on the first screen and the stopwatch information on the second screen.
In order to solve the technical problem, the invention adopts another technical scheme as follows:
a screen-projection delay test terminal comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the computer program to realize the following steps:
s1, projecting the first screen to the second screen, playing a stopwatch on the first screen, and recording the first screen and the second screen to obtain a video file;
s2, converting each frame of the video file into a picture to generate a picture list;
and S3, traversing the picture list, respectively acquiring stopwatch information on a first screen and stopwatch information on a second screen in each picture frame in the picture list, and obtaining the screen projection delay corresponding to each picture frame according to the stopwatch information on the first screen and the stopwatch information on the second screen.
The invention has the beneficial effects that: the method comprises the steps of playing a stopwatch on a first screen by projecting the first screen to a second screen, recording the first screen and the second screen to obtain a video file, converting each frame of the video file into a picture, generating a picture list, traversing the picture list, respectively obtaining stopwatch information on the first screen and stopwatch information on the second screen in each picture frame in the picture list, and obtaining a screen projecting delay corresponding to each picture frame according to the stopwatch information on the first screen and the stopwatch information on the second screen; the screen-throwing time delay between the shared screens can be automatically tested, manpower is released, the testing efficiency is improved, each frame of picture can be accurately grabbed to calculate the time delay, the time point of missing videos is avoided, and the testing reliability is improved.
Drawings
Fig. 1 is a flowchart of a screen projection delay testing method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a screen-projection delay test terminal according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a certain frame of picture in a screen projection delay testing method according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a first stopwatch information sprite after clipping according to a method for testing screen-projection delay according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a second stopwatch information sprite after clipping according to the method for testing screen-casting delay of the present invention;
FIG. 6 is a schematic diagram of a first stopwatch information sub-picture after denoising, graying and binarization processing in a screen-casting delay testing method according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a second stopwatch information sub-picture after denoising, graying and binarization processing in the screen-casting delay testing method according to the embodiment of the invention;
fig. 8 is a detailed flowchart of a screen projection delay testing method according to an embodiment of the present invention.
Description of reference numerals:
1. a screen-projection delay test terminal; 2. a memory; 3. a processor.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The most key concept of the invention is as follows: and playing a stopwatch on the screen projecting screen and the screen to be projected and recording the stopwatch into a video, and obtaining corresponding screen projecting delay according to stopwatch information on each frame of picture in the video.
Referring to fig. 1, a method for testing screen projection delay includes:
s1, projecting the first screen to the second screen, playing a stopwatch on the first screen, and recording the first screen and the second screen to obtain a video file;
s2, converting each frame of the video file into a picture to generate a picture list;
and S3, traversing the picture list, respectively acquiring stopwatch information on a first screen and stopwatch information on a second screen in each picture frame in the picture list, and obtaining the screen projection delay corresponding to each picture frame according to the stopwatch information on the first screen and the stopwatch information on the second screen.
From the above description, the beneficial effects of the present invention are: the method comprises the steps of playing a stopwatch on a first screen by projecting the first screen to a second screen, recording the first screen and the second screen to obtain a video file, converting each frame of the video file into a picture, generating a picture list, traversing the picture list, respectively obtaining stopwatch information on the first screen and stopwatch information on the second screen in each picture frame in the picture list, and obtaining a screen projecting delay corresponding to each picture frame according to the stopwatch information on the first screen and the stopwatch information on the second screen; the screen-throwing time delay between the shared screens can be automatically tested, manpower is released, the testing efficiency is improved, each frame of picture can be accurately grabbed to calculate the time delay, the time point of missing videos is avoided, and the testing reliability is improved.
Further, the S2 includes:
s21, acquiring the number of generated pictures, and judging whether all the pictures are successfully converted according to the number of the generated pictures;
if not, returning to S2, otherwise, executing step S3.
According to the description, the subsequent test is carried out on the premise of ensuring that all the generated pictures are successfully converted, so that the quality and the integrity of the test are improved.
Further, the S3 includes:
traversing the picture list, and executing for each frame picture:
cutting stopwatch information of a first screen and stopwatch information of a second screen in the picture to respectively generate a first stopwatch information sub-picture and a second stopwatch information sub-picture;
respectively and sequentially carrying out denoising, graying and binaryzation on the first stopwatch information sub-picture and the second stopwatch information sub-picture;
and obtaining the screen projection time delay corresponding to the picture according to the processed first stopwatch information sub-picture and the processed second stopwatch information sub-picture.
From the above description, the stopwatch information is clipped to generate the stopwatch information sub-picture, and the drying, graying and binarization processing are sequentially performed, so that the stopwatch information is displayed more clearly, not only is the automation realized, but also the identification accuracy is improved.
Further, the obtaining of the screen-casting delay corresponding to the picture according to the processed first stopwatch information sub-picture and the processed second stopwatch information sub-picture includes:
and respectively carrying out OCR optical character recognition on the processed first stopwatch information word picture and the processed second stopwatch information word picture to obtain a corresponding first stopwatch character and a corresponding second stopwatch character, and calculating the difference value of the first stopwatch character and the second stopwatch character to obtain the screen projection delay corresponding to the pictures.
From the above description, the accuracy and correctness of recognition are improved by performing OCR optical character recognition on the stopwatch information picture.
Further, the step S3 is followed by:
and S4, counting the maximum screen-casting delay and the picture corresponding to the maximum screen-casting delay according to the screen-casting delay corresponding to each frame of picture in the picture list, counting the minimum screen-casting delay and the picture corresponding to the minimum screen-casting delay, and respectively recording the maximum screen-casting delay, the picture corresponding to the maximum screen-casting delay, the minimum screen-casting delay, the picture corresponding to the minimum screen-casting delay and the screen-casting delay of each frame of picture into a test report and outputting the test report.
According to the description, the information integrity of the test report is high, and the screen projection delay can be conveniently optimized and analyzed through the test report.
Referring to fig. 2, a screen-projection delay testing terminal includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the following steps when executing the computer program:
s1, projecting the first screen to the second screen, playing a stopwatch on the first screen, and recording the first screen and the second screen to obtain a video file;
s2, converting each frame of the video file into a picture to generate a picture list;
and S3, traversing the picture list, respectively acquiring stopwatch information on a first screen and stopwatch information on a second screen in each picture frame in the picture list, and obtaining the screen projection delay corresponding to each picture frame according to the stopwatch information on the first screen and the stopwatch information on the second screen.
From the above description, the beneficial effects of the present invention are: the method comprises the steps of playing a stopwatch on a first screen by projecting the first screen to a second screen, recording the first screen and the second screen to obtain a video file, converting each frame of the video file into a picture, generating a picture list, traversing the picture list, respectively obtaining stopwatch information on the first screen and stopwatch information on the second screen in each picture frame in the picture list, and obtaining a screen projecting delay corresponding to each picture frame according to the stopwatch information on the first screen and the stopwatch information on the second screen; the screen-throwing time delay between the shared screens can be automatically tested, manpower is released, the testing efficiency is improved, each frame of picture can be accurately grabbed to calculate the time delay, the time point of missing videos is avoided, and the testing reliability is improved.
Further, the S2 includes:
s21, acquiring the number of generated pictures, and judging whether all the pictures are successfully converted according to the number of the generated pictures;
if not, returning to S2, otherwise, executing step S3.
According to the description, the subsequent test is carried out on the premise of ensuring that all the generated pictures are successfully converted, so that the quality and the integrity of the test are improved.
Further, the S3 includes:
traversing the picture list, and executing for each frame picture:
cutting stopwatch information of a first screen and stopwatch information of a second screen in the picture to respectively generate a first stopwatch information sub-picture and a second stopwatch information sub-picture;
respectively and sequentially carrying out denoising, graying and binaryzation on the first stopwatch information sub-picture and the second stopwatch information sub-picture;
and obtaining the screen projection time delay corresponding to the picture according to the processed first stopwatch information sub-picture and the processed second stopwatch information sub-picture.
From the above description, the stopwatch information is clipped to generate the stopwatch information sub-picture, and the drying, graying and binarization processing are sequentially performed, so that the stopwatch information is displayed more clearly, not only is the automation realized, but also the identification accuracy is improved.
Further, the obtaining of the screen-casting delay corresponding to the picture according to the processed first stopwatch information sub-picture and the processed second stopwatch information sub-picture includes:
and respectively carrying out OCR optical character recognition on the processed first stopwatch information word picture and the processed second stopwatch information word picture to obtain a corresponding first stopwatch character and a corresponding second stopwatch character, and calculating the difference value of the first stopwatch character and the second stopwatch character to obtain the screen projection delay corresponding to the pictures.
From the above description, the accuracy and correctness of recognition are improved by performing OCR optical character recognition on the stopwatch information picture.
Further, the step S3 is followed by:
and S4, counting the maximum screen-casting delay and the picture corresponding to the maximum screen-casting delay according to the screen-casting delay corresponding to each frame of picture in the picture list, counting the minimum screen-casting delay and the picture corresponding to the minimum screen-casting delay, and respectively recording the maximum screen-casting delay, the picture corresponding to the maximum screen-casting delay, the minimum screen-casting delay, the picture corresponding to the minimum screen-casting delay and the screen-casting delay of each frame of picture into a test report and outputting the test report.
According to the description, the information integrity of the test report is high, and the screen projection delay can be conveniently optimized and analyzed through the test report.
Example one
Referring to fig. 1 and fig. 3 to 8, a method for testing screen projection delay includes:
s1, projecting the first screen to the second screen, playing a stopwatch on the first screen, and recording the first screen and the second screen to obtain a video file;
s2, converting each frame of the video file into a picture to generate a picture list;
specifically, capturing each frame of a video file and converting the frame into a picture, wherein the length and the width of the converted picture are equal;
referring to fig. 3, the left screen is a first screen, and the right screen is a second screen;
s21, acquiring the number of generated pictures, and judging whether all the pictures are successfully converted according to the number of the generated pictures;
if not, returning to S2, otherwise, executing step S3;
the number of the generated pictures corresponds to the number of frames of the video file;
s3, traversing the picture list, respectively acquiring stopwatch information on a first screen and stopwatch information on a second screen in each picture frame in the picture list, and obtaining a screen projection delay corresponding to each picture frame according to the stopwatch information on the first screen and the stopwatch information on the second screen;
wherein the S3 includes:
traversing the picture list, and executing for each frame picture:
cutting stopwatch information of a first screen and stopwatch information of a second screen in the picture to respectively generate a first stopwatch information sub-picture and a second stopwatch information sub-picture;
the position of the first screen position and the position of the second screen in each picture are fixed in each frame of picture, and the position of the stopwatch position of the first screen and the position of the stopwatch position of the second screen in each picture are fixed, so that the stopwatch information of the first screen and the stopwatch information of the second screen can be clipped as the position coordinates of the first screen and the second screen are fixed (the position coordinates of the first screen and the second screen are preset);
respectively and sequentially carrying out denoising, graying and binaryzation on the first stopwatch information sub-picture and the second stopwatch information sub-picture;
obtaining the screen projection delay corresponding to the picture according to the processed first stopwatch information sub-picture and the processed second stopwatch information sub-picture, specifically:
respectively carrying out OCR optical character recognition (converting image information into a usable computer input technology by utilizing a character recognition technology) on the processed first stopwatch information word picture and the processed second stopwatch information word picture to obtain a corresponding first stopwatch character and a corresponding second stopwatch character, and calculating the difference value of the first stopwatch character and the second stopwatch character to obtain a screen-casting delay corresponding to the pictures;
the clipped stopwatch information of the first screen and the stopwatch information of the second screen are respectively shown in fig. 4 and fig. 5, and the first stopwatch information sub-picture and the second stopwatch information sub-picture after denoising, graying (the grayscale refers to an image only containing brightness information and not containing color information, and is characterized in that the brightness changes continuously from dark to light, such as a black-and-white picture, namely, the brightness value of the picture is quantized) and binarization processing are specifically respectively shown in fig. 6 and fig. 7;
in the traversing process, after the time delay of the first screen and the second screen in the current picture is calculated, judging whether the current processed picture is the last picture, if not, executing S4, otherwise, returning to S3;
and S4, counting the maximum screen-casting delay and the corresponding picture thereof and the minimum screen-casting delay and the corresponding picture thereof according to the screen-casting delay corresponding to each frame of picture in the picture list, and respectively recording the screen-casting delay, the maximum screen-casting delay, the picture corresponding to the maximum screen-casting delay, the minimum screen-casting delay and the picture corresponding to the minimum screen-casting delay of each frame of picture to a test report and outputting the test report.
Example two
Referring to fig. 2, a screen-projection delay test terminal 1 includes a memory 2, a processor 3, and a computer program stored in the memory 2 and capable of running on the processor 3, where the processor 3 implements the steps in the first embodiment when executing the computer program.
In summary, according to the method and the terminal for testing screen-casting delay provided by the present invention, a first screen is projected to a second screen, a stopwatch is played on the first screen, the first screen and the second screen are recorded to obtain a video file, each frame of the video file is converted into a picture, a picture list is generated, the picture list is traversed to respectively obtain stopwatch information on the first screen and stopwatch information on the second screen in each picture frame in the picture list, and the screen-casting delay corresponding to each picture frame is obtained according to the stopwatch information on the first screen and the stopwatch information on the second screen; the screen-casting delay between the shared screens can be automatically tested, the manpower is released, the testing efficiency is improved, each frame of picture can be accurately captured to calculate the delay, the time point of missing videos is avoided, and the testing reliability is improved; the stopwatch information of the picture of each frame is cut, denoising, graying, binarization processing and OCR optical character recognition are sequentially performed, and recognition accuracy is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. A screen-projection delay testing method is characterized by comprising the following steps:
s1, projecting the first screen to the second screen, playing a stopwatch on the first screen, and recording the first screen and the second screen to obtain a video file;
s2, converting each frame of the video file into a picture to generate a picture list;
and S3, traversing the picture list, respectively acquiring stopwatch information on a first screen and stopwatch information on a second screen in each picture frame in the picture list, and obtaining the screen projection delay corresponding to each picture frame according to the stopwatch information on the first screen and the stopwatch information on the second screen.
2. The screen-projection delay test method of claim 1, wherein the step S2 is followed by:
s21, acquiring the number of generated pictures, and judging whether all the pictures are successfully converted according to the number of the generated pictures;
if not, returning to S2, otherwise, executing step S3.
3. The screen-projection delay test method of claim 1, wherein the S3 comprises:
traversing the picture list, and executing for each frame picture:
cutting stopwatch information of a first screen and stopwatch information of a second screen in the picture to respectively generate a first stopwatch information sub-picture and a second stopwatch information sub-picture;
respectively and sequentially carrying out denoising, graying and binaryzation on the first stopwatch information sub-picture and the second stopwatch information sub-picture;
and obtaining the screen projection time delay corresponding to the picture according to the processed first stopwatch information sub-picture and the processed second stopwatch information sub-picture.
4. The method for testing screen projection delay according to claim 3, wherein the obtaining of the screen projection delay corresponding to the picture according to the processed first stopwatch information sub-picture and the processed second stopwatch information sub-picture comprises:
and respectively carrying out OCR optical character recognition on the processed first stopwatch information word picture and the processed second stopwatch information word picture to obtain a corresponding first stopwatch character and a corresponding second stopwatch character, and calculating the difference value of the first stopwatch character and the second stopwatch character to obtain the screen projection delay corresponding to the pictures.
5. The screen-projection delay test method of any one of claims 1 to 4, wherein the step S3 is followed by further comprising:
and S4, counting the maximum screen-casting delay and the picture corresponding to the maximum screen-casting delay according to the screen-casting delay corresponding to each frame of picture in the picture list, counting the minimum screen-casting delay and the picture corresponding to the minimum screen-casting delay, and respectively recording the maximum screen-casting delay, the picture corresponding to the maximum screen-casting delay, the minimum screen-casting delay, the picture corresponding to the minimum screen-casting delay and the screen-casting delay of each frame of picture into a test report and outputting the test report.
6. A screen-projection delay test terminal comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, and is characterized in that the processor executes the computer program to realize the following steps:
s1, projecting the first screen to the second screen, playing a stopwatch on the first screen, and recording the first screen and the second screen to obtain a video file;
s2, converting each frame of the video file into a picture to generate a picture list;
and S3, traversing the picture list, respectively acquiring stopwatch information on a first screen and stopwatch information on a second screen in each picture frame in the picture list, and obtaining the screen projection delay corresponding to each picture frame according to the stopwatch information on the first screen and the stopwatch information on the second screen.
7. The screen-casting delay test terminal of claim 6, wherein the step S2 is followed by:
s21, acquiring the number of generated pictures, and judging whether all the pictures are successfully converted according to the number of the generated pictures;
if not, returning to S2, otherwise, executing step S3.
8. The screen-casting delay test terminal of claim 7, wherein the S3 comprises:
traversing the picture list, and executing for each frame picture:
cutting stopwatch information of a first screen and stopwatch information of a second screen in the picture to respectively generate a first stopwatch information sub-picture and a second stopwatch information sub-picture;
respectively and sequentially carrying out denoising, graying and binaryzation on the first stopwatch information sub-picture and the second stopwatch information sub-picture;
and obtaining the screen projection time delay corresponding to the picture according to the processed first stopwatch information sub-picture and the processed second stopwatch information sub-picture.
9. The screen-casting delay test terminal of claim 8, wherein obtaining the screen-casting delay corresponding to the picture according to the processed first stopwatch information sub-picture and the second stopwatch information sub-picture comprises:
and respectively carrying out OCR optical character recognition on the processed first stopwatch information word picture and the processed second stopwatch information word picture to obtain a corresponding first stopwatch character and a corresponding second stopwatch character, and calculating the difference value of the first stopwatch character and the second stopwatch character to obtain the screen projection delay corresponding to the pictures.
10. The screen-casting delay test terminal of any one of claims 6 to 9, further comprising after the S3:
and S4, counting the maximum screen-casting delay and the picture corresponding to the maximum screen-casting delay according to the screen-casting delay corresponding to each frame of picture in the picture list, counting the minimum screen-casting delay and the picture corresponding to the minimum screen-casting delay, and respectively recording the maximum screen-casting delay, the picture corresponding to the maximum screen-casting delay, the minimum screen-casting delay, the picture corresponding to the minimum screen-casting delay and the screen-casting delay of each frame of picture into a test report and outputting the test report.
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| CN112929240A (en) * | 2021-03-23 | 2021-06-08 | 北京字节跳动网络技术有限公司 | Method, device, terminal and non-transitory storage medium for acquiring communication delay time |
| CN112994980A (en) * | 2021-03-02 | 2021-06-18 | 北京百度网讯科技有限公司 | Time delay testing method and device, electronic equipment and storage medium |
| CN114398017A (en) * | 2022-01-13 | 2022-04-26 | 百度在线网络技术（北京）有限公司 | Time delay detection method and device and electronic equipment |
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