CN113038243B - Transparency adjusting method and device in video source picture playing process - Google Patents
Transparency adjusting method and device in video source picture playing process Download PDFInfo
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- CN113038243B CN113038243B CN202110588046.XA CN202110588046A CN113038243B CN 113038243 B CN113038243 B CN 113038243B CN 202110588046 A CN202110588046 A CN 202110588046A CN 113038243 B CN113038243 B CN 113038243B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/485—End-user interface for client configuration
- H04N21/4854—End-user interface for client configuration for modifying image parameters, e.g. image brightness, contrast
Abstract
The invention relates to the technical field of LED display, and particularly discloses a transparency adjusting method and transparency adjusting equipment in a video source picture playing process, wherein the transparency adjusting method comprises the steps of obtaining a first initial transparency of a first video picture; acquiring a second target transparency of a second video picture; and gradually adjusting the transparency of the first video picture and the second video picture and synchronously displaying the first video picture and the second video picture on a program playing axis according to the first initial transparency, the second target transparency and a preset transparency adjustment strategy. The transparency adjusting method and the transparency adjusting equipment in the video source picture playing process solve the problem that the display effect of an LED display screen is poor due to the fact that the transparency of the previous video picture is reduced when the video pictures are switched and played, enable the fade-out process of the first video picture and the fade-in process of the second video picture to be in good transition, and cannot influence the final display effect of the LED display screen, so that the sensory experience of a user is improved.
Description
Technical Field
The invention relates to the technical field of LED display, in particular to a transparency adjusting method and device in a video source picture playing process.
Background
In the program playing software using the LED display screen, a base map can be put in a display area for playing a video source picture, and the video source picture is covered on the base map. The base map has the function of ensuring that the LED display screen can still normally display pictures when the pictures of the video source are lost. However, this method has problems: when at least two video source pictures exist in the display area, and when one original video source picture is switched to another video source picture for playing, the transparency of the original video source picture is reduced to zero, and at the moment, the originally covered base picture is obviously displayed in the video source pictures, so that certain influence is caused on the actual display effect of the LED display screen.
Therefore, there is a need to find a new technical solution to solve the above problems.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a transparency adjusting method and device in the video source picture playing process.
The invention discloses a transparency adjusting method in the video source picture playing process, which comprises the following steps:
acquiring a first initial transparency of a first video picture; the first initial transparency is the transparency of the first video picture when the first video picture is normally displayed;
acquiring a second target transparency of a second video picture; the second target transparency is the transparency of the second video image when being displayed normally;
and gradually adjusting the transparency of the first video picture and the second video picture and synchronously displaying the first video picture and the second video picture on a program playing axis according to the first initial transparency, the second target transparency and a preset transparency adjustment strategy.
Further, the transparency adjustment policy includes:
comparing the numerical values of the first initial transparency and the second target transparency to obtain a comparison result;
gradually increasing the transparency of the second video picture from the second initial transparency to the second target transparency, and simultaneously adjusting the transparency of the first video picture to gradually change from the first initial transparency to the first target transparency according to the comparison result; the value of the first target transparency is not equal to zero.
Further, the second initial transparency has a value of zero.
Further, the transparency adjustment policy further includes:
and if the transparency of the second video picture reaches the second target transparency and the transparency of the first video picture reaches the first target transparency, adjusting the transparency of the first video picture to be zero.
Further, the first target transparency is equal to the second target transparency.
Further, in the comparison results:
if the first initial transparency is smaller than the second target transparency, the transparency of the first video picture is gradually increased from the first initial transparency to the second target transparency;
if the first initial transparency is equal to the second target transparency, the transparency of the first video picture is kept unchanged;
if the first initial transparency is greater than the second target transparency, the transparency of the first video image is gradually reduced from the first initial transparency to the second target transparency.
Furthermore, the first video picture and the second video picture are synchronously displayed on a base map on a program playing axis, and the base map is a picture with low transparency.
Further, the bottom image is a picture with zero transparency.
The invention also provides transparency adjusting equipment in the video source picture playing process, wherein the transparency adjusting equipment comprises a transparency obtaining module and a transparency adjusting module, wherein:
the transparency obtaining module is connected with the transparency adjusting module and used for obtaining a first initial transparency of the first video picture and obtaining a second target transparency of the second video picture; the first initial transparency is the transparency when the first video picture is normally displayed, and the second target transparency is the transparency when the second video picture is normally displayed;
and the transparency adjusting module is connected with the transparency obtaining module and used for gradually adjusting the transparency of the first video picture and the second video picture and synchronously displaying the first video picture and the second video picture on a program playing axis according to the first initial transparency, the second target transparency and a preset transparency adjusting strategy.
Further, the transparency adjusting module comprises a transparency contrast unit and a transparency gradual change unit, wherein:
the transparency contrast unit is connected with the transparency gradual change unit;
the transparency comparison unit is used for comparing the numerical values of the first initial transparency and the second target transparency to obtain a comparison result;
the transparency gradual change unit is used for gradually increasing the transparency of the second video picture from a second initial transparency to a second target transparency and adjusting the transparency of the first video picture to gradually change from a first initial transparency to a first target transparency according to the comparison result; the value of the first target transparency is not equal to zero.
According to the transparency adjusting method and the transparency adjusting equipment in the video source picture playing process, the problem of poor display effect of an LED display screen caused by the fact that the transparency of the previous video picture is reduced when the video pictures are switched and played is solved, according to the first initial transparency, the second target transparency and the preset transparency adjusting strategy, the transparencies of the first video picture and the second video picture are gradually adjusted and are synchronously displayed on a program playing axis, the fade-out process of the first video picture and the fade-in process of the second video picture are good in transition, the final display effect of the LED display screen cannot be influenced, and therefore the sensory experience of a user is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart illustrating a transparency adjustment method during a video source picture playing process according to an embodiment of the present invention;
fig. 2 is a schematic diagram (a) illustrating transparency change of a transparency adjustment method during a video source picture playing process according to an embodiment of the present invention;
fig. 3 is a schematic diagram (ii) illustrating transparency change of a transparency adjustment method during a video source picture playing process according to an embodiment of the present invention;
fig. 4 is a schematic diagram (iii) illustrating transparency change of a transparency adjustment method during a video source picture playing process according to an embodiment of the present invention;
fig. 5 is a structural composition diagram (one) of a transparency adjustment device in a video source picture playing process according to an embodiment of the present invention;
fig. 6 is a structural composition diagram of a transparency adjustment apparatus during a video source picture playing process according to an embodiment of the present invention (ii).
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a transparency adjusting method for switching and playing front and back programs in the playing process of a video file by an LED screen, in particular to a transparency adjusting method in the playing process of a video source picture, as shown in figure 1, comprising the following steps:
step S10: and acquiring a first initial transparency of the first video picture.
The first initial transparency is the transparency when the first video picture is normally displayed, and the first video picture is the last frame picture of the first video file displayed before the video is switched and played.
Step S20: and acquiring a second target transparency of the second video picture.
And after the video switching is finished, all frame images of the second video file can be displayed according to the second target transparency.
The first initial transparency and the second target transparency are preset before the steps of the method are executed, and the values of the first initial transparency and the second target transparency can be set according to specific display requirements.
In this embodiment, steps S10 and S20 may be executed in reverse order, and only the first initial transparency and the second target transparency are acquired before step S30 is executed.
Step S30: and gradually adjusting the transparency of the first video picture and the second video picture and synchronously displaying the first video picture and the second video picture on a program playing axis according to the first initial transparency, the second target transparency and a preset transparency adjustment strategy.
The method comprises the steps of setting a first video picture and a second video picture on a program playing axis, namely, simultaneously displaying the first video picture and the second video picture on an LED display screen, wherein the transparency of the first video picture and the second video picture during displaying is determined by a first initial transparency, a second target transparency and a preset transparency adjustment strategy, so that the transparency of the first video picture and the transparency of the second video picture during the displaying time period are gradually changed, and therefore fade-out of the last frame picture of a first video file and fade-in of the first frame picture of a second video file are formed.
Preferably, the first video picture and the second video picture are synchronously displayed on the base map, the base map is a layer below the first video picture and the second video picture, and the first video picture and the second video picture are a layer above the base map. In this embodiment, in order to enable the pictures displayed by the first video file and the second video file during normal playing to be truly represented, the base map may be set as a picture with low transparency, and the base map with low transparency does not interfere with the content of the displayed picture, for example, a picture with a transparency value interval of 0 to 50 is selected, and most preferably, the base map is selected as a picture with transparency equal to 0.
When the original transparency of the first video picture is referred to as a, the original transparency of the second video picture is referred to as B, and the original transparency of the base map is referred to as C, the existing video picture fade-in and fade-out operation is to fade-in and fade-out the first video picture and the base map, and the second video picture is simultaneously faded-in and fade-out with the first video picture and the base map, and is available "
"to express the relation of transparency of the finally displayed picture, the above expression can be converted into"
”，“
All represent a percentage "
"expressed as object transparency of the first video picture"
"is the target transparency of the second video picture, so the target transparency to be achieved by the base map is"
The target transparency of the base map is affected by the target transparency of the first video picture and the second video picture, so that the target transparency cannot play a direct role, and the effect of the transition of the video pictures is affected to a certain extent. The method adopted by the embodiment of the invention can be expressed as follows: "
", so the target transparency of the base map in this embodiment is determined only by"
The value of "is set by a technician, and is not related to the target transparency of the first video picture and the second video picture, and the transparency of the first video picture and the transparency of the second video picture do not affect the transparency of the base map, and if the transparency of the base map is adjusted to 0, the base map does not affect the display of the first video picture and the second video picture at all.
Specifically, the transparency adjustment policy in the embodiment of the present invention includes:
and comparing the numerical values of the first initial transparency and the second target transparency to obtain a comparison result.
Gradually increasing the transparency of the second video picture from the second initial transparency to the second target transparency, and simultaneously adjusting the transparency of the first video picture to gradually change from the first initial transparency to the first target transparency according to the comparison result; the value of the first target transparency is not equal to zero.
The content of the first aspect included in the transparency adjustment policy of this embodiment is to compare the numerical values of the first initial transparency and the second target transparency, and the comparison relationship between the numerical values of the first initial transparency and the second target transparency includes three types: (1) the first initial transparency is greater than the second target transparency; (2) the first initial transparency is equal to the second target transparency; (3) the first initial transparency is less than the second target transparency.
On the other hand, the transparency adjustment policy of the present embodiment includes the content of the second aspect, which is to adjust the transparency of the second video image and the transparency of the first video image. Specifically, the transparency of the second video frame is gradually increased from the second initial transparency to the second target transparency, where the second initial transparency is the transparency of the second video frame initially displayed, and may be preset before the implementation of the method, for example, the value of the second initial transparency is zero, and the transparency of the second video frame is gradually increased from zero to the second target transparency. In the process that the transparency of the second video picture is gradually increased from the second initial transparency to the second target transparency, the transparency of the first video picture is gradually changed from the first initial transparency to the first target transparency, the value of the first target transparency is not equal to zero, the first target transparency is the transparency which is required to be achieved by the first video picture in the process that the transparency of the second video picture is gradually increased, the value of the first target transparency can be preset before the implementation of the method and is not set to zero, and the possible change situations of the first video picture include three situations according to the value size of the first target transparency, namely when the first target transparency is larger than the first initial transparency, the transparency of the first video picture shows an increased effect, or when the first target transparency is equal to the first initial transparency, the transparency of the first video picture shows a constant effect, or when the transparency of the first target is smaller than the first initial transparency, the transparency of the first video picture presents a reduced effect.
Preferably, if the first initial transparency is smaller than the second target transparency (or the first target transparency), the transparency of the first video picture is gradually increased from the first initial transparency to the second target transparency, as shown in fig. 2, B represents a value of the first initial transparency, a represents a value of the first target transparency, B is smaller than a, a line segment a represents a change of the transparency of the first video picture, a line segment B represents a change of the transparency of the second video picture, and a line segment a' represents a change of the transparency of the fade-out picture (i.e. the first initial transparency is directly decreased to zero) in the prior art. In this embodiment, the line segment is used to represent the change of the transparency, and since the slope of the line segment is a certain value, the transparencies of the first video picture and the second video picture in this embodiment are increased by equal values. As shown in fig. 3, if the first initial transparency is equal to the second target transparency (or the first target transparency), i.e. B is equal to a, the transparency of the first video image remains unchanged, as shown in fig. 3, a and B have equal values, the segment a is horizontal, the slope thereof is zero, the transparency of the first video image does not change, and the transparency of the segment B increases from zero to the second target transparency (or a). As shown in fig. 4, if the first initial transparency is greater than the second target transparency (or the first target transparency), i.e., b is greater than a, the transparency of the first video picture gradually decreases from the first initial transparency (b) to the second target transparency, or the first target transparency a, so the transparency of the first video picture exhibits a decreasing effect and the transparency of the second video picture exhibits an increasing effect. Therefore, in the process of fading out the first video picture and fading in the second video picture, the final transparency of the first video picture reaches the final transparency of the second video picture.
Specifically, as shown in fig. 2, 3, and 4, the transparency adjustment policy further includes: and if the transparency of the second video picture reaches the second target transparency and the transparency of the first video picture reaches the first target transparency, adjusting the transparency of the first video picture to be zero.
When the transparency of the first video picture is changed to the first target transparency (or the second target transparency), the fade-out operation of the first video picture is completed, that is, the time t is reached, after that, the transparency of the first video picture is gradually adjusted to zero, and the playing of the first video file is completely finished. During the period, the transparency of the second video picture reaches the second target transparency, the second video file is continuously displayed with the second target transparency, and the transition from the first video picture to the second video picture is completed. In this embodiment, the value of the time t is not limited, the time period from 0 to t is the time length for switching the first video picture to the second video picture, and the time period can be generally set to be not more than 0.5s to complete the process, so that the obvious play pause cannot be observed by human eyes.
The present invention further includes a transparency adjustment device in the video source picture playing process, as shown in fig. 5, the transparency adjustment device includes a transparency obtaining module 10 and a transparency adjustment module 20, wherein:
the transparency obtaining module 10 is connected to the transparency adjusting module 20, and is configured to obtain a first initial transparency of the first video image and obtain a second target transparency of the second video image; the first initial transparency is the transparency when the first video picture is normally displayed, and the second target transparency is the transparency when the second video picture is normally displayed.
And the transparency adjustment module 20 is connected to the transparency acquisition module 10, and configured to gradually adjust the transparency of the first video picture and the transparency of the second video picture according to the first initial transparency, the second target transparency, and a preset transparency adjustment policy, and to synchronously display the first video picture and the second video picture on one program playing axis.
Preferably, as shown in fig. 6, the transparency adjusting module 20 includes a transparency contrast unit 201 and a transparency gradient unit 202, wherein: the transparency contrast unit 201 is connected with the transparency gradual change unit 202; the transparency comparison unit 201 is configured to compare the numerical values of the first initial transparency and the second target transparency to obtain a comparison result; the transparency gradual change unit 202 is configured to gradually increase the transparency of the second video image from a second initial transparency to a second target transparency, and simultaneously adjust the transparency of the first video image to gradually change from the first initial transparency to the first target transparency according to the comparison result; the value of the first target transparency is not equal to zero.
The transparency adjusting device in the video source picture playing process realizes the transparency adjusting method in the video source picture playing process, and comprises the following steps:
step S10: and acquiring a first initial transparency of the first video picture.
Step S20: and acquiring a second target transparency of the second video picture.
Step S30: and gradually adjusting the transparency of the first video picture and the second video picture and synchronously displaying the first video picture and the second video picture on a program playing axis according to the first initial transparency, the second target transparency and a preset transparency adjustment strategy.
Specifically, the transparency adjustment policy includes:
comparing the numerical values of the first initial transparency and the second target transparency to obtain a comparison result;
gradually increasing the transparency of the second video picture from the second initial transparency to the second target transparency, and simultaneously adjusting the transparency of the first video picture to gradually change from the first initial transparency to the first target transparency according to the comparison result; the value of the first target transparency is not equal to zero; and
and if the transparency of the second video picture reaches the second target transparency and the transparency of the first video picture reaches the first target transparency, adjusting the transparency of the first video picture to be zero.
Wherein, according to the comparison result, the adjustment of the transparency of the first video image and the transparency of the second video image comprises the following steps:
if the first initial transparency is smaller than the second target transparency, the transparency of the first video picture is gradually increased from the first initial transparency to the second target transparency;
if the first initial transparency is equal to the second target transparency, the transparency of the first video picture is kept unchanged;
if the first initial transparency is greater than the second target transparency, the transparency of the first video image is gradually reduced from the first initial transparency to the second target transparency.
Preferably, the first video picture and the second video picture are synchronously displayed on the base map on a program playing axis, the base map is a layer below the first video picture and the second video picture, and the first video picture and the second video picture are a layer above the base map. In this embodiment, the base map may be set as a picture with low transparency, for example, a picture with a transparency value interval of 0 to 50 is selected, and most preferably, the base map is selected as a picture with transparency equal to 0.
According to the transparency adjusting method and the transparency adjusting device in the video source picture playing process, the problem that the display effect of an LED display screen is poor due to the fact that the transparency of the previous video picture is reduced when the video pictures are switched to be played is solved, according to the first initial transparency, the second target transparency and the preset transparency adjusting strategy, the transparency of the first video picture and the transparency of the second video picture are gradually adjusted and are synchronously displayed on a program playing axis, the fade-out process of the first video picture and the fade-in process of the second video picture are enabled to be in good transition, the final display effect of the LED display screen cannot be influenced, and therefore the sensory experience of a user is improved.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.
Claims (6)
1. A method for adjusting transparency in a video source picture playing process is characterized by comprising the following steps:
acquiring a first initial transparency of a first video picture; the first initial transparency is the transparency of the first video picture when the first video picture is normally displayed;
acquiring a second target transparency of a second video picture; the second target transparency is the transparency of the second video picture when the second video picture is normally displayed;
gradually adjusting the transparency of the first video picture and the second video picture and synchronously displaying the first video picture and the second video picture on a program playing axis according to the first initial transparency, the second target transparency and a preset transparency adjustment strategy;
the transparency adjustment policy includes:
comparing the numerical values of the first initial transparency and the second target transparency to obtain a comparison result;
gradually increasing the transparency of the second video picture from a second initial transparency to the second target transparency, and simultaneously adjusting the transparency of the first video picture to gradually change from the first initial transparency to the first target transparency according to the comparison result; the value of the first target transparency is not equal to zero; the first target transparency is equal to the second target transparency; and
and if the transparency of the second video picture reaches the second target transparency and the transparency of the first video picture reaches the first target transparency, adjusting the transparency of the first video picture to be zero.
2. The method as claimed in claim 1, wherein the second initial transparency value is zero.
3. The method as claimed in claim 2, wherein the comparison result comprises:
if the first initial transparency is smaller than the second target transparency, the transparency of the first video picture is gradually increased from the first initial transparency to the second target transparency;
if the first initial transparency is equal to the second target transparency, the transparency of the first video picture is kept unchanged;
if the first initial transparency is greater than the second target transparency, the transparency of the first video picture is gradually reduced from the first initial transparency to the second target transparency.
4. The method as claimed in claim 1, wherein the first video frame and the second video frame are synchronously displayed on a base map on a program playing axis, and the base map is a low transparency picture.
5. The method as claimed in claim 4, wherein the base map is a picture with zero transparency.
6. The transparency adjusting device in the video source picture playing process is characterized by comprising a transparency obtaining module and a transparency adjusting module, wherein:
the transparency obtaining module is connected with the transparency adjusting module and is used for obtaining a first initial transparency of a first video picture and obtaining a second target transparency of a second video picture; the first initial transparency is the transparency when the first video picture is normally displayed, and the second target transparency is the transparency when the second video picture is normally displayed;
the transparency adjusting module is connected with the transparency obtaining module and is used for gradually adjusting the transparency of the first video picture and the second video picture and synchronously displaying the first video picture and the second video picture on a program playing axis according to the first initial transparency, the second target transparency and a preset transparency adjusting strategy; the transparency adjustment policy includes: comparing the numerical values of the first initial transparency and the second target transparency to obtain a comparison result; gradually increasing the transparency of the second video picture from a second initial transparency to the second target transparency, and simultaneously adjusting the transparency of the first video picture to gradually change from the first initial transparency to the first target transparency according to the comparison result; the value of the first target transparency is not equal to zero; the first target transparency is equal to the second target transparency; and if the transparency of the second video picture reaches the second target transparency and the transparency of the first video picture reaches the first target transparency, adjusting the transparency of the first video picture to be zero.
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