CN106331828B - The method and system of subtitle are adjusted according to picture - Google Patents
The method and system of subtitle are adjusted according to picture Download PDFInfo
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- CN106331828B CN106331828B CN201610695236.0A CN201610695236A CN106331828B CN 106331828 B CN106331828 B CN 106331828B CN 201610695236 A CN201610695236 A CN 201610695236A CN 106331828 B CN106331828 B CN 106331828B
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- display area
- subtitle
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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
-
- 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
- H04N21/4858—End-user interface for client configuration for modifying screen layout parameters, e.g. fonts, size of the windows
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Controls And Circuits For Display Device (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The application discloses the method and system that subtitle is adjusted according to picture, method includes: the Subtitle Demonstration parameter being arranged in video pictures, the width of video pictures is obtained in real time, the width that Subtitle Demonstration is gone is calculated according to the width of video pictures, the maximum font size that caption display area can accommodate is calculated according to the width of caption display area, the width of the maximum font size and current subtitle display area that can be accommodated according to the caption display area, calculate the line number shown needed for current subtitle content, then the display position of every row subtitle is calculated, the maximum font size that can be finally accommodated according to caption display area, the line number shown needed for current subtitle content, and the display position of every row subtitle, caption content is shown to the caption display area.In this manner, size of caption can be adjusted according to video pictures width adequate, without making subtitle become excessive or too small with the scaling of video, so that subtitle, which meets user, watches demand, the user experience is improved.
Description
Technical field
This application involves video caption play-back technology fields, specifically, being related to a kind of side for adjusting subtitle according to picture
Method and system.
Background technique
In video display process, subtitle receives video content information convenient for user as a kind of except video speech
Form facilitates user to watch video.Player under current many Mac, subtitle are all that view is synthesized to by manual control
In frequency frame picture, when video pictures zoom in and out, the font of subtitle also follows picture to zoom in and out, if picture contracts
Small, the subtitle that subtitle also and then can contract too small, and have can not enter a new line automatically after being synthesized in picture, be unfavorable for according to picture
Scaling needs to adjust subtitle, influences user's viewing effect.And the XCode control CATextlayer under existing Mac cannot
Carry out subtitle carry out bottom end alignment, using this control realize Subtitle Demonstration also have can not bottom end be aligned the problem of.
In the prior art, during picture scales, subtitle cannot follow video pictures content to carry out adaptive change,
It can be only changed according to ratio, when video is excessive or too small, subtitle also can be excessive or too small, and user experience effect is very poor.
If player is realized using the CATextlayer under XCode under mac, subtitle can not bottom end alignment, using top
End alignment, such subtitle line number will feel that vision has confusion when changing, and not meet normal subtitle habit, equally to user with
Undesirable visual effect is carried out.
Summary of the invention
In view of this, the technical problem to be solved by the application is to provide a kind of according to picture adjustment subtitle method and is
System can adjust size of caption according to video pictures width adequate, without making subtitle become excessive with the scaling of video
Or it is too small, so that subtitle, which meets user, watches demand, the user experience is improved.
In order to solve the above-mentioned technical problem, the application has following technical solution:
A method of subtitle is adjusted according to picture, comprising:
Subtitle Demonstration parameter in video pictures is set, and the Subtitle Demonstration parameter includes at least: on caption display area
Max number of characters that every row is shown, minimum display font size, maximum display font size, caption display area away from video pictures left end away from
From d1, caption display area away from video pictures right end distance d2 and caption display area the distance away from video pictures bottom end
d3；
In real time obtain video pictures width d0, according to the width d0 of the video pictures, the caption display area away from
The distance d2 of distance d1 and the caption display area away from video pictures right end of video pictures left end calculates Subtitle Demonstration
The width d4, d4=d0-d1-d2 in region；
Max number of characters, the minimum shown according to the width of the caption display area, every row shows font size
With the maximum display font size, the maximum font size that the caption display area can accommodate is calculated；
The width of the maximum font size and current subtitle display area that can be accommodated according to the caption display area calculates
The line number shown needed for current subtitle content；
The row of display needed for the maximum font size that can be accommodated according to the caption display area, the current subtitle content
Several and described distance of the caption display area away from video pictures bottom end, calculates the display position of every row subtitle, so that close to institute
The first row subtitle bottom and the distance between the video pictures bottom end for stating video pictures bottom end remain d3；
The row of display needed for the maximum font size that can be accommodated according to the caption display area, the current subtitle content
The display position of several and described every row subtitle, is shown to the caption display area for caption content.
Preferably, in which:
The maximum font size that the caption display area can accommodate is calculated, further are as follows:
The minimum display font size is set by font size, the function provided using propertystring class in ObjectC is calculated
The width of each character under current font size；
According to the width of the width of the caption display area and each character, the caption display area is calculated
The number of characters that width range can accommodate；
Judge whether the number of characters is more than max number of characters that every row is shown, if being more than, font size is added 1, then
The number of characters that the width of the width and the caption display area that calculate corresponding character can accommodate, until current font size is being worked as
The number of characters that every row is shown under the width of preceding caption display area is less than or equal to the max number of characters or current font size reaches institute
State maximum display font size, the font size obtained at this time is the word under meeting size range and max number of characters that every row is shown
The maximum font size that curtain display area can accommodate.
Preferably, in which:
The line number shown needed for current subtitle content is calculated, further are as follows:
It according to the size of current font size, calculates under current font size, the overall width of current subtitle content；
With the overall width of the calculated caption content divided by the width of the caption display area, current subtitle is obtained
The line number shown needed for content.
Preferably, in which:
The display position of every row subtitle is calculated, further are as follows:
It according to the size of current font size, calculates under current font size, the height d5 of every row subtitle；
Distance of the bottom end of the 1st row subtitle of number apart from the video pictures bottom end from bottom to up since video pictures bottom
Distance d3 for the caption display area away from video pictures bottom end, the top of line n subtitle is apart from the video pictures bottom end
Distance be d3+n*d5.
Preferably, in which:
Further comprise:
40 are set by the max number of characters that every row is shown, sets 22 for the minimum display font size, it will be described
Maximum display font size is set as 50, sets 100 pixels away from the distance d1 of video pictures left end for the caption display area,
By the caption display area away from the distance d2 of video pictures right end be set as 100 pixels, by the caption display area away from
The distance d3 of video pictures bottom end is set as 40 pixels.
A kind of system that subtitle is adjusted according to picture characterized by comprising parameter setting module, caption display area
Width computing module, caption display area font size computing module, caption display area line number computing module, captions displaying location meter
It calculates module and subtitle insmods,
The parameter setting module, the Subtitle Demonstration parameter for being arranged in video pictures, the Subtitle Demonstration parameter is extremely
It less include: the max number of characters, minimum display font size, maximum display font size, Subtitle Demonstration that every row is shown on caption display area
Region distance d1, caption display area away from video pictures left end distance d2 and Subtitle Demonstration area away from video pictures right end
Distance d3 of the domain away from video pictures bottom end；
The caption display area width computing module, for obtaining the width d0 of video pictures in real time, according to the view
Distance d1 of the width d0, the caption display area of frequency picture away from video pictures left end and the caption display area away from
The distance d2 of video pictures right end calculates the width d4, d4=d0-d1-d2 of caption display area；
The caption display area font size computing module, for width, the every row according to the caption display area
The max number of characters of display, the minimum display font size and the maximum display font size, calculate caption display area institute energy
The maximum font size of receiving；
The caption display area line number computing module, the maximum word for that can be accommodated according to the caption display area
Number and current subtitle display area width, calculate current subtitle content needed for show line number；
The captions displaying location computing module, maximum font size for that can be accommodated according to the caption display area,
The distance of line number and the caption display area away from video pictures bottom end shown needed for the current subtitle content calculates
The display position of every row subtitle, so that close to the first row subtitle bottom and the video pictures bottom end of the video pictures bottom end
The distance between remain d3；
The subtitle insmods, maximum font size for that can be accommodated according to the caption display area, described current
The display position of the line number and every row subtitle that show needed for caption content, is shown to the subtitle for caption content and shows
Show region.
Preferably, in which:
The caption display area font size computing module, is further used for:
The minimum display font size is set by font size, the function provided using propertystring class in ObjectC is calculated
The width of each character under current font size；
According to the width of the width of the caption display area and each character, the caption display area is calculated
The number of characters that width range can accommodate；
Judge whether the number of characters is more than max number of characters that every row is shown, if being more than, font size is added 1, then
The number of characters that the width of the width and the caption display area that calculate corresponding character can accommodate, until current font size is being worked as
The number of characters that every row is shown under the width of preceding caption display area is less than or equal to the max number of characters or current font size reaches institute
State maximum display font size, the font size obtained at this time is the word under meeting size range and max number of characters that every row is shown
The maximum font size that curtain display area can accommodate.
Preferably, in which:
The caption display area line number computing module, is further used for:
It according to the size of current font size, calculates under current font size, the overall width of current subtitle content；
With the overall width of the calculated caption content divided by the width of the caption display area, current subtitle is obtained
The line number shown needed for content.
Preferably, in which:
The captions displaying location computing module, is further used for:
It according to the size of current font size, calculates under current font size, the height d5 of every row subtitle；
Distance of the bottom end of the 1st row subtitle of number apart from the video pictures bottom end from bottom to up since video pictures bottom
Distance d3 for the caption display area away from video pictures bottom end, the top of line n subtitle is apart from the video pictures bottom end
Distance be d3+n*d5.
Preferably, in which:
The max number of characters that every row is shown is 40, and the minimum display font size is 22, and the maximum display font size is
50, the d1=100 pixel of distance of the caption display area away from video pictures left end, the caption display area is drawn away from video
The d3=40 pixel of distance of d2=100 pixel of distance, the caption display area away from video pictures bottom end of face right end.
Compared with prior art, method and system described herein achieving the following effects:
First, the method and system provided by the present invention that subtitle is adjusted according to picture can obtain video pictures in real time
Width, and the font size of subtitle and the line number of display can be adjusted in real time according to the width of video pictures so that no matter video pictures
How to change, the font size of subtitle is in always in the range of minimum display font size and maximum display font size, avoid subtitle with
The stretching of picture and become excessive or too small so that the size of subtitle is in preferable font size model with the variation of video pictures always
In enclosing, the experience effect of user is effectively improved while meeting the viewing demand of user.
Second, the method and system provided by the present invention that subtitle is adjusted according to picture can be to caption display area
Position is set, so that position does not exceed certain range when Subtitle Demonstration, but also enables to no matter show several rows
When subtitle, bottom alignment can be realized always, when avoiding display line number has multirow, Subtitle Demonstration is random and chaotic to be showed
As bringing good visual experience effect to user.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is a kind of flow chart for the method that subtitle is adjusted according to picture of the invention；
Fig. 2 is a kind of structure chart for the system that subtitle is adjusted according to picture of the invention；
Fig. 3 is a kind of flow chart of the embodiment for the method that subtitle is adjusted according to picture of the invention.
Specific embodiment
As used some vocabulary to censure specific components in the specification and claims.Those skilled in the art answer
It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name
The difference of title is as the mode for distinguishing component, but with the difference of component functionally as the criterion of differentiation.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer within the acceptable error range, those skilled in the art can within a certain error range solve described in
Technical problem basically reaches the technical effect.In addition, " coupling " word includes any direct and indirect electric property coupling herein
Means.Therefore, if it is described herein that a first device is coupled to a second device, then representing the first device can directly electrical coupling
It is connected to the second device, or the second device indirectly electrically coupled through other devices or coupling means.Specification
Subsequent descriptions be implement the application better embodiment, so it is described description be for the purpose of the rule for illustrating the application,
It is not intended to limit the scope of the present application.The protection scope of the application is as defined by the appended claims.
Embodiment 1
Shown in Figure 1 is the specific embodiment of a kind of herein described method that subtitle is adjusted according to picture, this method
Include:
Subtitle Demonstration parameter in step 101, setting video pictures, the Subtitle Demonstration parameter include at least: subtitle is aobvious
Show every row is shown on region max number of characters, minimum display font size, maximum display font size, caption display area away from video pictures
Distance d2 and caption display area of the distance d1, caption display area of left end away from video pictures right end are away from video pictures bottom
The distance d3 at end；
Step 102, the width d0 for obtaining video pictures in real time, it is aobvious according to the width d0 of the video pictures, the subtitle
Show distance d1 and caption display area distance d2 away from video pictures right end of the region away from video pictures left end, calculates
The width d4, d4=d0-d1-d2 of caption display area；
Step 103, max number of characters, the minimum shown according to width, the every row of the caption display area
It shows font size and the maximum display font size, calculates the maximum font size that the caption display area can accommodate；
Step 104, the maximum font size that can be accommodated according to the caption display area and current subtitle display area
Width calculates the line number shown needed for current subtitle content；
It is shown needed for step 105, the maximum font size that can be accommodated according to the caption display area, the current subtitle content
The distance of line number and the caption display area away from video pictures bottom end shown, calculates the display position of every row subtitle, so that
D3 is remained close to the distance between the first row subtitle bottom of the video pictures bottom end and the video pictures bottom end；
It is shown needed for step 106, the maximum font size that can be accommodated according to the caption display area, the current subtitle content
The display position of the line number and every row subtitle shown, is shown to the caption display area for caption content.
Through the above steps 101, the max number of characters that can be shown in every row subtitle on caption display area is set, so that
The number of characters that every row is shown is not more than the max number of characters.By the minimum display font size of setting and maximum display font size, by subtitle
The size of middle text is arranged in the interval range, even if video pictures are stretched or reduce, the size of text also can in subtitle
It remains within the scope of this, will not become excessive or too small with video pictures, give the good visual experience effect of spectators.Pass through
Be arranged distance d2 away from video pictures right end of distance d1, caption display area of the caption display area away from video pictures left end, with
And the first row subtitle bottom of close video pictures bottom end exists caption display area control away from the distance d3 of video pictures bottom end
In position range defined by these parameters, meets while user watches demand and promote user experience effect.
In above-mentioned steps 103, the maximum font size that the caption display area can accommodate is calculated, further are as follows:
The minimum display font size is set by font size, is calculated using the function that propertystring class in ObjectC provides
The width of each character under current font size；
According to the width of the width of the caption display area and each character, the caption display area is calculated
The number of characters that width range can accommodate is used the width of caption display area divided by the width of each character, then is rounded
Obtain the number of characters that the width range of caption display area can accommodate；
Judge whether the number of characters is more than max number of characters that every row is shown, if being more than, font size is added 1, then
The number of characters that the width of the width and the caption display area that calculate corresponding character can accommodate, until current font size is being worked as
The number of characters that every row is shown under the width of preceding caption display area is less than or equal to the max number of characters or current font size reaches institute
State maximum display font size, the font size obtained at this time is the word under meeting size range and max number of characters that every row is shown
The maximum font size that curtain display area can accommodate.
By the above method, acquired while having met size range and the max number of characters that shows no more than every row this
Maximum font size under the conditions of two, can't because video pictures width is excessive or too small and cause font size excessive or it is too small so that
Influence viewing.
In above-mentioned steps 104, the line number shown needed for current subtitle content is calculated, further are as follows:
It according to the size of current font size, calculates under current font size, the overall width of current subtitle content, wherein current subtitle
The overall width of content is the sum of the width of each character under current font size；
With the overall width of the calculated caption content divided by the width of the caption display area, current subtitle is obtained
The line number shown needed for content.For example, the width of caption display area is if the overall width of calculated caption content is 45
30, use 45 is 1.5 divided by 30 result, then represents the line number of display needed for current subtitle content as 2 rows.
In above-mentioned steps 105, the display position of every row subtitle is calculated, further are as follows:
It according to the size of current font size, calculates under current font size, the height d5 of every row subtitle；
Distance of the bottom end of the 1st row subtitle of number apart from the video pictures bottom end from bottom to up since video pictures bottom
Distance d3 for the caption display area away from video pictures bottom end, the top of line n subtitle is apart from the video pictures bottom end
Distance be d3+n*d5.
If caption content need to divide 3 rows to be shown, then the 1st row of number and the video from bottom to up since video pictures bottom
The distance of picture bottom end remains constant, is d3, and the top of the 2nd row subtitle is d3+2*d5 at a distance from video pictures bottom end,
3rd row top is d3+3*d5 at a distance from video pictures bottom end.
After font size and captions displaying location determine, by step 106 by caption content according to calculated font size and
Position is shown in caption display area.
The method that the application adjusts subtitle according to picture, through the above steps 101, further every row is shown most
Big number of characters is set as 40, sets 22 for the minimum display font size, sets 50 for the maximum display font size, will be described
Caption display area is set as 100 pixels away from the distance d1 of video pictures left end, and the caption display area is drawn away from video
The distance d2 of face right end is set as 100 pixels, sets the caption display area to away from the distance d3 of video pictures bottom end
40 pixels.By the setting of these parameters, the font size of subtitle and position are arranged in reasonable position, the viewing of user is met
Demand, and the visual experience effect of user can be promoted.
Embodiment 2
Shown in Figure 2 is a kind of specific embodiment of herein described system that subtitle is adjusted according to picture, the system
It include: parameter setting module 10, caption display area width computing module 20, caption display area font size computing module 30, word
Curtain display area line number computing module 40, captions displaying location computing module 50 and subtitle insmod 60,
The parameter setting module 10, the Subtitle Demonstration parameter for being arranged in video pictures, the Subtitle Demonstration parameter
Include at least: every row is shown on caption display area max number of characters, minimum display font size, maximum display font size, subtitle are aobvious
Show distance d1, caption display area distance d2 and Subtitle Demonstration away from video pictures right end of the region away from video pictures left end
Distance d3 of the region away from video pictures bottom end；
The caption display area width computing module 20, for obtaining the width d0 of video pictures in real time, according to described
Distance d1 and the caption display area of the width d0, the caption display area of video pictures away from video pictures left end
Distance d2 away from video pictures right end calculates the width d4, d4=d0-d1-d2 of caption display area；
The caption display area font size computing module 30, for according to the width of the caption display area, described every
The max number of characters of row display, the minimum display font size and the maximum display font size, calculate the caption display area institute
The maximum font size that can be accommodated；
The caption display area line number computing module 40, the maximum for that can be accommodated according to the caption display area
Font size and the width of current subtitle display area calculate the line number shown needed for current subtitle content；
The captions displaying location computing module 50, the maximum word for that can be accommodated according to the caption display area
Number, the distance of line number and the caption display area away from video pictures bottom end that shows needed for the current subtitle content, meter
The display position of every row subtitle is calculated, so that close to the first row subtitle bottom end and the video pictures bottom of the video pictures bottom end
The distance between end remains d3；
The subtitle insmods 60, and maximum font size for that can be accommodated according to the caption display area described is worked as
The display position of the line number and every row subtitle that show needed for preceding caption content, is shown to the subtitle for caption content
Display area.
Parameter setting module 10 in the application, can be arranged on caption display area can show most in every row subtitle
Big number of characters, so that the number of characters that every row is shown is no more than the max number of characters；It can also by the minimum display font size of setting and most
Big display font size, the size of text in subtitle is arranged in the interval range, even if video pictures are stretched or reduce, subtitle
The size of middle text can also remain within the scope of this, will not become excessive or too small with video pictures, good to spectators
Visual experience effect.Parameter setting module 10 in the application also by setting caption display area away from video pictures left end away from
From d1, caption display area away from video pictures right end distance d2 and caption display area the distance away from video pictures bottom end
D3 controls caption display area in the position range defined by these parameters, meets promotion while user watches demand
User experience effect.
Above-mentioned caption display area font size computing module 30, is further used for:
The minimum display font size is set by font size, the function provided using propertystring class in ObjectC is calculated
The width of each character under current font size；
According to the width of the width of the caption display area and each character, the caption display area is calculated
The number of characters that width range can accommodate；
Judge whether the number of characters is more than max number of characters that every row is shown, if being more than, font size is added 1, then
The number of characters that the width of the width and the caption display area that calculate corresponding character can accommodate, until current font size is being worked as
The number of characters that every row is shown under the width of preceding caption display area is less than or equal to the max number of characters or current font size reaches institute
State maximum display font size, the font size obtained at this time is the word under meeting size range and max number of characters that every row is shown
The maximum font size that curtain display area can accommodate.
Calculating by caption display area font size computing module 30 to font size, acquired and meanwhile meet size range with
And maximum font size of the max number of characters shown no more than every row under the conditions of the two, it can't be excessive because of video pictures width
It is too small and cause font size excessive or it is too small thus influence viewing.
Above-mentioned caption display area line number computing module 40, is further used for:
It according to the size of current font size, calculates under current font size, the overall width of current subtitle content, wherein current subtitle
The overall width of content is the sum of the width of each character under current font size；
With the overall width of the calculated caption content divided by the width of the caption display area, current subtitle is obtained
The line number shown needed for content.For example, the width of caption display area is if the overall width of calculated caption content is 45
30, use 45 is 1.5 divided by 30 result, then represents the line number of display needed for current subtitle content as 2 rows.
Above-mentioned captions displaying location computing module 50, is further used for:
It according to the size of current font size, calculates under current font size, the height d5 of every row subtitle；
Distance of the bottom end of the 1st row subtitle of number apart from the video pictures bottom end from bottom to up since video pictures bottom
Distance d3 for the caption display area away from video pictures bottom end, the top of line n subtitle is apart from the video pictures bottom end
Distance be d3+n*d5.
If caption content need to divide 3 rows to be shown, then the 1st row of number and the video from bottom to up since video pictures bottom
The distance of picture bottom end remains constant, is d3, and the top of the 2nd row subtitle is d3+2*d5 at a distance from video pictures bottom end,
The top of 3rd row subtitle is d3+3*d5 at a distance from video pictures bottom end.
Preferably, the parameter setting module 10 in the application is as follows to the facilities of parameters:
The max number of characters that every row is shown is 40, and minimum display font size is 22, and maximum display font size is 50, Subtitle Demonstration area
The d1=100 pixel of distance of domain away from video pictures left end, distance d2=100 of the caption display area away from video pictures right end are a
The d3=40 pixel of distance of pixel, caption display area away from video pictures bottom end.
Embodiment 3
A kind of present invention presented below adjusts the Application Example of the method for subtitle according to picture, specific to wrap referring to Fig. 3
It includes:
Step 201, setting Subtitle Demonstration parameter.It is herein that every row is at most aobvious including the range that the setting every row of subtitle is shown
The number of characters shown is set as 38 (Chinese and English are all such), sets minimum display font size as No. 18, maximum display font size is 40
Number, distance of the caption area away from video pictures left end is set as 80 pixels, the distance away from video pictures right end is 80 pixels,
It is 50 pixels away from video pictures bottom end.
The indication range of the every row of subtitle, minimum display font size and maximum display font size are set so that subtitle with
While variation with picture, avoid subtitle excessive or too small with picture draw reduction.In addition, by setting caption area away from
Video pictures left end, right end and bottom end distance, so that it may when guaranteeing Subtitle Demonstration, position does not exceed a certain range or leans on very much
Nearly bottom end, influences viewing effect.
Step 202, when showing a subtitle, the width of caption area can be shown by calculating, i.e. (video pictures width-
80 pixels of distance of the 80 pixel-caption areas of distance of caption area away from video pictures left end away from video pictures right end).
Step 203, calculating caption area width can accommodate the subtitle of much font sizes.Most small character is set by font size first
Numbers No. 18, the width of each character of current font size is then calculated using the method that ObjectC is provided, then calculates current word
Curtain peak width can accommodate how many a characters.If it exceeds 38 most multidisplay, then font size adds 1, is further continued for doing same
Judgement.Font size constantly adds 1 in this way, constantly judges, until current font size reaches maximum value 40, or current font size is current wide
The lower number of characters shown of degree is less than 38.Font size finally obtained so is exactly meeting size range and every row shows and do not surpass
38 words are crossed under the conditions of the two, maximum font size, can't it is excessive or too small because of picture width and cause font size excessive or
It is too small thus influence viewing.
Step 204 after font size has been determined, according to the size of current font size, calculates under current font size, current subtitle content
Width, then calculated Current Content divided by the width in current subtitle region with the width of current subtitle content and need a point several rows.
Then step 205 further according to current font size calculates required for these rows height.Since CATextLayer can only
Its distance of the top away from video pictures bottom of window is set, so this is highly added away from bottom distance (50 pixels), by this
A value is set as the distance of CATextLayer distance from top picture window bottom end.Computed altitude every time in this way, is arrived
CATextLayer top position can guarantee that the distance of CATextLayer distance from bottom picture window bottom end is constant indirectly,
Achieve the effect that the no bottom alignment of CATextLayer itself.
Step 206, finally font size and position all determine after, by text importing to the region CATextLayer set
?.
The above method provided herein can make word according to the size of the width adjustment Subtitle Demonstration of video pictures
The size of curtain is maintained in the range of minimum display font size and maximum display font size defined, avoid since video width is excessive or
It is too small and cause display subtitle it is excessive or too small, influence the normal viewing of user.In addition, scheme provided herein being capable of root
The position CATextLayer is adjusted according to caption content, the control CATextLayer of no bottom alignment is allowed to be provided with bottom pair indirectly
Neat function has achieved the effect that bottom is aligned, and practises so that more meeting user by the Subtitle Demonstration that CATextLayer is realized
It is used, better visual effect is brought to user.
The present embodiment sets 38 for the max number of characters that every row is shown, sets 18 for minimum display font size, will be maximum
Display font size is set as 40, sets 80 pixels away from the distance d1 of video pictures left end for caption display area, subtitle is shown
Show that region is set as 80 pixels, the distance by caption display area away from video pictures bottom end away from the distance d2 of video pictures right end
D3 is set as 50 pixels.These parameters are set as values above by the application, also can guarantee so that no matter how video pictures adjust
Subtitle can normally be shown, meet the viewing demand of user, moreover, subtitle can also be made to remain that bottom is aligned, give user
Bring good visual experience effect.
Certainly, parameters set by the application can optimize adjustment, such as video pictures according to the actual situation
Every row is shown on middle caption display area max number of characters, minimum display font size, maximum display font size, caption display area away from
Distance and caption display area of the distance, caption display area of video pictures left end away from video pictures right end are drawn away from video
Distance of face bottom end etc. can be adaptively adjusted according to user demand or according to video actual displayed effect.
As can be seen from the above embodiments beneficial effect existing for the application is:
First, the method and system provided by the present invention that subtitle is adjusted according to picture can obtain video pictures in real time
Width, and the font size of subtitle and the line number of display can be adjusted in real time according to the width of video pictures so that no matter video pictures
How to change, the font size of subtitle is in always in the range of minimum display font size and maximum display font size, avoid subtitle with
The stretching of picture and become excessive or too small so that the size of subtitle is in preferable font size model with the variation of video pictures always
In enclosing, the experience effect of user is effectively improved while meeting the viewing demand of user.
Second, the method and system provided by the present invention that subtitle is adjusted according to picture can be to caption display area
Position is set, so that position does not exceed certain range when Subtitle Demonstration, but also enables to no matter show several rows
When subtitle, bottom alignment can be realized always, when avoiding display line number has multirow, Subtitle Demonstration is random and chaotic to be showed
As bringing good visual experience effect to user.
It should be understood by those skilled in the art that, embodiments herein can provide as method, apparatus or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
Above description shows and describes several preferred embodiments of the present application, but as previously described, it should be understood that the application
Be not limited to forms disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations,
Modification and environment, and the above teachings or related fields of technology or knowledge can be passed through within that scope of the inventive concept describe herein
It is modified.And changes and modifications made by those skilled in the art do not depart from spirit and scope, then it all should be in this Shen
It please be in the protection scope of appended claims.
Claims (10)
1. a kind of method for adjusting subtitle according to picture, comprising:
Subtitle Demonstration parameter in video pictures is set, and the Subtitle Demonstration parameter includes at least: every row on caption display area
The max number of characters of display, minimum display font size, the maximum display distance of font size, caption display area away from video pictures left end
The distance d3 of distance d2 and caption display area away from video pictures bottom end of d1, caption display area away from video pictures right end；
The width d0 for obtaining video pictures in real time, according to the width d0 of the video pictures, the caption display area away from video
The distance d2 of distance d1 and the caption display area away from video pictures right end of picture left end calculates caption display area
Width d4, d4=d0-d1-d2；
Max number of characters, the minimum display font size and the institute shown according to the width of the caption display area, every row
Maximum display font size is stated, the maximum font size that the caption display area can accommodate is calculated；
The width of the maximum font size and current subtitle display area that can be accommodated according to the caption display area calculates current
The line number shown needed for caption content；
The line number of display needed for the maximum font size that can be accommodated according to the caption display area, the current subtitle content, with
And distance of the caption display area away from video pictures bottom end, the display position of every row subtitle is calculated, so that close to the view
The distance between the first row subtitle bottom of frequency picture bottom end and described video pictures bottom end keep equal with d3；
The line number of display needed for the maximum font size that can be accommodated according to the caption display area, the current subtitle content, with
And the display position of every row subtitle, caption content is shown to the caption display area.
2. the method for adjusting subtitle according to picture according to claim 1, which is characterized in that
The maximum font size that the caption display area can accommodate is calculated, further are as follows:
The minimum display font size is set by font size, the function provided using propertystring class in ObjectC is calculated current
The width of each character under font size；
According to the width of the width of the caption display area and each character, the width of the caption display area is calculated
The number of characters that range can accommodate；
Judge whether the number of characters is more than that font size is added 1, then calculate if being more than by the max number of characters that every row is shown
The number of characters that the width of corresponding character and the width of the caption display area can accommodate, until current font size is in current word
Under the width of curtain display area the number of characters that show of every row be less than or equal to the max number of characters or current font size reach described in most
Big display font size, the font size obtained at this time are that the subtitle is shown under meeting size range and max number of characters that every row show
Show the maximum font size that region can accommodate.
3. the method for adjusting subtitle according to picture according to claim 1, which is characterized in that
The line number shown needed for current subtitle content is calculated, further are as follows:
It according to the size of current font size, calculates under current font size, the overall width of current subtitle content；
With the overall width of the calculated caption content divided by the width of the caption display area, current subtitle content is obtained
The line number of required display.
4. the method for adjusting subtitle according to picture according to claim 1, which is characterized in that
The display position of every row subtitle is calculated, further are as follows:
It according to the size of current font size, calculates under current font size, the height d5 of every row subtitle；
It is described from the distance between the first row subtitle bottom of the close video pictures bottom end and the video pictures bottom end
Distance d3 of the caption display area away from video pictures bottom end, distance of the top of line n subtitle apart from the video pictures bottom end
For d3+n*d5.
5. the method for adjusting subtitle according to picture according to claim 1, which is characterized in that further comprise:
40 are set by the max number of characters that every row is shown, 22 are set by the minimum display font size, by the maximum
Display font size is set as 50,100 pixels is set away from the distance d1 of video pictures left end for the caption display area, by institute
State caption display area away from the distance d2 of video pictures right end be set as 100 pixels, by the caption display area away from video
The distance d3 of picture bottom end is set as 40 pixels.
6. a kind of system for adjusting subtitle according to picture characterized by comprising parameter setting module, caption display area are wide
Computing module, caption display area font size computing module, caption display area line number computing module, captions displaying location is spent to calculate
Module and subtitle insmod,
The parameter setting module, the Subtitle Demonstration parameter for being arranged in video pictures, the Subtitle Demonstration parameter are at least wrapped
It includes: every row is shown on caption display area max number of characters, minimum display font size, maximum display font size, caption display area
Distance d2 away from video pictures right end of distance d1, caption display area away from video pictures left end and caption display area away from
The distance d3 of video pictures bottom end；
The caption display area width computing module is drawn for obtaining the width d0 of video pictures in real time according to the video
Distance d1 and the caption display area of the width d0, the caption display area in face away from video pictures left end are away from video
The distance d2 of picture right end calculates the width d4, d4=d0-d1-d2 of caption display area；
The caption display area font size computing module, for being shown according to width, the every row of the caption display area
Max number of characters, the minimum display font size and the maximum display font size, calculating the caption display area can accommodate
Maximum font size；
The caption display area line number computing module, maximum font size for that can be accommodated according to the caption display area with
And the width of current subtitle display area, calculate the line number shown needed for current subtitle content；
The captions displaying location computing module, it is maximum font size for that can be accommodated according to the caption display area, described
The distance of line number and the caption display area away from video pictures bottom end shown needed for current subtitle content, calculates every row
The display position of subtitle, so that between the first row subtitle bottom and the video pictures bottom end of the video pictures bottom end
Distance keep it is equal with d3；
The subtitle insmods, maximum font size, the current subtitle for that can be accommodated according to the caption display area
The display position of the line number and every row subtitle that show needed for content, is shown to the Subtitle Demonstration area for caption content
Domain.
7. the system for adjusting subtitle according to picture according to claim 6, which is characterized in that
The caption display area font size computing module, is further used for:
The minimum display font size is set by font size, the function provided using propertystring class in ObjectC is calculated current
The width of each character under font size；
According to the width of the width of the caption display area and each character, the width of the caption display area is calculated
The number of characters that range can accommodate；
Judge whether the number of characters is more than that font size is added 1, then calculate if being more than by the max number of characters that every row is shown
The number of characters that the width of corresponding character and the width of the caption display area can accommodate, until current font size is in current word
Under the width of curtain display area the number of characters that show of every row be less than or equal to the max number of characters or current font size reach described in most
Big display font size, the font size obtained at this time are that the subtitle is shown under meeting size range and max number of characters that every row show
Show the maximum font size that region can accommodate.
8. the system for adjusting subtitle according to picture according to claim 6, which is characterized in that
The caption display area line number computing module, is further used for:
It according to the size of current font size, calculates under current font size, the overall width of current subtitle content；
With the overall width of the calculated caption content divided by the width of the caption display area, current subtitle content is obtained
The line number of required display.
9. the system for adjusting subtitle according to picture according to claim 6, which is characterized in that
The captions displaying location computing module, is further used for:
It according to the size of current font size, calculates under current font size, the height d5 of every row subtitle；
It is described from the distance between the first row subtitle bottom of the close video pictures bottom end and the video pictures bottom end
Distance d3 of the caption display area away from video pictures bottom end, distance of the top of line n subtitle apart from the video pictures bottom end
For d3+n*d5.
10. the system for adjusting subtitle according to picture according to claim 6, which is characterized in that
The max number of characters that every row is shown is 40, and the minimum display font size is 22, and the maximum display font size is 50, institute
The d1=100 pixel of distance of caption display area away from video pictures left end is stated, the caption display area is away from the video pictures right side
The d3=40 pixel of distance of d2=100 pixel of distance, the caption display area away from video pictures bottom end at end.
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| CN109284481B (en) * | 2018-09-06 | 2021-11-19 | 郑州云海信息技术有限公司 | Prompt text processing method and device and computer readable storage medium |
| CN110971952B (en) * | 2018-09-29 | 2022-03-15 | 阿里巴巴（中国）有限公司 | Bullet screen display method and device |
| CN109982027A (en) * | 2019-02-26 | 2019-07-05 | 视联动力信息技术股份有限公司 | A kind of method of adjustment, the device and system of Subtitle Demonstration parameter |
| CN110351605B (en) * | 2019-08-15 | 2021-05-25 | 海信电子科技（深圳）有限公司 | Subtitle processing method and device |
| CN110418162B (en) * | 2019-08-20 | 2021-10-22 | 成都索贝数码科技股份有限公司 | Method for simultaneously making short videos with different breadth ratios |
| CN113542903A (en) * | 2021-07-16 | 2021-10-22 | 思享智汇(海南)科技有限责任公司 | Subtitle generating method and device supporting font size self-adaption |
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