如何获取系统的隐藏字幕字体大小? [英] How to get system's closed caption font size?

问题描述

我想获取系统的隐藏字幕字体样式，参考了

解决方案

枚举不给出具体值，而是给出一个百分比.显然你也注意到了这一点.

百分比取决于参考值.一般来说，UWP 最常见的默认字体大小是 14，但在 MediaTransportControls 中，默认字体大小通常是 12.

所以 Windows.Media.ClosedCaptioning.ClosedCaptionSize.OneHundredFiftyPercent 应该是 12*1.5=18.

<小时>

更新

抱歉，我需要进一步说明 CC 的字体大小.

CC的大小受多种因素影响:

1.字幕文件本身的设置.

例如，SRT 文件支持字体设置.{\fs25} 表示一行字幕，FontSize 为 25，Foreground 为红色.

2.受当前窗口大小的影响

显示字幕的控件集成在TimedTextSourcePresenter(MediaPlayerElement 内的网格)中.对于TimedTextSourcePresenter，您可以将其视为一个ViewBox.它将根据当前控件的大小缩放内部元素.

总而言之，MediaPlayerElement 中的 Closed Caption 有一个基本字体大小，但这个字体大小不一定等于最终呈现的字体大小.

谢谢.

I want to get system's closed caption font style, and I referd doc. So far everything is good, except the font size.

According to doc, ClosedCaptionProperties.FontSize returns enum ClosedCaptionSize, see code

        switch (Windows.Media.ClosedCaptioning.ClosedCaptionProperties.FontSize)
        {
            case Windows.Media.ClosedCaptioning.ClosedCaptionSize.FiftyPercent:
                richtextblock.FontSize = 50;
                break;
            case Windows.Media.ClosedCaptioning.ClosedCaptionSize.OneHundredPercent:
                richtextblock.FontSize = 100;
                break;
            case Windows.Media.ClosedCaptioning.ClosedCaptionSize.OneHundredFiftyPercent:
                richtextblock.FontSize = 150;
                break;
            case Windows.Media.ClosedCaptioning.ClosedCaptionSize.TwoHundredPercent:
                richtextblock.FontSize = 200;
                break;
            default:
                richtextblock.FontSize = 100;
                break;
        }

I set FontSize to the corresponding number, although I know it's a percentage.

The final reslut is different from system.

So what's the exact FontSize of these enums???

解决方案

The enumeration does not give a specific value, but a percentage. Obviously you also noticed this.

The percentage depends on a reference value. Generally speaking, the most common default font size of UWP is 14, but in MediaTransportControls, the default font size is usually 12.

So Windows.Media.ClosedCaptioning.ClosedCaptionSize.OneHundredFiftyPercent should be 12*1.5=18.

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Update

Sorry, I need to explain further about the font size of the CC.

The size of CC is affected by many factors:

1. The settings of the subtitle file itself.

For example, SRT file support font setting. <font color="red">{\fs25} means a line of subtitles with a FontSize of 25 and a Foreground of red.

2. Affected by the size of the current window

The controls for displaying subtitles are integrated in TimedTextSourcePresenter (a Grid inside MediaPlayerElement). For TimedTextSourcePresenter, you can think of it as a ViewBox. It will scale the internal elements according to the size of the current control.

In summary, the Closed Caption in MediaPlayerElement has a base font size, but this font size is not necessarily equal to the font size finally rendered.

Thanks.

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