But automatic captions might misrepresent the spoken content due to mispronunciations, accents, dialects, or background noise. YouTube is constantly improving its speech recognition technology. Processing time depends on the complexity of the video's audio. Automatic captions may not be ready at the time that you upload a video. If automatic captions are available, they'll automatically be published on the video. We encourage creators to add professional captions first. If there are multiple language audio tracks on a video, the automatic captions will be in the default language.

The “Reset” option immediately sets all these settings to default.Automatic captions are available in Arabic, Dutch, English, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Romanian, Russian, Spanish, Thai, Turkish, Ukrainian, and Vietnamese.

“Font opacity” measures the visibility of the letters.

You can choose between “Drop Shadow,” “Raised,” ”Depressed,” and “Outline.” The Raised and Depressed options add shadows to the bottom and top of the letters, respectively.

The “Character edge style” option allows you to choose some additional style options for your subtitles.

It’s disabled by default, which is why you might not have heard of it.

“Window opacity” defines the opacity of this same area.

“Window color” sets the color of the rectangular area which is the biggest allowed area for the letters to take at a time.

You can also remove the background by setting the opacity to 0%.

“Background opacity” defines the opacity of this same area.

The “Background color” sets the color of the area surrounding the letters.

You can also increase and decrease the font size by pressing the + and – keys. The smallest possible size is 50% of the default size, while the biggest is 400%.

“Font size” changes the letters’ size.

The same options are available for all the other color settings. Besides the default white, you get to choose between red, green, blue, cyan, magenta, yellow, and black.

“Font color” changes the color of the letters.

Here’s where you can choose between serif, sans serif, and cursive fonts, among others. Instead of font names, you only get to see the font styles.

“Font family” changes the subtitle font.

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