How to add subtitles to video AI

Adding subtitles to videos not only enhances the viewing experience, but also helps viewers better understand the video content. The demand for AI subtitles is increasing day by day, and this article will detail how to add subtitles to video AI, covering the entire process from preparation to release.

First, choosing the right software is crucial. There are many excellent subtitle editing tools on the market, such as Aegisub, which is a free and open source subtitle production software that supports multiple subtitle formats and provides rich functions. Visit Aegisub's official website https://www.aegisub.org/ to download the latest version. After the installation is complete, open the software and import the video files to which you want to add subtitles. Aegisub's operation interface is intuitive and easy to understand, with a video preview on the left and a subtitle text editing area on the right. Subtitles can be easily created by playing the video and marking the points at which the subtitles appear. In addition, Aegisub also supports direct input of timestamps for quick editing.

In the subtitle text editing area, users can directly enter or paste subtitle text. In order to improve accuracy, it is recommended to use speech recognition software to automatically generate subtitle text, and then proofread and adjust it through Aegisub. The Cloud Speech-to-Text API provided by Google is a good choice. Through the API, the speech in the video can be automatically converted into text. Visit https://cloud.google.com/speech-to-text to get detailed documentation and get started. First, register a Google Cloud account and enable the Speech-to-Text service. Then, set up the project according to the documentation instructions, obtain the API key, and write code to call the API to process the video and audio streams. Finally, the generated text is imported into Aegisub for fine-tuning to ensure that the subtitles are fully synchronized with the video content.

After you finish editing the subtitles, export the subtitles file. Aegisub supports multiple formats, such as SRT, ASS, etc., among which SRT is the most commonly used one. When saving the subtitle file, choose the SRT format, which will make it easier to load the subtitles in most players. Next, merge the generated subtitle file with the original video file. It is recommended to use FFmpeg, a powerful multimedia processing tool, which can seamlessly integrate subtitles into videos. Visit FFmpeg’s official website https://ffmpeg.org/ to download the installation package and install it. After the installation is complete, open a command prompt or terminal and enter the following command:

`

ffmpeg -i input_video.mp4 -vf "subtitles=subtitle_file.srt" output_video.mp4

`

This command means to add a subtitle file named subtitle_file.srt to the video file named input_video.mp4, and the final output is output_video.mp4. After running the command, wait for the processing to complete to get the video file with subtitles.

Finally, to ensure subtitle quality, it is recommended to invite friends or colleagues to watch the video with subtitles, collect feedback, and make necessary modifications based on the feedback. In addition, you can also use online subtitle checking tools such as Amara (https://amara.org/) to check the subtitle accuracy. Amara provides an easy-to-use platform where users can upload subtitle files and the system will automatically detect errors and provide correction suggestions.

In short, adding subtitles to videos is a meticulous job, but through proper use of software tools and process optimization, efficiency and accuracy can be greatly improved. I hope the methods and techniques provided in this article can help you successfully complete the work of adding video subtitles.