To use the libass library, you need to have libass enabled at compile time.

It converts the input subtitle file to an ASS file. The libass library is a portable subtitle renderer for the ASS subtitle format. Adding Subtitles in SRT FormatįFmpeg uses the subtitles filter and the libass library to add SRT subtitles on top of the input video. The subtitles filter is used for adding subtitles in SRT format while the ass filter is used for adding subtitles in ASS format. These two filters are used for different subtitle formats. Adding Hard SubtitlesįFmpeg uses the subtitles and ass filters to hard code subtitles into a video file. Next, we can add the subtitles to the video file using hard coding.

A blank line to indicate the end of the subtitle.

The start and end time of the subtitle in “ hours:minutes:milliseconds” format.

You can use any text editor to add texts to the subtitle file.Įvery SRT file consists of these four components: Preparing an SRT Subtitle Fileįirst, we need to prepare an SRT subtitle file for the video. This gives users more flexibility and more control over how they want to watch the video.įFmpeg allows you to add subtitles to a video using both methods and we are going to do both in this tutorial. They can be enabled and disabled during the video playback. On the other hand, Soft Subtitles are not burned into a video. These subtitles are burned into the video and cannot be removed once you’ve added them. Hard Subtitles are subtitles that are hard coded to a video and can be displayed on any media player as long as the video format is supported. The subtitles on a video can be categorized as Hard Subtitles or Soft Subtitles. In this tutorial, we will be adding subtitles in SRT(.srt) and ASS(.ass) format to the video using FFmpeg. For reference, the version of FFmpeg used in this tutorial is v5.0.1.īesides that, you will also need to prepare a subtitle file for your video. You will need to download FFmpeg to add subtitles to a video.

At the end of this tutorial, you will know how to add Hard Subtitles and Soft Subtitles to a video file. In this tutorial, we are going to use FFmpeg to add subtitles to a video file. The statistics above show that you should definitely add subtitles to your videos.

Even if they keep the video silent, the subtitles can help them to understand the video better. However, 37% of viewers said that they tend to turn the sound on whenever there are subtitles on the video because the video seems more interesting. But with 83% of consumers watching videos with the sound off, the effectiveness of your video content might be limited. Studies show that 81% of marketers feel that video has a direct, positive impact on sales.

Ffmpeg copy closed captions