Fact · Transcription
FFmpeg's subtitles filter draws subtitles onto the frames of a video.
Checked against its source on October 17, 2026
In the source's own words
“Draw subtitles on top of input video using the libass library”
FFmpeg Filters Documentation, FFmpeg project, 2026, 11.248 subtitles.
Open the original- What it measures
- This is how a caption file becomes open captions: the text is part of the picture file and cannot be turned off by the viewer.
- What it does not show
- The filter needs FFmpeg built with libass. Burned-in captions cannot be removed later without re-editing the video.