Open captions remain visible as part of the delivered picture or presentation and do not depend on the viewer enabling a caption track. A common implementation burns the text into the video pixels before distribution. This makes the wording appear wherever that video plays, but usually prevents independent changes to its size, styling or language. Open captions can provide access in environments without reliable caption controls. They still need accurate wording, readable placement and useful timing; permanent visibility alone does not establish that they are complete or accessible.
Text becomes part of the image
When captions are burned in, the decoder treats their edges and letters as picture detail. Scaling, compression, cropping and poor video quality can therefore make them harder to read. A player cannot normally restyle those letters as it would a separate text cue. Enlarging the whole video may enlarge the words while also cropping useful content or other captions.
Always visible differs from forced
A forced subtitle track may be automatically selected for particular dialogue yet still exist separately from the video. Open captions are intrinsic to the delivered visual presentation. The distinction matters when text cannot be removed: a caption preference cannot erase burned-in pixels. A player may also display a selectable track over open text, producing two overlapping sets of captions.
Check the available version
Turn off selectable captions briefly to determine whether the visible text remains. If it does, inspect whether the service offers another video version rather than repeatedly changing subtitle settings. For readability, avoid overscan or cropping that cuts the lower edge. If duplicate text appears, disable the unnecessary separate track while retaining whichever presentation meets the viewer’s needs.
An illustrative example
A short instructional video shows captions even with the player’s text tracks disabled. The letters soften when the video is reduced to a low resolution because they are encoded into the picture. A subtitle size slider has no effect; a different source version would be needed for independently adjustable text.
Practical actions
- Disable selectable tracks briefly to identify burned-in text.
- Check for duplicate open and selectable captions.
- Avoid picture cropping that cuts caption lines.