To eliminate distraction or substitute captioning in another language, you must edit the footage file itself. If your FLV file contains subtitles that form part of the pixels that make up the video frames themselves, you can't turn them off in playback software. To alter captions so they present subtitling in another language, embed a new timed-text file into the FLV. To create a version of an FLV-format video or movie that lacks captions altogether, edit a copy of the file to remove the subtitling text or save the edited document under a new filename. Some of these applications can also extract the text of subtitles into a separate file. Video-editing applications can enable you to access and change the embedded subtitling text formats that display captions, timed to match up with the footage they accompany. These preferences only affect the display of text-based subtitling, also known as soft subtitles. Some of these applications include global preferences that determine whether they hide or show captioning in videos and movies that include it.

In some players, you can right-click directly on the video image to bring up a menu from which you can turn off subtitles. The video player software you use to view an FLV file on your computer offers preferences that control the display of captioning information. Once subtitles become part of the video image itself, however, the task of making them disappear becomes more complicated. Text-file-based formats accept multiple options that can enable you to format their appearance - typeface, size, color and position, for example - and to add or replace captions in one language with support for another.

Subtitling comprises two basic forms of captioning: those that rely on timed text incorporated into the video itself as metadata, and those that use text burned directly into the video image.

Remove subtitles from mp4