tekstitystasoja

Tekstitystasoja are subtitle tracks used in video and multimedia content to render spoken dialogue as text on screen. The Finnish term tekstitystasoja refers to such tracks and can include translations, transcriptions, or descriptive text for accessibility. Tracks can be embedded within a media file or supplied as separate files or streams, allowing users to switch languages or turn captions on and off without altering the video itself.

Common formats include SubRip (SRT), WebVTT, SubStation Alpha (ASS/SSA), and TTML. Media containers such as MKV and MP4 can hold multiple subtitle tracks; some platforms also rely on streaming formats that deliver subtitles as sidecar files or in-band streams. Open subtitles (burned-in) differ from closed subtitles (selectable by the user), a distinction that matters for distribution and accessibility. Subtitles typically rely on time-stamped text synchronized to the audio, with optional styling, positioning, and font choices. They may be plain dialogue subtitles or SDH/CC (sound‑described or closed captions) for accessibility.

Automatic generation and machine translation are common but vary in accuracy, and manual correction is often needed for high quality. Usage and standards have evolved with media delivery: WebVTT has become widespread on the web, while TTML/EBU-TT-D is used in broadcast environments. Modern players usually support multiple tracks, language tagging, and accessibility features, making tekstitystasoja central to multilingual media delivery and equal access to video content.