Subtitles and Caption Subtitle File Formats and Standards

Question 1

What does the file extension '.srt' stand for in subtitle files?

Accepted Answer

SubRip Text

Answer

SRT stands for SubRip Text, a simple and widely supported subtitle file format that stores timecodes and plain text in a sequential numbered format.

Question 2

Which subtitle file format is the web standard used by HTML5 video and most online streaming platforms?

Accepted Answer

WebVTT (.vtt)

Answer

WebVTT (Web Video Text Tracks) is the HTML5 standard subtitle format, natively supported by most modern browsers and streaming platforms.

Question 3

What subtitle format is commonly required by Netflix for professional content delivery?

Accepted Answer

TTML/IMSC (Timed Text Markup Language)

Answer

Netflix requires TTML/IMSC (also called DFXP) for professional content delivery because it supports precise formatting, positioning, and styling metadata.

Question 4

What is the file format used for closed captions in US broadcast television (ATSC digital TV)?

Accepted Answer

CEA-708 embedded in the video stream

Answer

CEA-708 caption data is embedded directly within the video stream's user data area for US digital broadcast television, not stored as a separate file.

Question 5

What is the SMPTE-TT format used for in subtitle standards?

Accepted Answer

A timed text format for professional broadcast and cinema applications

Answer

SMPTE-TT (Society of Motion Picture and Television Engineers Timed Text) is an XML-based format for professional broadcast, cinema, and archive subtitle delivery.

Subtitles and Caption Practice Test

Subtitles and Caption Practice Test

Subtitles and Caption Subtitle File Formats and Standards