.TTXT File Extension
File TypeMPEG-4 Timed Text Subtitles File
What is a TTXT file?
Movie subtitles file created in the MPEG-4 Timed Text (TTXT) format, which is used for MPEG-4 and 3GP videos and mobile phone movies; uses an XML format and supports textual positioning and styles as well as timing precisions of 1 millisecond.
Timed Text subtitles are often mixed within the video file instead of being delivered as a separate ".ttxt" file.