File Format

We prefer SubRip (.srt) format in plain UTF-8. We recommend using a text editor such as TextWrangler to open and re-save your .srt files in UTF-8.

Scenarist Closed Captions (.scc) is also accepted. A frame rate must be selected for SCC files. Learn more about SCC.

For other file formats, you can use the below apps or web apps to convert to SubRip.

Additional Requirements

  • All text tracks should be complete and accurate, and should stay in sync with the video at all time.
  • Punctuation is important.
  • Avoid long lines. Each line should contain less than 50 characters, and a maximum of one line break. 
  • Avoid formatting tags.

We recommend performing an eyeball test by playing back your video in our system with the text track enabled and jumping to a few random spots.

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