Question 1

How does the converter handle drop-frame timecodes?

Accepted Answer

It calculates true drop-frame intervals for 29.97 DF and 59.94 DF, omitting frame numbers at minute boundaries (except every tenth minute) to match broadcast timecode.

Question 2

How are TTML styles converted to WebVTT?

Accepted Answer

TTML styling attributes like colors and font families are mapped into WebVTT ::cue CSS blocks, and cue text is wrapped in matching class spans.

Question 3

What is verified during IMSC 1.0.1 checks?

Accepted Answer

The validator checks profile declarations, frame-rate definitions, aspect ratio parameters, permitted style attributes, and per-cue chronological consistency.

Question 4

Which subtitle formats are supported?

Accepted Answer

The tool supports bidirectional conversion among SRT, WebVTT, TTML (SMPTE and clock time), and YouTube SBV formats.

Question 5

Can I upload subtitle files directly?

Accepted Answer

Yes, you can upload .srt, .vtt, .ttml, or plain text files up to 5 MB or paste subtitle text into the input field.

WebVTT · TTML · SBV · SRT Subtitle Converter

What this tool helps you do