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Burn subtitles

Hard-coded captions: drawn into the picture, so they show everywhere and cannot be turned off.

This one runs on your credits. Hard-coded captions: drawn into the picture, so they show everywhere and cannot be turned off.

Sign in and get 500 free credits every month — enough for many files — then drop the file in the workbench and run burn subtitles there.

Pick a file below to see exactly what it would cost.

Sign in and run it — free credits included

More free conversions, where you upload. The Fylane extension does the same work inside any upload form, on its own free share every day.About the extension

How to burn subtitles

  1. Sign in — 500 free credits a month.
  2. Drop the video and the subtitle file together.
  3. Pick the size; run it and download the MP4.

What happens to your file

libass draws each cue into the frames at its time — white text with a dark outline, at the size and edge you chose — and the picture is written as H.264 with AAC sound in a faststart MP4. Because the words are part of the picture, they show on every player, every social platform and every TV, and cannot be switched off or restyled afterwards.

Either file can be dropped first; the one that reads as subtitles is the subtitles. Auto subtitles makes the SRT from the speech if you have none.

Media processing costs real compute per minute, so it runs against your own credits, the first 500 each month free.

Questions

Burned-in or a subtitle track?

A track can be switched off and restyled; burned-in cannot, and needs no support from the player. For social video and anything shown muted, burned-in.

Which fonts?

A clean sans (DejaVu or Liberation). Styles in an ASS file are honoured where libass can.

Do this in code

curl -X POST https://api.fylane.dev/v1/jobs \
  -H "Authorization: Bearer $FYLANE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "file_id": "<file id>",
    "operation": "video.burn-subtitles",
    "options": {
      "font_size": 28,
      "position": "bottom",
      "file_ids": [
        "<second file id>"
      ]
    }
  }'

The same operation, video.burn-subtitles — An SRT, WebVTT or ASS file rendered into the picture (libass) — hard-coded subtitles every player shows; size and position yours. Upload first with the quickstart; every option is on the operations page. 500 free credits a month, then $5 per thousand.