Burn Subtitles into Course or Training Videos — No Upload
Some LMS players and embedded video systems ignore soft subtitle tracks. Burned-in captions make training content readable anywhere, especially for sound-off review.
Step-by-step
Prepare SRT, VTT, or ASS
Use SRT/VTT for simple captions. Use ASS if you need branded colors, outlines, or precise placement.
Burn subtitles locally
Drop in the video and subtitle file. Choose size and placement, then export an MP4 with captions drawn into the pixels.
Compress for LMS upload
If your LMS has a file-size cap, compress the captioned output after burning subtitles.
Recommended settings
| Subtitle inputs | SRT, VTT, ASS/SSA |
|---|---|
| Best output | MP4 H.264 + AAC |
| Typical caption size | 32-44 px for 1080p course videos |
Quality check before publishing
- Play the first and last three seconds to catch bad trims, black frames, missing audio, or a visible jump at the end.
- Confirm the exported file matches the important settings above, especially duration, aspect ratio, resolution, codec, and file size.
- Preview once on the target platform or device before deleting the original source file.
- If the clip will be reposted publicly, strip metadata first and verify no private names, GPS data, or device fingerprints remain.
Tools you may also need
FAQ
Can students turn off burned captions?
No. That is the point: burned captions remain visible in any player and after download or re-upload.
Should I keep the subtitle file?
Yes. Keep the original SRT/VTT/ASS for edits and accessibility workflows even after exporting the hardsubbed video.
Does this run in my browser?
Yes — every step in this guide uses an in-browser FFmpeg WebAssembly tool. Your video never uploads to a server and never leaves your device.