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Burn subtitles into a video with Avidemux, free

Updated 9 November 2026 · by Szymon at szy.monster

Avidemux is a small free video tool for quick cuts and conversions. It's not a full editor, but its subtitle filter burns an SRT file into the picture. That's handy when you just want a captioned copy of a video.

1. Make the SRT

Open AutoSubtitler, drop in your video and press Make subtitles. Download the .srt. Nothing is uploaded.

2. Open the video in Avidemux

Open the video with File › Open. If you want to trim it, do it after making the subtitles from the trimmed file, or the times will be shifted.

3. Add the subtitle filter

1. Set Video Output (on the left) to an encoder such as Mpeg4 AVC (x264). Filters don't work in Copy mode, because the picture has to be re-encoded to draw the subtitles.
2. Click Filters under Video Output.
3. In the Subtitles group, add the SSA/ASS/SRT subtitle filter and pick your .srt file.
4. Use the preview to check the subtitles show and are in sync.

4. Save

Pick an output format (MP4 Muxer is a safe choice), set Audio Output to Copy, and choose File › Save. The new file has the subtitles burned in.

Tips

• Avidemux uses a plain subtitle style. For styled captions, use an editor like Shotcut or DaVinci Resolve.
• If accented letters look wrong, make sure the .srt is UTF-8. AutoSubtitler always saves it that way.

Similar tool: HandBrake.