Convert MTS to VTT

Sonix transcribes your MTS file and exports it as WebVTT captions perfect for HTML5 video and web platforms.

Free to start — no credit card required.See pricing

HTML5 ready
5-min turnaround
Web compatible
MTS conversion guide

Convert MTS to VTT in 6 steps

  1. 1
    Create account~30 sec

    Sign up for a free Sonix trial with 30 free minutes.

  2. 2
    Upload file~1 min

    Upload your MTS file from your computer or cloud storage.

    44+ formats supported
  3. 3
    Select language~10 sec

    Select the language spoken in your file.

    54+ languages
  4. 4
    Auto-transcribe~5 min

    Sonix AI transcribes and timestamps your MTS audio.

  5. 5
    Edit captions~2 min

    Fine-tune caption timing and text in the editor.

  6. 6
    Export VTT~10 sec

    Download your MTS captions as a WebVTT file.

    30+ export formats
The MTS file format

Understanding MTS files

What is a MTS file?

HD camcorder video format (AVCHD)

MTS files are also Advanced Video Codec High Definition (AVCHD) video files that contain high definition MPEG videos that have been captured by certain models of video camcorders. Originally designed by Sony and Panasonic for their High Definition camcorders, JVC, Sanyo, and Canon camcorders also now record audio and video in the MTS file format. Typically MTS videos have high definition streams and support both 720p and 1080i HD videos.

Common uses for MTS files

  • HD camcorder recordings
  • Consumer video production
  • Event videography
  • Sony camcorders
  • Panasonic camcorders
  • Canon camcorders
  • JVC camcorders

Who works with MTS files?

Documentary filmmakers, local news crews, and families digitizing home videos often have large archives of MTS footage from AVCHD camcorders that were common between roughly 2008 and 2015. Video editors also encounter MTS files when ingesting camcorder SD cards into tools like Adobe Premiere Pro or Final Cut Pro, where the files sit inside the AVCHD folder structure.

MTS vs MP4: which should you use?

MTS wraps H.264 video in an MPEG-2 transport stream, a structure designed for in-camera recording and broadcast-style error resilience, while MP4 uses the MPEG-4 Part 14 container with much broader software and device support. Because both formats commonly carry H.264 video, MTS footage can often be remuxed to MP4 without re-encoding or quality loss. MTS is what you get straight off an AVCHD camcorder; MP4 is the better choice for editing, sharing, and playback on modern devices.

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MTS conversion FAQ

MTS to VTT: frequently asked questions

Can you convert MTS to VTT captions?

Yes! Sonix transcribes your MTS file with precise timestamps and exports it as WebVTT captions for web video.

What is a VTT file?

WebVTT (Web Video Text Tracks) is the native caption format for HTML5 video. It's supported by all modern browsers and video platforms.

VTT vs SRT - which should I use?

Use VTT for web video (HTML5) and SRT for video editors. VTT supports advanced styling like colors and positioning.

Does VTT support styling?

Yes! VTT supports CSS styling for colors, fonts, positioning, and more. Customize how your captions appear on screen.

Is VTT compatible with browsers?

VTT is supported by Chrome, Firefox, Safari, Edge, and all modern browsers. It's the web standard for video captions.

Can I use VTT with video.js?

Absolutely! VTT works seamlessly with video.js, Plyr, JW Player, and other HTML5 video players.

Why won't my MTS file play on my computer?

MTS files use the AVCHD transport-stream structure, which some default media players do not support, and clips copied out of the camcorder's AVCHD folder can lose playback context. Opening the file in VLC or remuxing it to MP4 usually resolves the issue.

Do I need to convert MTS to MP4 before transcribing?

No. You can upload the MTS file directly, and its audio track is extracted and transcribed the same way as an MP4 upload.

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