Convert MTS to SRT

Sonix transcribes your MTS file and exports it as SRT subtitles that you can use with any video platform or editor.

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Timestamped
5-min turnaround
All platforms
MTS conversion guide

Convert MTS to SRT 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 subtitles~2 min

    Fine-tune subtitle timing and text in the editor.

  6. 6
    Export SRT~10 sec

    Download your MTS subtitles as an SRT 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 SRT: frequently asked questions

Can you convert MTS to SRT subtitles?

Yes! Sonix transcribes your MTS file with precise timestamps and exports it as SRT subtitles ready for any video platform.

What is an SRT file?

SRT (SubRip Subtitle) is the most widely supported subtitle format. It works with YouTube, Vimeo, Facebook, and all major video editors.

How accurate are the timestamps?

Sonix generates word-level timestamps accurate to the hundredth of a second, ensuring your subtitles sync perfectly with the audio.

Can I edit the SRT timing?

Yes! Our editor lets you adjust subtitle timing, merge or split captions, and customize character limits per line.

Does it work with YouTube?

Absolutely! Upload your SRT file to YouTube Studio and your subtitles will sync automatically with your video.

Can I set characters per line?

Yes! Customize your SRT with options for max characters per line, lines per caption, and maximum duration.

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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