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Video format

M2TS converter

An .m2ts file is a BDAV transport stream, the container Blu-ray discs and AVCHD software use for high-definition video. Open a Blu-ray's BDMV/STREAM folder and every title is an .m2ts file pairing H.264, VC-1, or HEVC video with multichannel audio.

Private for supported formats — processed in your browser

Convert supported files

Runs on your device

Drop M2TS files here

Batch files can each use a different output. Nothing uploads for local conversions.

Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.

Where M2TS comes from

The Blu-ray Disc Association defined the BDAV container for the format's 2006 commercial launch, extending the broadcast MPEG transport stream with a four-byte timestamp on every packet. Ultra HD Blu-ray kept the same container in 2016 while upgrading the contents to HEVC with HDR10.

How M2TS works

  • 192-byte packets whose arrival timestamps enable the precise buffer control disc players require
  • Video codecs are MPEG-2, H.264, or VC-1 on standard Blu-ray, and HEVC on Ultra HD discs
  • Audio options span Dolby TrueHD, DTS-HD Master Audio, AC-3, DTS, and LPCM
  • Video bitrates reach 40 Mbps on Blu-ray and around 100 Mbps on Ultra HD
  • Subtitles use the PGS bitmap format rather than text

When to use M2TS

  • Archiving personal Blu-ray projects and camcorder discs
  • Converting disc rips into MKV while preserving lossless audio
  • Extracting TrueHD or DTS-HD tracks for a music server
  • Consolidating AVCHD camcorder projects that used the extension

Strengths and limitations

Strengths

  • Preserves full disc quality, including lossless audio tracks
  • Seekable and damage-tolerant like every transport stream
  • Well supported by ffmpeg-based conversion tools

Limitations

  • File sizes are very large, often tens of gigabytes per title
  • Commercial discs carry AACS encryption that blocks direct conversion
  • Little support outside desktop software

Compatibility

Desktop players such as VLC and MPC-HC play .m2ts smoothly and editing software imports it, but no browser or mobile OS supports the container. Converting to MKV keeps every track, while converting to MP4 favors device compatibility.

Chapter and playlist information lives in separate CLPI and MPLS files on the disc, not inside the .m2ts stream.

Convert M2TS to another format

Convert other formats to M2TS