Add your MTS file
Drop one or more .mts files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
MTS to MPEG
Pulling the soundtrack out of a .mts video into .mpeg audio keeps what you can hear and drops the picture entirely. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop MTS 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.About converting AVCHD video to MPEG video
Pulling the soundtrack out of a .mts video into .mpeg audio keeps what you can hear and drops the picture entirely. An .mts file is AVCHD footage as written to a camcorder's memory card, containing H.264 video inside an MPEG transport stream. Sony and Panasonic camcorders from the late 2000s onward filled SD cards with .mts clips, so the extension is familiar to anyone importing family or event video.
An .mpeg file holds an MPEG program stream: video and audio multiplexed together using the original MPEG-1 or MPEG-2 standards. These files come from Video CDs, DVD-authoring workflows, and older capture hardware, and they remain readable by virtually every conversion tool. For this route the practical draw is universally decodable, with all underlying patents expired and simple, robust structure that tools have parsed for thirty years — balanced against mPEG-1 and MPEG-2 need roughly twice the bitrate of H.264 for comparable quality, which is worth knowing before you commit a large batch.
Why convert MTS to MPEG?
The usual reason to take .mpeg audio out of a .mts file is that only the sound matters — a talk, interview, song, or podcast segment. Keeping the video stream would waste storage, and a dedicated audio file is easier to trim, tag, and play. On the source side, transport-stream packet overhead makes files larger than the same video in MP4; on the target side, the payoff is universally decodable, with all underlying patents expired, which is exactly what you want for handling digitized VHS or Video CD content.
MTS vs MPEG at a glance
| Aspect | AVCHD video (.mts) | MPEG video (.mpeg) |
|---|---|---|
| Format type | Container — quality depends on the codecs and settings inside | Container — quality depends on the codecs and settings inside |
| How it stores data | uses 192-byte transport packets, standard 188-byte packets plus a 4-byte arrival timestamp, matching Blu-ray's BDAV layout | program streams were engineered for reliable storage media, in contrast to the error-hardened transport stream used for broadcast |
| Strongest at | importing camcorder footage into Premiere, Resolve, or Final Cut | handling digitized VHS or Video CD content |
| Weak spot | transport-stream packet overhead makes files larger than the same video in MP4 | mPEG-1 and MPEG-2 need roughly twice the bitrate of H.264 for comparable quality |
| Metadata | recording date, camera settings, and GPS coordinates on some models are stored in the AVCHD folder's clip-info files rather than in the .mts stream itself | the program stream carries essentially no descriptive metadata; the specification predates any notion of embedded titles or tags |
Pick MPEG as the output
Select .mpeg in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if MPEG is selectable, the route is real and validated.
Convert on your device
Press Convert. A WebAssembly FFmpeg build demuxes the audio track and re-encodes it locally; the video stream is simply discarded.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid MPEG file. Outputs keep the original filename with the .mpeg extension.
MTS to MPEG questions, answered
Will converting MTS to MPEG lose quality?
Since mts is container-oriented and mpeg is container-oriented, the conversion preserves the source content exactly as stored; no additional compression pass is applied beyond what .mpeg itself requires.
Is it private to convert MTS files here?
Yes — the .mts file is processed inside your browser tab and never uploaded. A WebAssembly FFmpeg build demuxes the audio track and re-encodes it locally; the video stream is simply discarded. Close the tab and the file is gone from memory.
Where will the MPEG file work?
Desktop players on every operating system decode MPEG-1 and MPEG-2 program streams, and no licensing barriers remain. Browsers never adopted the format for the HTML5 video element, so web delivery requires conversion first.
Will the MPEG file be bigger or smaller than my MTS?
Much smaller — the video stream is usually 80–95% of a .mts file's weight, and it is discarded entirely. The remaining audio is re-encoded at the bitrate implied by your quality setting.
What happens to the metadata in my MTS file?
This converter strips container metadata deliberately (the FFmpeg command runs with metadata mapping disabled) so exported files do not leak recording details. In the source, recording date, camera settings, and GPS coordinates on some models are stored in the AVCHD folder's clip-info files rather than in the .mts stream itself; none of it is transmitted anywhere because the file never leaves your browser.
Can I convert MPEG back to MTS?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .mts → .mpeg → .mts is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.