MTS to MP4 Converter
Convert MTS and M2TS (AVCHD) videos from Sony, Panasonic and Canon camcorders to MP4 that plays on any phone, computer or TV — instantly with no quality loss, or re-encoded with automatic deinterlacing and full control over quality, bitrate, frame rate, resolution and audio.
Also: MKV to MP4 converter · AVI to MP4 converter · MOV to MP4 converter · WebM to MP4 converter · FLV to MP4 converter · TS to MP4 converter · WMV to MP4 converter · MPEG to MP4 converter · 3GP to MP4 converter · M4V to MP4 converter · MOD to MP4 converter · VOB to MP4 converter · OGV to MP4 converter · RM/RMVB to MP4 converter · MXF to MP4 converter · MP4 compressor · Video to MP3 extractor · MP4 to GIF converter · Video format converter
Click to choose a video, or drag and drop
Choose an MTS or M2TS file — MKV, AVI, MOV, WebM, TS and most other formats are accepted too. Stays on your device.
Your video is converted entirely in your browser and is never uploaded. The converter engine (ffmpeg, ~32 MB) is downloaded once and cached by your browser.
Frequently asked questions
What is an MTS or M2TS file?
MTS and M2TS are the AVCHD format used by many Sony, Panasonic and Canon HD camcorders and by Blu-ray discs. The video is H.264 (often 1080i interlaced) with Dolby Digital or uncompressed audio, packed in a transport stream. The files sit in a folder such as PRIVATE/AVCHD/BDMV/STREAM on the memory card. Many phones, browsers and editors will not open them directly.
Should I use Fast remux or re-encode?
Fast remux takes seconds and loses no quality, because AVCHD video is already H.264. The downside is that the file stays large and interlaced. Re-encode if you want a smaller file or progressive video, but it runs on one CPU thread in your browser, so a 1080 clip can take several times its length. For a long recording, remux in the browser, or run the generated ffmpeg command on your own computer for a fast re-encode.
My camcorder file is several gigabytes — will it work?
The finished MP4 has to fit in browser memory, which is roughly 1–2 GB. AVCHD recordings are large and long ones are split into pieces of up to 4 GB. Use the Start and End boxes to convert part of a clip, or join the pieces first (on Windows: copy /b 00001.MTS+00002.MTS joined.mts) and run the copied ffmpeg command on your own computer.
Why does the video look striped or combed on motion?
1080i camcorder video is interlaced: each frame is stored as two alternating fields. Deinterlace merges them into clean frames. It is switched on automatically when the tool detects interlaced video and you re-encode; a straight copy leaves the video interlaced.
Is my video uploaded anywhere?
No. The conversion runs entirely in your browser using ffmpeg compiled to WebAssembly. Your video never leaves your device. Only the converter engine itself (about 32 MB) is downloaded, once, and cached by your browser.
What is Fast remux and when should I use it?
A MTS file is just a container. If the video inside is H.264 (or another format MP4 supports) and the audio is AAC, MP3 or AC-3, those streams can be moved into an MP4 container as they are. That takes seconds and loses no quality at all. The tool checks your file and picks this automatically when it is possible.
What do CRF and bitrate mean?
CRF (constant quality) lets the encoder spend as many bits as each scene needs: lower numbers mean better quality and bigger files, around 18 looks near-lossless, 23 is the default and 28 is noticeably smaller. A target bitrate instead aims for a fixed number of kilobits per second, which gives a predictable file size but variable quality.
Why is re-encoding slow, and is there a size limit?
Re-encoding runs on a single CPU thread inside the browser (H.264 only), so it is usually near real-time speed or slower for HD. The finished MP4 also has to fit in browser memory, which in practice limits output to roughly 1 to 2 GB. For a long movie, use Fast remux, trim it, or copy the generated command and run it with ffmpeg on your own computer.
What happens to subtitles?
MP4 supports text subtitles only. SRT, ASS/SSA and WebVTT tracks are converted to the MP4 text format, and you can also save a track as a separate .srt file. Picture-based subtitles from Blu-ray or DVD (PGS, VobSub) cannot be converted.