MTS vs WEBM
A detailed comparison of AVCHD Video and WebM Video — file size, quality, compatibility, and which format to choose for your workflow.
AVCHD Video
Video FilesMTS (AVCHD) is a high-definition video format from Sony and Panasonic camcorders.
About MTS filesWebM Video
Video FilesWebM is an open, royalty-free media format developed by Google. It uses VP8/VP9 video with Vorbis/Opus audio and is natively supported by all major web browsers for HTML5 video.
About WEBM filesStrengths Comparison
MTS Strengths
- Native format for every AVCHD camcorder since 2006.
- H.264 compression — small files for high-def quality.
- Direct compatibility with iMovie, Premiere, Resolve, Final Cut.
- Carries Dolby Digital 5.1 audio on flagship camcorders.
WEBM Strengths
- Patent-free and royalty-free — no licensing worries for encoders.
- First-class HTML5 <video> support across browsers.
- AV1 inside WebM offers best-in-class compression (30-50% smaller than H.264).
- Low overhead — the container strips everything MKV does not need.
- Powered by battle-tested libvpx and dav1d reference decoders.
Limitations
MTS Limitations
- Slow to decode — editors typically transcode for editing.
- Proprietary folder-structure conventions complicate direct import.
- Largely legacy as smartphones replaced dedicated camcorders.
- 192-byte packet format adds overhead vs plain TS.
WEBM Limitations
- Limited codec palette — cannot carry H.264 or HEVC streams.
- Encoding AV1 or VP9 at quality is slow.
- Hardware decoders for AV1 are still catching up on older devices.
- Professional video tools (Final Cut, Premiere) do not export WebM natively.
Technical Specifications
| Specification | MTS | WEBM |
|---|---|---|
| MIME type | video/mp2t | video/webm |
| Extension | .mts | .webm |
| Container | BDAV MPEG-2 Transport Stream (192-byte packets) | Matroska subset |
| Video codecs | H.264 (AVCHD Main/High Profile) | VP8, VP9, AV1 |
| Audio codecs | AC-3 (Dolby Digital), LPCM | Vorbis, Opus |
Typical File Sizes
MTS
- 1 min HD AVCHD (17 Mbps) ~130 MB
- 1 hour AVCHD Full HD ~8 GB
WEBM
- Short web clip (1080p VP9, 1 min) 15-30 MB
- YouTube 1080p AV1 (1 min) 12-20 MB
- Animated sticker (VP9, transparent) 200-800 KB
Ready to convert?
Convert between MTS and WEBM online, free, and without installing anything. Encrypted upload, automatic deletion after 2 hours.
Frequently Asked Questions
MTS (AVCHD Video) is a video container format that bundles one or more video streams, audio tracks, and optional subtitles into a single file. The container format determines how metadata is organised and which codecs can live inside; the visual quality itself depends on the codec (H.264, H.265, VP9, AV1) rather than the MTS wrapper. It is part of the video files family.
WEBM (WebM Video) is a video container format that bundles one or more video streams, audio tracks, and optional subtitles into a single file. The container format determines how metadata is organised and which codecs can live inside; the visual quality itself depends on the codec (H.264, H.265, VP9, AV1) rather than the WEBM wrapper. It is part of the video files family.
VLC, MPV and PotPlayer play nearly every MTS file on desktop. Browser support varies: modern Chromium, Firefox and Safari play common containers via the HTML5 <video> tag, but niche MTS variants may fail. If a device refuses your MTS, convert to MP4 with our MTS to MP4 converter for universal playback.
VLC, MPV and PotPlayer play nearly every WEBM file on desktop. Browser support varies: modern Chromium, Firefox and Safari play common containers via the HTML5 <video> tag, but niche WEBM variants may fail. If a device refuses your WEBM, convert to MP4 with our WEBM to MP4 converter for universal playback.
Upload your MTS to KaijuConverter and pick MP4, MOV, MKV, WebM, or any other target. Our pipeline uses FFmpeg under the hood and stream-copies when codecs are compatible (no quality loss) or transcodes at high-quality defaults otherwise. Conversion runs server-side; both files delete within two hours.
Only when the target requires re-encoding. If the codecs inside MTS match what the target container supports, FFmpeg stream-copies the streams and the output is bit-identical to the source. Transcoding uses transparent quality defaults (CRF 20–23 H.264) and produces output indistinguishable from the original at normal viewing distance.