MTS to WebM (VP9) - Online Video Converter
Convert MTS to WebM (VP9) online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About MTS to WebM (VP9)
MTS is the AVCHD camcorder wrapper for H.264 video on flash media, with takes split near 4 GB spans. WebM re-encodes the picture to VP9 with Opus audio for open web playback. Join spans first to keep scene order and audio sync, since each span converts separately otherwise. Interlaced field recordings need deinterlacing for progressive screens, so confirm the field order before export. High-bitrate originals take a while to re-encode; verify duration after conversion.
Why convert MTS to WebM (VP9)?
- Smaller files with WebM lossy compression.
- Keep animation and transparency where supported.
- Private, no upload - runs in your browser.
MTS vs WebM (VP9)
| Animation | Yes | Yes |
|---|---|---|
| Transparency | No | Yes |
| Compression | lossy | lossy |
| Typical use | MTS is the AVCHD camcorder wrapper for H.264 on flash media. | WebM pairs VP9 video with Opus audio and supports an alpha channel. |
When not to convert MTS to WebM (VP9)
- Skip WebM for archival masters: lossy compression discards detail, so keep the MTS original.
- Keep a master copy: repeated exports stack small losses, so archive MTS before batch WebM shares.
Limits
Starting point: MTS - MTS is the AVCHD camcorder wrapper for H.264 on flash media. Spanned clips split at 4 GB; join them before converting. Apple editors accept it unevenly; keep MP4 for editing round-trips. Encode WebM (VP9 / Opus) from MTS at a bitrate near the source, and confirm the audio track before converting.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.