MP4 to MTS Converter
Initializing... drag & drop files here
Supports: MP4, M4V
Advanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
Reset to defaults
Need help?How to Convert MP4 to MTS
- Upload Your MP4 File — Click "Choose Files" or drag and drop your MP4 or M4V video file. Both extensions are accepted.
- Choose Video Codec — Under Video Codec, the default for MTS output is H.264. Other options include H.265/HEVC, MPEG-2, AV1, and more.
- Set Video Quality — Under File Compression, choose from: Quality Preset (Highest through Lowest), Target File Size % (1-100% slider with Smart Scaling), Specific File Size (MB/KB), Constant Bitrate, Variable Bitrate, Constant Quality (CRF), or Constraint Quality.
- Set Audio Codec — Under Audio Codec, the default for MTS is AAC. AC3 (Dolby Digital) is common for AVCHD workflows.
- Adjust Resolution (Optional) — Under Video Resolution, keep the original or choose Preset Resolutions (1080p, 720p, 480p, etc.), Fixed Resolutions, Resolution Percentage, or custom Width/Height/Width×Height.
- Trim (Optional) — Under Trim, set a Start Time and Duration to extract a specific segment.
- Convert & Download — Click "Convert" and download your MTS file.
Why Convert MP4 to MTS?
MTS (MPEG Transport Stream) is the native recording format for AVCHD camcorders, developed by Sony and Panasonic. It is designed for HD video capture and is the standard format for Blu-ray disc authoring. Converting MP4 to MTS is useful for importing footage into AVCHD-based editing workflows (Sony Vegas, Adobe Premiere), preparing video for Blu-ray disc authoring where MPEG Transport Stream is required, maintaining compatibility with camcorder-based media management software, and broadcasting workflows that require transport stream containers for error correction.
MP4 vs MTS Comparison
| Feature | MP4 | MTS (AVCHD) |
|---|---|---|
| Container | MPEG-4 Part 14 | MPEG Transport Stream |
| Video codec | H.264 (typical) | H.264 (AVCHD standard) |
| Audio codec | AAC (typical) | AC3 / AAC |
| Error correction | None | Built-in (broadcast-grade) |
| Streaming | Progressive download | Broadcast streaming |
| Blu-ray authoring | Requires conversion | Native support |
| Camcorder support | Some | Sony, Panasonic (AVCHD) |
| Best for | General playback | Broadcast, Blu-ray, AVCHD |
Common MTS Use Cases
- Blu-ray authoring — MTS/M2TS is the native format for Blu-ray disc content
- AVCHD workflows — Sony and Panasonic camcorders record in MTS natively
- Broadcasting — Transport stream containers include error correction for reliable transmission
- Professional editing — Some NLE software handles MTS import more efficiently than MP4
What is the difference between MTS and M2TS?
MTS and M2TS are both MPEG Transport Stream containers used in AVCHD. MTS is the raw transport stream, while M2TS adds a 4-byte timestamp header to each packet. Both contain the same video/audio data and are interchangeable in most workflows.
Should I use AC3 or AAC audio for MTS?
For Blu-ray authoring, use AC3 (Dolby Digital) — it is the standard audio codec for Blu-ray discs. For general AVCHD use, AAC (the default) works well and produces smaller files.
Will the file size increase?
MTS files may be slightly larger than MP4 due to transport stream overhead (packet headers, error correction data). The difference is typically 1-5% for the same video quality settings.
Can I trim the video during conversion?
Yes. Under Trim, select "Time Range" and enter a Start Time and Duration in seconds or HH:MM:SS.sss format. This extracts only the specified segment.
What resolution should I use for Blu-ray?
Blu-ray supports 1080p (1920×1080) and 720p (1280×720). Under Video Resolution, choose the 1080p or 720p preset. Use H.264 video codec with AC3 audio for maximum Blu-ray compatibility.