M2TS to M2TS Converter
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Supports: M2TS
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Need help?How to Convert M2TS to M2TS
- Upload Your M2TS File — Click "Choose Files" or drag and drop your M2TS (Blu-ray/AVCHD) video file. Only .m2ts files are accepted.
- Choose Video Codec — Under Video Codec, the default is H.264. Change to H.265 for better compression or keep H.264 for maximum compatibility.
- 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 is AAC.
- 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 re-encoded M2TS file.
Why Convert M2TS to M2TS?
M2TS (MPEG-2 Transport Stream) is the Blu-ray and AVCHD camcorder format. Converting M2TS to M2TS re-encodes the file, which is useful for compressing large Blu-ray rips to reduce file size while keeping the M2TS container, re-encoding with a more efficient codec (e.g., upgrading from MPEG-2 to H.264), trimming unwanted sections from camcorder recordings, lowering resolution for smaller file sizes (e.g., 1080p → 720p), and normalizing M2TS files from different camcorders into a consistent format.
M2TS Re-encoding Options
| Goal | Recommended Setting |
|---|---|
| Reduce file size by 50% | Target File Size: 50% |
| Upgrade codec | Change Video Codec to H.265 |
| Extract a clip | Set Trim: Start Time + Duration |
| Lower resolution | Video Resolution: 720p |
| Maximum quality | Quality Preset: Highest |
M2TS Format Overview
| Feature | M2TS |
|---|---|
| Full name | MPEG-2 Transport Stream |
| Developed by | Blu-ray Disc Association |
| Video codec | H.264 (default), MPEG-2, H.265 |
| Audio codec | AAC (default), AC3, DTS |
| Use case | Blu-ray discs, AVCHD camcorders |
| Error correction | Built-in (transport stream) |
| File size | Large (Blu-ray quality) |
Why would I convert M2TS to M2TS?
The main use case is re-encoding — compressing large M2TS files to reduce storage, upgrading the video codec for better efficiency, trimming unwanted footage, or lowering resolution. The output stays in the M2TS container format.
Will re-encoding reduce quality?
Yes, some quality loss is inherent when re-encoding. Use Quality Preset "Highest" or Constant Quality (CRF) with a low value to minimize visible degradation. The trade-off is smaller file size.
Can I upgrade from MPEG-2 to H.264?
Yes. Many older Blu-ray rips and AVCHD recordings use MPEG-2 video. Changing the Video Codec to H.264 (the default) produces roughly 50% smaller files at equivalent visual quality.
Can I trim the video during re-encoding?
Yes. Under Trim, select "Time Range" and enter a Start Time and Duration. This extracts a specific segment — useful for removing unwanted footage from camcorder recordings.
What is the difference between M2TS and MTS?
M2TS adds a 4-byte timestamp header to each transport stream packet. MTS is the raw transport stream without this header. Both contain the same video/audio data and are interchangeable in most workflows.