Convert MPEG-2 Transport Stream (.m2ts) to Audio Video Interleave (.avi) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .m2ts file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .avi file when it's ready.
M2TS from Blu-ray discs and AVCHD cameras contains H.264/H.265 video with AC3/DTS/LPCM audio in an MPEG-2 Transport Stream wrapper. AVI (Audio Video Interleave) is Microsoft's venerable multimedia container from 1992, using a RIFF-based interleaved structure. Converting M2TS to AVI brings high-definition content into the most widely recognized video format in legacy computing — still required by many older editing tools, hardware players, and industrial systems.
AVI is the input format of choice for legacy video workflows: older versions of Adobe Premiere (pre-CS5), VirtualDub for frame-serving and filtering, some hardware DVD players with USB ports, industrial display systems, and surveillance DVR platforms. Many scientific and medical imaging applications also require AVI input. Converting M2TS to AVI ensures your HD camcorder or Blu-ray content works in these established systems.
FFmpeg demuxes the M2TS, extracts video and audio, then re-encodes for the AVI container. Video is typically encoded as MPEG-4 ASP (Xvid/DivX compatible) for maximum legacy compatibility, or H.264 for modern AVI players. Audio is transcoded from AC3/DTS to MP3 at 192-320 kbps or PCM for lossless editing. The AVI container uses OpenDML (AVI 2.0) extensions for files exceeding the original 2 GB limit, which is common when converting HD content.
With H.264 video in AVI at matched bitrate, quality is nearly identical to the M2TS source. With Xvid/MPEG-4 ASP, expect slightly lower efficiency — increase bitrate by 20-30% to match H.264 visual quality. For editing workflows using Motion JPEG in AVI, per-frame quality is excellent but file sizes are very large (5-10x larger than H.264).
| Device | M2TS | AVI |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
M2TS to AVI conversion bridges the gap between modern HD recording formats and legacy computing infrastructure. Choose the video codec inside AVI based on your target system's requirements.
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処理後にファイルを自動削除
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| No |
| 特徴 | M2TS | AVI |
|---|---|---|
| 正式名称 | Blu-ray BDAV MPEG-2 Transport Stream | Audio Video Interleave |
| 拡張子 | .m2ts | .avi |
| 最適な用途 | Blu-ray format | Windows native |