Convert MTS to AVI — Free Online Converter
Convert AVCHD Video (.mts) to Audio Video Interleave (.avi) online for free. Fast, secure video conversion with no watermarks or registration....
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Cách chuyển đổi
Upload your .mts 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.
About MTS to AVI Conversion
AVI (Audio Video Interleave), Microsoft's 1992 video container, uses an indexed frame structure that enables fast, frame-accurate seeking — a critical feature for video editing that the MPEG-2 Transport Stream format used by MTS/AVCHD lacks. Converting MTS to AVI moves camcorder footage into an editing-friendly container compatible with VirtualDub, older versions of Adobe Premiere, and Windows-based video production systems.
Why Convert MTS to AVI?
The MPEG-2 Transport Stream container used by AVCHD was designed for streaming and broadcast, not for frame-accurate editing. Its packet-based structure can cause timeline misalignment in editors that expect AVI's sequential frame index. Some NLE software (particularly older Windows-based systems) only accepts AVI input, and scientific video analysis tools often require AVI for frame-by-frame examination.
AVI also supports uncompressed and lossless intermediate codecs (HuffYUV, Lagarith, UTVideo) that are essential for multi-generation editing workflows. Converting MTS camcorder footage to a lossless AVI intermediate eliminates compression artifacts before grading, compositing, and effects processing.
Common Use Cases
- Importing camcorder footage into VirtualDub for frame-level editing and filtering
- Preparing AVCHD recordings for legacy Windows NLE systems requiring AVI input
- Creating lossless AVI intermediates from camcorder footage for professional post-production
- Loading camcorder video into scientific analysis software that mandates AVI format
- Converting AVCHD to AVI for forensic video analysis with frame-accurate seeking
How It Works
FFmpeg deinterlaces and transcodes: `-vf yadif -c:v libx264 -crf 18 -c:a pcm_s16le -f avi` for compressed AVI, or `-vf yadif -c:v huffyuv -c:a pcm_s16le` for lossless AVI intermediate. The AVI container does not support B-frames natively, so H.264 encoding should use `-bf 0` or Baseline profile if stream copying is attempted. Uncompressed PCM audio is standard for editing workflows.
Quality & Performance
Lossless AVI (HuffYUV/UTVideo) preserves every pixel from the deinterlaced MTS source, providing the maximum possible editing quality. H.264 at CRF 18 is visually lossless with a reasonable file size penalty. Uncompressed rawvideo in AVI is also possible but produces approximately 11 GB per minute at 1080p.
Device Compatibility
| Device | MTS | AVI |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Recommended Settings by Platform
YouTube
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
TikTok
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Twitter/X
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Discord
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
Tips for Best Results
- 1Use HuffYUV or UTVideo codec for lossless intermediates — they provide 2:1 compression with zero quality loss
- 2Always deinterlace MTS footage before encoding to AVI — interlaced content causes problems in most editing software
- 3Pair video with PCM audio (not compressed) for editing workflows — every editor handles PCM natively
- 4For VirtualDub compatibility, use AVI with Xvid, H.264, or HuffYUV — these are its best-supported codecs
- 5If the AVI file exceeds 2 GB, verify your target application supports OpenDML (AVI 2.0) format
Related Conversions
MTS to AVI conversion gives editors frame-accurate, indexed video from AVCHD camcorder recordings, suitable for legacy NLE systems and scientific analysis tools that require the AVI container format.