How to Convert AVCHD to MP4 on Windows
What AVCHD is, where the MTS/M2TS files live, how to batch convert, quality settings and troubleshooting.
Guides
Video conversion guides
Step-by-step guides for the formats that phones, editors and cloud services often refuse. Each guide covers a paid Windows workflow and a free alternative, so you can choose the right tool for the job.
How to Convert MTS to MP4 on Windows
Sony, Panasonic, Canon and JVC camcorder files, batch conversion, audio sync and free alternatives.
How to Convert M2TS to MP4 on Windows
AVCHD and Blu-ray M2TS files, large-file handling, bitrate choices and troubleshooting.
How to Convert 3GP to MP4 on Windows
Recover old phone clips, keep the original resolution, and make them playable on modern devices.
How to Convert FLV to MP4 on Windows
Rescue old Flash videos, understand FLV codecs, and move the footage into a modern container.
Not sure which tool you need?
The HD converter handles AVCHD, MTS and M2TS. The MP4 converter handles AVI, MOV, MPEG, WMV and 3GP.
File extensions
What am I looking at?
| Extension | Usually from | What it is |
|---|---|---|
| .MTS | AVCHD camcorders | MPEG transport stream with H.264 video; camcorder-side naming |
| .M2TS | AVCHD camcorders, Blu-ray | Same family as MTS, often used in disc/folder structures |
| .3GP | Older mobile phones | Low-bitrate mobile container; usually H.263 or H.264 |
| .FLV | Old web video / Flash | Flash Video container; often H.264, sometimes VP6 or Sorenson Spark |
| .MP4 | Phones, cameras, web | Modern container; H.264 or HEVC video with AAC audio |
Extensions are hints, not guarantees. Use a tool such as MediaInfo if you need the exact codec.
Prefer a one-click Windows tool?
The HD converter handles AVCHD/MTS/M2TS. The MP4 converter handles AVI/MOV/MPEG/WMV/3GP. Both have free trials.