What you need?
Introduction
Step 1: Add files before MTS to AVI conversion
Step 2: Choose profile, destination and settings
Step 3: Convert MTS to AVI
Next part: How to trim, crop, edit video, and capture picture?
Software: 4Videosoft MTS Converter
OS Supported: Windows NT4/2000/2003/XP and Windows Vista, Windows 7
Hardware Requirements: 800MHz Intel or AMD CPU, or above; 512MB RAM or more
Introduction:
This detailed tutorial below is designed to help you get started using 4Videosoft MTS Converter to accomplish conversion from MTS to AVI, or convert between other popular video formats even high definition video for playback on your portable multimedia players.
First, it is necessary to download, install and run the software.
Step 1: Add files before MTS to AVI conversion

After launching the MTS to AVI Converter, click button "Add File"
on the toolbar, a dialog pops up for choosing video files to the program. If you want to delete some video files which have been added, just select the video and click button Remove.
4Videosoft MTS Converter can convert MTS to common videos & audios and play on different devices. Under “Profile”, click the drop down arrow and choose AVI as your output format from the list. Click “Browse” to find a folder to place your converted files.
Tip: You can choose audio track and subtitle

Go to Settings panel and do some settings for MTS to AVI conversion. You may also do some other settings like video Encoder, frame rate, audio Channels and more parameters before converting.

Click
button on the toolbar to start MTS to AVI conversion process.
4Videosoft MTS Converter also provides you to trim video, crop play area, capture the picture, you can learn it from How to trim, crop, edit video, and capture picture?
