MTS

Files that contain the .mts file extension are AVCHD video files. AVCHD is an acronym for Advanced Video Codec High Definition. These MTS files contain high-def MPEG transport stream videos that have been captured by certain video camcorders. MTS files containing high-def video streams and can support both the 720p and 1080i HD video formats. The files can be played back on a user's computer using a variety of software applications including the Windows Media Player.

- - File

MP4

MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images.[2] Like most modern container formats, it allows streaming over the Internet. The only official filename extension for MPEG-4 Part 14 files is .mp4. MPEG-4 Part 14 (formally ISO/IEC 14496-14:2003) is a standard specified as a part of MPEG-4.

- - Wikipedia

Step-By-Step to Convert MTS to MP4

Interface

Step 1. Download and install the program, then double click it to run it, and then you'll see the main interface of the program.

Load Files

Step 2. Click "Add File(s)" button. Here you can select "Add Video" or "Add Folder" button to add files as you like.

Profile

Step 3. Click the drop-down arrow right beside the "Profile" column and select your desired video format from the drop-down list.

Edit

Step 4. Click "Edit" button to customize the output video like Effect, Trim, Crop, 3D Settings and Watermark.

More Reading