The .MTS is an AVCHD file format (Advanced Video Codec High Definition), which is created specifically for high-definition digital camcorders. It was developed jointly by Sony and Panasonic in 2006 for use in their camcorders. Support for this format has grown and is now supported by Sony, Panasonic Canon, JVC, Hitachi, and Sanyo HD camcorders. The format itself is based on the popular MPEG4 video codec and supports 720p and 1080i HD video formats.

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As this format is relatively new, many video players or video editors are lacking of native support to it, or are only just starting to add support for this file type. Therefore, AVCHD camcorder users often meet problems one or another while playing or editing .MTS files. To relieve people’s pains, this article will give a solution to importing MTS file to Sony Vegas. If you have demand for this information, please go along with it.
Factually, Sony Vegas mentions that it is working with MTS from Vegas Pro 8 on its official site, but some users still encounter troubles while inputting MTS files to this editor. Ok, now let’s breakthrough these setbacks one by one together.
First of all, I will focus on solving MTS problems about Sony AVCHD camcorders whose hard drive is using a FAT32 file system.

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Once the footage is recorded in chunks longer than 20 minutes, the file size will exceed 2GB, since FAT file system does not support it, in this case, camcorder will automatically record the rest data to a new file.
For example, the footage will be recorded as:
00000.MTS (2GB)
00001.MTS (2GB)
00002.MTS (2GB)
00003.MTS (the last file size will be not more than 2GB)
When connecting your Sony camcorder to your PC, you will be directly navigated to the storage folder of your camera, and then you can copy it to the hard drive of your PC with ease. Also, Vegas may recognize the .MTS files and is willing to import them, however, Vegas is not always able to recognize these .MTS files in size of 2GB, at this time, the following problems may happen:
1. Choppy frames at the end of the 2GB footage;
2. Vegas refuses to import the 2GB video clip, and pops up a message “unrecognized file format”;
3. Vegas crashed after the file is imported

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What should we do now? Actually, you just need pay attention to one thing that is making sure Sony Picture Utility is installed on your PC. It is included with you Sony camcorder, if you’ve lost it, click here to download. As soon as installed, while your camcorder is connected to your PC, the “HDD Handycam Utility” will be automatically launched.