MTS is a filename extension for an Advanced Video Coding High Definition (AVCHD) video file. It contains a .mts filename extension and contains a HD MPEG video captured using certaing camcorder models like JVC, Sony, Canon, and Sanyo. It can support up to 1080i x 720p HD videos and can open on multiple software.
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FLAC (Free Lossless Audio Codec) is a free lossless digital audio format developed by Xiph.Org. A compressed FLAC file can be reduced by between 50-70% of the original size and decompress back to the original sound data. This file format supports metadata like ID3 tags, cover art, and album title.