There is only one file type that uses the .MTA extension:
Samsung AllShare Metadata File
File created by Samsung AllShare, a program used for sharing multimedia files between PCs, TVs, mobile phones, and other network ready DLNA devices; referred to as a "chapter" file since it contains indexing information for navigating through the multimedia files.
MTA files are automatically generated by Samsung AllShare when a multimedia file is used. They are created in the same directory as each source multimedia file and use the naming convention file.avi.mta, where the source file is named file.avi.
|Samsung AllShare Play||Included|
Updated: May 24, 2012