Why the Burning Studio 10 does not accept "MTS" extension video files? The program says that he can't find the necessary codecs.
MTS files hold a great quality similar to True HD and if you try to burn them as a VIDEO medium, the quality will change. Try installing Combined Community Codec Pack then burn the file again. If you were lacking codecs, this should help but keep in mind that converting the file will also change its quality so it's best to burn it as DVD data.