Videomaker – Learn video production and editing, camera reviews › Forums › Cameras and Camcorders › Consumer Camcorders › For the best quality out put, CBR 1440 or FHD? › FHD is the same thing as 1
FHD is the same thing as 1920×1080, at least as it stands this day in age. CBR1440 is 1440×1080.
Changing the extension will not change the contents of the video file. If the file name starts out as .MTS, then it’s probably AVCHD. Changing the end of the filename to .m2ts will certainly not change the contents.