File formats beginning with M
Extension
Format
.m2ts.mts
M2TSMPEG-2 Transport Stream with Timestamp
.m4a
M4AMPEG-4 Audio File
.md.markdown
MarkdownMarkdown Text Document
.mid.midi
MIDIStandard MIDI File
.mkv
MKVMatroska Video
.mobi.prc
MOBIMobipocket File Format
.mov.qt
MOVQuickTime File Format
.mp3
MP3MPEG Audio Layer III
.mp4
MP4MPEG-4 Part 14
.mpeg.mpg.mpe
MPEGMPEG Video
10 formats