MTV Video (.AMV)
MTV Video (.AMV) is one of a pair of related video file formats that go by a virtually identical set of names. The formats are associated with some Chinese portable video/music players. This article covers the one whose file extension is usually .AMV, and which begins with a "RIFF" signature. For the other one, see MTV Movie (.MTV).
.AMV files start with ASCII "
RIFF", have "
AMV " at offset 8, and (usually?) bytes
00 00 00 00 at offset 4.