Extensions: mov, qt, mp4, m4v, m4a, m4p, m4b, m4r, k3g, skm, 3gp, 3g2 Company: Apple Official specification: http://developer.apple.com/mac/library/documentation/QuickTime/QTFF/index.html (mirrored PDF) ISO base media file format: ISO/IEC 14496-12:2008+Cor.1+Cor.2 MIME Types: mov, qt: video/quicktime or video/x-quicktime m4a, m4b: audio/x-m4a Known FOURCCs The following sections list FOURCCs known