Quicktime File Format (2012-08-14).pdf

Media Data Atom TypesVideo MediaDescription4:3 non-square 525 (NTSC)4:3 non-square 625 (PAL)16:9 analog (composite NTSC or PAL)16:9 digital 525 (NTSC)16:9 digital 625 (PAL)1920x1035 HDTV (per SMPTE 260M-1992)1920x1035 HDTV (per SMPTE RP 187-1995)1920x1080 HDTV or 1280x720 HDTVhSpacing105944011811310181vSpacing11543338111810621MPEG-4 Elementary Stream Descriptor Atom ('esds')This atom contains an MPEG-4 elementary stream descriptor atom. This is a required extension to the videosample description for MPEG-4 video. This extension appears in video sample descriptions only when the codectype is 'mp4v'.Note The elementary stream descriptor which this atom contains is defined in the MPEG-4specification ISO/IEC FDIS 14496-1.SizeAn unsigned 32-bit integer holding the size of the elementary stream descriptor atom.TypeAn unsigned 32-bit field containing the four-character code 'esds'VersionAn unsigned 8-bit integer set to zero.FlagsA 24-bit field reserved for flags, currently set to zero.Elementary Stream DescriptorAn elementary stream descriptor for MPEG-4 video, as defined in the MPEG-4 specification ISO/IEC 14496-1and subject to the restrictions for storage in MPEG-4 files specified in ISO/IEC 14496-14.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.160