659 MPEG-1 Program Stream Video MPEG-1 is a lossy compression standard for video and audio, intended for use in Digital Storage Media (DSM) such as VideoCD and DVD (at the same encoding standard as VCD). It is designed to handle video frame-sizes of 352 x 288px, at a frame-rate of 25 frames per second (PAL) and a data rate of around 1.2Mbits/s; audio: up to 320 kbits/s (MPEG-1 Audio Layer III, *.mp3). MPEG-1 supports random access to stream content on playback. MPEG-1 Video supports only 'progressive' frame video. MPEG-1 compression can be relatively inefficient by modern standards. An MPG-1 ‘Program’ stream (PS) file (*.mpg, *.mpeg) generally contain both video and audio streams, generally for synchronised playback, and may carry a variety of other data (e.g. video captions). Binary Big-endian (Motorola) 1 Digital Preservation Department / The National Archives 11 Mar 2005 v.123- Priority added over fmt/134 MPEG 1/2 Audio Layer 3. Submitted by Digital Preservation Department, The National Archives (UK). 9 Jun 2026 public.mpeg Apple Uniform Type Identifier video/mpeg MIME x-fmt/385 PUID mpeg File extension mpg File extension 122 MPEG-1 Program Stream Pack Header Start Code + System Header Start Code 1 Absolute from BOF 0 0 000001BA{8-12}000001BB Has lower priority than 660 MPEG-2 Program Stream Has lower priority than 1207 Video Object File (MPEG-2 subset) Has priority over 687 MPEG 1/2 Audio Layer 3