MPEG-1 does not support interlaced video, but MPEG-2 does. MPEG-1 can actually go up to around 5000kbps. In fact, compliant MPEG-1 files are quality limited because they are not allowed to exceed around 1.5 Mbit/sec (at least, if producing a standard "Constrained Parameters Bitstream"). The MPEG-1 bitrate is variable, but there is a sweetspot around 1.2 - 1.5 Mbit/sec. MPEG-1 is roughly VHS in quality (once expanded to the same number of pixels - it looks ok Here are the bitrates, dimensions, and physical media they are used on: Unfortunately the overlapping standard formats (MPEG-1 and MPEG-2) are quite old (MPEG-1 standardized Of these, only MP3 is an official standard. The overlapping formats for audio are: AIFF (Apple), AU (Unix), MP3 (= MPEG-1, Layer 3), WAV (Windows). On Apple operating systems, in practice (because of the need for an overlapping codec). This constraint means that AVI is not generally that well supported (WMP support for QuickTime is only for version 2.0 and earlier, which effectively means none).ĪVI is a proprietary Microsoft format, and support is dependent on theĬodec used inside the format (whereas with MPEG-* formats, the codec is fixed). There is a depressingly small intersection of supported audio and videoįormats between the players that are bundledįor video, the overlap consists solely of MPEG-1 and AVI Video Encoding Choosing a Audio or Video Internet Distribution Format
0 kommentar(er)
