High-definition (hd) video – Adobe Media Encoder User Manual
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compositing of video. Video encoded with the H.264 codec in an F4V container does not include an alpha channel.
H.264 and On2 VP6 use both temporal and spatial compression.
For more information about FLV and F4V formats and the H.264 and On2 VP6 encoders, see “Video formats and Flash” in Using Flash
Professional CS5.
Fabio Sonnati provides recommendations for settings for H.264 (F4V) movies for mobile devices on the
.
High-definition (HD) video
High-definition (HD) video refers to any video format with pixel dimensions greater than those of standard-definition (SD) video formats. Typically,
standard-definition refers to digital formats with pixel dimensions close to those of analog TV standards, such as NTSC and PAL (around 480 or
576 vertical lines, respectively). The most common HD formats have pixel dimensions of 1280x720 or 1920x1080, with an image aspect ratio of
16:9.
HD video formats include interlaced and noninterlaced varieties. Typically, the highest-resolution formats are interlaced at the higher frame rates,
because noninterlaced video at these pixel dimensions would require a prohibitively high data rate.
HD video formats are designated by their vertical pixel dimensions, scan mode, and frame or field rate (depending on the scan mode). For
example, 1080i60 denotes interlaced scanning of 60 interlaced 1920x1080 fields per second, whereas 720p30 denotes progressive scanning of 30
noninterlaced 1280x720 frames per second. In both cases, the frame rate is approximately 30 frames per second.
Trish and Chris Meyer provide tips for planning and delivering high-definition and widescreen work in articles on the ProVideo Coalition website:
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