User Manual

Raster Sizes
1534
The format you select to work in also determines which HD compression is used by your Avid
editing application. For example, if your HD project format is 1080i 59.94 and you select a raster
dimension of 1440 x 1080, the Video Resolution menu in the Media Creation settings dialog box
displays the following options:
• DNxHD-TR 145 MXF
• XDCAM HD 17.5Mbits MXF
• HDV 1080i MXF
• XDCAM HD 35Mbits MXF
You can open an existing HD project (for example, a 1080i 50 HDV project) created either with
an earlier version of an Avid editing application or with a version that does not support Raster
Dimension selection. You can also create a new project using Raster Dimension selection that
has the same size used in an existing project. Use the following guidelines when switching
between existing and new project types.
If you open a new HD project on an Avid editing application that does not support all Raster
Dimension options, the project switches to the standard raster (see “Raster Sizes” on page 1534).
In this case, you do not receive the performance benefit of using the native raster size. When you
move to an environment where other rasters are supported, you can manually switch your project
to a specific raster. For example:
• If you create a 1080i 50/1440 x 1080 project on a Media Composer Nitris DX system and
then open it in Avid Symphony Nitris, the project switches to the standard raster (1920 x
1080). When you save the project, it saves with the standard raster.
Raster Sizes
The following tables list the raster dimensions available for each compression format and project
type. You should select a format depending on your workflow and playback mode. (For
information on video quality playback modes, see “Video Quality Options for Playback” on
page 516.)
Existing Project Type New Project Type Raster Dimension
1080i 50 1080i 50 1920 x 1080
1080i 50 HDV 1080i 50 1440 x 1080
1080p 23.976 1080p 23.976 1920 x 1080
720p 29.97 HDV 720p 29.97 1280 x 720