4.2

Pixel aspect ratio: Use this pop-up menu to set the pixel
aspect ratio (the ratio between the image frame width and
height). You can also modify the aspect ratio of the output file
using cropping and padding properties; for more information,
see .
Note: This property can be set when the frame size property
uses a specific frame size (for example, 720 x 480).
Frame rate: Use this pop-up menu to set the playback rate
(the number of images displayed per second) for the output
file. For more information, see .
Field order: Use the pop-up menu to set the output scanning
method (either the field dominance or a conversion to
progressive scanning). There are four options:
Same as Source: Maintains the same scanning method
used by the source media file.
Progressive: Scans complete frames (not frames divided
into interlaced fields).
Top First: Scans interlaced fields, giving dominance (field
order) to the top field.
Bottom First: Scans interlaced fields, giving dominance
(field order) to the bottom field.
Note: If you use a QuickTime movie preset based on the
H.264 format (such as any of the presets in the Video Sharing
Services settings), the “Field order” pop-up menu is
automatically set to Progressive, and the other options are
disabled. To set the field order to an interlaced option, click
the Change button in the “QuickTime settings” area of the
Video inspector, then click the Encoding pop-up menu and
Modify frame size overview
Frame rate options overview