Extract a single field from an interlaced image using stride arithmetic to avoid wasting CPU time. The output frames are marked as non-interlaced.

This filter accepts the following named options:

type

Specify whether to extract the top (if the value is 0 or top) or the bottom field (if the value is 1 or bottom).

If the option key is not specified, the first value sets the type option. For example:

field=bottom

is equivalent to:

field=type=bottom