5 description: Correct the field order of interlaced video.
7 copyright: Ushodaya Enterprises Limited
8 creator: Dan Dennedy <dan@dennedy.org>
15 This filter is automatically invoked by the loader as part of image
17 It compares the frame property top_field_first to the consumer property with
18 the same name to determine if correction is needed.
19 It performs field order correction by shifting the image down by one line.
20 If you set the property meta.swap_fields=1 on the producer, then this filter
21 swaps the fields of an interlaced frame in addition to any field order
22 correction by shifting the image.