virtual kdu_field_order get_field_order( )
Java: int Get_field_order( )
[Declared in "../apps/compressed_io/kdu_video_io.h"]
Returns KDU_FIELDS_NONE if the video track contains progressive scan frames. Some video sources may not be able to support anything other than progressive scan frames; however, it is convenient to provide support for interlaced formats directly from the abstract base class.
For interlaced video, the function returns one of KDU_FIELDS_TOP_FIRST or KDU_FIELDS_TOP_SECOND, meaning that the frames are interlaced with the first (respectively, second) field (in temporal sequence) holding the frame's top line.