in display order, based on decoding information in decoding order. Now
set properly, immediately upon completion of decode.

Based on original patch from Reinhard Nissl,  rnisssl % gmx , de
Original Thread: [FFmpeg-devel] H.264 + PAFF: BBC HD recording shows
extreme interlacing artefacts, Thu, 01 Nov 2007 22:43:09

Originally committed as revision 10931 to svn://svn.ffmpeg.org/ffmpeg/trunk