Use the GSpot v2.70a to verify the recorded MPEG file is interlaced [I/L] or progressive [PROG] :
http://www.headbands.com/gspot/v26x/GSpot270a.zip
http://www.headbands.com/gspot/mpeg..._indicators.htm

[I/L] or [PROG] :
These two indicators indicate "interlaced" or "progressive scan" (non-interlaced), respectively. Inclusion of the pair is a convenience, albeit a bit redundant, as the two are complementary: any time one is active the other is not. They may, however, both be grayed; as with the other indicators, this simply means the information is not available.