Interlaced but not

[tb582]

How can a video be tagged as interlaced in Media info yet when I play back the asset frame by frame I see no interlacing?

[poisondeathray]

mediainfo just reads the header information it can be incorrect

for example , actual content can be progressive, but encoded as interlaced , and mediainfo would call it "interlaced"

another possibility is your decoder or application used to parse, is applying deinterlace filter or separating fields automatically - most NLE's and editing software do this

[tb582]

I'm using VLC deinterlace filter is set to off and there is no interlacing, so that means that the video header info is wrong? How can I see the exact details of the video header?

Its an MPEG file so QT atom viewer wont work

[poisondeathray]

Looking at the header is unreliable. It's like "judging a book by it's cover" . But that' s what mediainfo is doing. Alternatively you can use a hex editor to view the header information - again this does not necessarily bear any truth to the actual content

If you want to find the true nature, you need to examine the fields (not frames) and step through them. Consecutive repeated fields would be progressive, different fields would be interlaced, because each field is a separate moment in time - that's the basic definiton of interlaced. (There are other combinations like telecined, field blended but those are the main ones)

If you want a procedure on a PC to do this with avisynth .
http://neuron2.net/faq.html#analysis

EDIT: I just saw your specs and you are on a MAC. Sorry - I don't know how you would do this on a mac. Perhaps a mod can move this thread.